Search Results — 2000 specimen records retrieved (1469 records with coordinates)
(That's the default maximum. Contact Jason Alexander for larger data requests.)

Results for search: County=MARIN; Source=All; Collector=Howell;   
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(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 Records are made available under the CCH Data Use Terms.

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A yellow cell in the column headed "?", for records with coordinates, indicates a discrepancy with respect to range as specified in the eFlora. Read more ...
? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  UC1176780  Abronia umbellata John Thomas Howell 1947-5-14 23157 Marin McClure Beach Comment
  CAS-BOT-BC177035  Acacia dealbata John Thomas Howell 1943-8-29 19312 Marin On Summit (Avenue) Ridge above Mill Valley 152 Comment
  RSA414924  Acacia dealbata J. T. Howell 1943-8-29 19312 Marin Summit ridge above Mill Valley. 152 Comment
  UCSB2958  Acacia dealbata Howell, John 1943-8-29 Marin Summit (Avenue) ridge above Mill Valley 152 Comment
  CAS-BOT-BC331532  Acer macrophyllum John Thomas Howell 1927-5-8 2357 Marin Ross Valley Comment
  CAS-BOT-BC336653  Acer negundo var. californicum John Thomas Howell 1944-5-7 19443 Marin Larkspur Comment
  CAS-BOT-BC28672  Achillea millefolium John Thomas Howell 1947-5-14 23163 Marin McClure Beach Comment
  UC1176901  Achillea millefolium J. Thomas Howell 1947-5-14 23163 Marin MaClure Beach Comment
  CAS-BOT-BC30422  Achyrachaena mollis John Thomas Howell 1946-4-18 21572 Marin Black Point Comment
  CAS-BOT-BC30423  Achyrachaena mollis John Thomas Howell 1945-5-9 20824 Marin Between Hamilton Field and Ignacio Comment
  UC1177321  Achyrachaena mollis J. Thomas Howell 1946-4-18 21672 Marin Black Point Comment
  CAS-BOT-BC132896  Adenostoma fasciculatum John Thomas Howell 1946-5-12 s.n. Marin Carson Ridge Comment
  CAS-BOT-BC132899  Adenostoma fasciculatum John Thomas Howell 1930-12-28 5715 Marin Lower slopes of Mt. Tamalpais, Mill Valley Comment
  CAS-BOT-BC9069  Aegilops triuncialis John Thomas Howell 1953-7-5 29107 Marin East Peak, Mt. Tamalpais Comment
  UCD51566  Aegilops triuncialis John Thomas Howell 1953-7-5 29107 Marin East Peak, Mt. Tamalpais. Comment
Read comments
Aug 10 2011
  CAS-BOT-BC29523  Agoseris apargioides J. T. Howell 1946-5-4 21753 Marin Dillons Beach Comment
  UC1177280  Agoseris apargioides var. eastwoodiae J. Thomas Howell 1938-5-28 Marin Pt. Reyes dunes Pt. Reyes Comment
  UC1176922  Agoseris grandiflora var. grandiflora J. Thomas Howell 1950-6-4 26620 Marin Blithedale Canyon; Mill Valley Comment
  CAS-BOT-BC22906  Agoseris heterophylla John Thomas Howell 1947-5-4 23125 Marin San Rafael Hills Comment
  CAS-BOT-BC22907  Agoseris heterophylla John Thomas Howell 1943-5-9 17981 Marin San Rafael Hills Comment
  CAS-BOT-BC22948  Agoseris heterophylla John Thomas Howell 1943-5-22 18131 Marin Fairfax hills Comment
  CAS-BOT-BC22949  Agoseris heterophylla John Thomas Howell 1947-4-27 23102 Marin Bald Mt. west of San Anselmo Comment
  CAS-BOT-BC22901  Agoseris heterophylla John Thomas Howell 1941-6-8 s.n. Marin San Raphael Hills Comment
  CAS-BOT-BC22947  Agoseris heterophylla John Thomas Howell 1944-6-18 s.n. Marin Fish Grade, Mt. Tamalpais Comment
  RSA128951  Agoseris heterophylla J. T. Howell 1947-5-4 23125 Marin San Rafael Hills. Comment
  UC1106266  Agoseris heterophylla var. heterophylla J. Thomas Howell 1947-5-4 23125 Marin San Rafael Hills Comment
  UC1106267  Agoseris heterophylla var. heterophylla J. Thomas Howell 1944-5-14 19480 Marin on serpentine Chileno Valley Comment
  CAS-BOT-BC13122  Agoseris hirsuta John Thomas Howell 1946-5-19 21911 Marin Meadow Club, Fairfax Hills Comment
  CAS-BOT-BC13123  Agoseris hirsuta John Thomas Howell 1945-8-12 21374 Marin Near Rock Spring, Mount Tamalpais Comment
  CAS-BOT-BC13132  Agoseris hirsuta John Thomas Howell 1937-6-13 13050 Marin Bolinas Comment
  SEINET10506825  Agrostis John Thomas Howell 1947-5-14 Howell 23149 Marin Drakes Estero, WNW of Mount Vision. Restricted to gravelly slope on outcrop of diatomaceous shale of Monterey Series. Type collection. Comment
  SEINET10806860  Agrostis John Thomas Howell 1947-4-23 Howell 23062 Marin Drakes Estero west of Mt. Vision, Pt. Reyes Peninsula. Comment
  CAS-BOT-BC188  Agrostis aristiglumis John Thomas Howell 1947-5-14 23149 Marin Drakes Estero WNW of Mt. Vision Comment
  NY327617  Agrostis aristiglumis J. T. Howell 1947-5-14 1411 Marin Drakes Estero, WNW of Mount Vision Comment
  SEINET883236 Image available Agrostis aristiglumis J. T. Howell 1947-1 23149 Marin Drakes Estero WNW of Mt. Vision. Comment
  SEINET883237 Image available Agrostis aristiglumis J. T. Howell 1947-1 23149 Marin Drakes Estero WNW of Mount Vision. Comment
  UCD51796  Agrostis avenacea John Thomas Howell 1971-6-2 47649 Marin borderin S.F. Bay on road from San Rafael to McNear's. Comment
  CAS-BOT-BC127503  Agrostis blasdalei John Thomas Howell 1946-5-26 21952 Marin Dune hill near radio station, Point Reyes Peninsula. Comment
  CAS-BOT-BC127507  Agrostis blasdalei John Thomas Howell 1946-6-9 22006 Marin North of Abbotts Lagoon. Comment
  UC1106213  Agrostis blasdalei John Thomas Howell 1947-5-14 23150 Marin wnw Mount Vision; Drakes Estero Comment
  SEINET10789851  Agrostis californica John Thomas Howell 1946-6-30 Howell 22146 Marin Rodeo Lagoon. Comment
  CAS-BOT-BC127492  Agrostis capillaris John Thomas Howell 1947-5-14 23165 Marin McClure Beach. Comment
  RSA126461  Agrostis capillaris J. T. Howell 1945-6-12 20955 Marin Near radio station, Pt. Reyes Peninsula. Comment
  CAS-BOT-BC127426  Agrostis densiflora John Thomas Howell 1947-9-6 24180 Marin Dillons Beach. Comment
  CAS-BOT-BC127427  Agrostis densiflora John Thomas Howell 1945-6-12 20962 Marin Near radio station, Point Reyes Peninsula. Comment
  CAS-BOT-BC127428  Agrostis densiflora John Thomas Howell 1945-6-12 20962 Marin Near radio station, Point Reyes Peninsula. Comment
  CAS-BOT-BC127429  Agrostis densiflora John Thomas Howell 1945-7-29 21357 Marin Between Bolinas radio station and Rio Honda. Comment
  CAS-BOT-BC127436  Agrostis densiflora John Thomas Howell 1941-6-15 s.n. Marin Point Reyes Lighthouse. Comment
  CAS-BOT-BC127474  Agrostis densiflora John Thomas Howell 1946-6-30 22146 Marin Rodeo Lagoon. Comment
  CAS-BOT-BC175940  Agrostis densiflora John Thomas Howell 1946-6-30 22146 Marin Rodeo Lagoon Comment
  UC1177030  Agrostis densiflora John Thomas Howell 1946-6-30 22146 Marin Rodeo Lagoon Comment
  UCD51982  Agrostis densiflora John Thomas Howell 1945-7-4 21274 Marin Inverness. Comment
  UCD51985  Agrostis densiflora John Thomas Howell 1945-7-4 21271 Marin Inverness Ridge. Comment
  UCD51986  Agrostis densiflora John Thomas Howell 1945-7-1 21264 Marin Tiburon. Comment
  RSA126459  Agrostis densiflora J. T. Howell 1946-6-30 22146 Marin Rodeo Lagoon Comment
  UCD51983  Agrostis densiflora John Thomas Howell 1945-6-3 20922 Marin Twin Beaches. Comment
  CAS-BOT-BC127184  Agrostis exarata John Thomas Howell 1966-7-20 41992 Marin Area adjacent to the John Thomas Howell Botanical Garden, Tiburon. Comment
  CAS-BOT-BC127192  Agrostis exarata John Thomas Howell 1943-6-6 s.n. Marin On railroad grade above Muir Woods. Comment
  CAS-BOT-BC127194  Agrostis exarata John Thomas Howell 1939-7-2 s.n. Marin Elk Valley. Comment
  CAS-BOT-BC127204  Agrostis exarata John Thomas Howell 1947-6-18 23265 Marin Laguna, Chileno Valley. Comment
  CAS-BOT-BC127205  Agrostis exarata John Thomas Howell 1946-6-13 22048 Marin East of Aurora School at Sonoma county line. Comment
  CAS-BOT-BC127212  Agrostis exarata John Thomas Howell 1943-5-22 18125 Marin Deer Park near Fairfax. Comment
  CAS-BOT-BC127214  Agrostis exarata John Thomas Howell 1945-6-24 21247 Marin Mount Tamalpais. Lagunitas Meadows. Comment
  CAS-BOT-BC127215  Agrostis exarata John Thomas Howell 1943-5-22 18156 Marin Lagunitas Meadows. Comment
  CAS-BOT-BC127220  Agrostis exarata John Thomas Howell 1944-7-7 19676 Marin Lagunitas Creek at Berry Trail. Comment
  CAS-BOT-BC127223  Agrostis exarata John Thomas Howell 1939-3-14 14661 Marin Phoenix Lake. Comment
  CAS-BOT-BC127226  Agrostis exarata John Thomas Howell 1945-7-15 21310 Marin Near Liberty's. Comment
  CAS-BOT-BC127227  Agrostis exarata John Thomas Howell 1942-6-7 s.n. Marin San Anselmo Canyon. Comment
  CAS-BOT-BC127228  Agrostis exarata John Thomas Howell 1946-6-16 22088 Marin Point Reyes Station. Comment
  CAS-BOT-BC127229  Agrostis exarata John Thomas Howell 1943-6-6 s.n. Marin Mill Valley steps. Comment
  UC1177026  Agrostis exarata John Thomas Howell 1945-7-4 21271 Marin Inverness Ridge Comment
  UC1177027  Agrostis exarata John Thomas Howell 1945-6-24 21237 Marin Willow Meadow Mt. Tamalpais Comment
  UC1177037  Agrostis exarata John Thomas Howell 1946-7-7 22207 Marin Potrero Meadow Mt. Tamalpais Comment
  UCD52386  Agrostis exarata John Thomas Howell 1945-6-24 21235 Marin Barths Retreat, Mt. Tamalpais. Comment
  UCD52397  Agrostis exarata John Thomas Howell 1943-5-22 18156 Marin Lagunitas Meadows. Comment
  UCD52516  Agrostis exarata John Thomas Howell 1944-6-25 19661 Marin between Santa Venetia and Chinese Camp. Comment
  RSA126479  Agrostis exarata J. T. Howell 1944-9-10 20737 Marin Shell Beach, north of Inverners Comment
  CAS-BOT-BC139666  Agrostis gigantea John Thomas Howell 1939-6-25 14810 Marin Near West Point, Mount Tamalpais. Comment
  CAS-BOT-BC139668  Agrostis gigantea John Thomas Howell 1941-7-6 16371 Marin Lake Lagunitas Meadows. Comment
  CAS-BOT-BC139669  Agrostis gigantea John Thomas Howell 1947-9-6 24181 Marin Dillons Beach. Comment
  CAS-BOT-BC139670  Agrostis gigantea John Thomas Howell 1944-6-25 19644 Marin Santa Ventia. Comment
  CAS-BOT-BC139673  Agrostis gigantea John Thomas Howell 1943-7-4 18279 Marin Inverness. Comment
  RSA126471  Agrostis gigantea J. T. Howell 1941-7-6 16371 Marin Lake Lagunitas Meadows Comment
  SEINET199907  Agrostis gigantea John T Howell 1938-10-15 Marin Fairbax Rd near Alpien Lake, Marin Co. Comment
  SEINET10509947  Agrostis gigantea John Thomas Howell 1944-7-30 Howell s.n. Marin Near Locust Ave., Mill Valley. Comment
  CAS-BOT-BC139478  Agrostis hallii John Thomas Howell 1943-6-13 s.n. Marin Sausalito. Comment
  CAS-BOT-BC139487  Agrostis hallii John Thomas Howell 1946-6-30 22166 Marin Rodeo Lagoon. Comment
  CAS-BOT-BC139490  Agrostis hallii John Thomas Howell 1944-6-4 19560 Marin Near Mount Vision west of Inverness. Comment
  CAS-BOT-BC139493  Agrostis hallii John Thomas Howell 1943-7-4 s.n. Marin Near Ledum Swamps on road to Point Reyes. Comment
  SEINET199904  Agrostis hallii John Howell 1943-7-3 Marin Near Bootjack, Mt. Tamalpais Comment
  HSC90928  Agrostis hendersonii Thomas J. Howell 1947-4-23 23062 Marin E side of Drakes Estero W of Mt. Vision, Pt. Reyes Peninsula Comment
  UCD51755  Agrostis hendersonii John Thomas Howell 1947-4-23 23062 Marin Pt. Reyes Peninsula, Drakes Estero, west of Mt. Vision. Comment
Read comments
Nov 29 2010
  CAS-BOT-BC196  Agrostis longiligula var. australis John Thomas Howell 1943-7-4 18250 Marin Ledum Swamp on road to Pt. Reyes. Comment
  CAS-BOT-BC138834  Agrostis microphylla John Thomas Howell 1962-6-10 37416 Marin Mount Tamalpais. Comment
  UCD53047  Agrostis microphylla John Thomas Howell 1962-6-10 37416 Marin Rock Springs, Mt. Tamalpais. Comment
  CAS-BOT-BC139025  Agrostis pallens John Thomas Howell 1946-6-16 22073 Marin Inverness Park. Comment
  CAS-BOT-BC139032  Agrostis pallens John Thomas Howell 1946-6-30 22161 Marin Rodeo Lagoon. Comment
  CAS-BOT-BC139034  Agrostis pallens John Thomas Howell 1942-6-21 16981 Marin Carson Ridge. Comment
  CAS-BOT-BC139035  Agrostis pallens John Thomas Howell 1939-6-18 14781 Marin Near Mud Lake. Comment
  CAS-BOT-BC139040  Agrostis pallens John Thomas Howell 1943-5-9 17960 Marin San Rafael Hills. Black Canyon. Comment
  CAS-BOT-BC139048  Agrostis pallens John Thomas Howell; Catherine Best 1981-6-11 54064 Marin Point Reyes Peninsula. North Beach. Comment
  CAS-BOT-BC139049  Agrostis pallens John Thomas Howell 1945-9-13 21465 Marin Point Reyes Peninsula. Near radio station. Comment
  RSA126481  Agrostis pallens J. T. Howell 1943-7-11 s.n. Marin Potrero Meadow, Mt. Tamalpais Comment
  RSA126482  Agrostis pallens J. T. Howell 1942-6-21 16981 Marin Carson Ridge Comment
  UC1177038  Agrostis pallens John Thomas Howell 1943-5-22 Marin Fairfax Comment
  UCD53152  Agrostis pallens John Thomas Howell 1939-6-18 14781 Marin near Mud Lake, Inverness Ridge. Comment
  CAS-BOT-BC138658  Agrostis stolonifera John Thomas Howell 1944-7-9 19713 Marin South end of Tomales Bay. Comment
  UC1177036  Agrostis viridis John Thomas Howell 1944-6-25 19641 Marin San Rafael Comment
  UC1106208  Aira caryophyllea John Thomas Howell 1943-6-13 Marin Sausalito Comment
  CAS-BOT-BC138398  Aira caryophyllea var. capillaris John Thomas Howell 1947-4-27 23085 Marin Bald Mountain, west of San Anselmo. Comment
  CAS-BOT-BC138403  Aira caryophyllea var. capillaris John Thomas Howell 1945-5-6 20804 Marin San Rafael Hills. Comment
  CAS-BOT-BC138322  Aira caryophyllea var. caryophyllea John Thomas Howell 1966-5-25 41539 Marin John Thomas Howell Botanical Garden, Tiburon. Gully just north of garden area. Comment
  RSA126401  Aira elegans J. T. Howell 1947-4-27 23085 Marin Bald Mt. west of San Anselmo Comment
  CAS-BOT-BC138193  Aira praecox John Thomas Howell 1946-5-26 21958 Marin Ocean bluff, Point Reyes Lighthouse. Comment
  UC1177331  Allium amplectens John Thomas Howell 1946-5-12 21816 Marin Carson country Comment
  CAS-BOT-BC460758  Allium amplectens John Thomas Howell 1942-7-12 17036 Marin Northside Trail, Mt. Tamalpais Comment
  CAS-BOT-BC460759  Allium amplectens John Thomas Howell 1943-5-30 18186 Marin Northside Trail, Mt. Tamalpais Comment
  CAS-BOT-BC460761  Allium amplectens John Thomas Howell 1946-5-12 21816 Marin Carson Country Comment
  UC1177332  Allium dichlamydeum John Thomas Howell 1947-6-18 23276 Marin Dillons Beach Comment
  CAS-BOT-BC468976  Allium dichlamydeum John Thomas Howell 1946-5-16 21881 Marin Angel Island, on west side Comment
  UC1106277  Allium triquetrum John Thomas Howell 1950-4-23 26309 Marin along Summit Ave. Mill Valley, Summit Ave. Comment
  CAS-BOT-BC475484  Allium triquetrum John Thomas Howell 1950-4-23 26309 Marin Along Summit Ave, Mill Valley Comment
  CAS-BOT-BC476633  Allium unifolium John Thomas Howell 1945-6-24 21239 Marin Willow Meadow. Mt. Tamalpais. Comment
  UC1176758  Alnus rhombifolia John Thomas Howell 1940-5-12 Marin Lagunitas Creek Canyon Comment
  CAS-BOT-BC169314  Alnus rubra John Thomas Howell 1940-5-20 15485 Marin Inverness Comment
  UC1106210  Alopecurus aequalis var. sonomensis John Thomas Howell 21358 Marin Between Bolinas radio station and Rio Honda Comment
  SEINET10511142  Alopecurus howellii John Thomas Howell 1946-5-4 Howell 21702 Marin East of Auora School, at Sonoma County line, Comment
  CAS-BOT-BC137932  Alopecurus saccatus John Thomas Howell 1947-6-18 23254 Marin Laguna, Chileno Valley. Comment
  UC1176787  Amaranthus blitoides John Thomas Howell 1939-9-3 15339 Marin near Novato Comment
  UC1176788  Amaranthus californicus John Thomas Howell 1947-10-10 24188 Marin Alpine Lake Comment
  RSA127364  Amaranthus californicus J. T. Howell 1946-9-8 22998 Marin Lake Lagunitas, Mount Tamalpais Comment
  CDA3304  Amaranthus deflexus J. T. Howell 1944-7-23 19852 Marin San Rafael . Comment
  POM303725  Amaranthus deflexus J. T. Howell 1944-7-23 19852 Marin Along sidewalks, San Rafael. 15 Comment
  RSA40152  Amaranthus deflexus J. T. Howell 1944-7-23 19852 Marin Along sidewalks, San Rafael. 15 Comment
  UC1177309  Ambrosia psilostachya J. Thomas Howell 1944-9-24 20756 Marin e side of Bolinas Lagoon Comment
  UC421706  Ambrosia psilostachya John Thomas Howell 2189 Marin near San Rafael Comment
  CAS-BOT-BC142511  Amelanchier utahensis John Thomas Howell 1947-4-13 23056 Marin Tiburon Peninsula Comment
  UC1177237  Amelanchier utahensis John Thomas Howell 1941-6-29 16328 Marin Rock Spring; Mt. Tamalpais Comment
  RSA216165  Ammannia coccinea J. T. Howell 1959-11-4 35120 Marin Strand of reservoir 11 miles from Marshall on road to Petaluma Comment
  RSA0089643  Amsinckia intermedia J. T. Howell 1933-4-30 11199 Marin Phoenix Lake. Comment
  UCD119621  Amsinckia intermedia John Thomas Howell 1945-5-13 20863 Marin Deer Park near Fairfax. Comment
  HSC24625  Anagallis minima J. T. Howell 1945-6-12 20945 Marin Potrero Meadow; Mt. Tamalpais Comment
  UCD117408  Anagallis minima John Thomas Howell 1945-6-10 20945 Marin Potrero Meadow, Mt. Tamalpais. Comment
  CAS-BOT-BC137845  Andropogon glomeratus var. glomeratus John Thomas Howell 1947-8-31 24174 Marin Ridgecrest Road north of Alpine Lake. Comment
  UC1177023  Andropogon glomeratus var. pumilus John Thomas Howell 1939-10-15 Marin near Liberty Camp; near Liberty Camp Comment
  CAS-BOT-BC391878  Anemone grayi John Thomas Howell 1940-5-12 15413 Marin Lagunitas Creek Comment
  CAS-BOT-BC218487  Angelica hendersonii John Thomas Howell 1944-7-9 19704 Marin Inverness Ridge Comment
  CAS-BOT-BC137775  Anthoxanthum aristatum J. T. Howell 1945-5-9 20856 Marin Low field between Hamilton Field and Ignacio. Comment
  CDA1728  Anthoxanthum aristatum J. T. Howell 1945-5-9 20856 Marin Low field between Hamilton Field and Ignacio. 0 Comment
  SBBG54421  Anthoxanthum aristatum J. T. Howell 1945-5-9 20856 Marin between Hamilton Field and Ignacio Comment
  SEINET195203  Anthoxanthum aristatum J. T. Howell 1945-5-9 20856 Marin Between Hamilton Field and Ignacio Comment
  UCD56160  Anthoxanthum aristatum John Thomas Howell 1945-5-9 20856 Marin Low field between Hamilton Field and Ignacio. Comment
  CAS-BOT-BC280622  Anthoxanthum occidentale John Thomas Howell 1945-4-29 20781 Marin Fish Grade Comment
  CAS-BOT-BC392044  Aquilegia eximia John Thomas Howell 1944-7-7 19681 Marin Camp Handy, Mt. Tamalpais Comment
  UC1176742  Aquilegia eximia John Thomas Howell 1944-7-7 19681 Marin Camp Handy Mt. Tamalpais Comment
  CAS-BOT-BC27202  Arctostaphylos cushingiana f. repens John Thomas Howell 1944-3-26 19353 Marin Inverness Ridge west of Inverness Comment
  CAS-BOT-BC27203  Arctostaphylos cushingiana f. repens John Thomas Howell 1944-6-4 19537 Marin Inverness Ridge Comment
  CAS-BOT-BC23351  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1944-3-26 19356 Marin Pines west of Inverness Comment
  CAS-BOT-BC23354  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1944-4-13 19382 Marin Big Rock Ridge west of Hamilton Field Comment
  CAS-BOT-BC23355  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1946-5-16 21891 Marin Angel Island, N. side Comment
  CAS-BOT-BC23356  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1943-7-4 18272 Marin West of Inverness Comment
  CAS-BOT-BC23390  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1930-12-28 5721 Marin Slope of Mt. Tamalpais above Mill Valley. Comment
  CAS-BOT-BC23391  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1926-2-22 1642 Marin Inverness Ridge Comment
  CAS-BOT-BC23394  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1947-3-2 23036 Marin Above Blythedale Canyon, east side of Mt. Tamalpais Comment
  CAS-BOT-BC23395  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1939-7-2 14816 Marin Hills SW of Almonte Comment
  CAS-BOT-BC23396  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1970-5-17 46525 Marin Throckmorton Ridge, Mt. Tamalpais Comment
  CAS-BOT-BC23398  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1944-6-4 19538 Marin Inverness Ridge Comment
  CAS-BOT-BC23399  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1944-3-26 19355 Marin Inverness Ridge, west of Inverness Comment
  CAS-BOT-BC23400  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1944-3-26 19357 Marin Pines west of Inverness, Inverness Ridge. Comment
  CAS-BOT-BC24833  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1944-11-22 20768 Marin Inverness Ridge Comment
  SBBG28863  Arctostaphylos glandulosa subsp. cushingiana J. T. Howell 1933-3-19 10866 a Marin slopes at head of Muir Woods Comment
  SBBG41384  Arctostaphylos glandulosa subsp. cushingiana J. T. Howell 1943-3-7 17881 Marin hills NE of San Rafael Comment
  CAS-BOT-BC23190  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1927-8-22 3038 Marin Rocky slope on Rock Spring Trail, west of West Point, Mt. Tamalpais 548 Comment
  CAS-BOT-BC23216  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1930-7-20 5375 Marin Hills just north of Phoenix Lake Comment
  CAS-BOT-BC23219  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1926-2-28 1653 Marin Rock Spring Trail, Mt. Tamalpais Comment
  RSA1060  Arctostaphylos glandulosa subsp. glandulosa J. T. Howell 1927-8-22 676 Marin Rock Spring Trail, Mt Tamalpais 548 Comment
  RSA51267  Arctostaphylos glandulosa subsp. glandulosa J. T. Howell 1950-4-2 26307 Marin Inverness Ridge east of Mt. Vision, Pt. Reyes Peninsula. Comment
  RSA70837  Arctostaphylos hookeri subsp. montana J. T. Howell 1926-2-28 1655 Marin Mt. Tamalpais on south side. Comment
  CAS-BOT-BC24472  Arctostaphylos manzanita John Thomas Howell 1946-6-9 21996 Marin Near Inverness. Comment
  CAS-BOT-BC38753  Arctostaphylos manzanita subsp. manzanita John Thomas Howell 1943-3-7 17880 Marin Hills northeast of San Rafael Comment
  CAS-BOT-BC38522  Arctostaphylos montana subsp. montana John Thomas Howell 1927-8-27 3039 Marin On Rock Spring Trail, w. of West Point, Mt. Tamalpais. 548 Comment
  SBBG41170  Arctostaphylos montana subsp. montana J. T. Howell 1947-5-25 23200 Marin Simmons Trail, Mt Tamalpais Comment
  CAS-BOT-BC44695  Arctostaphylos sensitiva John Thomas Howell 1926-2-28 1657 Marin South side of Mt. Tamalpais Comment
  CAS-BOT-BC44696  Arctostaphylos sensitiva John Thomas Howell 1950-3-28 26306 Marin Mt. Tamalpais - near Mountain Home Comment
  CAS-BOT-BC46787  Arctostaphylos uva-ursi John Thomas Howell 1944-3-26 19350 Marin west of Ledum Swamp, Pt. Reyes Comment
  CAS-BOT-BC46788  Arctostaphylos uva-ursi John Thomas Howell 1943-7-4 18270 Marin near Ledum Marsh Comment
  CAS-BOT-BC46842  Arctostaphylos virgata John Thomas Howell 1944-4-2 19362 Marin Bolinas Ridge Comment
  POM273095  Arctostaphylos virgata J. T. Howell 1947-1-12 s.n. Marin Above Muir Woods, south side of Mt. Tamalpais. Comment
  UC1176773  Aristolochia californica John Thomas Howell 1945-5-13 20864 Marin Deer Park near Fairfax Comment
  CAS-BOT-BC82453  Arnica discoidea John Thomas Howell 1950-6-4 26621 Marin Blithedale Canyon, Mill Valley Comment
  RSA93384  Arrhenatherum elatius J. T. Howell 1947-6-4 23224 Marin San Geronimo. Comment
  CAS-BOT-BC146282  Arrhenatherum elatius var. elatius John Thomas Howell 1947-6-4 23224 Marin San Geronimo. Comment
  CAS-BOT-BC84932  Artemisia californica John Thomas Howell 1946-12-22 23034 Marin Greenbrae Hills Comment
  CAS-BOT-BC84933  Artemisia californica John Thomas Howell 1946-12-22 23034 Marin Steep southern slopes, Greenbrae Hills Comment
  POM273975  Artemisia californica J. T. Howell 1946-12-22 23034 Marin Greenbrea Hills. Comment
  CAS-BOT-BC90878  Artemisia pycnocephala John Thomas Howell 1948-6-6 24332 Marin Bolinas Bay Sand Spit Comment
  CAS-BOT-BC65795  Aspidotis californica John Thomas Howell 1943-1-1 17875 Marin Mt. Tamalpais Comment
  CAS-BOT-BC65860  Aspidotis carlotta-halliae John Thomas Howell 1967-3-5 42037 Marin near Rattlesnake Camp, Mt. Tamalpais Comment
  CAS-BOT-BC65861  Aspidotis carlotta-halliae John Thomas Howell 1967-3-5 42037 Marin near Rattlesnake Camp, Mt. Tamalpais Comment
  CAS-BOT-BC65888  Aspidotis densa John Thomas Howell 1930-4-20 4717 Marin 1 mile from Lagunitas on road to San Rafael Comment
  RSA216148  Aster chilensis J. T. Howell 1957-9-15 32956 Marin Richardson Bay Comment
  CAS-BOT-BC178302  Astragalus gambelianus John Thomas Howell 1946-5-12 21807 Marin Carson Ridge Comment
  CAS-BOT-BC186566  Astragalus nuttallii var. virgatus John Thomas Howell 1946-5-16 21868 Marin Angel Island, se. side Comment
  UC1177210  Astragalus nuttallii var. virgatus John Thomas Howell 1946-5-16 21868 Marin Angel Island Comment
  SEINET10775829  Astragalus pycnostachyus John Thomas Howell 1945-6-30 Howell 21253 Marin Stinson Beach. Comment
  CAS-BOT-BC193107  Astragalus pycnostachyus var. pycnostachyus John Thomas Howell 1945-8-19 21433 Marin At head of Drakes Bay Comment
  CAS-BOT-BC193108  Astragalus pycnostachyus var. pycnostachyus John Thomas Howell 1945-6-30 21253 Marin Stinson Beach Comment
  RSA110269  Astragalus pycnostachyus var. pycnostachyus J. T. Howell 1945-8-19 21433 Marin Head of Drakes Bay. Comment
  UC1177220  Astragalus pycnostachyus var. pycnostachyus John Thomas Howell 1939-6-4 Marin on road to Pt. Reyes head of Drake's Bay on road to Pt. Reyes, head of Drake's Bay Comment
  CAS-BOT-BC68118  Athyrium filix-femina subsp. cyclosorum John Thomas Howell 1950-10-11 27468 Marin Bear Valley Comment
  CAS-BOT-BC68119  Athyrium filix-femina subsp. cyclosorum John Thomas Howell 1950-10-11 27467 A Marin Bear Valley Comment
  CAS-BOT-BC69455  Athyrium filix-femina subsp. cyclosorum John Thomas Howell 1943-7-4 18258 Marin Ledum Swamp on road to Pt. Reyes. Comment
  CAS-BOT-BC68120  Athyrium filix-femina subsp. cyclosorum John Thomas Howell 1944-7-9 19693 Marin Sunny open bog, Inverness Ridge Comment
  CAS-BOT-BC68121  Athyrium filix-femina subsp. cyclosorum John Thomas Howell 1957-7-22 32819 Marin Pt. Reyes Peninsula near Drakes Bay Comment
  RSA127256  Athyrium filix-femina subsp. cyclosorum J. T. Howell 1950-10-11 27467 Marin Bear Valley Comment
  UC1106144  Atriplex californica John Thomas Howell 1944-9-10 20734 Marin n Inverness (Shell Beach); n of Inverness, Shell Beach Comment
  RSA126237  Atriplex patula J. T. Howell 1945-9-13 s.n. Marin Drakes Estero Comment
Read comments
Jan 30 2008
  SBBG29936  Atriplex semibaccata J. T. Howell 1943-11-21 19338 Marin W of San Quentin near Greenbrae Comment
  UC1176804  Atriplex semibaccata John Thomas Howell 1944-6-25 19667 Marin between McNear's Landing and San Rafael; between McNear's Landing and San Rafael Comment
  UC710624  Atriplex semibaccata John Thomas Howell 1943-11-21 19338 Marin Salt marshes w San Quentin (near Greenbrae); , w of San Quentin Comment
  RSA478405  Atriplex semibaccata J. T. Howell 1943-11-21 19338 Marin Salt marshes west of San Quentin near Greenbrae. Comment
  UCD97701  Atriplex semibaccata John Thomas Howell 1943-11-21 19338 Marin west of San Quentin, near Greenbrae. Comment
  CAS-BOT-BC175916  Avena fatua John Thomas Howell 1985-7-6 s.n. Marin Vallecito School yard, Terra Linda Comment
  UC1177515  Azolla filiculoides John Thomas Howell 1946-6-30 22170 Marin Rodeo Lagoon Comment
  POM203149  Baccharis pilularis J. T. Howell 1933-10-8 11702 Marin Pt. Reyes Peninsula Comment
  POM203150  Baccharis pilularis J. T. Howell 1933-10-8 11702 Marin Point Reyes Peninsula Comment
  CAS-BOT-BC16450  Barbarea orthoceras John Thomas Howell 1947-4-2 s.n. Marin Mill Valley. Comment
  CAS-BOT-BC16451  Barbarea orthoceras John Thomas Howell 1947-5-8 s.n. Marin Sausalito. Comment
  CAS-BOT-BC16454  Barbarea orthoceras John Thomas Howell 1950-3-28 26305 Marin Point Reyes Peninsula on raod to lighthouse. Comment
  CAS-BOT-BC16455  Barbarea orthoceras John Thomas Howell 1975-6-29 51325 Marin Kentfield. Roadside, Goodhill and Diablo Roads. Comment
  UC1177249  Barbarea orthoceras John Thomas Howell 1946-5-12 21794 Marin Carson Ridge Comment
  CAS-BOT-BC75820  Berberis pinnata John Thomas Howell 1926-2-21 1632 Marin Point Reyes. Comment
  CAS-BOT-BC27856  Blennosperma nanum var. robustum John Thomas Howell 1947-5-14 23153 Marin Pt. Reyes Peninsula above McClure Beach Comment
  CAS-BOT-BC27857  Blennosperma nanum var. robustum John Thomas Howell 1947-5-14 23153 Marin Pt. Reyes Peninsula above McClure Beach Comment
  CAS-BOT-BC27858  Blennosperma nanum var. robustum John Thomas Howell 1947-5-14 23153 Marin Pt. Reyes Peninsula above McClure Beach Comment
  NY162681  Blennosperma nanum var. robustum J. T. Howell 1947-5-14 23153 Marin Point Reyes Peninsula above McClure Beach Comment
  RSA0000972  Blennosperma nanum var. robustum J. T. Howell 1947-5-14 23153 Marin Point Reyes Peninsula above McClure Beach. Comment
  RSA31367  Boisduvalia densiflora var. densiflora J. T. Howell 1944-6-25 19654 Marin Santa Venetia. Comment
  RSA31368  Boisduvalia densiflora var. densiflora J. T. Howell 1946-6-23 22124 Marin Carson Ridge Comment
  RSA31366  Boisduvalia stricta J. T. Howell 1942-6-12 16984 Marin Carson Ridge Comment
  CAS-BOT-BC7646  Bolboschoenus maritimus John Thomas Howell 1945-8-19 21437 Marin Head of Drakes Bay. Comment
  CAS-BOT-BC7648  Bolboschoenus maritimus John Thomas Howell 1945-9-16 21493 Marin Near San Rafael. Comment
  UC1176792  Bolboschoenus maritimus John Thomas Howell 1945-9-16 21493 Marin Near San Rafael. Comment
  UC1106078  Bolboschoenus maritimus John Thomas Howell 1945-8-19 21438 Marin At head of Drakes Bay. Comment
  CAS-BOT-BC95307  Bowlesia incana John Thomas Howell 1947-4-30 23111 Marin Dillons Beach Comment
  CAS-BOT-BC95308  Bowlesia incana John Thomas Howell 1944-5-14 19465 Marin Salmon Creek Canyon Comment
  CAS-BOT-BC420285  Boykinia occidentalis John Thomas Howell 1947-6-15 s.n. Marin Side canyon to Bootjack Canyon, Mt. Tamalpais Comment
  CAS-BOT-BC145420  Brachypodium distachyon John Thomas Howell 1947-5-21 23186 Marin Tiburon. Comment
  CAS-BOT-BC145421  Brachypodium distachyon John Thomas Howell 1966-6-9 41563 Marin Just north of the John Thomas Howell Botanical Garden, Tiburon. Comment
  CAS-BOT-BC145423  Brachypodium distachyon John Thomas Howell 1948-5-31 24327 Marin Common Devils Gulch near Camp Taylor. Comment
  CAS-BOT-BC29991  Brassica juncea John Thomas Howell 1950-6-4 26619 Marin Mill Valley. Blithedale Canyon. Comment
  CAS-BOT-BC30258  Brassica nigra John Thomas Howell 1943-6-6 18196 Marin Between Mill Valley and Muir Woods. Comment
  CAS-BOT-BC30259  Brassica nigra John Thomas Howell 1939-5-21 14691 Marin West side of Tiburon Peninsula. Comment
  CAS-BOT-BC145475  Briza maxima John Thomas Howell 1941-5-25 16223 Marin Mount Tamalpais. Potrero Meadows. Comment
  CAS-BOT-BC145559  Briza minor John Thomas Howell 1934-4-1 11808 Marin Ross. Comment
  UC1177117  Briza minor John Thomas Howell 1942-6-7 Marin San Anselmo Canyon Comment
  CAS-BOT-BC484229  Brodiaea elegans subsp. elegans John Thomas Howell 1966-6-9 s.n. Marin John Thomas Howell Botanical Garden, Tiburon Comment
  RSA126464  Bromus carinatus J. T. Howell 1941-8-25 s.n. Marin Mt. Tamalpais Comment
  UCD58205  Bromus carinatus John Thomas Howell 1955-5-13 30149 Marin Sidewalk parking near East Blithedale Ave. at Park School. Mill Valley. Comment
  CAS-BOT-BC149202  Bromus carinatus var. carinatus John Thomas Howell 1959-11-4 35114 Marin Shore of Bolinas Lagoon north of Stinson Beach. Comment
  CAS-BOT-BC149205  Bromus carinatus var. carinatus John Thomas Howell 1947-5-8 23141 Marin Sausalito. Comment
  CAS-BOT-BC149215  Bromus carinatus var. carinatus John Thomas Howell 1958-6-28 33636 Marin Mount Tamalpais. South side of Alpine Lake. Comment
  CAS-BOT-BC149220  Bromus carinatus var. carinatus John Thomas Howell 1945-7-4 21275 Marin Inverness. Comment
  CAS-BOT-BC149221  Bromus carinatus var. carinatus John Thomas Howell 1944-6-4 19544 Marin Inverness Ridge west of Inverness. Comment
  CAS-BOT-BC149223  Bromus carinatus var. carinatus John Thomas Howell 1945-5-9 20838 Marin Between Hamilton Field and Ignacio. Comment
  CAS-BOT-BC149242  Bromus carinatus var. carinatus John Thomas Howell 1941-5-25 16219 Marin Mount Tamalpais. Rifle Camp. Comment
  CAS-BOT-BC149244  Bromus carinatus var. carinatus John Thomas Howell 1955-5-13 30149 Marin Sidewalk parking near East Blithedale Avenue at Park School, Mill Valley. Comment
  CAS-BOT-BC149245  Bromus carinatus var. carinatus John Thomas Howell 1943-6-6 18215 Marin Railroad grade above Muir Woods. Comment
  UC1177018  Bromus carinatus var. carinatus John Thomas Howell 1947-5-8 23141 Marin Sausalito Comment
  UC1177020  Bromus carinatus var. carinatus John Thomas Howell 1943-6-6 18201 Marin between Mill Valley and Muir Woods Comment
  CAS-BOT-BC148906  Bromus carinatus var. marginatus John Thomas Howell 1944-6-4 s.n. Marin Inverness Ridge. Comment
  CAS-BOT-BC148909  Bromus carinatus var. marginatus John Thomas Howell 1948-5-31 24326 Marin Devils Gulch near Camp Taylor. Comment
  SEINET935035  Bromus carinatus var. marginatus John Thomas Howell 1955-1 30149 Marin Sidewalk Parking near E. Blithedale Ave. at Park School, Mill Valley Comment
  CAS-BOT-BC156286  Bromus catharticus John Thomas Howell 1959-11-4 35108 Marin In west part of Frank Valley. Comment
  CAS-BOT-BC155834  Bromus catharticus var. elatus John Thomas Howell 1969-5-5 45565 Marin Tiburon. Railroad yards. Comment
  CAS-BOT-BC155936  Bromus commutatus John Thomas Howell 1944-5-28 19520 Marin Almonte. Comment
  CAS-BOT-BC156101  Bromus diandrus John Thomas Howell 1966-4-6 41474 Marin Tiburon. John Thomas Howell Botanical Garden. Comment
  CAS-BOT-BC156103  Bromus diandrus John Thomas Howell 1946-6-16 22072 Marin Inverness Peak. Comment
  CAS-BOT-BC155011  Bromus hordeaceus John Thomas Howell 1941-5-25 s.n. Marin Mount Tamalpais. West Point. Comment
  CAS-BOT-BC155025  Bromus hordeaceus John Thomas Howell 1938-6-19 13913 Marin Mount Tamalpais. Zigzag Fire Trail. Comment
  CAS-BOT-BC155378  Bromus hordeaceus John Thomas Howell 1945-5-27 20885 Marin Mount Tamalpais. Northeast of Mountain Theater. Comment
  CAS-BOT-BC155379  Bromus hordeaceus John Thomas Howell 1950-5-25 s.n. Marin Mount Tamalpais. Rifle Camp. Comment
  CAS-BOT-BC155380  Bromus hordeaceus John Thomas Howell 1943-5-9 s.n. Marin San Raphael. Comment
  UC1177013  Bromus hordeaceus John Thomas Howell 1945-5-6 Marin San Raphael Hills Comment
  CAS-BOT-BC162431  Bromus laevipes John Thomas Howell 1944-6-18 19629 Marin Mount Tamalpais. Fish Grade between Phoenix and Lagunitas Lakes. Comment
  CAS-BOT-BC162433  Bromus laevipes John Thomas Howell 1941-5-25 16206 Marin Mount Tamalpais. Arturo Trail. Comment
  CAS-BOT-BC162436  Bromus laevipes John Thomas Howell 1941-6-29 16336 Marin Between Rock Spring and Laurel Dam, Mount Tamalpais. Comment
  RSA126465  Bromus laevipes J. T. Howell 1945-6-12 s.n. Marin White Hill Comment
  UC1177016  Bromus laevipes John Thomas Howell 1944-6-18 19629 Marin Mount Tamalpais, Fish Grade, Phoenix to Lake Lagunitas Fish Grade; Mount Tamalpais, Fish Grade Comment
  CAS-BOT-BC162327  Bromus madritensis John Thomas Howell 1947-4-27 23096 Marin Bald Mountain west of San Anselmo. Comment
  CAS-BOT-BC162328  Bromus madritensis John Thomas Howell 1946-5-16 21872 Marin Angel Island. South side. Comment
  CAS-BOT-BC162329  Bromus madritensis John Thomas Howell 1947-4-27 23096 Marin Bald Mountain west of San Anselmo. Comment
  CAS-BOT-BC162330  Bromus madritensis John Thomas Howell 1969-5-5 45571 Marin Tiburon Peninsula. Ring Hill. Comment
  CAS-BOT-BC162333  Bromus madritensis John Thomas Howell 1946-5-16 21872 Marin Angel Island, south side. Comment
  CDA1831  Bromus madritensis J. T. Howell 1947-4-27 23096 Marin Bald Mt. west of San Anselmo. 0 Comment
  RSA51275  Bromus madritensis J. T. Howell 1947-4-27 23096 Marin Bald Mt. west of San Anselmo Comment
  UC1106207  Bromus madritensis subsp. madritensis John Thomas Howell 1944-4-16 19390 Marin Mount Tamalpais, Corte Madera Ridge Corte Madera Ridge; Mount Tamalpais, Corte Madera Ridge Comment
  CAS-BOT-BC162252  Bromus maritimus John Thomas Howell 1946-6-30 22147 Marin Rodeo Lagoon. Comment
  CAS-BOT-BC162254  Bromus maritimus John Thomas Howell s.n. Marin Dillons Beach. Comment
  CAS-BOT-BC161851  Bromus rubens John Thomas Howell 1945-5-6 20811 Marin San Rafael Hills. Comment
  CAS-BOT-BC161853  Bromus rubens John Thomas Howell 1944-5-28 19515 Marin Between Manzanita and Almonte. Comment
  UC1177017  Bromus secalinus John Thomas Howell 1945-6-24 21245 Marin Mount Tamalpais, Lagunitas Meadows Lagunitas Meadows; Mount Tamalpais, Lagunitas Meadows Comment
  RSA98048  Bromus stamineus J. T. Howell 1953-7-5 29105 Marin East Peak, Mt. Tamalpias Comment
  CAS-BOT-BC161647  Bromus sterilis John Thomas Howell 1955-5-13 30150 Marin Shell Beach. Comment
  CAS-BOT-BC161396  Bromus tectorum John Thomas Howell 1945-6-3 20940 Marin Shell Beach. Comment
  CAS-BOT-BC161398  Bromus tectorum John Thomas Howell 1944-5-28 19514 Marin Between Manzanita and Almonte. Comment
  CAS-BOT-BC185510  Bromus vulgaris John Thomas Howell 1945-6-30 21249 Marin Steep Ravine. Mount Tamalpais. Comment
  CAS-BOT-BC185511  Bromus vulgaris John Thomas Howell 1943-5-30 18189 Marin Rifle Camp, Mount Tamalpais. Comment
  CAS-BOT-BC185513  Bromus vulgaris John Thomas Howell 1945-6-24 s.n. Marin Mount Tamalpais. Rock Spring to Laurel Dell. Comment
  RSA126469  Bromus vulgaris J. T. Howell 1945-7-4 21268 Marin California Academy of Sciences; Inverness Ridge Comment
  CAS-BOT-BC36856  Cakile edentula var. edentula John Thomas Howell 1926-11-21 2256 Marin Bolinas. Comment
  JEPS30760  Cakile maritima John Thomas Howell 1943-10-3 19333 Marin just above high tide line Muir Beach Comment
  CDA62  Cakile maritima J. T. Howell 1943-10-3 19333 Marin Muir Beach. Comment
  UCD114949  Cakile maritima John Thomas Howell 1943-10-3 19333 Marin Above high tide line, Muir Beach. Comment
  CAS-BOT-BC185230  Calamagrostis koelerioides John Thomas Howell 1948-5-22 24307 Marin Mount Tamalpais. Firetrail north of East Peak. Comment
  CAS-BOT-BC185233  Calamagrostis koelerioides John Thomas Howell 1949-6-26 25352 A Marin Mount Tamalpais. Firetrail north of East Peak. Comment
  CAS-BOT-BC185174  Calamagrostis nutkaensis John Thomas Howell 1943-6-13 18229 Marin Sausalito Hills. Comment
  CAS-BOT-BC185175  Calamagrostis nutkaensis John Thomas Howell 1943-6-13 18229 Marin Sausalito Hills. Comment
  UC1177127  Calamagrostis nutkaensis John Thomas Howell 1943-7-4 18248 Marin Ledum Swamp; on road to Pt. Reyes Comment
  CAS-BOT-BC185102  Calamagrostis ophitidis John Thomas Howell 1940-5-15 18070 Marin Tiburon Peninsula. Comment
  CAS-BOT-BC185104  Calamagrostis ophitidis John Thomas Howell 1939-5-21 14695 Marin South end of Tiburon Peninsula. Comment
  RSA126404  Calamagrostis ophitidis J. T. Howell 1945-5-27 20878 a Marin Mount Tamalpais Comment
  UC1177126  Calamagrostis ophitidis John Thomas Howell 1940-5-15 18070 Marin Tiburon Peninsula Comment
  CAS-BOT-BC185020  Calamagrostis rubescens John Thomas Howell 1945-8-12 21377 Marin Mill Valley, Cascade Canyon. Comment
  CAS-BOT-BC185021  Calamagrostis rubescens John Thomas Howell 1946-9-15 23004 Marin Mount Tamalpais. Near Willow Meadow. Comment
  CAS-BOT-BC185026  Calamagrostis rubescens John Thomas Howell 1945-8-12 21377 Marin Mill Valley, Cascade Canyon. Comment
  SEINET199908 Image available Calamagrostis rubescens John Thomas Howell 1949-6-26 25352 A Marin Fire trail north of East Peak. Mt. Tamalpais. Comment
  CAS-BOT-BC184997  Calamagrostis stricta subsp. inexpansa John Thomas Howell 1949-5-25 25338 Marin Point Reyes Peninsula. Behind dunes. Comment
  UC1177128  Calamagrostis stricta subsp. inexpansa John Thomas Howell 1949-5-25 25338 Marin Pt. Reyes Peninsula; grassy flat behind dunes Comment
  UC927238  Calamagrostis stricta subsp. inexpansa John Thomas Howell 1947-6-4 1412 Marin swale near radio station; Point Reyes Peninsula Comment
  CAS-BOT-BC233956  Calandrinia breweri John Thomas Howell 1927-4-23 2343 Marin Between Mill Valley and Muir Woods along road 228 Comment
  CAS-BOT-BC233957  Calandrinia breweri John Thomas Howell 1946-5-12 21801 Marin Carson Ridge Comment
  CAS-BOT-BC233958  Calandrinia breweri John Thomas Howell 1943-4-11 17914 Marin Black Canyon, San Rafael hills Comment
  CAS-BOT-BC438424  Calandrinia ciliata John Thomas Howell 1946-4-13 21605 Marin Near Rock Spring, Mt. Tamalpais Comment
  CAS-BOT-BC132575  Calochortus uniflorus John Thomas Howell 1945-4-29 20783 Marin Lagunitas Meadows Comment
  UC1177315  Calycadenia multiglandulosa J. Thomas Howell 1946-6-20 22109 Marin 4 mi s Olema Comment
  CAS-BOT-BC436396  Calystegia John Thomas Howell 1947-5-21 23192 Marin Tiburon Comment
  CAS-BOT-BC436390  Calystegia collina subsp. collina John Thomas Howell 1940-5-12 15433 Marin South end of Carson Ridge Comment
  UCD126376  Calystegia occidentalis John Thomas Howell 1947-5-8 23140 Marin Sausalito. Comment
  SBBG41056  Calystegia occidentalis subsp. occidentalis J. T. Howell 1947-5-8 23137 Marin Sausalito Comment
  CAS-BOT-BC436398  Calystegia occidentalis subsp. occidentalis John Thomas Howell 1946-5-16 21897 Marin Angel Island, east side Comment
  CAS-BOT-BC436400  Calystegia occidentalis subsp. occidentalis John Thomas Howell 1946-6-20 23138 Marin Sausalito Comment
  CAS-BOT-BC436401  Calystegia occidentalis subsp. occidentalis John Thomas Howell 1946-6-20 22112 Marin 2 miles S of Olema Comment
  CAS-BOT-BC215883  Calystegia purpurata subsp. purpurata John Thomas Howell 1947-5-4 23127 Marin San Rafael Hills Comment
  CAS-BOT-BC215886  Calystegia purpurata subsp. purpurata John Thomas Howell 1940-5-26 15531 Marin Little Carson Falls Comment
  CAS-BOT-BC215887  Calystegia purpurata subsp. purpurata John Thomas Howell 1946-5-12 21786 Marin Carson Ridge Comment
  CAS-BOT-BC215888  Calystegia purpurata subsp. purpurata John Thomas Howell 1946-6-16 22070 Marin Inverness Park Comment
  CAS-BOT-BC215889  Calystegia purpurata subsp. purpurata John Thomas Howell 1939-7-2 s.n. Marin Elk Valley Comment
  CAS-BOT-BC215890  Calystegia purpurata subsp. purpurata John Thomas Howell 1939-7-2 s.n. Marin Near Big Lagoon Comment
  CAS-BOT-BC215891  Calystegia purpurata subsp. purpurata John Thomas Howell 1947-5-8 23140 Marin Sausalito Comment
  CAS-BOT-BC215893  Calystegia purpurata subsp. purpurata John Thomas Howell 1925-4-5 895 Marin Pipeline Trail Comment
  CAS-BOT-BC436406  Calystegia subacaulis John Thomas Howell 1946-5-25 21935 Marin Greenbrae HIlls Comment
  CAS-BOT-BC436407  Calystegia subacaulis John Thomas Howell 1947-5-21 23193 Marin Tiburon Comment
  CAS-BOT-BC436403  Calystegia subacaulis John Thomas Howell 1939-5-21 s.n. Marin W. Tiburon Comment
  CAS-BOT-BC436408  Calystegia subacaulis John Thomas Howell 1946-5-16 s.n. Marin W. Angel Island Comment
  CAS-BOT-BC497595  Camassia quamash subsp. linearis John Thomas Howell 1946-4-21 21679 Marin Swale near radio station, Pt. Reyes Peninsula Comment
  RSA31407  Camissonia cheiranthifolia subsp. cheiranthifolia J. T. Howell 1945-6-3 20939 Marin Shell Beach near Inverness Comment
  CAS-BOT-BC160263  Camissoniopsis cheiranthifolia subsp. cheiranthifolia John Thomas Howell 1945-6-30 s.n. Marin Stinson Beach Comment
  RSA88329  Campanula angustiflora J. T. Howell 1946-5-12 21818 Marin Carson Country Comment
  UC1042536  Campanula angustiflora John Thomas Howell 1946-5-12 21818 Marin Carson country Comment
  RSA88330  Campanula angustiflora J. T. Howell 1946-6-2 21975 Marin Rocky Ridge Fire Trail, Mt. tamalpais. Comment
  RSA88331  Campanula griffinii J. T. Howell 1946-5-12 21813 Marin Carson Country Comment
  RSA88332  Campanula griffinii J. T. Howell 1946-7-7 22198 Marin South of Barths Retreat, Mt. Tamalpais. Comment
  CAS-BOT-BC37472  Cardamine californica John Thomas Howell 1939-4-23 14612 Marin Mount Tamalpais. Corte Madera Ridge. Comment
  UC1177253  Cardamine californica var. integrifolia John Thomas Howell 1949-4-6 25297 Marin Ignacio Comment
  UC1106256  Cardamine oligosperma John Thomas Howell 1939-5-28 Marin road to Inverness (near head Drake's Bay); near head Drake's Bay Comment
  UC1177258  Cardaria draba John Thomas Howell 1945-9-16 21487 Marin n of San Rafael Comment
  UC1177452  Cardionema ramosissimum John Thomas Howell 1945-6-3 20915 Marin near Inverness Comment
  CAS-BOT-BC281718  Carduus pycnocephalus John Thomas Howell 1946-5-4 21754 Marin Along Redwood Highway near Burdell Comment
  UCD85581  Carduus pycnocephalus John Thomas Howell 1946-5-4 21754 Marin along Redwood Highway near Burdell. Comment
  CAS-BOT-BC281719  Carduus pycnocephalus John Thomas Howell 1949-4-27 25308 Marin Bluffs S of Tomales Comment
  POM273083  Carduus pycnocephalus J. T. Howell 1946-5-4 21754 Marin Along Redwood Highway near Burdell Comment
  UC905050  Carex John Thomas Howell 1945-6-24 21240 Marin Willow Meadow Mt. Tamalpais Comment
  CAS-BOT-BC19682  Carex athrostachya John Thomas Howell 1946-6-13 22025 Marin Chileno Valley. Comment
  CAS-BOT-BC19683  Carex athrostachya John Thomas Howell 1946-6-13 22025 Marin Chileno Valley. Comment
  CAS-BOT-BC19254  Carex barbarae John Thomas Howell 1966-4-18 41506 Marin Tiburon. Gully just north of John Thomas Howell Botanical Garden. Comment
  CAS-BOT-BC19454  Carex bolanderi John Thomas Howell 1944-6-4 19539 Marin Inverness Ridge west of Inverness. Comment
  CAS-BOT-BC19457  Carex bolanderi John Thomas Howell 1943-7-11 18282 Marin Mt Tamalpais. Potrero Meadows. Comment
  CAS-BOT-BC19455  Carex bolanderi John Thomas Howell 1944-7-7 s.n. Marin Mt Tamalpais. Fish Grade. Comment
  CAS-BOT-BC19456  Carex bolanderi John Thomas Howell 1944-7-2 s.n. Marin Mt Tamalpais. Nothside trail near Collier Springs. Comment
  CAS-BOT-BC34028  Carex brevicaulis John Thomas Howell 1944-4-2 19359 Marin Bolinas Ridge. Comment
  CAS-BOT-BC34031  Carex brevicaulis John Thomas Howell 1946-5-4 21727 Marin Near Dillons Beach. Comment
  CAS-BOT-BC34034  Carex brevicaulis John Thomas Howell 1946-4-21 21683 Marin Near radio station, Pt. Reyes Peninsula. Comment
  CAS-BOT-BC34036  Carex brevicaulis John Thomas Howell 1946-5-16 21850 Marin Angel Island, southeast side. Comment
  CAS-BOT-BC34037  Carex brevicaulis John Thomas Howell 1944-3-26 19345 Marin Inverness Ridge. Above Ledum Swamp. Comment
  CAS-BOT-BC34039  Carex brevicaulis John Thomas Howell 1946-4-21 21683 Marin Down near radio station. Pt. Reyes Peninsula. Comment
  CAS-BOT-BC34040  Carex brevicaulis John Thomas Howell 1939-5-28 7380 Marin Pt. Reyes Lighthouse. Comment
  CAS-BOT-BC34074  Carex brevicaulis John Thomas Howell 1938-6-19 13925 Marin Head of Steep Ravine, Mt. Tamalpais. Comment
  CAS-BOT-BC34030  Carex brevicaulis John Thomas Howell 1947-4-2 23053 Marin Laguna Ranch, Drakes Bay. Comment
  RSA0079892  Carex brevicaulis John Thomas Howell 1946-5-4 21727 Marin Near Dillons Beach. Comment
  RSA52267  Carex buxbaumii J. T. Howell 1947-6-4 s.n. Marin Near radio station, Point Reyes Peninsula Comment
  CAS-BOT-BC34392  Carex cusickii John Thomas Howell 1943-7-11 18283 Marin Potrero Meadows, Mt. Tamalpais. Comment
  UC710506  Carex cusickii John Thomas Howell 1943-7-11 18283 Marin Potrero Meadows Mt. Tamalpais, Potrero Meadows Comment
  CAS-BOT-BC34389  Carex cusickii John Thomas Howell 1949-5-25 25330 Marin Marsh near radio station, Pt. Reyes Peninsula. Comment
  SD72057  Carex cusickii John Thomas Howell 1958-6-28 33641 Marin Mount Tamalpais; wet part of Willow Meadow. Comment
  CAS-BOT-BC35002  Carex densa John Thomas Howell 1937-6-13 13054 Marin Bolinas. Comment
  CAS-BOT-BC35003  Carex densa John Thomas Howell 1938-6-5 13903 Marin Rock Spring, Mt. Tamalpais. Comment
  CAS-BOT-BC35012  Carex densa John Thomas Howell; J. W. Stacey 1936-6-7 12659 Marin Mill Valley. Comment
  CAS-BOT-BC35042  Carex densa John Thomas Howell 1946-6-16 s.n. Marin Inverness Park. Comment
  POM248593  Carex densa J. T. Howell 1938-5-22 13790 Marin San Anselmo Canyon. Comment
  SEINET3900145  Carex densa John Thomas Howell 1938-6-5 13903 Marin Rock Spring, Mt. Tamalpais.; 0 Comment
  UC824432  Carex densa John Thomas Howell 1938-6-5 13903 Marin Rock Spring Mt. Tamalpais, Rock Spring Comment
  UC904991  Carex densa John Thomas Howell 1944-4-23 19401 Marin hills SE of Kentfield Comment
  UC904992  Carex densa John Thomas Howell 1945-5-6 Marin San Rafael, near Dominican College Comment
  UC904993  Carex densa John Thomas Howell 1945-5-2 17935 Marin Big Carson Canyon Comment
  CAS-BOT-BC35013  Carex densa John Thomas Howell; J. W. Stacey 1936-6-7 12637 Marin Olema. Comment
  CAS-BOT-BC83517  Carex densa John Thomas Howell 1986-4-23 s.n. Marin San Rafael. Nova Albion Way near Golden Hinde Blvd.. Above Sears. Comment
  RSA52311  Carex densa J. T. Howell 1944-4-23 19401 Marin Hills southeast of Kentfield. Comment
  CAS-BOT-BC19895  Carex echinata subsp. phyllomanica John Thomas Howell 1943-7-4 18255 Marin Ledum Swamp on road to Pt. Reyes. Comment
  CAS-BOT-BC19896  Carex echinata subsp. phyllomanica John Thomas Howell 1949-5-25 25331 Marin Marsh near radio station, Pt. Reyes Peninsula. Comment
  CAS-BOT-BC19955  Carex exsiccata John Thomas Howell 1946-6-13 22032 Marin Chileno Valley. Comment
  CAS-BOT-BC19956  Carex exsiccata John Thomas Howell 1946-6-13 22032 Marin Chileno Valley. Comment
  CAS-BOT-BC19959  Carex exsiccata John Thomas Howell 1943-7-11 18284 Marin Mt. Tamalpais. Potrero Meadows. Comment
  CAS-BOT-BC20882  Carex globosa John Thomas Howell 1946-5-14 21843 Marin Potrero Meadow, Mt. Tamalpais. Comment
  CAS-BOT-BC20896  Carex globosa John Thomas Howell 1944-5-21 19491 Marin Lagunitas Meadows. Mt. Tamalpais. Comment
  CAS-BOT-BC20897  Carex globosa John Thomas Howell 1945-6-3 20932 Marin Shell Beach. Comment
  RSA550627  Carex globosa J. T. Howell 1944-4-2 19368 A Marin Southeast of Laurel Del, Mount Tamalpais Comment
Read comments
May 31 2010
  CAS-BOT-BC20883  Carex globosa John Thomas Howell 1952-5-30 28318 Marin Potrero Meadow, Mt. Tamalpais. Comment
  SEINET12403814  Carex globosa J. T. Howell 1946-5-14 21843 Marin Portrero Meadow, Mt. Tamalpais. Comment
  SEINET3901320  Carex globosa John Thomas Howell 1945-6-3 20932 Marin Shell Beach, CA.; 0 Comment
  SEINET7559869 Image available Carex globosa John Thomas Howell 1944-4-2 19368 A Marin Southeast of Laurel Del, Mt Tamalpais. Comment
  SEINET7559872 Image available Carex globosa John Thomas Howell 1952-5-30 28318 Marin Potrero Meadow, Mt. Tamalpais. Comment
  SEINET7559896 Image available Carex globosa John Thomas Howell 1933-4-30 11193 Marin North side of Mt. Tamalpais. Comment
  CAS-BOT-BC28385  Carex gracilior John Thomas Howell 1943-4-11 17898 Marin Black Canyon, San Rafael Hills. Comment
  CAS-BOT-BC28388  Carex gracilior John Thomas Howell; J. W. Stacey 1936-6-7 12634 Marin Woodacre Comment
  CAS-BOT-BC28386  Carex gracilior John Thomas Howell 1944-4-23 19403 Marin Edge of salt marsh, hills of Kentfield Comment
  CAS-BOT-BC28387  Carex gracilior John Thomas Howell 1945-5-9 20849 Marin Ignacis Comment
  CAS-BOT-BC146563  Carex gynodynama John Thomas Howell 1945-6-24 21240 Marin Willow Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC146589  Carex gynodynama John Thomas Howell 1946-5-4 21728 Marin Near Dillons Beach Comment
  RSA88783  Carex gynodynama J. T. Howell, J. W. Stacey 1936-6-7 12640 Marin Ledum Swamp on road to Point Reyes. Comment
  RSA51939  Carex gynodynama J. T. Howell 1947-5-25 23202 Marin Willow Meadow, Mt. Tamalpais. Comment
  RSA52315  Carex harfordii J. T. Howell 1944-5-28 19523 Marin Between Almonte and Mill Valley. Comment
  UC710451  Carex harfordii John Thomas Howell 1943-7-4 18266 Marin near Ledum Swamp; Pt. Reyes Peninsula Comment
  CAS-BOT-BC21123  Carex leptalea John Thomas Howell 1943-7-4 18254 Marin Ledum Swamp on road to Pt. Reyes. Comment
  RSA78557  Carex leptalea J. T. Howell 1943-7-4 18254 Marin Ledum Swamp on road to Point Reyes, Point Reyes Peninsula. Comment
  UC710443  Carex leptalea John Thomas Howell 1943-7-4 18254 Marin on road to Point Reyes; Ledum Swamp Comment
  CAS-BOT-BC31609  Carex luzulina var. ablata John Thomas Howell 1938-6-5 13896 Marin Mt. Tamalpais, Azalea Flat. Comment
  CAS-BOT-BC31589  Carex luzulina var. luzulina John Thomas Howell 1945-8-19 21422 Marin Near Ledum Swamp. Comment
  CAS-BOT-BC31588  Carex luzulina var. luzulina John Thomas Howell 1952-6-3 28320 Marin Swampy place near radio station, Pt. Reyes Peninsula. Comment
  UC905030  Carex lyngbyei John Thomas Howell 1949-5-22 25323 Marin Salt Marsh 1 mi s Inverness Comment
  CAS-BOT-BC146620  Carex mendocinensis John Thomas Howell 1940-5-26 15535 Marin Little Carson Falls Comment
  CAS-BOT-BC146623  Carex mendocinensis John Thomas Howell; J. W. Stacey 1936-6-7 12658 Marin Near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC146627  Carex mendocinensis John Thomas Howell; J. W. Stacey 1936-6-7 12658 Marin Near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC146638  Carex mendocinensis John Thomas Howell 1942-7-12 17020 Marin Potrero Meadow, Mt. Tamalpais Comment
  UC583255  Carex mendocinensis John Thomas Howell, J. W. Stacey 1936-6-7 Marin Near Bootjack, Mount Tamalpais. Comment
  CAS-BOT-BC146631  Carex mendocinensis John Thomas Howell 1967-5-5 42168 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC146633  Carex mendocinensis John Thomas Howell 1945-4-29 20789 Marin Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC539841  Carex mendocinensis John Thomas Howell 1945-6-24 21241 Marin Willow Meadow, Mt. Tamalpais Comment
  RSA0014199  Carex mendocinensis J. T. Howell 1945-4-29 20789 Marin Camp Handy. Comment
  RSA0014501  Carex mendocinensis J. T. Howell, J. W. Stacey 1936-6-7 12658 Marin Serpentine area near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC119526  Carex nudata John Thomas Howell 1938-6-5 13899 Marin Near Bootjack, Mt. Tamalpais. Comment
  CAS-BOT-BC119527  Carex nudata John Thomas Howell 1945-8-29 20788 Marin Rocky bed of Lagunitas Creek. Comment
  CAS-BOT-BC119390  Carex obnupta John Thomas Howell 1946-7-4 22179 Marin Dillons Beach. Comment
  CAS-BOT-BC119391  Carex obnupta John Thomas Howell 1946-5-4 21714 Marin East of Aurora School at Sonoma Co. line. Comment
  CAS-BOT-BC119393  Carex obnupta John Thomas Howell 1943-6-13 18228 Marin Sausalito hills Comment
  RSA52104  Carex obnupta J. T. Howell 1946-5-4 s.n. Marin East of Aurora at Sonoma County Line. Comment
  UC583126  Carex obnupta John Thomas Howell and J. W. Stacey 1936-6-7 12648 Marin on road to Point Reyes; Ledum Swamp Comment
  CAS-BOT-BC119396  Carex obnupta John Thomas Howell; J. W. Stacey 1936-6-7 12648 Marin Ledlum Swamp on road to Point Reyes. Comment
  POM303643  Carex ovalis J. T. Howell 1944-6-4 19567 Marin Mt. Vision west of Inverness Comment
  RSA35304  Carex ovalis J. T. Howell 1944-6-4 19567 Marin Mt. Vision west of Inverness Comment
  UC710414  Carex ovalis John Thomas Howell 1944-6-4 19567 Marin w Inverness; Mount Vision Comment
  CAS-BOT-BC118434  Carex praegracilis John Thomas Howell 1946-6-13 22043 Marin East of Aurora School at Sonoma Co. line. Comment
  CAS-BOT-BC118432  Carex praegracilis John Thomas Howell 1969-5-5 45566 Marin Railroad yards, Tiburon Comment
  RSA220006  Carex praegracilis J. T. Howell 1969-5-5 45566 Marin Railroad yards, Tiburon. Comment
  CAS-BOT-BC117571  Carex serratodens John Thomas Howell 1937-7-4 13087 Marin Tiburon. Comment
  RSA52310  Carex simulata J. T. Howell 1946-6-20 22102 Marin East side of Bolinas Lagoon. Comment
  CAS-BOT-BC116937  Carex subbracteata John Thomas Howell 1945-5-27 20883 Marin NE of Mountain Theater, Mt. Tamalpais. Comment
  UC905019  Carex subbracteata John Thomas Howell 1946-5-16 21858 Marin se side Angel Island Comment
  CAS-BOT-BC116936  Carex subbracteata John Thomas Howell 1949-5-25 25336 Marin Sandy Flats behind dunes at Pt. Reyes Peninsula. Comment
  RSA51944  Carex subbracteata J. T. Howell 1945-5-27 20883 Marin Northeast of Mountain Theater, Mt. Tamalpais. Comment
  UCD140871  Carex subbracteata John Thomas Howell 1938-6-5 13904 Marin Rock Spring, Mountain Tamalpais. Comment
  CAS-BOT-BC116893  Carex subbracteata var. subbracteata John Thomas Howell 1945-5-27 20883 Marin NE of Mountain Theater, Mt. Tamalpais. Comment
  CAS-BOT-BC116896  Carex subbracteata var. subbracteata John Thomas Howell 1943-5-22 18158 Marin Lagunitas Meadows. Comment
  CAS-BOT-BC116897  Carex subbracteata var. subbracteata John Thomas Howell 1937-6-13 13053 Marin Bolinas Comment
  CAS-BOT-BC116898  Carex subbracteata var. subbracteata John Thomas Howell 1946-5-16 21858 Marin Angel Island, SE side. Comment
  CAS-BOT-BC116899  Carex subbracteata var. subbracteata John Thomas Howell 1946-5-16 21858 Marin Angel Island, SE side. Comment
  CAS-BOT-BC116773  Carex subfusca John Thomas Howell 1942-5-2 17936 Marin Warm Spring, Big Carson Canyon Comment
  CAS-BOT-BC115584  Carex tumulicola John Thomas Howell 1944-4-13 19370 Marin Big Rock Ridge west of Hamilton Field. Comment
  UC904998  Carex tumulicola John Thomas Howell 1943-5-2 17929 A Marin Big Carson Canyon Comment
  CAS-BOT-BC115370  Carex utriculata John Thomas Howell 1947-6-4 23212 Marin Swale near radio station, Pt. Reyes Peninsula. Comment
  RSA52098  Carex utriculata J. T. Howell 1947-6-4 23212 Marin Near radio station, Point Reyes Peninsula Comment
  UC905029  Carex vesicaria var. major John Thomas Howell 1946-6-13 22032 Marin Chileno Valley Comment
  CAS-BOT-BC230230  Carpobrotus edulis John Thomas Howell 1948-6-6 24330 Marin Bolinas Sand Spit Comment
  CAS-BOT-BC281896  Carthamus lanatus John Thomas Howell 1946-6-13 22040 Marin Between Chileno Valley and Aurora School Comment
  CAS-BOT-BC281897  Carthamus lanatus John Thomas Howell 1946-9-20 23020 Marin Chileno Valley Comment
  JEPS58916  Castilleja ambigua subsp. ambigua John Thomas Howell 1946-5-25 21940 Marin Greenbrae Marshes Comment
  JEPS58917  Castilleja ambigua subsp. ambigua John Thomas Howell 1944-5-21 19394 Marin Lagunitas Meadow Mt. Tamalpais Comment
  JEPS58918  Castilleja ambigua subsp. ambigua John Thomas Howell 1947-5-14 23152 Marin wnw of Mt. Vision (slope of Drakes estero) Comment
  JEPS58942  Castilleja attenuata John Thomas Howell 1943-4-11 17917 Marin Black Canyon San Rafael Hills Comment
  JEPS86290  Castilleja chrymactis John Thomas Howell 1947-6-4 23220 Marin Pt. Reyes Peninsula, near radio station Pt. Reyes Peninsula Comment
  JEPS58920  Castilleja densiflora subsp. densiflora John Thomas Howell 1946-5-4 21722 Marin e of Dillons Beach Comment
  POM180790  Castilleja foliolosa J. T. Howell 1930-7-20 5383 Marin Mt. Tamalpais on se. side along Wheeler Trail. Comment
  CAS-BOT-BC241297  Castilleja latifolia John Thomas Howell 1941-5-18 16190 Marin Stinson Beach Comment
  CAS-BOT-BC241298  Castilleja latifolia John Thomas Howell 1939-7-2 14826 Marin Ridge between Tennessee Cove and Pirates Cove Comment
  CAS-BOT-BC241299  Castilleja latifolia John Thomas Howell 1944-6-4 19536 Marin Inverness Ridge Comment
  CAS-BOT-BC241300  Castilleja latifolia John Thomas Howell 1946-4-14 21617 Marin Near Tomales Comment
  CAS-BOT-BC32620  Castilleja leschkeana John Thomas Howell 1947-6-4 23220 Marin Pt. Reyes Peninsula. Swale near radio station. Comment
  JEPS58923  Castilleja rubicundula subsp. lithospermoides John Thomas Howell 1940-5-26 15528 Marin Little Carson Falls Comment
  JEPS58950  Castilleja wightii John Thomas Howell 1947-5-4 23129 Marin San Rafael Hills Comment
  CAS-BOT-BC195583  Catapodium rigidum John Thomas Howell 1943-6-13 18225 Marin Sausalito 60 Comment
  CAS-BOT-BC195586  Catapodium rigidum John Thomas Howell 1943-6-13 18225 Marin Sausalito Comment
  CAS-BOT-BC40222  Caulanthus lasiophyllus John Thomas Howell 1946-5-12 21790 Marin Carson Country. Comment
  CAS-BOT-BC40223  Caulanthus lasiophyllus John Thomas Howell 1940-5-12 15429 Marin Between Little Carson and Carson Ridge. Comment
  CAS-BOT-BC49146  Ceanothus cuneatus var. ramulosus John Thomas Howell 1939-6-25 s.n. Marin Summit Ave. above Mill Valley Comment
  CAS-BOT-BC49147  Ceanothus cuneatus var. ramulosus John Thomas Howell 1941-6-29 16345 Marin Rock Spring Trail, Mt. Tamalpais Comment
  CAS-BOT-BC49148  Ceanothus cuneatus var. ramulosus John Thomas Howell 1930-12-28 5718 Marin Slope of Mt. Tamalpais above Mill Valley Comment
  CAS-BOT-BC49149  Ceanothus cuneatus var. ramulosus John Thomas Howell 1938-6-19 13926 Marin Rattlesnake, Mt. Tamalpais Comment
  CAS-BOT-BC64423  Ceanothus foliosus John Thomas Howell 1948-5-16 24298 Marin Upper part of Cascade Canyon, Mt. Tamalpais. Comment
  CAS-BOT-BC64328  Ceanothus gloriosus subsp. exaltatus John Thomas Howell 1944-4-2 19361 Marin Bolinas Ridge. Comment
  CAS-BOT-BC49990  Ceanothus gloriosus var. porrectus John Thomas Howell 1949-5-15 25314 Marin Pine woods west of Inverness Comment
  CAS-BOT-BC49991  Ceanothus gloriosus var. porrectus John Thomas Howell 1944-3-26 19348 Marin on Pt. Reyes Road west of Ledum Swamp Comment
  CAS-BOT-BC50662  Ceanothus jepsonii John Thomas Howell 1944-4-2 19368 Marin Mt. Tamalpais - SW of Lanel Dell Comment
  RSA1036  Ceanothus jepsonii J. T. Howell 1927-8-22 679 Marin Rock Spring Trail, Mt Tamalpais 549 Comment
  CAS-BOT-BC51418  Ceanothus masonii John Thomas Howell 1944-4-2 19364 Marin Bolinas Ridge Comment
  CAS-BOT-BC51419  Ceanothus masonii John Thomas Howell 1944-4-2 19365 Marin Bolinas Ridge Comment
  CAS-BOT-BC52935  Ceanothus thyrsiflorus John Thomas Howell 1927-4-23 2349 Marin In canyon just to east of Muir Woods along Murir Woods-Mill Valley Road. 121 Comment
  CAS-BOT-BC52936  Ceanothus thyrsiflorus John Thomas Howell 1949-5-15 25315 Marin Inverness Ridge w. of Inverness Comment
  CAS-BOT-BC52937  Ceanothus thyrsiflorus John Thomas Howell 1930-12-28 5714 Marin Lower slopes of Mt. Tamalpais, Mill Valley Comment
  UC1177301  Centaurea calcitrapa J. Thomas Howell 1938-11-5 Marin Sausalito Comment
  CAS-BOT-BC274568  Centaurea calcitrapa John Thomas Howell; Conrad V. Morton 1956-8-1 31743 Marin Summit ridge of Mt. Tamalpais Comment
  CAS-BOT-BC274571  Centaurea calcitrapa John Thomas Howell 1939-9-3 15342 Marin Near Novato Comment
  RSA128943  Centaurea calcitrapa J. T. Howell 1939-9-3 15342 Marin Near Novato Comment
  POM248723  Centaurium muehlenbergii J. T. Howell 1938-7-3 13944 Marin At head of Lucas Valley. Comment
  RSA201439  Centaurium muehlenbergii J. T. Howell 1945-9-16 21492 Marin Near San Rafael. Comment
  RSA21992  Centaurium muehlenbergii J. T. Howell 1938-7-3 13944 Marin At head of Lucas Valley. Comment
  SBBG41057  Centaurium tenuiflorum J. T. Howell 1945-9-16 Marin near San Rafael Comment
  CAS-BOT-BC279229  Centromadia pungens subsp. pungens John Thomas Howell 1951-10-11 28294 Marin Olema Marshes Comment
  CAS-BOT-BC388312  Cerastium glomeratum John Thomas Howell 1946-4-14 21629 Marin Near Dillons Beach Comment
  CAS-BOT-BC388314  Cerastium glomeratum John Thomas Howell 1975-3-20 51015 Marin Bear Valley, National Seashore, Pt. Reyes Peninsula Comment
  UC1177233  Chamaecytisus prolifer John Thomas Howell 1947-5-4 23133 Marin San Rafael Hills Comment
  CAS-BOT-BC66349  Cheilanthes covillei John Thomas Howell 1970-5-10 46522 Marin in crevice of Fern Rock, on Old Stage Road above Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC68171  Cheilanthes intertexta John Thomas Howell 1959-8-23 34599 Marin Mt. Tamalpais - exposed rock se. of Rock Spring Comment
  UC1176795  Chenopodium californicum John Thomas Howell 1947-5-14 23166 Marin McClure Beach Comment
  RSA126191  Chenopodium macrospermum var. farinosum J. T. Howell 1947-10-26 24194 Marin Rodeo Lagoon. Comment
  CAS-BOT-BC497690  Chlorogalum pomeridianum John Thomas Howell 1966-7-20 41985 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC497691  Chlorogalum pomeridianum John Thomas Howell 1946-6-16 422086 Marin Pt. Reyes Station Comment
  CAS-BOT-BC499304  Chlorogalum pomeridianum var. divaricatum John Thomas Howell 1942-7-12 17016 Marin Azalea Flat, Matt Davis Trail. Mt. Tamalpais Comment
  CAS-BOT-BC499305  Chlorogalum pomeridianum var. divaricatum John Thomas Howell 1942-6-21 16991 Marin Carson Ridge Comment
  CAS-BOT-BC236912  Chloropyron maritimum subsp. palustre John Thomas Howell 1944-5-28 19518 Marin Salt marsh, Almonte Comment
  CAS-BOT-BC246320  Chloropyron maritimum subsp. palustre John Thomas Howell 1945-8-5 21370 Marin Stinson Beach Comment
  CAS-BOT-BC237993  Chloropyron molle subsp. molle John Thomas Howell 1945-7-8 21277 Marin At Burdell Station Comment
  CAS-BOT-BC237998  Chloropyron molle subsp. molle John Thomas Howell 1945-7-8 21283 Marin Bordering San Antonio Creek near San Antonio station Comment
  CAS-BOT-BC191537  Chorizanthe cuspidata var. villosa John Thomas Howell 1946-5-4 21747 Marin Dillons Beach Comment
  CAS-BOT-BC191538  Chorizanthe cuspidata var. villosa John Thomas Howell 1939-6-4 14727 Marin Pt. Reyes Peninsula Comment
  CAS-BOT-BC191539  Chorizanthe cuspidata var. villosa John Thomas Howell 1939-6-4 14716 Marin Pt. Reyes Lighthouse Comment
  CAS-BOT-BC191542  Chorizanthe cuspidata var. villosa John Thomas Howell 1946-6-9 21999 Marin Abbotts Lagoon Comment
  UC1176925  Chorizanthe cuspidata var. villosa John Thomas Howell 1946-6-9 21999 Marin Abbotts Lagoon Comment
  CAS-BOT-BC257014  Chorizanthe membranacea John Thomas Howell 1941-5-18 s.n. Marin Near Bootjack, Mt. Tamalpais Comment
  UC1176924  Chorizanthe polygonoides var. polygonoides John Thomas Howell 1941-5-25 16229 Marin between Potrero Meadow and Mount Theater (Mount Tamalpais); Mt. Tamalpais, btwn Potrero Meadow and Mt. Theater Comment
  CDA22449  Chorizanthe valida J. T. Howell, Catherine Best, Wilma Follette, G. H. True 1980-6-19 53718 Marin Near Abbotts Lagoon, Point Reyes Peninsula. 0 Comment
Read comments
Dec 20 2017
  SEINET4183201  Chorizanthe valida J. T. Howell, C. Best, W. Follette, G. True 1980-1 Marin Comment
  CAS-BOT-BC105830  Cirsium andrewsii John Thomas Howell 1947-6-18 23275 Marin Dillons Beach Comment
  CAS-BOT-BC105831  Cirsium andrewsii John Thomas Howell 1939-6-4 14720 Marin Pt. Reyes Lighthouse Comment
  CAS-BOT-BC105833  Cirsium andrewsii John Thomas Howell 1933-7-30 11478 Marin Marsh near summit of road from Inverness to Pt. Reyes Comment
  CAS-BOT-BC105836  Cirsium andrewsii John Thomas Howell 1939-7-2 14818 Marin Elk Valley, east of Tennessee Cove Comment
  CAS-BOT-BC105837  Cirsium andrewsii John Thomas Howell 1946-6-30 22129 Marin Marsh east of Rodeo Lagoon Comment
  CAS-BOT-BC105838  Cirsium andrewsii John Thomas Howell 1939-6-4 14719 Marin Pt. Reyes Lighthouse Comment
  CAS-BOT-BC105842  Cirsium andrewsii John Thomas Howell 1947-6-18 23275 Marin Ocean bluffs, Dillons Beach Comment
  POM261290  Cirsium andrewsii J. T. Howell 1939-6-4 14721 Marin Point Reyes Lighthouse Comment
  UC1177291  Cirsium andrewsii J. Thomas Howell 1947-6-18 23275 Marin Dillons Beach Comment
  CAS-BOT-BC32421  Cirsium callilepis John Thomas Howell 1946-5-19 21906 Marin Fairfax Hills, Meadows Club Comment
  UC1177292  Cirsium douglasii var. douglasii J. Thomas Howell 1947-6-18 23286 Marin n of Dillons Beach Comment
  CAS-BOT-BC100962  Cirsium hydrophilum var. vaseyi John Thomas Howell 1938-6-5 13897 Marin Azalea Flat, Mt. Tamalpais Comment
  CAS-BOT-BC100974  Cirsium hydrophilum var. vaseyi John Thomas Howell 1938-6-5 13897 Marin Azalea Flat, Mt. Tamalpais Comment
  CAS-BOT-BC100975  Cirsium hydrophilum var. vaseyi John Thomas Howell 1942-7-12 17032 Marin Potrero Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC285599  Cirsium occidentale var. occidentale John Thomas Howell 1941-5-18 16188 Marin Stinson Beach Comment
  CAS-BOT-BC285602  Cirsium occidentale var. occidentale John Thomas Howell 1945-7-4 21273 Marin Inverness Ridge Comment
  CAS-BOT-BC285604  Cirsium occidentale var. occidentale John Thomas Howell 1946-5-16 21879 Marin Angel Island, s. side Comment
  CAS-BOT-BC286375  Cirsium occidentale var. occidentale John Thomas Howell 1939-6-25 14801 Marin Summit Avenue, Mill Valley Comment
  RSA128532  Cirsium occidentale var. occidentale J. T. Howell 1941-5-18 16188 Marin Stinson Beach Comment
  CAS-BOT-BC286524  Cirsium occidentale var. venustum John Thomas Howell 1947-7-9 23330 Marin Fish Grade between Phoenix and Lagunitas Lakes, Mt. Tamalpais Comment
  CAS-BOT-BC286525  Cirsium occidentale var. venustum John Thomas Howell 1939-6-25 14790 Marin Summit Avenue, Mill Valley Comment
  CAS-BOT-BC286532  Cirsium occidentale var. venustum John Thomas Howell 1941-6-10 16288 Marin Black Point Comment
  CAS-BOT-BC286535  Cirsium occidentale var. venustum John Thomas Howell 1943-5-30 18188 Marin Northside Trail, Mt. Tamalpais Comment
  UC1177304  Cirsium occidentale var. venustum John Thomas Howell 1947-7-9 23330 Marin between Phoenix and Lagunitas Lakes; Mt. Tamalpais, Fish Grade Comment
  UC1177305  Cirsium occidentale var. venustum J. Thomas Howell 1946-5-14 21845 Marin along road between Rock Spring and Summit Meadow; Mt. Tamalpais Comment
  CAS-BOT-BC286522  Cirsium occidentale var. venustum John Thomas Howell 1947-7-9 23331 Marin On Fish Grade, Mt. Tamalpais Comment
  CAS-BOT-BC280467  Cirsium quercetorum John Thomas Howell 1943-6-6 18200 Marin Between Mill Valley and Muir Woods Comment
  CAS-BOT-BC280470  Cirsium quercetorum John Thomas Howell 1943-6-13 18235 A Marin Sausalito Comment
  CAS-BOT-BC280471  Cirsium quercetorum John Thomas Howell 1939-7-2 14819 Marin Elk Valley Comment
  CAS-BOT-BC288684  Cirsium quercetorum John Thomas Howell 1939-6-4 14718 Marin Point Reyes lighthouse Comment
  POM261289  Cirsium quercetorum J. T. Howell 1939-6-25 14796 Marin Summit Avenue, Mill Valley Comment
  CAS-BOT-BC280463  Cirsium quercetorum John Thomas Howell 1940-5-12 15411 Marin San Geronimo Ridge Comment
  CAS-BOT-BC288736  Cirsium remotifolium John Thomas Howell 1939-6-25 14799 Marin Summit Avenue, Mill Valley Comment
  CAS-BOT-BC288737  Cirsium remotifolium John Thomas Howell 1939-6-25 14795 Marin Summit Avenue, Mill Valley Comment
  CAS-BOT-BC288742  Cirsium remotifolium John Thomas Howell 1940-5-26 15520 Marin San Anselmo Canyon Comment
  CAS-BOT-BC288744  Cirsium remotifolium John Thomas Howell 1943-5-30 18181 Marin Summit Ave, Mill Valley Comment
  CAS-BOT-BC288752  Cirsium remotifolium John Thomas Howell 1939-6-25 14798 Marin Summit Avenue, Mill Valley Comment
  CAS-BOT-BC288730  Cirsium remotifolium John Thomas Howell 1940-5-26 15520 Marin San Anselmo Comment
  CAS-BOT-BC288733  Cirsium remotifolium John Thomas Howell 1939-6-25 14795 Marin Summit Ave, Mill Valley, Mt Tamalpais Comment
  CAS-BOT-BC288738  Cirsium remotifolium John Thomas Howell 1936-6-7 12631 Marin Whites Hill E of San Geronimo Comment
  CAS-BOT-BC288739  Cirsium remotifolium John Thomas Howell 1936-6-7 12631 Marin White's Hill E of San Geronimo Comment
  CAS-BOT-BC288745  Cirsium remotifolium John Thomas Howell 1936-6-7 12631 A Marin White's Hill, E of San Geronimo Comment
  SBBG27976  Clarkia amoena J. T. Howell 1946-6-9 Marin Pierce Ranch, N of Point Reyes peninsula Comment
  UC1422872  Clarkia amoena subsp. amoena John Thomas Howell 1946-6-9 22012 Marin Pierce Ranch Pt. Reyes Peninsula Comment
  CAS-BOT-BC164305  Clarkia davyi John Thomas Howell 1947-6-4 23223 Marin Near radio station, Pt. Reyes Peninsula Comment
  CAS-BOT-BC164292  Clarkia davyi John Thomas Howell 1946-5-26 21951 Marin Dunes near radio station, Pt. Reyes Station Comment
  RSA299144  Clarkia davyi J. T. Howell, Catherine Best, Wilma Follette, Gordon H. True 1980-6-19 53720 Marin Near Abbott s Lagoon, Point Reyes Peninsula. Comment
  UC1422874  Clarkia gracilis John Thomas Howell 1947-5-18 23173 Marin Fairfax Hills Comment
  CAS-BOT-BC164612  Clarkia gracilis subsp. gracilis John Thomas Howell 1946-5-19 21912 Marin Meadows Club, Fairfax Hills Comment
  RSA114324  Clarkia gracilis subsp. gracilis J. T. Howell 1947-5-18 23173 Marin Fairfax Hills. Comment
  UC1422875  Clarkia gracilis subsp. sonomensis John Thomas Howell 1940-5-12 15420 Marin Lagunitas Creek Comment
Read comments
Jun 24 2011
  CAS-BOT-BC172452  Clarkia purpurea subsp. purpurea John Thomas Howell 1938-5-22 13796 Marin San Anselmo Canyon Comment
  UC1422879  Clarkia purpurea subsp. purpurea John Thomas Howell 1947-5-21 23187 Marin Tiburon Comment
  RSA114321  Clarkia purpurea subsp. purpurea J. T. Howell 1947-5-21 23187 Marin Tiburon. Comment
  CAS-BOT-BC163741  Clarkia purpurea subsp. quadrivulnera John Thomas Howell 1943-5-9 17980 Marin San Rafael Hills Comment
  CAS-BOT-BC164550  Clarkia purpurea subsp. viminea John Thomas Howell 1943-5-15 18081 Marin Tiburon Peninsula Comment
  CAS-BOT-BC164551  Clarkia purpurea subsp. viminea John Thomas Howell 1941-6-10 s.n. Marin Black Point Comment
  SBBG47373  Clarkia rubicunda J. T. Howell 1972-6-18 Marin near Ring Hill, Tiburon Peninsula 167 Comment
  CAS-BOT-BC439222  Claytonia exigua subsp. exigua John Thomas Howell 1945-4-29 20798 Marin Fairfax Hills Comment
  CAS-BOT-BC439234  Claytonia exigua subsp. exigua John Thomas Howell 1944-4-2 19367 Marin Bolinas Ridge Comment
  UC1106073  Claytonia exigua subsp. exigua John Thomas Howell 1946-3-17 Marin near Rock Spring; Mt. Tamalpais Comment
  CAS-BOT-BC439219  Claytonia exigua subsp. exigua John Thomas Howell 1945-4-29 s.n. Marin Above Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC439224  Claytonia exigua subsp. exigua John Thomas Howell 1946-3-24 21579 Marin Carson Ridge Comment
  CAS-BOT-BC439232  Claytonia exigua subsp. exigua John Thomas Howell 1946-5-14 s.n. Marin Near Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC439235  Claytonia exigua subsp. exigua John Thomas Howell 1946-3-24 21579 Marin Carson Ridge Comment
  UC1176766  Claytonia exigua subsp. exigua John Thomas Howell 1946-3-24 21578 Marin Carson Ridge Comment
  UC1176776  Claytonia exigua subsp. exigua John Thomas Howell 1946-5-12 Marin above Little Carson Comment
  CAS-BOT-BC439353  Claytonia gypsophiloides John Thomas Howell 1946-3-24 21563 Marin Fairfax Hills Comment
  RSA0059502  Claytonia gypsophiloides J. T. Howell 1945-4-29 20795 Marin Serpentine ridge W of Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC443592  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1946-4-13 21604 Marin Near Rock Spring, Mt. Tamalpais Comment
  UC1176778  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1946-4-13 21604 Marin near Rock Spring; Mt. Tamalpais Comment
  CAS-BOT-BC175894  Claytonia rubra subsp. rubra John Thomas Howell 1946-3-24 21584 Marin Carson country Comment
  CAS-BOT-BC443945  Claytonia sibirica John Thomas Howell 1946-4-21 21680 Marin Pt. Reyes Peninsula Comment
  JEPS58936  Collinsia sparsiflora var. sparsiflora John Thomas Howell 1946-4-13 21600 Marin Mt. Tamalpais; summit meadow to Rock Spring Comment
  CAS-BOT-BC285925  Conyza bonariensis John Thomas Howell 1939-11-5 s.n. Marin Sausalito Comment
  CAS-BOT-BC286131  Conyza canadensis John Thomas Howell 1944-3-26 19349 Marin Pt. Reyes road west of Ledum Swamp Comment
  UC1177266  Conyza canadensis John Thomas Howell 1944-3-26 19349 Marin Pt. Reyes road w of Ledum Swamp Comment
  UC1177302  Conyza canadensis John Thomas Howell 1945-10-14 Marin Olema Marshes Comment
  SEINET4675796  Cordylanthus maritimus John Thomas Howell 1933-1 Marin Comment
  JEPS58938  Cordylanthus maritimus subsp. palustris John Thomas Howell 1944-5-28 19518 Marin salt marsh Almonte Comment
  HSC24634  Cordylanthus mollis J. T. Howell 1945-7-8 21277 Marin Burdell Station Comment
  POM273195A  Cordylanthus mollis subsp. mollis J. T. Howell 1945-7-8 s.n. Marin Burdell Station Comment
  RSA82046  Cordylanthus mollis subsp. mollis J. T. Howell 1945-7-8 21277 Marin Burdell Station Comment
  JEPS58937  Cordylanthus pilosus subsp. pilosus John Thomas Howell 1942-9-13 17865 Marin Fairfax Comment
  CAS-BOT-BC105654  Corethrogyne filaginifolia John Thomas Howell 1939-6-18 14767 Marin Near Mud Lake Comment
  RSA128946  Corethrogyne filaginifolia var. californica J. T. Howell 1939-6-18 14767 Marin Near Mud Lake Comment
  CAS-BOT-BC209742  Cornus glabrata John Thomas Howell 1946-6-13 22023 Marin Chileno Valley Comment
  CAS-BOT-BC210252  Cornus sericea John Thomas Howell 1944-5-7 19444 Marin Larkspur Comment
  CAS-BOT-BC141592  Cotoneaster pannosus John Thomas Howell 1959-11-4 35104 Marin Sausalito Comment
  RSA0075668  Cotoneaster pannosus J. T. Howell 1959-11-4 35104 Marin Sausalito. Comment
  UC1106192  Cotula australis John Thomas Howell 1945-9-16 21468 Marin San Rafael Comment
  CAS-BOT-BC287216  Cotula australis John Thomas Howell 1945-9-16 21468 Marin San Rafael Comment
  CAS-BOT-BC427586  Crassula aquatica John Thomas Howell 1944-5-21 19499 Marin Lagunitas Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC427588  Crassula aquatica John Thomas Howell 1946-9-18 s.n. Marin Lake Lagunitas, Mt. Tamalpais Comment
  CAS-BOT-BC427587  Crassula aquatica John Thomas Howell 1945-5-9 20857 Marin Near Hamilton Field Comment
  UC1177286  Crepis capillaris John Thomas Howell 1945-7-29 21338 Marin Bolinas Comment
  CAS-BOT-BC291496  Crepis capillaris John Thomas Howell 1944-7-9 19715 Marin South of Tomales Bay Comment
  CAS-BOT-BC291497  Crepis capillaris John Thomas Howell 1945-7-29 21338 Marin Bolinas Comment
  CAS-BOT-BC291498  Crepis capillaris John Thomas Howell 1957-7-22 32821 Marin Pt. Reyes Station Comment
  CAS-BOT-BC190132  Crypsis vaginiflora John Thomas Howell 1980-9-8 53894 Marin Alpine Lake near Bon Tempe Lake Dam. Comment
  CAS-BOT-BC85476  Cupressus sargentii John Thomas Howell 1926-2-28 1656 Marin Mt. Tamalpais Comment
  CAS-BOT-BC85477  Cupressus sargentii John Thomas Howell 1956-1-1 30916 Marin On serpentine above Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC85478  Cupressus sargentii John Thomas Howell 1927-8-22 3040 Marin On rocky slope on Rock Spring Trail west of West Point, Mt. Tamalpais 548 Comment
  POM193914  Cupressus sargentii J. T. Howell 1927-8-22 3040 Marin Rock Spring Trail, west of West Point, Mt. Tamalpais 549 Comment
  CAS-BOT-BC224496  Cuscuta californica John Thomas Howell 1939-5-21 14696 Marin South end of Tiburon Peninsula Comment
  CAS-BOT-BC224497  Cuscuta californica John Thomas Howell 1942-7-5 17010 Marin Fern Canyon, Mt. Tamalpais Comment
  CAS-BOT-BC224502  Cuscuta californica John Thomas Howell 1941-7-6 16369 Marin Rocky Ridge Fire Trail, Mt. Tamalpais Comment
  CAS-BOT-BC224504  Cuscuta californica John Thomas Howell 1944-7-7 19679 Marin Above Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC224505  Cuscuta californica John Thomas Howell 1946-6-23 22121 Marin Carson Ridge Comment
  CAS-BOT-BC224498  Cuscuta californica John Thomas Howell 1967-5-24 42257 Marin Dakin Lane, just north of Old St. Hilary's Church, Tiburon Comment
  RSA201401  Cuscuta californica var. californica J. T. Howell 1944-7-7 19679 Marin Serpentine above Camp Handy. Mt. Tamalpais. Comment
  SBBG47341  Cuscuta californica var. californica J. T. Howell 1972-6-18 Marin near Ring Hill, Tiburon Peninsula 167 Comment
  RSA22025  Cuscuta ceanothi J. T. Howell 1939-9-3 15355 Marin San Antonio Creek Comment
  RSA22078  Cuscuta salina var. major J. T. Howell 1939-11-5 15386 Marin Sausalito Comment
  LA39963  Cuscuta subinclusa John Thomas Howell; 1939-9-3 15355 Marin at mouth of San Antonio Creek Comment
  CAS-BOT-BC190417  Cynosurus echinatus John Thomas Howell 1943-5-22 18157 Marin Lagunitas Meadows. Comment
  CAS-BOT-BC190418  Cynosurus echinatus John Thomas Howell 1942-6-7 s.n. Marin San Anselmo Canyon. Comment
  CAS-BOT-BC114725  Cyperus difformis John Thomas Howell 1945-1-7 20771 Marin CCC Camp above Muir Woods, Mt. Tamalpais. Comment
  CDA3337  Cypselea humifusa J. T. Howell 1947-10-19 24184 Marin 0 Comment
  UC905069  Cypselea humifusa John Thomas Howell 1947-10-19 24184 Marin Alpine Lake Comment
  UCD96976  Cypselea humifusa John Thomas Howell 1947-10-19 24184 Marin Desiccated strand of Alpine Lake. Comment
  CAS-BOT-BC435176  Cypselea humifusa John Thomas Howell 1939-8-27 15327 Marin Lake Lagunitas Comment
  CAS-BOT-BC189714  Danthonia californica John Thomas Howell 1947-7-6 23326 Marin Mount Tamalpais. Near Barths Retreat. Comment
  CAS-BOT-BC189715  Danthonia californica John Thomas Howell 1966-4-18 41502 Marin Tiburon. John Thomas Howell Botanical Garden. Comment
  CAS-BOT-BC189720  Danthonia californica John Thomas Howell 1950-6-4 26624 Marin Mount Tamalpais. Near Mountain Home. Comment
  CAS-BOT-BC189721  Danthonia californica John Thomas Howell 1929-6-2 4286 Marin Hills near Fort Baker. Comment
  CAS-BOT-BC189726  Danthonia californica John Thomas Howell 1943-5-9 17966 Marin San Rafael Hills. Comment
  CAS-BOT-BC189727  Danthonia californica John Thomas Howell 1966-4-30 41525 Marin Tiburon. John Thomas Howell Botanical Garden. Southeast of church. Comment
  CAS-BOT-BC287389  Deinandra corymbosa John Thomas Howell 1939-9-3 15336 Marin Near Black Point Comment
  CAS-BOT-BC287390  Deinandra corymbosa John Thomas Howell 1941-6-8 16252 Marin Hills NE of San Rafael Comment
  CAS-BOT-BC287391  Deinandra corymbosa John Thomas Howell 1944-6-25 19650 Marin Santa Venetia Comment
  CAS-BOT-BC287393  Deinandra corymbosa John Thomas Howell 1939-9-3 15336 Marin Near Black Point Comment
  CAS-BOT-BC287397  Deinandra corymbosa John Thomas Howell 1945-9-2 21461 Marin San Rafael Hills Comment
  UC1176753  Delphinium John Thomas Howell 1945-5-20 20869 Marin Tiburon Comment
  CAS-BOT-BC9614  Delphinium californicum John Thomas Howell 1943-6-13 s.n. Marin Sausalito Comment
  UC1176744  Delphinium californicum John Thomas Howell 1946-6-20 22091 Marin Muir Beach Comment
  CAS-BOT-BC9004  Delphinium decorum John Thomas Howell 1949-6-7 25345 Marin Dillons Beach Comment
  CAS-BOT-BC9007  Delphinium decorum John Thomas Howell 1940-5-20 15500 Marin Pt. Reyes Comment
  CAS-BOT-BC10177  Delphinium hesperium John Thomas Howell 1941-5-25 16234 Marin Near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC10178  Delphinium hesperium John Thomas Howell 1944-5-27 19503 Marin Summit Ave ridge, Mt. Tamalpais Comment
  CAS-BOT-BC10179  Delphinium hesperium John Thomas Howell 1946-5-19 21928 Marin Saddle between Big and Little Carson Canyons Comment
  CAS-BOT-BC10180  Delphinium hesperium John Thomas Howell 1946-5-19 21928 Marin Saddle between Big and Little Carson Canyons Comment
  CAS-BOT-BC10181  Delphinium hesperium John Thomas Howell 1946-6-9 21998 Marin Abbotts Lagoon Comment
  CAS-BOT-BC10250  Delphinium hesperium John Thomas Howell 1972-6-18 48872 Marin Near Ring Hill, Tuburon Peninsula 167 Comment
  UC1176745  Delphinium patens John Thomas Howell 1940-5-12 15436 Marin San Anselmo Creek Canyon Comment
  CAS-BOT-BC121642  Delphinium patens subsp. patens John Thomas Howell 1940-5-12 15436 Marin San Anselmo Creek Canyon Comment
  CAS-BOT-BC192548  Deschampsia cespitosa subsp. holciformis John Thomas Howell 1943-7-11 s.n. Marin Potrero Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC192557  Deschampsia cespitosa subsp. holciformis John Thomas Howell 1941-5-25 16224 Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC192558  Deschampsia cespitosa subsp. holciformis John Thomas Howell 1946-6-30 22153 Marin Rodeo Lagoon Comment
  UC1177108  Deschampsia cespitosa subsp. holciformis John Thomas Howell 1946-6-30 22153 Marin Rodeo Lagoon Comment
  CAS-BOT-BC198485  Deschampsia danthonioides John Thomas Howell 1945-4-29 s.n. Marin Lagunitas Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC198492  Deschampsia danthonioides John Thomas Howell 1943-5-15 18100 Marin South end, Tiburon Peninsula Comment
  UC1106223  Deschampsia danthonioides John Thomas Howell 1944-5-21 19498 Marin Lagunitas Meadows Mt. Tamalpais; , Lagunitas Meadows Comment
  CAS-BOT-BC201819  Deschampsia elongata John Thomas Howell 1943-5-9 17951 Marin Black Canyon, San Rafael Hills Comment
  CAS-BOT-BC201822  Deschampsia elongata John Thomas Howell 1944-6-25 19660 Marin Between Santa Venetia and Chinese Camp Comment
  CAS-BOT-BC201824  Deschampsia elongata John Thomas Howell 1942-6-21 16982 Marin Carson Ridge Comment
  CAS-BOT-BC201825  Deschampsia elongata John Thomas Howell 1942-6-21 s.n. Marin Carson Ridge Comment
  RSA126474  Deschampsia elongata J. T. Howell 1945-6-3 20925 Marin Shell Beach. Comment
  SEINET199906 Image available Deschampsia elongata J. T. Howell 1942-6-21 16982 Marin Carson Ridge Comment
  UC1177110  Deschampsia elongata John Thomas Howell 1946-5-19 21920 Marin Carson Ridge Comment
  SEINET10524296  Deschampsia elongata John Thomas Howell 1944-6-25 Howell 19660 Marin Salt marsh between Santa Venetia and Chinese Camp. Comment
  UC1106106  Desmazeria rigida John Thomas Howell 1943-6-13 18225 Marin Sausalito 60 Comment
  UCD63903  Desmazeria rigida John Thomas Howell 1943-6-13 18225 Marin Sausalito. 60 Comment
  UCR70885  Desmazeria rigida J. T. Howell 1943-6-13 18225 Marin Sausalito 61 Comment
  CAS-BOT-BC209204  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1936-6-7 12651 Marin Pine woods near Inverness. Comment
  CAS-BOT-BC254480  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1945-6-24 21238 Marin Mount Tamalpais, Willow Meadows, Kent Trail Comment
  CAS-BOT-BC254481  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1941-5-25 16225 Marin Portrero Meadow, Mount Tamalpais Comment
  CAS-BOT-BC254488  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1941-6-29 16340 Marin Between Rock Spring and Laurel Dell, Mount Tamalpais Comment
  CAS-BOT-BC254489  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1943-7-3 18247 Marin Near Bootjack, Mount Tamalpais Comment
  SEINET199937 Image available Dichanthelium acuminatum subsp. fasciculatum John Thomas Howell 1941-6-29 16340 Marin Between rock Srping and Laurel Dell. Mt. Tamalpais Comment
  RSA201452  Dichondra donelliana J. T. Howell 1947-5-8 23147 Marin Sausalito Comment
  CAS-BOT-BC209004  Digitaria sanguinalis John Thomas Howell 1989-10-16 s.n. Marin Terra Linda, Freitas Park Comment
  CAS-BOT-BC209005  Digitaria sanguinalis John Thomas Howell 1939-8-27 15311 Marin Ross Comment
  CAS-BOT-BC34725  Digitaria sanguinalis J. T. Howell 1988-8-10 s.n. Marin Terra Linda community vegetable gardens Comment
  UCR244518  Digitaria sanguinalis J. T. Howell 1989-10-16 s.n. Marin Terra Linda, Freitas Park 29 Comment
  CAS-BOT-BC151946  Diplacus douglasii John Thomas Howell 1946-3-24 21587 Marin Carson country Comment
  RSA126206  Dirca occidentalis J. T. Howell 1948-5-31 s.n. Marin Devil's Gulch, near Camp Taylor Comment
  JEPS58880  Downingia concolor var. concolor John Thomas Howell 1946-6-13 22044 Marin e of Aurora School (at Sonoma County line) Comment
  CAS-BOT-BC157715  Drymocallis glandulosa var. glandulosa John Thomas Howell 1925-4-5 901 Marin Pipeline Trail Comment
  UC1177505  Dryopteris arguta John Thomas Howell 1940-5-12 Marin Lagunitas Creek Canyon; Mt. Tamalpais Comment
  CAS-BOT-BC70899  Dryopteris arguta John Thomas Howell 1965-6-2 41325 Marin Fern Curve on highway to coast nw. of Tamalpais Valley Comment
  CAS-BOT-BC536734  Duchesnea indica John Thomas Howell 1940-9-15 s.n. Marin Mt. Tamalpais Comment
  CAS-BOT-BC427999  Dudleya caespitosa John Thomas Howell 1933-7-23 11460 Marin Sausalito Hills Comment
  CAS-BOT-BC428001  Dudleya caespitosa John Thomas Howell 1945-8-19 21446 Marin At head of Drakes Bay Comment
  CAS-BOT-BC428003  Dudleya caespitosa John Thomas Howell 1939-7-2 14833 A Marin Pirates Cove Comment
  CAS-BOT-BC428301  Dudleya farinosa John Thomas Howell 1939-5-21 14692 A Marin South end of Tiburon Peninsula Comment
  CAS-BOT-BC197007  Echinochloa colona J. T. Howell 1988-7-16 s.n. Marin Vegetable garden in Terra Linda Comment
  CAS-BOT-BC197008  Echinochloa colona John Thomas Howell 1990-10-24 s.n. Marin At Frazier Park on Monticello at the entrance to Kaiser Hospital, San Rafael Comment
  CAS-BOT-BC197146  Echinochloa crus-galli John Thomas Howell 1939-9-3 15343 Marin Near Novato Comment
  CAS-BOT-BC197147  Echinochloa crus-galli John Thomas Howell 1943-9-5 19320 Marin Just south of Mill Valley Comment
  CAS-BOT-BC197151  Echinochloa crus-galli John Thomas Howell 1939-9-3 s.n. Marin San Antonio Creek Comment
  UC1177028  Echinochloa crus-galli John Thomas Howell 1943-9-5 19320 Marin just s Mill Valley Comment
  CAS-BOT-BC197148  Echinochloa crus-galli John Thomas Howell 1959-10-18 35101 Marin Near Inverness Comment
  CAS-BOT-BC197260  Echinochloa muricata var. microstachya J. T. Howell 1988-9-29 s.n. Marin Vegetable garden in Terra Linda Comment
  CAS-BOT-BC197261  Echinochloa muricata var. microstachya John Thomas Howell 1980-9-8 53892 Marin Bottom of Alpine Lake near Bon Temple Lake dam Comment
  UCD61089  Echinochloa muricata var. microstachya John Thomas Howell 1980-9-8 53892 Marin Alpine Lake near Bon Tempe Lake dam. Comment
  CAS-BOT-BC445604  Echinodorus berteroi John Thomas Howell 1959-11-4 35119 Marin 11 miles from Marshall on road to Petaluma Comment
  CDA5611  Echium plantagineum J. T. Howell 1969-7-1 45871 Marin Southwest of Point Reyes Station on road to Inverness. 0 Comment
  CAS-BOT-BC113675  Eleocharis acicularis John Thomas Howell 1946-9-15 23008 Marin HIdden Lake, Mt. Tamalpais. Comment
  RSA127379  Eleocharis acicularis var. acicularis J. T. Howell 1946-7-4 22182 Marin East of Aurora School at Sonoma County line Comment
  CAS-BOT-BC112867  Eleocharis macrostachya John Thomas Howell 1944-6-25 19640 Marin San Rafel Comment
  CAS-BOT-BC112861  Eleocharis macrostachya John Thomas Howell 1939-8-27 15315 Marin Phoenix Lake, Mt. Tamalpais Comment
  CAS-BOT-BC112863  Eleocharis macrostachya John Thomas Howell 1945-9-13 21462 Marin Fresh water marshes south end of Tomales Bay. Comment
  CAS-BOT-BC112868  Eleocharis macrostachya John Thomas Howell 1944-4-23 19398 Marin San Rafel Comment
  RSA127258  Eleocharis palustris J. T. Howell 1944-6-4 19568 Marin Mt. Vision west of Inverness Comment
  CAS-BOT-BC112256  Eleocharis rostellata John Thomas Howell 1945-5-20 20870 Marin Tiburon Comment
  CAS-BOT-BC112025  Eleocharis suksdorfiana John Thomas Howell 1947-6-4 23210 Marin Swale near radio station, Pt. Reyes Peninsula Comment
  RSA127233  Elymus X gouldii J. T. Howell 1946-6-30 22143 Marin Rodeo Lagoon Comment
  CAS-BOT-BC203850  Elymus X hansenii John Thomas Howell 1939-7-2 14845 Marin Near Muir Woods Comment
  CAS-BOT-BC203851  Elymus X hansenii John Thomas Howell 1943-6-6 18206 Marin Ridge se. of Muir Woods Comment
  CAS-BOT-BC203853  Elymus X hansenii John Thomas Howell 1943-5-15 18082 Marin Tiburon Peninsula Comment
  CAS-BOT-BC203857  Elymus X hansenii John Thomas Howell 1943-5-15 18074 Marin Tiburon Peninsula Comment
  CAS-BOT-BC203858  Elymus X hansenii John Thomas Howell 1943-5-22 18139 Marin Fairfax hills Comment
  CAS-BOT-BC203860  Elymus X hansenii John Thomas Howell 1941-6-29 16333 Marin Between Rock Spring and Laurel Dell, Mt. Tamalpais Comment
  CAS-BOT-BC203861  Elymus X hansenii John Thomas Howell 1941-5-25 16236 Marin Near Bootjack, Mt. Tamalpais Comment
  RSA127280  Elymus X hansenii J. T. Howell 1948-5-31 24325 Marin Devil's Gulch, near Camp Taylor Comment
  SEINET249949  Elymus elymoides subsp. brevifolius John Thomas Howell 1943-5-15 18082 Marin Tiburon Peninsula. Comment
  RSA127203  Elymus glaucus J. T. Howell 1946-5-26 21956 Marin Ocean bluff, Point Reyes Lighthouse Comment
  UC1106088  Elymus glaucus John Thomas Howell 1941-6-29 16341 Marin Laurel Dell Mt. Tamalpais Comment
  CAS-BOT-BC203487  Elymus glaucus subsp. glaucus John Thomas Howell 1941-6-29 16341 Marin Laurel Dell, Mt. Tamalpais Comment
  CAS-BOT-BC203489  Elymus glaucus subsp. glaucus John Thomas Howell 1943-5-9 17944 Marin San Rafael Comment
  CAS-BOT-BC203490  Elymus glaucus subsp. glaucus John Thomas Howell 1941-5-25 16215 Marin Rifle Camp, Mt. Tamalpais Comment
  CAS-BOT-BC203491  Elymus glaucus subsp. glaucus John Thomas Howell 1941-6-29 16342 Marin Laurel Dell, Mt. Tamalpais Comment
  CAS-BOT-BC203493  Elymus glaucus subsp. glaucus John Thomas Howell 1943-6-6 18199 Marin Between Mill Valley and Muir Woods Comment
  CAS-BOT-BC203504  Elymus glaucus subsp. glaucus John Thomas Howell 1945-6-12 20961 Marin Near radio station, Point Reyes Peninsula Comment
  CAS-BOT-BC203505  Elymus glaucus subsp. glaucus John Thomas Howell 1945-6-30 s.n. Marin Twin Beaches Comment
  CAS-BOT-BC203512  Elymus glaucus subsp. glaucus John Thomas Howell 1943-5-22 18117 Marin Fairfax Comment
  CAS-BOT-BC203514  Elymus glaucus subsp. glaucus John Thomas Howell 1946-5-26 21956 Marin Pt. Reyes Lighthouse Comment
  CAS-BOT-BC203521  Elymus glaucus subsp. glaucus John Thomas Howell 1943-5-22 18122 Marin Deer Park near Fairfax Comment
  CAS-BOT-BC203523  Elymus glaucus subsp. glaucus John Thomas Howell 1939-7-16 s.n. Marin West Point, Mt. Tamalpais Comment
  CAS-BOT-BC203526  Elymus glaucus subsp. glaucus John Thomas Howell 1943-5-15 18075 Marin Tiburon Peninsula Comment
  CAS-BOT-BC203527  Elymus glaucus subsp. glaucus John Thomas Howell 1944-5-21 19490 Marin West end of Phoenix Lake, Mt. Tamalpais Comment
  CAS-BOT-BC203528  Elymus glaucus subsp. glaucus John Thomas Howell 1943-5-22 18146 Marin Fairfax hills Comment
  SEINET199909 Image available Elymus glaucus subsp. glaucus John Thomas Howell 1943-5-15 18097 Marin Tiburon Peninsula Comment
  SEINET199930  Elymus glaucus subsp. glaucus J. T. Howell 1943-6-6 18209 Marin Camp below Muir Woods Comment
  CAS-BOT-BC203803  Elymus glaucus subsp. virescens John Thomas Howell 1942-6-21 s.n. Marin Carson Ridge Comment
  CAS-BOT-BC203806  Elymus glaucus subsp. virescens John Thomas Howell 1946-6-9 22009 Marin Pierce Ranch, n. Pt. Reyes Peninsula Comment
  CAS-BOT-BC203807  Elymus glaucus subsp. virescens John Thomas Howell 1943-7-4 18249 Marin Ledum Swamp on road to Point Reyes Comment
  CAS-BOT-BC203808  Elymus glaucus subsp. virescens John Thomas Howell 1947-5-14 23161 Marin McClure Beach Comment
  CAS-BOT-BC203809  Elymus glaucus subsp. virescens John Thomas Howell 1946-5-26 21955 Marin Pt. Reyes Lighthouse Comment
  CAS-BOT-BC203811  Elymus glaucus subsp. virescens John Thomas Howell 1945-7-15 21306 Marin Near Liberty's Comment
  CAS-BOT-BC203813  Elymus glaucus subsp. virescens John Thomas Howell 1947-5-14 23161 Marin McClure Beach Comment
  RSA127230  Elymus glaucus subsp. virescens J. T. Howell 1947-5-14 23161 Marin McClure Beach Comment
  UC1106108  Elymus glaucus subsp. virescens John Thomas Howell 1946-7-7 22221 Marin Mt. Tamalpais; West Peak Comment
  CAS-BOT-BC234056  Elymus multisetus John Thomas Howell 1941-5-25 16231 Marin Between Potrero Meadow and Mt. Theater, Mt. Tamalpais Comment
  CAS-BOT-BC234058  Elymus multisetus John Thomas Howell 1942-6-21 16990 Marin Carson Ridge Comment
  CAS-BOT-BC234059  Elymus multisetus John Thomas Howell 1943-5-15 18072 Marin Tiburon Peninsula Comment
  CAS-BOT-BC234060  Elymus multisetus John Thomas Howell 1941-5-25 16231 Marin Between Potrero Meadow & Mountain Theatre, Mt. Tamalpais Comment
  UC1176794  Elymus multisetus John Thomas Howell 1944-6-25 Marin San Rafael Comment
  UC1177106  Elymus trachycaulus John Thomas Howell 1943-6-8 18218 Marin Tiburon Comment
  CAS-BOT-BC204294  Elymus trachycaulus subsp. trachycaulus John Thomas Howell 1943-6-8 18218 Marin Tiburon Comment
  SEINET199910 Image available Elymus triticoides John Thomas Howell 1943-5-9 19314 Marin Between Jamalpais Valley and Jamalpais High School Comment
  RSA31375  Epilobium brachycarpum J. T. Howell 1945-9-16 21477 Marin San Rafael. Comment
  RSA31376  Epilobium brachycarpum J. T. Howell 1945-9-16 21478 Marin San Rafael. Comment
  RSA31377  Epilobium brachycarpum J. T. Howell 1946-9-8 s.n. Marin Near Ignacio Comment
  RSA31420  Epilobium brachycarpum J. T. Howell 1946-9-20 23019 Marin Chileno Valley Comment
  RSA31421  Epilobium brachycarpum J. T. Howell 1946-9-20 23018 Marin Chileno Valley Comment
  RSA31384  Epilobium ciliatum subsp. watsonii J. T. Howell 1945-8-5 21368 Marin Stinson Beach Comment
  RSA31418  Epilobium ciliatum subsp. watsonii J. T. Howell 1946-5-4 31737 Marin Dillon Beach. Comment
  UC1177511  Equisetum X ferrissii John Thomas Howell 1944-9-24 20760 Marin w side Bolinas Lagoon Comment
  CAS-BOT-BC57903  Equisetum arvense John Thomas Howell 1945-5-20 20876 Marin Tiburon. Comment
  CAS-BOT-BC57912  Equisetum arvense John Thomas Howell 1945-5-20 20876 Marin Tiburon. Comment
  CAS-BOT-BC57913  Equisetum arvense John Thomas Howell 1940-5-12 15415 Marin Lagunitas Creek. Comment
  UC1177512  Equisetum telmateia subsp. braunii John Thomas Howell 1940-5-12 15416 Marin Lagunitas Creek Comment
  CAS-BOT-BC213561  Eragrostis hypnoides John Thomas Howell 1988-9-15 s.n. Marin Nicasio Reservoir Comment
  CAS-BOT-BC204587  Eragrostis mexicana subsp. virescens John Thomas Howell 1986-9-3 s.n. Marin Terra Linda Vegetable Garden, Nova Albion & Cermenho Ct, San Rafael Comment
  RSA127590  Eragrostis pectinacea J. T. Howell 1954-9-23 30109 Marin Ross, Milton H. Esberg place. Comment
  CAS-BOT-BC284136  Eragrostis pectinacea var. pectinacea John Thomas Howell 1959-11-4 35117 Marin Reservoir north of Point Reyes (town) Comment
  CAS-BOT-BC291181  Erechtites glomeratus John Thomas Howell 1965-10-13 41413 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC291183  Erechtites glomeratus John Thomas Howell 1929-6-2 4296 Marin Between Fort Baker and Fort Barry Comment
  CAS-BOT-BC299922  Erechtites minimus John Thomas Howell 1944-7-30 19857 Marin Almonte Comment
  CDA4542  Erechtites minimus J. T. Howell 1944-7-3 19857 Marin Almonte. 0 Comment
  CAS-BOT-BC131540  Ericameria arborescens John Thomas Howell 1924-9-14 652 Marin Pipeline Trail Comment
  CAS-BOT-BC131550  Ericameria arborescens John Thomas Howell 1930-12-28 5716 Marin Slopes of Mt. Tamalpais above Mill Valley Comment
  UC1177270  Ericameria nauseosa var. speciosa John Thomas Howell 1946-9-8 22994 Marin at St. Vincent's, along Redwood Highway Comment
  CAS-BOT-BC300594  Erigeron foliosus var. franciscensis John Thomas Howell 1944-6-25 19663 Marin Near Chinese Camp Comment
  CAS-BOT-BC295437  Erigeron karvinskianus John Thomas Howell 1947-5-4 23135 Marin San Rafael Comment
  HSC2231  Erigeron petrophilus var. petrophilus J. T. Howell 1942-7-12 17034 Marin Northside Trail Mt. Tamalpais Comment
  CAS-BOT-BC300241  Erigeron reductus var. angustatus John Thomas Howell 1972-6-18 48875 Marin Above Vista de la Bahia at north end of Tiburon Peninsula Comment
  UC1177267  Erigeron reductus var. angustatus John Thomas Howell 1946-7-7 22197 Marin burned area s Barths Retreat; Mt. Tamalpais Comment
  CAS-BOT-BC216088  Eriodictyon californicum John Thomas Howell 1944-6-4 19533 Marin Inverness Ridge Comment
  CAS-BOT-BC216089  Eriodictyon californicum John Thomas Howell 1946-5-12 21808 Marin Carson Ridge Comment
  CAS-BOT-BC216090  Eriodictyon californicum John Thomas Howell 1939-6-18 14770 Marin Near Mud Lake Comment
  RSA66182  Eriogonum caninum J. T. Howell 1937-7-4 13088 Marin Tiburon. Comment
  CAS-BOT-BC259187  Eriogonum latifolium John Thomas Howell 1945-7-1 s.n. Marin Tiburon Comment
  CAS-BOT-BC259189  Eriogonum latifolium John Thomas Howell 1939-7-2 14815 Marin Hills sw. of Almonte Comment
  CAS-BOT-BC259191  Eriogonum latifolium John Thomas Howell 1939-7-2 14825 Marin Ridge between Tennessee Cove and Pirates Cove Comment
  CAS-BOT-BC266052  Eriogonum latifolium John Thomas Howell 1933-10-8 11705 Marin Pt. Reyes Peninsula Comment
  UC1176911  Eriogonum latifolium John Thomas Howell 1939-7-2 14825 Marin ridge between Tennessee Cove and Pirates Cove Comment
  CAS-BOT-BC259199  Eriogonum latifolium John Thomas Howell 1966-5-25 41532 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  RSA244  Eriogonum luteolum J. T. Howell 1927-8-22 675 Marin Rock Spring Trail, Mt Tamalpais 549 Comment
  CAS-BOT-BC259491  Eriogonum luteolum var. caninum John Thomas Howell 1937-7-4 13088 Marin Tiburon Comment
  CAS-BOT-BC259498  Eriogonum luteolum var. caninum John Thomas Howell 1937-7-4 13088 Marin Tiburon Comment
  CAS-BOT-BC259504  Eriogonum luteolum var. caninum John Thomas Howell 1927-8-22 3037 Marin Rock Spring Trail, west of West Point, Mt. Tamalpais 548 Comment
  CAS-BOT-BC259505  Eriogonum luteolum var. caninum John Thomas Howell 1937-7-4 13088 Marin Tiburon Comment
  CAS-BOT-BC259520  Eriogonum luteolum var. caninum John Thomas Howell 1945-8-12 21375 Marin Near Mt. Theater, Mt. Tamalpais Comment
  CAS-BOT-BC259521  Eriogonum luteolum var. caninum John Thomas Howell 1945-9-2 s.n. Marin Black Canyon, San Raphael [Rafael] Hills Comment
  UC1176909  Eriogonum luteolum var. caninum John Thomas Howell 1945-9-2 Marin Black Canyon San rafael Hills Comment
  CAS-BOT-BC268919  Eriogonum nudum var. auriculatum John Thomas Howell 1941-6-8 16260 Marin Hills ne. of San Rafael Comment
  CAS-BOT-BC268924  Eriogonum nudum var. auriculatum John Thomas Howell 1945-7-8 21288 Marin San Antonio Station Comment
  CAS-BOT-BC268925  Eriogonum nudum var. auriculatum John Thomas Howell 1939-7-2 14841 Marin Between Big Lagoon and Muir Woods Comment
  CAS-BOT-BC268932  Eriogonum nudum var. auriculatum John Thomas Howell 1945-7-4 s.n. Marin Inverness Ridge Comment
  UC1176912  Eriogonum nudum var. auriculatum John Thomas Howell 1939-7-2 14841 Marin between Big Lagoon and Muir Woods Comment
  SBBG28196  Eriogonum vimineum J. T. Howell 1937-7-4 13088 Marin Tiburon Comment
  CAS-BOT-BC297985  Eriophyllum confertiflorum John Thomas Howell 1950-6-11 26628 Marin Throckmorton Ridge at railroad grade, Mt Tamalpais Comment
  CAS-BOT-BC301193  Eriophyllum lanatum var. arachnoideum John Thomas Howell 1930-4-20 4737 Marin Pt. Reyes Comment
  CAS-BOT-BC301211  Eriophyllum lanatum var. arachnoideum John Thomas Howell 1942-6-21 16985 Marin Carson Ridge Comment
  UC1176889  Eriophyllum lanatum var. arachnoideum John Thomas Howell 1939-4-23 14602 Marin Blythedale Canyon , Mill Valley Comment
  UC1176890  Eriophyllum lanatum var. arachnoideum John Thomas Howell 1939-5-28 7395 Marin Pt. Reyes Lighthouse Comment
  CAS-BOT-BC301199  Eriophyllum lanatum var. arachnoideum John Thomas Howell 1927-5-8 2373 Marin North side of Mt. Tamalpais Comment
  CAS-BOT-BC301210  Eriophyllum lanatum var. arachnoideum John Thomas Howell 1939-4-23 14602 Marin Blythedale Canyon, Mill Valley Comment
  CDA4361  Erodium botrys J. T. Howell 1947-4-13 23058 Marin Tiburon Peninsula. 0 Comment
  RSA51276  Erodium botrys J. T. Howell 1947-4-13 23058 Marin Tiburon Peninsula. Comment
  CDA4371  Erodium brachycarpum J. T. Howell 1947-4-23 23075 Marin Point Reyes Peninsula, on east side of Drakes Estero. 0 Comment
  SD71226  Eryngium aristulatum John Thomas Howell 1946-9-15 23006 Marin Hidden Lake, Mt. Tamalpais. Comment
  POM203971  Eryngium armatum J. T. Howell 1933-7-30 11466 Marin 1.5 miles north of Olema Comment
  CAS-BOT-BC54715  Erysimum cheiranthoides John Thomas Howell 1990-9-28 s.n. Marin At Northgate, San Rafael. Comment
  CAS-BOT-BC54767  Erysimum franciscanum John Thomas Howell 1940-3-10 15389 Marin Rocks southeast of Muir Woods. Comment
  CAS-BOT-BC403200  Eschscholzia californica John Thomas Howell 1945-6-12 s.n. Marin Pt. Reyes Dunes Comment
  CAS-BOT-BC403201  Eschscholzia californica John Thomas Howell 1944-6-4 19554 Marin Inverness Ridge west of Inverness Comment
  UC1176768  Eschscholzia californica John Thomas Howell 1944-6-4 19554 Marin w Inverness; Inverness Ridge Comment
  CAS-BOT-BC124306  Euphorbia glyptosperma J. T. Howell 1988-7-14 s.n. Marin Terra Linda Community Gardens. Comment
  CAS-BOT-BC124308  Euphorbia maculata J. T. Howell 1988-7-20 s.n. Marin Terra Linda Community Gardens. Comment
  UCD142684  Euphorbia prostrata John Thomas Howell 1942-7-6 23328 Marin Mill Valley. Comment
  UC1177268  Eurybia radulina J. Thomas Howell 1946-9-15 23003 Marin near, (Mt. Tamalpais) Potrero Meadows; Mt. Tamalpais Comment
  CAS-BOT-BC312216  Eurybia radulina John Thomas Howell 1946-9-15 23003 Marin Near Potrero Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC312217  Eurybia radulina John Thomas Howell 1946-9-15 23003 Marin Near Potrero Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC278323  Festuca californica subsp. californica John Thomas Howell 1943-5-15 18086 Marin Tiburon Peninsula Comment
  CAS-BOT-BC278327  Festuca californica subsp. californica John Thomas Howell 1946-5-16 21888 Marin Angel Island Comment
  CAS-BOT-BC278328  Festuca californica subsp. californica John Thomas Howell 1941-5-25 16205 Marin Arturo Trail, Mt. Tamalpais Comment
  CAS-BOT-BC278333  Festuca californica subsp. californica John Thomas Howell 1938-6-19 13920 Marin Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC282503  Festuca elmeri John Thomas Howell 1944-7-7 s.n. Marin Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC282506  Festuca elmeri John Thomas Howell 1947-5-4 23121 Marin San Rafael Hills Comment
  CAS-BOT-BC282507  Festuca elmeri John Thomas Howell 1948-5-22 24310 Marin Above Phoenix Lake, Mt. Tamalpais Comment
  CAS-BOT-BC282508  Festuca elmeri John Thomas Howell 1945-5-13 20860 Marin Fairfax Hills n. of Phoenix Lake Comment
  CAS-BOT-BC282511  Festuca elmeri John Thomas Howell 1943-5-22 18121 Marin Deer Park near Fairfax Comment
  UC1106095  Festuca elmeri John Thomas Howell 1943-5-22 18121 Marin near Fairfax; Deer Park Comment
  UC926374  Festuca elmeri John Thomas Howell 1948-5-22 1534 Marin Phoenix Lake Mount Tamalpais Comment
  CAS-BOT-BC282513  Festuca elmeri John Thomas Howell 1944-7-7 19674 Marin Fish Grade between Phoenix and Lagunitas Lakes Comment
  CAS-BOT-BC278439  Festuca idahoensis John Thomas Howell 1944-5-21 19492 Marin Lagunitas Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC278444  Festuca idahoensis John Thomas Howell 1942-6-21 16996 Marin Carson Ridge Comment
  CAS-BOT-BC278445  Festuca idahoensis John Thomas Howell 1943-5-15 18084 Marin Tiburon Peninsula Comment
  RSA127381  Festuca idahoensis J. T. Howell 1941-5-25 16208 Marin Rifle camp, Mt. Tamalpais. Comment
  SEINET10559298  Festuca idahoensis John Thomas Howell 1947-4-4 Howell s.n. Marin Black Canyon, Comment
  CAS-BOT-BC278821  Festuca occidentalis John Thomas Howell 1946-6-2 21989 Marin Lake Lagunitas, Mt. Tamalpais Comment
  CAS-BOT-BC278823  Festuca occidentalis John Thomas Howell 1945-5-27 20888 Marin Railroad grade at Fern Canyon, Mt. Tamalpais Comment
  UC1106091  Festuca occidentalis John Thomas Howell 1946-6-2 21989 Marin Lake Lagunitas Mt. Tamalpais Comment
  UC1106094  Festuca roemeri John Thomas Howell 1943-5-15 18084 Marin Tiburon Peninsula Comment
  CAS-BOT-BC278983  Festuca rubra John Thomas Howell 1943-6-8 18220 Marin Tiburon Comment
  CAS-BOT-BC278986  Festuca rubra John Thomas Howell 1939-6-18 14780 Marin Near Mud Lake Comment
  CAS-BOT-BC278987  Festuca rubra John Thomas Howell 1939-5-21 14693 Marin South end of Tiburon Peninsula Comment
  CAS-BOT-BC278989  Festuca rubra John Thomas Howell 1944-6-4 19561 Marin Near Mt. Vision west of Inverness Comment
  CAS-BOT-BC278993  Festuca rubra John Thomas Howell 1943-5-22 18127 Marin Deer Park near Fairfax Comment
  CAS-BOT-BC278996  Festuca rubra John Thomas Howell 1944-6-4 19561 Marin Near Mt. Vision west of Inverness Comment
  CAS-BOT-BC278997  Festuca rubra John Thomas Howell 1944-6-4 19556 Marin Inverness Ridge west of Inverness Comment
  CAS-BOT-BC278998  Festuca rubra John Thomas Howell 1939-6-4 s.n. Marin Pt. Reyes Lighthouse Comment
  UC1106092  Festuca rubra John Thomas Howell 1944-6-6 19556 Marin w of Inverness; Inverness Ridge Comment
  CAS-BOT-BC457934  Fragaria vesca subsp. californica John Thomas Howell 1945-6-3 20931 Marin Shell Beach Comment
  CAS-BOT-BC52585  Frangula californica subsp. californica John Thomas Howell 1966-5-25 41546 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC223775  Frankenia salina John Thomas Howell 1944-6-25 19657 Marin Between Santa Venetia and Chinese Camp Comment
  RSA67157  Galium californicum subsp. californicum J. T. Howell 1930-7-20 5381 Marin Just S of Phoenix Lake. Comment
  LA208423  Galium californicum subsp. flaccidum John Thomas Howell; 1930-7-20 5381 Marin Shaded slope just S of Phoenix Lake, Marin Co Comment
  JEPS58888  Galium murale John Thomas Howell 1947-7-6 23324 Marin Laurel Dell Mt. Tamalpais Comment
  UCD121879  Galium parisiense John Thomas Howell 1942-6-7 16973 Marin San Anselmo Canyon above Fairfax. Comment
  JEPS58887  Galium trifidum var. pacificum John Thomas Howell 1945-8-5 21366 Marin near Stinson Beach Comment
  CAS-BOT-BC192192  Garrya fremontii John Thomas Howell 1942-9-6 17864 Marin Northside Trail, Mt. Tamalpais Comment
  POM298988  Garrya fremontii J. T. Howell 1942-9-6 17864 Marin Northside Trail, Mt. Tamalpais. Comment
  CAS-BOT-BC282629  Gastridium phleoides John Thomas Howell 1946-5-16 s.n. Marin Angel Island Comment
  RSA0029461  Geranium solanderi J. T. Howell 1944-7-9 19714 Marin South of Tomales Bay Comment
  CAS-BOT-BC225291  Gilia capitata subsp. chamissonis John Thomas Howell 1945-6-12 s.n. Marin Pt. Reyes dunes Comment
  JEPS58878  Githopsis specularioides John Thomas Howell 1943-5-9 17974 Marin San Rafael Hills Comment
  CAS-BOT-BC303648  Glebionis coronaria John Thomas Howell 1944-9-24 20764 Marin Bolinas Comment
  RSA121031  Glinus lotoides J. T. Howell 1956-9-13 31875 Marin Strand of Bon Tempe Reservoir. Comment
  UCD66782  Glyceria declinata John Thomas Howell 1957-7-22 32817 Marin 2 miles south of Olema. Comment
  CAS-BOT-BC282802  Glyceria leptostachya John Thomas Howell 1946-6-13 22039 Marin Chileno Valley Comment
  CAS-BOT-BC282804  Glyceria leptostachya John Thomas Howell 1943-6-6 18198 Marin Between Mill Valley and Muir Woods Comment
  SEINET199917 Image available Glyceria leptostachya J. T. Howell 1943-6-6 18198 Marin Between Mill Valley and Muir Woods Comment
  SEINET10605490  Glyceria leptostachya John Thomas Howell 1946-6-16 Howell 22077 Marin Olerna Marshes. Comment
  CAS-BOT-BC302620  Gnaphalium palustre John Thomas Howell 1942-7-12 s.n. Marin Potrero Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC302621  Gnaphalium palustre John Thomas Howell 1946-8-23 22894 Marin Pierce Pt. road, Pt. Reyes Peninsula Comment
  CAS-BOT-BC302623  Gnaphalium palustre John Thomas Howell 1946-7-7 22213 Marin Potrero Meadow, Mt. Tamalpais Comment
  RSA128809  Gnaphalium palustre J. T. Howell 1946-8-23 22894 Marin Pierce Point Road, Point Reyes Peninsula. Comment
  JEPS58944  Gratiola ebracteata John Thomas Howell 1941-6-10 16297 Marin 9 mi w Novato Comment
  JEPS58945  Gratiola ebracteata John Thomas Howell 1945-5-9 20839 Marin between Hamilton Field and Ignacio; between Hamilton Field and Ignacio Comment
  POM203455  Grindelia camporum J. T. Howell 1933-7-30 11462 Marin San Anselmo. Comment
  CAS-BOT-BC304427  Grindelia hirsutula John Thomas Howell 1933-7-30 11485 Marin Shores of Bolinas Bay Comment
  CAS-BOT-BC304428  Grindelia hirsutula John Thomas Howell 1933-7-30 11482 Marin At Inverness Comment
  CAS-BOT-BC304429  Grindelia hirsutula John Thomas Howell 1933-7-30 11472 Marin At head of Tomales Bay Comment
  CAS-BOT-BC304430  Grindelia hirsutula John Thomas Howell 1933-7-30 11482 Marin At Inverness Comment
  CAS-BOT-BC304433  Grindelia hirsutula John Thomas Howell 1944-7-9 19719 Marin South of Tomales Bay Comment
  CAS-BOT-BC304437  Grindelia hirsutula John Thomas Howell 1939-9-3 15330 Marin Corte Madera Comment
  CAS-BOT-BC304439  Grindelia hirsutula John Thomas Howell 1933-10-8 11710 Marin Pt. Reyes Peninsula Comment
  CAS-BOT-BC304475  Grindelia hirsutula John Thomas Howell 1925-4-5 896 Marin Pipeline Trail Comment
  CAS-BOT-BC304492  Grindelia hirsutula John Thomas Howell 1939-7-2 14830 Marin Ridge between Tennessee Cove and Pirates Cove Comment
  CAS-BOT-BC304501  Grindelia hirsutula John Thomas Howell 1947-5-14 23167 Marin McClure Beach Comment
  CAS-BOT-BC304815  Grindelia hirsutula J. T. Howell 1933-10-8 11701 Marin Pt. Reyes Comment
  CAS-BOT-BC314434  Grindelia hirsutula John Thomas Howell 1933-7-30 11483 Marin Head of Tomales Bay Comment
  CAS-BOT-BC314435  Grindelia hirsutula John Thomas Howell 1933-7-30 11483 Marin Between Inverness and Pt. Reyes Station Comment
  CAS-BOT-BC314448  Grindelia hirsutula John Thomas Howell 1946-6-20 22110 Marin 4 mi. S. of Olema Comment
  CAS-BOT-BC314450  Grindelia hirsutula John Thomas Howell 1945-9-16 21491 Marin Along railroad north of San Rafael Comment
  CAS-BOT-BC314451  Grindelia hirsutula John Thomas Howell 1943-5-22 18149 Marin Fairfax hills Comment
  CAS-BOT-BC314456  Grindelia hirsutula John Thomas Howell 1945-7-1 21265 Marin Tiburon Comment
  CAS-BOT-BC314458  Grindelia hirsutula John Thomas Howell 1933-4-12 10998 Marin Sausalito Hills Comment
  CAS-BOT-BC314459  Grindelia hirsutula John Thomas Howell 1944-5-7 19437 Marin Baltimore Park Comment
  CAS-BOT-BC314460  Grindelia hirsutula John Thomas Howell 1939-5-21 14697 Marin South end of Tiburon Peninsula Comment
  CAS-BOT-BC314461  Grindelia hirsutula John Thomas Howell 1945-5-9 20820 Marin Hamilton Field Comment
  CAS-BOT-BC314469  Grindelia hirsutula John Thomas Howell 1945-7-1 21265 Marin Tiburon Comment
  CAS-BOT-BC314470  Grindelia hirsutula John Thomas Howell 1945-7-1 21265 Marin Tiburon Comment
  CAS-BOT-BC314471  Grindelia hirsutula John Thomas Howell 1945-7-15 21292 Marin Ridgecrest Blvd. at Fairfax city limits Comment
  CAS-BOT-BC314473  Grindelia hirsutula John Thomas Howell 1941-6-10 16290 Marin Black Point Comment
  RSA127088  Grindelia hirsutula J. T. Howell 1946-6-20 22097 Marin Between Muir Beach and Stinson Beach. Comment
  UC1176893  Grindelia hirsutula John Thomas Howell 1946-5-16 21860 Marin se side Angel Island; se side Angel Island Comment
  UC1176896  Grindelia hirsutula John Thomas Howell 1939-9-3 15330 Marin Corte Madera salt marsh Comment
  UC1176897  Grindelia hirsutula John Thomas Howell 1945-7-15 21292 Marin Ridgecrest Blvd at Fairfax City limits Comment
  UC1176898  Grindelia hirsutula John Thomas Howell 1946-5-16 21882 Marin w side Angel Island Comment
  CAS-BOT-BC304436  Grindelia hirsutula John Thomas Howell 1954-10-21 30113 Marin Tamalpais Valley Comment
  CAS-BOT-BC304442  Grindelia hirsutula John Thomas Howell 1930-10-5 5524 Marin 2 miles west of Marin--Sonoma Co. line, at n. end of San Pablo Bay Comment
  CAS-BOT-BC304472  Grindelia hirsutula John Thomas Howell 1944-9-3 20717 Marin Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC314440  Grindelia hirsutula John Thomas Howell 1945-7-29 21362 Marin Mouth of Rio Honda north of Bolinas Comment
  CAS-BOT-BC314449  Grindelia hirsutula John Thomas Howell 1930-6-22 5320 Marin Hillsides at Fort Baker Comment
  POM203454  Grindelia stricta var. angustifolia J. T. Howell 1933-7-30 11483 Marin Head of Tomales Bay Comment
  UC1106257  Guillenia lasiophylla John Thomas Howell 1943-4-11 17904 Marin Black Canyon, San Rafael hills San Rafael Comment
  UC1177250  Guillenia lasiophylla John Thomas Howell 1940-5-12 15429 Marin between Little Carson and Carson Ridge Comment
  CAS-BOT-BC306274  Hedypnois cretica John Thomas Howell 1947-6-18 23278 Marin Near Dillons Beach Comment
  UC1177287  Hedypnois rhagadioloides John Thomas Howell 1947-6-18 23278 Marin near Dillons Beach Comment
  CAS-BOT-BC309452  Helenium puberulum John Thomas Howell 1945-8-19 21436 Marin Head of Drakes Bay Comment
  UC1177312  Helenium puberulum John Thomas Howell 1939-7-2 14833 Marin Pirates Cove Comment
  CAS-BOT-BC223996  Helianthemum scoparium John Thomas Howell 1946-7-7 22195 Marin South of Barths Retreat, Mt. Tamalpais Comment
  CAS-BOT-BC223997  Helianthemum scoparium John Thomas Howell 1947-5-18 23180 Marin Carson Ridge Comment
  CAS-BOT-BC223998  Helianthemum scoparium John Thomas Howell 1946-5-12 21809 Marin Carson Ridge Comment
  CAS-BOT-BC306192  Hemizonia congesta subsp. congesta John Thomas Howell 1946-6-13 22046 Marin East of Aurora School at Sonoma Co. line Comment
  CAS-BOT-BC306194  Hemizonia congesta subsp. congesta John Thomas Howell 1945-7-29 21337 Marin Bolinas Comment
  CAS-BOT-BC306195  Hemizonia congesta subsp. congesta John Thomas Howell 1946-9-8 22989 Marin Near Ignacio Comment
  CAS-BOT-BC306252  Hemizonia congesta subsp. lutescens John Thomas Howell 1946-9-8 22991 Marin Near Ignacio Comment
  CAS-BOT-BC309621  Hemizonia congesta subsp. lutescens John Thomas Howell 1957-9-15 32958 Marin Near Mill Valley Comment
  CAS-BOT-BC309636  Hemizonia congesta subsp. lutescens John Thomas Howell 1944-5-14 19455 Marin Pt. Reyes Station Comment
  JEPS12626  Hemizonia congesta subsp. lutescens John Thomas Howell 1924-8-31 648 Marin near Phoenix Lake Comment
  UC1106276  Hemizonia congesta subsp. lutescens John Thomas Howell 1940-6-9 Marin Tiburon Comment
  CAS-BOT-BC309633  Hemizonia congesta subsp. lutescens John Thomas Howell 1966-4-6 41466 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC310182  Hesperevax sparsiflora var. brevifolia John Thomas Howell 1944-6-4 19566 Marin Near Mt. Vision west of Inverness Comment
  CAS-BOT-BC310220  Hesperevax sparsiflora var. sparsiflora John Thomas Howell 1940-5-26 15530 Marin Little Carson Falls Comment
  CAS-BOT-BC310223  Hesperevax sparsiflora var. sparsiflora John Thomas Howell 1947-4-13 s.n. Marin Tiburon Peninsula Comment
  CAS-BOT-BC310221  Hesperevax sparsiflora var. sparsiflora John Thomas Howell 1930-4-20 4720 Marin 1 mile from Lagunitas on road to San Rafael Comment
  UC1176756  Hesperocnide tenella John Thomas Howell 1945-6-30 Marin Mt. Tamalpais Comment
  UC1177446  Hesperolinon micranthum John Thomas Howell 1946-7-7 22192 Marin s of Barths Retreat; Mt. Tamalpais Comment
  JEPS58877  Heterocodon rariflorum John Thomas Howell 1946-6-2 21974 Marin Rocky Ridge Fire Trail Mt. Tamalpais (Mt. Tamalpais) Comment
  SEINET10460709  Heterocodon rariflorum Howell Howell 21974 Marin MT TAMALPAIS, ROCKY RIDGE FIRE TRAIL Comment
  SEINET10460727  Heterocodon rariflorum Howell 1940-5-12 Howell 15421 Marin Lagunitas Creek Comment
  UCD72557  Heterocodon rariflorum John Thomas Howell 1940-5-12 15421 Marin Lagunitas Creek. Comment
  RSA0075927  Heterotheca oregona J. T. Howell 1945-9-16 21498 Marin Along railroad north of San Rafael. Comment
  POM273137  Heterotheca oregona var. rudis J. T. Howell 1945-9-16 21498 Marin North of San Rafael and east of Santa Venetia Comment
  CAS-BOT-BC311172  Heterotheca sessiliflora subsp. bolanderi John Thomas Howell 1939-7-2 14831 Marin Ridge between Tennessee Cove and Pirates Cove Comment
  CAS-BOT-BC311175  Heterotheca sessiliflora subsp. bolanderi John Thomas Howell 1945-7-15 21304 Marin Near Meadow Club near Fairfax Comment
  RSA471594  Heterotheca sessiliflora subsp. bolanderi J. T. Howell 1933-7-30 11467 Marin 1.5 miles north of Olema Comment
  UC1176733  Heuchera pilosissima John Thomas Howell 1949-6-7 25346 Marin Dillons Beach Comment
  CAS-BOT-BC55363  Hirschfeldia incana John Thomas Howell 1939-6-25 14804 Marin Mill Valley. Summit Avenue. Comment
  UC1177257  Hirschfeldia incana John Thomas Howell 1942-6-21 17002 Marin Fairfax Comment
  CAS-BOT-BC280756  Holcus lanatus John Thomas Howell 1945-7-29 21355 Marin Bolinas Comment
  SEINET195275 Image available Holcus lanatus John Thomas Howell 1945-7-29 21355 Marin Bolinas 3 Comment
  UCD84897  Holcus lanatus John Thomas Howell 1945-7-29 21355 Marin Bolinas. Comment
  CAS-BOT-BC280753  Holcus lanatus John Thomas Howell 1947-5-14 23171 Marin Near Ledum Swamp, Pt. Reyes Peninsula Comment
  RSA91982  Holcus lanatus J. T. Howell 1945-7-29 21355 Marin Bolinas. Comment
  SEINET10591423  Holcus lanatus John Thomas Howell 1945-7-29 Howell 21355 Marin Bolinas. Viviparous form, normal plants abundant, only two viviparous plants seen. Comment
  UC1598599  Holocarpha virgata subsp. virgata John Thomas Howell 1956-9-13 31876 Marin near Lake Lagunitas; Lagunitas Meadows Comment
  CAS-BOT-BC149971  Holodiscus discolor var. discolor John Thomas Howell 1938-5-22 13797 Marin San Anselmo Canyon Comment
  POM273136  Holozonia filipes J. T. Howell 1945-8-12 21372 Marin Rock Spring, Mt Tamalpais Comment
  UC750609  Holozonia filipes John Thomas Howell 1945-8-12 21372 Marin Rock Spring Mt. Tamalpais, Rock Spring Comment
  UC1106128  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell 1944-5-28 Marin Mill Valley Comment
  CAS-BOT-BC289500  Hordeum brachyantherum subsp. californicum John Thomas Howell 1943-5-15 18068 Marin Tiburon Peninsula Comment
  CAS-BOT-BC289501  Hordeum brachyantherum subsp. californicum John Thomas Howell 1948-5-31 24328 Marin Devil's Gulch near Camp Taylor Comment
  UC1106127  Hordeum brachyantherum subsp. californicum John Thomas Howell 1948-5-31 24328 Marin near Camp Taylor (Devils Gulch) Comment
  CAS-BOT-BC284996  Hordeum depressum John Thomas Howell 1947-4-13 23057 Marin Tiburon Peninsula Comment
  CAS-BOT-BC284997  Hordeum depressum John Thomas Howell 1966-4-18 41491 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  RSA127273  Hordeum depressum J. T. Howell 1947-4-13 23057 Marin Tiburon Peninsula Comment
  CAS-BOT-BC289344  Hordeum murinum subsp. glaucum John Thomas Howell 1949-4-10 25306 Marin South end of Tiburon Peninsula Comment
  CAS-BOT-BC289345  Hordeum murinum subsp. glaucum John Thomas Howell 1949-4-24 25307 Marin Fort McDowll, Angel Island Comment
  UCD86231  Hordeum murinum subsp. glaucum John Thomas Howell 1949-4-24 25307 Marin Angel Island. Fort McDowell. Comment
  UC1106130  Hordeum murinum subsp. leporinum John Thomas Howell 1939-5-28 Marin Almonte Comment
  CAS-BOT-BC273523  Hordeum vulgare John Thomas Howell 1949-6-7 25342 Marin Aurora School, nw. Marin Co. Comment
  POM179705  Horkelia californica J. T. Howell 1930-6-22 5323 Marin Valley above Rodeo Lagoon Comment
  UC1177242  Horkelia californica John Thomas Howell 1945-7-29 21346 Marin Bolinas Comment
  CAS-BOT-BC536635  Horkelia californica John Thomas Howell 1946-6-13 22059 Marin Estero School north of Dillon Beach Comment
  CAS-BOT-BC536640  Horkelia californica John Thomas Howell 1930-6-22 5323 Marin Rodeo Lagoon Comment
  RSA299145  Horkelia marinensis J. T. Howell, Catherine Best, Wilma Follette, Gordon True 1980-6-19 53719 Marin Near Abbott's Lagoon, Point Reyes Peninsula. Comment
  CAS-BOT-BC400877  Hypericum anagalloides John Thomas Howell 1939-7-2 14817 Marin Elk Valley Comment
  UC1177422  Hypericum formosum var. scouleri John Thomas Howell 1947-7-6 23322 Marin between Rock Spring and Laurel Dell (Mt. Tamalpais); Mt. Tamalpais Comment
  CAS-BOT-BC401396  Hypericum scouleri John Thomas Howell 1942-7-12 17029 Marin Potrero Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC311327  Hypochaeris glabra John Thomas Howell 1948-6-6 24333 Marin Bolinas Bay Sand Spit Comment
  CAS-BOT-BC133627  Iris longipetala John Thomas Howell 1946-5-16 21852 Marin Angel Island, se. side Comment
  CAS-BOT-BC133628  Iris longipetala John Thomas Howell 1946-5-4 21709 Marin East of Aurora School at Sonoma Co. line Comment
  CAS-BOT-BC69913  Isoetes howellii John Thomas Howell 1947-5-25 23204 Marin Willow Meadow, Mt. Tamalpais. Comment
  UC1177514  Isoetes howellii John Thomas Howell 1947-5-25 23204 Marin Mt. Tamalpais, Willow Meadow Comment
  CAS-BOT-BC112391  Isolepis carinata John Thomas Howell 1943-5-22 18154 Marin Lagunitas Meadows Comment
  CAS-BOT-BC112393  Isolepis carinata John Thomas Howell 1927-5-8 2369 Marin Low place in grassland north of Lake Lagunitas Comment
  POM196451  Isolepis carinata J. T. Howell 1927-5-8 2369 Marin North of Lake Lagunitas. Comment
  CAS-BOT-BC112467  Isolepis cernua John Thomas Howell 1936-6-7 12649 Marin Ledum Swamp on road to Pt. Reyes Comment
  CAS-BOT-BC112469  Isolepis cernua John Thomas Howell 1966-6-9 41561 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC112468  Isolepis cernua John Thomas Howell 1933-7-30 11473 Marin North of Lagunitas Creek Comment
  CAS-BOT-BC112470  Isolepis cernua John Thomas Howell 1941-7-6 s.n. Marin Kent Trail at Willow Mdws., Mt Tamalpais. Comment
  CAS-BOT-BC340181  Jaumea carnosa John Thomas Howell 1945-6-30 21255 Marin Stinson Beach Comment
  UC1177402  Juncus covillei John Thomas Howell 1945-8-12 21373 Marin near Rock Spring; Mt. Tamalpais Comment
  UC1177401  Juncus effusus subsp. pacificus John Thomas Howell 1943-7-4 18252 Marin on road to Pt. Reyes Ledum Swamp Comment
  RSA127067  Juncus kelloggii J. T. Howell 1949-5-25 25337 Marin Point Reyes Peninsula. Comment
  RSA201505  Juncus kelloggii J. T. Howell 1967-6-8 42549 Marin northern Nat l Seashore beach area, Pont Reyes Peninsula Comment
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Feb 27 2013
  UC1106299  Juncus kelloggii John Thomas Howell 1949-5-25 25337 Marin Point Reyes Peninsula Comment
  UCD141561  Juncus kelloggii John Thomas Howell 1967-6-8 42549 Marin northern National Seashore beach area, Point Reyes Peninsula. Comment
  RSA127063  Juncus lescurii J. T. Howell 1945-7-29 21349 Marin Bolinas. Comment
  UC1177398  Juncus mexicanus John Thomas Howell 1947-5-21 23188 Marin Tiburon Comment
  UC1177405  Juncus mexicanus John Thomas Howell 1947-5-18 23183 Marin Lagunitas Meadows Comment
  RSA127068  Juncus mexicanus J. T. Howell 1947-5-18 23183 Marin Lagunitas Meadows. Comment
  UC1177382  Juncus patens John Thomas Howell 1944-6-25 19647 Marin Santa Venetia Comment
  UC1106291  Juncus phaeocephalus John Thomas Howell 1939-10-1 15362 Marin Lake Lagunitas Comment
  RSA127070  Juncus phaeocephalus var. paniculatus J. T. Howell 1941-7-6 16363 Marin Hidden Lake, Mt. Tamalpais. Comment
  CAS-BOT-BC235896  Keckiella corymbosa John Thomas Howell 1946-7-7 22187 Marin Above Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC180840  Kochia scoparia John Thomas Howell 1988-7-28 s.n. Marin Terra Linda Vegetable Garden, New Albion Way opposite Cermenho Ct., San Rafael Comment
  CAS-BOT-BC175935  Koeleria macrantha John Thomas Howell 1966-5-25 41545 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  UC1106120  Koeleria macrantha John Thomas Howell 1941-5-25 16212 Marin Rifle Camp Mt. Tamalpais (Mt. Tamalpais); , Rifle Camp Comment
  CAS-BOT-BC271350  Koeleria pyramidata John Thomas Howell 1939-5-21 s.n. Marin Shelter Cove, Tiburon Comment
  CAS-BOT-BC271301  Koeleria pyramidata John Thomas Howell 1939-5-21 s.n. Marin S. Tiburon Comment
  CAS-BOT-BC272312  Lachnagrostis filiformis John Thomas Howell 1987-7-7 s.n. Marin Terra Linda Vegetable Garden, New Albion Way opposite Cermenho Court Comment
  CAS-BOT-BC272314  Lachnagrostis filiformis John Thomas Howell 1945-7-15 21290 Marin Fairfax Comment
  CDA7510  Lactuca saligna J. T. Howell 1943-9-5 19324 Marin San Francisco Bay Region; Southern part of Mill Valley. Comment
  JEPS3932  Lactuca saligna John Thomas Howell 1943-9-5 19324 Marin in s part Mill Valley 7 Comment
  CAS-BOT-BC340453  Lactuca saligna John Thomas Howell 1966-4-18 41494 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  RSA40158  Lactuca saligna J. T. Howell 1943-9-25 19324 Marin Southern part of valley. 8 Comment
  UC1177283  Lactuca serriola John Thomas Howell 1939-11-5 Marin Manzanita Comment
  CAS-BOT-BC341498  Lagophylla ramosissima John Thomas Howell 1945-9-2 21453 Marin San Rafael Hills Comment
  CAS-BOT-BC341499  Lagophylla ramosissima John Thomas Howell 1944-6-25 19656 Marin Santa Venetia Comment
  CAS-BOT-BC337872  Lapsana communis John Thomas Howell 1939-8-27 15306 Marin Ross Comment
  CAS-BOT-BC338177  Lasthenia californica John Thomas Howell 1946-4-14 21635 Marin Near Dillons Beach Comment
  CAS-BOT-BC338179  Lasthenia californica John Thomas Howell 1947-4-30 23115 Marin Dillons Beach Comment
  CAS-BOT-BC338176  Lasthenia californica John Thomas Howell 1947-4-23 23069 Marin Drakes Estero west of Mt. Vision Comment
  CAS-BOT-BC338178  Lasthenia californica John Thomas Howell 1938-5-28 s.n. Marin Pt. Reyes Light-house Comment
  UC1106188  Lasthenia californica subsp. californica John Thomas Howell 1947-4-30 23115 Marin Dillons Beach Comment
  CAS-BOT-BC355188  Lasthenia glaberrima John Thomas Howell 1944-5-21 19495 Marin Lagunitas Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC355476  Lasthenia glaberrima John Thomas Howell 1946-4-18 21642 Marin Ignacio Comment
  CAS-BOT-BC355477  Lasthenia glaberrima John Thomas Howell 1946-5-4 21719 Marin East of Aurora School at Sonoma Co. line Comment
  CAS-BOT-BC355478  Lasthenia glaberrima John Thomas Howell 1945-5-9 20827 Marin Between Hamilton Field and Ignacio Comment
  CAS-BOT-BC355479  Lasthenia glaberrima John Thomas Howell 1941-6-10 16305 Marin 9 mi. W of Novato Comment
  UC1106186  Lasthenia glaberrima John Thomas Howell 1945-5-9 20827 Marin between Hamilton Field and Ignacio Comment
  CAS-BOT-BC366966  Lasthenia minor John Thomas Howell 1930-4-20 4733 Marin Pt Reyes Comment
  CAS-BOT-BC366967  Lasthenia minor John Thomas Howell 1930-4-20 4733 Marin Pt Reyes Comment
  UC421671  Lasthenia minor John Thomas Howell 1930-4-20 4733 Marin Pt. Reyes Comment
  POM193969  Lasthenia minor J. T. Howell 1930-4-20 4733 Marin Pt. Reyes. Comment
  CDA4164  Lathyrus tingitanus J. T. Howell 1945-7-1 21260 Marin Tiburon. 0 Comment
  RSA201419  Lathyrus tingitanus J. T. Howell 1959-5-21 34595 A Marin Inverness Comment
  UCD106690  Lathyrus tingitanus John Thomas Howell 1945-7-1 21260 Marin Tiburon. Comment
  RSA44361  Lathyrus vestitus subsp. bolanderi J. T. Howell 1940-5-20 15516 Marin Point Reyes Comment
  CAS-BOT-BC323977  Layia chrysanthemoides John Thomas Howell 1944-5-14 19474 Marin Chileno Valley Comment
  CAS-BOT-BC323978  Layia chrysanthemoides John Thomas Howell 1946-4-18 21678 Marin Novato Comment
  CAS-BOT-BC323976  Layia chrysanthemoides John Thomas Howell 1946-4-14 21638 Marin Chileno Valley Comment
  CAS-BOT-BC323979  Layia chrysanthemoides John Thomas Howell 1941-6-10 16307 Marin Summit between Lucas and Gallinas Valleys Comment
  JEPS62613  Layia chrysanthemoides John Thomas Howell 1970-5-10 46523 Marin w Rock Spring; Mt. Tamalpais Comment
  RSA126548  Layia chrysanthemoides J. T. Howell 1946-4-18 21678 Marin Novato. Comment
  CAS-BOT-BC321794  Layia gaillardioides John Thomas Howell 1943-5-22 18141 Marin Fairfax hills Comment
  CAS-BOT-BC321792  Layia gaillardioides John Thomas Howell 1933-4-30 11192 Marin N side of Mt. Tamalpais above Phoenix Lake Comment
  CAS-BOT-BC372295  Layia platyglossa John Thomas Howell 1930-4-20 4735 Marin Pt. Reyes Comment
  UC1177314  Layia platyglossa John Thomas Howell 1939-5-21 Marin S. Tiburon Comment
  CAS-BOT-BC534921  Lemna turionifera John Thomas Howell 1944-10-10 20714 Marin Marshes north of Olema Comment
  CAS-BOT-BC534877  Lemna valdiviana J. T. Howell 1943-6-13 s.n. Marin Sausalito Comment
  CAS-BOT-BC534878  Lemna valdiviana John Thomas Howell 1939-7-16 s.n. Marin Azalea Flat, Matt Davis Trail, Mt. Tamalpais Comment
  POM273087  Leontodon nudicaulis J. T. Howell 1945-7-29 21333 Marin Bolinas. Comment
  UCD133981  Leontodon saxatilis John Thomas Howell 1945-7-29 21333 Marin Bolinas. Comment
  UC1177288  Leontodon saxatilis subsp. saxatilis John Thomas Howell 1945-9-2 21457 Marin San Rafael Hills Comment
  CAS-BOT-BC339141  Leontodon saxatilis subsp. saxatilis John Thomas Howell 1945-7-29 21334 Marin Bolinas Comment
  CAS-BOT-BC339146  Leontodon saxatilis subsp. saxatilis John Thomas Howell 1945-7-29 21333 Marin Bolinas Comment
  CAS-BOT-BC215707  Lepechinia calycina John Thomas Howell 1925-4-5 936 Marin Pipeline Trail Comment
  CAS-BOT-BC215708  Lepechinia calycina John Thomas Howell 1930-12-28 5723 Marin Slope of Mt. Tamalpais above Mill Valley Comment
  CAS-BOT-BC215709  Lepechinia calycina John Thomas Howell 1946-5-12 21765 Marin Between Fairfax and Meadows Club Comment
  CAS-BOT-BC215710  Lepechinia calycina John Thomas Howell 1946-5-12 21810 Marin Carson Ridge Comment
  POM196465  Lepechinia calycina J. T. Howell 1925-4-5 936 Marin Pipeline Trail. Comment
  CAS-BOT-BC89085  Lepidium didymum John Thomas Howell 1939-11-5 s.n. Marin Sausalito. Comment
  CAS-BOT-BC89086  Lepidium didymum John Thomas Howell 1940-5-20 s.n. Marin Point Reyes Lighthouse. Comment
  CAS-BOT-BC89171  Lepidium draba John Thomas Howell 1945-9-16 21487 Marin Along road north of San Rafael. Comment
  CAS-BOT-BC89774  Lepidium latipes John Thomas Howell 1946-4-18 21654 Marin Ignacio. Comment
  CAS-BOT-BC12484  Lepidium nitidum John Thomas Howell 1939-5-28 7406 Marin Point Reyes Peninsula. Comment
  CAS-BOT-BC12742  Lepidium oxycarpum John Thomas Howell 1933-4-1 10919 Marin 4.5 miles north of San Rafael. Comment
  CAS-BOT-BC12743  Lepidium oxycarpum John Thomas Howell 1933-4-1 10919 Marin 4.5 miles north of San Rafael. Comment
  UC517473  Lepidium oxycarpum John Thomas Howell 1933-4-1 10919 Marin 4.5 mi n San Rafael Comment
  CAS-BOT-BC12794  Lepidium perfoliatum John Thomas Howell 1944-5-28 19512 Marin Between Manzanita and Almonte. Comment
  CAS-BOT-BC12853  Lepidium pinnatifidum John Thomas Howell 1976-6-2 51804 Marin Corte Madera. In park. Comment
  UCD115861  Lepidium pinnatifidum John Thomas Howell 1976-6-2 51804 Marin Corte Madera. Comment
  UCR88851  Lepidium sativum J. T. Howell 1987-1-21 s.n. Marin Terra Linda Vegetable Garden at Nova Albion and Cermenho Court, Tera Linda, San Rafael. Comment
  CAS-BOT-BC226530  Leptosiphon acicularis John Thomas Howell 1938-5-22 13789 Marin San Anselmo Canyon Comment
  POM230565  Leptosiphon androsaceus J. T. Howell 1937-6-13 13052 Marin Bolinas Comment
  CAS-BOT-BC324140  Lessingia hololeuca John Thomas Howell 1926-10-20 2223 Marin Corte Madera Comment
  CAS-BOT-BC324141  Lessingia hololeuca John Thomas Howell 1945-9-2 21452 Marin San Rafael Hills Comment
  CAS-BOT-BC324151  Lessingia hololeuca John Thomas Howell 1946-9-8 22992 Marin Near Ignacio Comment
  CAS-BOT-BC324153  Lessingia hololeuca John Thomas Howell 1926-10-20 2222 Marin On ridge between Alto and Chapman Comment
  CAS-BOT-BC324158  Lessingia hololeuca John Thomas Howell 1957-9-15 32957 Marin near Mill Valley Comment
  CAS-BOT-BC324159  Lessingia hololeuca John Thomas Howell 1945-9-16 21484 Marin North of San Rafael & E of Santa Venetia Comment
  POM197811  Lessingia hololeuca John T. Howell 1926-10-20 2222 Marin Ridge between Alto and Chapman Comment
  UC912284  Lessingia hololeuca John Thomas Howell 1926-9-9 2192 Marin Baltimore Park Comment
  CAS-BOT-BC324146  Lessingia hololeuca John Thomas Howell 1927-4-15 2318 Marin Baltimore Park 213 Comment
  CAS-BOT-BC324147  Lessingia hololeuca John Thomas Howell 1927-9-10 3095 Marin Baltimore Park 213 Comment
  CAS-BOT-BC324148  Lessingia hololeuca John Thomas Howell 1927-9-10 3095 Marin Baltimore Park 213 Comment
  CAS-BOT-BC324150  Lessingia hololeuca John Thomas Howell 1945-9-16 21484 Marin North of San Rafael, and east of Santa Venetia Comment
  CAS-BOT-BC324157  Lessingia hololeuca John Thomas Howell 1933-10-8 11698 Marin 1.5 miles east of Forest Knolls Comment
  RSA91166  Lessingia hololeuca John T. Howell 1926-9-9 2192 Marin Baltimore Park Comment
  CAS-BOT-BC324200  Lessingia micradenia var. micradenia John Thomas Howell 1927-5-8 2360 Marin Phoenix Lake Comment
  CAS-BOT-BC324201  Lessingia micradenia var. micradenia John Thomas Howell 1927-4-15 2320 Marin Phoenix Lake 213 Comment
  CAS-BOT-BC272254  Leymus X multiflorus John Thomas Howell 1946-6-30 22148 Marin Rodeo Lagoon Comment
  CAS-BOT-BC283521  Leymus X vancouverensis John Thomas Howell 1946-7-4 22177 Marin Dillons Beach Comment
  CAS-BOT-BC283526  Leymus X vancouverensis John Thomas Howell 1946-7-4 22177 Marin Dillons Beach Comment
  CAS-BOT-BC283520  Leymus X vancouverensis John Thomas Howell 1945-8-19 21445 Marin Head of Drakes Bay Comment
  CAS-BOT-BC283523  Leymus X vancouverensis John Thomas Howell 1945-6-30 21251 Marin Stinson Beach Comment
  CAS-BOT-BC283527  Leymus X vancouverensis John Thomas Howell 1945-6-3 20926 Marin Shell Beach Comment
  CAS-BOT-BC273574  Leymus californicus John Thomas Howell 1946-6-2 21982 Marin Rocky Ridge Fire Trail, Mt. Tamalpais Comment
  CAS-BOT-BC273582  Leymus californicus John Thomas Howell 1944-9-10 20736 Marin Shell Beach north of Inverness Comment
  CAS-BOT-BC272226  Leymus pacificus John Thomas Howell 1946-5-26 21950 Marin Near radio station, Pt. Reyes Peninsula Comment
  CAS-BOT-BC272228  Leymus pacificus John Thomas Howell 1947-6-4 23222 Marin Pt. Reyes Peninsula Comment
  CAS-BOT-BC272275  Leymus pacificus John Thomas Howell 1946-5-26 21950 Marin Near radio station, Pt. Reyes Peninsula Comment
  RSA126398  Leymus pacificus J. T. Howell 1947-6-4 23222 Marin Dunes beyond radio station, Pt. Reyes Peninsula. Comment
  CAS-BOT-BC272227  Leymus pacificus John Thomas Howell 1945-6-12 20960 Marin Pt. Reyes Peninsula Comment
  CAS-BOT-BC274484  Leymus triticoides John Thomas Howell 1946-6-9 22002 Marin Abbotts Lagoon Comment
  CAS-BOT-BC274485  Leymus triticoides John Thomas Howell 1944-9-24 20741 Marin Stinson Beach Comment
  UC1106087  Leymus triticoides John Thomas Howell 1946-6-9 22002 Marin Abbotts Lagoon Comment
  UC1106113  Leymus triticoides John Thomas Howell 1944-5-28 19528 Marin between Almonte and Mill Valley Comment
  CAS-BOT-BC436502  Ligusticum californicum John Thomas Howell 1946-6-30 22160 Marin Rodeo Lagoon Comment
  UC1106294  Lilaea scilloides John Thomas Howell 1944-5-28 19529 Marin between Almonte and Mill Valley Comment
  CAS-BOT-BC451612  Lilaea scilloides John Thomas Howell 1940-3-17 15391 Marin Lagunitas Meadows Comment
  SBBG40153  Lilaeopsis occidentalis J. T. Howell 1946-6-30 Marin Rodeo Lagoon Comment
  CAS-BOT-BC130738  Lilium pardalinum John Thomas Howell 1966-7-20 41994 Marin Area adjacent to the John Thomas Howell Botanical Garden, Tiburon Comment
  RSA216164  Lilium pardalinum J. T. Howell 1966-7-20 41994 Marin Area adjacent to the John Thomas Howell Botanical Garden, Tiburon. Comment
  UCD98508  Limonium californicum John Thomas Howell 1945-8-19 21431 Marin Drakes Bay. Comment
  UC618377  Linanthus acicularis John Thomas Howell 1938-5-22 13789 Marin San Anselmo Canyon Comment
  UC1177447  Linum bienne John Thomas Howell 1946-6-9 22015 Marin near Olema Comment
  CAS-BOT-BC36111  Lithocarpus densiflorus var. densiflorus John Thomas Howell 1927-8-22 3036 Marin near West Point, Mt. Tamalpais 518 Comment
  CAS-BOT-BC36114  Lithocarpus densiflorus var. densiflorus John Thomas Howell 1947-5-25 23206 Marin Berry Trail, Mt. Tamalpais Comment
  RSA145  Lithocarpus densiflorus var. densiflorus J. T. Howell 1927-8-22 674 Marin Mt. Tamalpais near West Point. 518 Comment
  CAS-BOT-BC430615  Lithophragma affine John Thomas Howell 1946-5-14 21831 Marin Laurel Dell, Mt. Tamalpais Comment
  CAS-BOT-BC435651  Lithophragma heterophyllum John Thomas Howell 1944-4-13 19372 Marin Big Rock Ridge west of Hamilton Field Comment
  CAS-BOT-BC435653  Lithophragma heterophyllum John Thomas Howell 1943-4-11 17907 Marin Black Canyon, San Rafael hills Comment
  UC1176738  Lithophragma heterophyllum John Thomas Howell 1943-4-11 17907 Marin Black Canyon San Rafael Hills; San Rafael hills, Black Canyon Comment
  RSA127213  Lithophragma heterophyllum John T. Howell 1946-5-12 21820 Marin Carson Country Comment
  CAS-BOT-BC342214  Logfia filaginoides John Thomas Howell 1969-5-5 45574 Marin Ring Hill, Tiburon Peninsula Comment
  CAS-BOT-BC342212  Logfia filaginoides John Thomas Howell 1940-5-12 s.n. Marin Chianti Country e. of Little Carson Comment
  CAS-BOT-BC283201  Lolium multiflorum John Thomas Howell 1945-5-9 s.n. Marin Ignacio Comment
  CAS-BOT-BC283447  Lolium multiflorum John Thomas Howell 1966-6-9 41553 Marin SE corner of John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC283448  Lolium multiflorum John Thomas Howell 1945-7-29 21354 Marin Bolinas Comment
  CAS-BOT-BC283450  Lolium multiflorum John Thomas Howell 1943-8-5 s.n. Marin Stinson Beach, in salt marsh Comment
  CAS-BOT-BC283451  Lolium multiflorum John Thomas Howell 1943-5-22 s.n. Marin Deer Park, near Fairfax Comment
  UC1106118  Lolium temulentum John Thomas Howell 1941-6-29 Marin Rattlesnake Camp Mt. Tamalpais; , Rattlesnake Camp Comment
  CAS-BOT-BC269152  Lolium temulentum John Thomas Howell 1941-5-25 16232 Marin Near Bootjack, Mt. Tamalpais Comment
  SEINET12118789  Lomatium dasycarpum J. T. Howell 1930-1 4718 Marin 1 i E of Lagunitas Comment
  CAS-BOT-BC240515  Lonicera hispidula John Thomas Howell 1939-5-21 s.n. Marin S. Tiburon Comment
  CAS-BOT-BC241410  Lonicera japonica John Thomas Howell 1947-5-21 23190 Marin Tiburon Comment
  UCD137362  Lonicera japonica John Thomas Howell 1947-5-21 23190 Marin Tiburon. Comment
  UC1177191  Lotus humistratus John Thomas Howell 1944-5-28 19513 Marin between Manzanita and Almonte Comment
  SEINET11071685 Image available Lotus pedunculatus John Thomas Howell 1944-9-30 19856 Marin between Mill Valley and head of salt marshes, el. ca. 10 feet, Marin Co. Comment
  UC1177188  Lotus scoparius John Thomas Howell 1940-9-15 Marin Stinson Beach Comment
  UC1177186  Lotus strigosus John Thomas Howell 1944-5-27 19505 Marin above Cascade Canyon (s side of Mt. Tamalpais); Mt. Tamalpais Comment
  CDA4199  Lotus uliginosus J. T. Howell 1944-7-3 19856 Marin Between Mill Valley and head of salt marshes. 0 Comment
  JEPS30768  Lotus uliginosus John Thomas Howell 1944-7-30 19856 Marin between head of salt marshes and Mill Valley 3 Comment
  UC710609  Lotus uliginosus John Thomas Howell 1944-7-30 19856 Marin between head of salt marshes and Mill Valley 3 Comment
  UCD106704  Lotus uliginosus John Thomas Howell 1944-7-30 19856 Marin Between Mill Valley and head of salt marshes. 3 Comment
  UCD106705  Lotus uliginosus John Thomas Howell 1944-7-30 19856 Marin Between Mill Valley and head of salt marshes. 3 Comment
  RSA32136  Ludwigia hexapetala J. T. Howell 1945-7-1 21259 Marin Tiburon. Comment
  CAS-BOT-BC60262  Lunaria annua John Thomas Howell 1939-4-23 14601 Marin Mill Valley. Blythedale Canyon. Comment
  UC1177180  Lupinus albifrons John Thomas Howell 1939-11-5 Marin Manzanita Comment
  UC1177176  Lupinus albifrons var. albifrons John Thomas Howell 1940-5-26 15544 Marin Little Carson Comment
  CAS-BOT-BC196052  Lupinus albifrons var. collinus John Thomas Howell 1942-4-19 16944 Marin Big Carson Canyon Comment
  RSA128315  Lupinus albifrons var. collinus J. T. Howell 1947-5-25 23196 Marin Simmons Trail, Mt. Tamalppais. Comment
  UC1177178  Lupinus albifrons var. douglasii John Thomas Howell 1950-6-4 26622 Marin Mt. Tamalpais; Mt. Tamalpais, Blithedale Canyon Comment
  CAS-BOT-BC196412  Lupinus arboreus John Thomas Howell 1940-5-20 15499 Marin Pt. Reyes Comment
  UC1177440  Lupinus bicolor John Thomas Howell 1943-5-9 17971 Marin San Rafael Hills Comment
  UC1177459  Lupinus bicolor John Thomas Howell 1944-5-28 19530 Marin between Almonte and Mill Valley; between Almonte and Mill Valley Comment
  UC1177479  Lupinus bicolor John Thomas Howell 1946-4-13 21596 Marin Mt. Tamalpais , Summit Meadow to Rock Spring (Summit Meadow to Rock Spring) Comment
  CAS-BOT-BC215001  Lupinus chamissonis John Thomas Howell; et al 1980-6-19 53724 Marin Near Abbotts Lagoon, Point Reyes Peninsula Comment
  CAS-BOT-BC215069  Lupinus chamissonis John Thomas Howell 1939-6-18 14779 Marin Near Mud Lake Comment
  CAS-BOT-BC215070  Lupinus chamissonis John Thomas Howell 1939-6-4 14729 Marin Point Reyes Peninsula Comment
  CAS-BOT-BC215071  Lupinus chamissonis John Thomas Howell 1939-6-4 14729 Marin Point Reyes Peninsula Comment
  UC1177173  Lupinus formosus John Thomas Howell 1945-5-9 20854 Marin between Ignacio and Novato; between Ignacio and Novato Comment
  UC1177213  Lupinus formosus John Thomas Howell 1946-6-13 22064 Marin Estero Americano Comment
  UC1177216  Lupinus formosus John Thomas Howell 1943-6-6 18211 Marin canyon just below Muir Woods; canyon just below Muir Woods Comment
  UC1177217  Lupinus formosus John Thomas Howell 1946-5-25 21934 Marin Greenbrae Hills Comment
  UC1177218  Lupinus formosus John Thomas Howell 1946-5-14 21848 Marin Tamalpais Valley Comment
  UC1177228  Lupinus formosus John Thomas Howell 1939-5-21 14703 Marin e side Tiburon Peninsula; e side of Tiburon Peninsula Comment
  RSA128309  Lupinus formosus var. formosus J. T. Howell 1940-5-20 15468 Marin Fairfax Comment
  CAS-BOT-BC8365  Lupinus marinensis John Thomas Howell 1938-5-22 13787 Marin San Anselmo Canyon Comment
  SEINET10871077  Lupinus marinensis John Thomas Howell 1938-5-22 Howell 13787 Marin In san anselmo canyon. Comment
  UC1177475  Lupinus microcarpus var. densiflorus John Thomas Howell 1946-5-12 21761 Marin between Fairfax and Country Club Comment
  RSA87403  Lupinus tidestromii J. T. Howell 1939-6-4 s.n. Marin Point Reyes Peninsula Comment
  UC865252  Lupinus tidestromii var. layneae John Thomas Howell 1939-6-4 14729 Marin Point Reyes Peninsula Comment
  POM180983  Lupinus variicolor J. T. Howell 1930-4-20 4740 Marin Pt. Reyes. Comment
  POM196443  Luzula comosa J. T. Howell 1927-3-13 2285 Marin Point San Quentin. Comment
  CAS-BOT-BC441317  Luzula subsessilis John Thomas Howell 1969-4-27 45557 Marin Near west end of Lucas Valley Comment
  UC1177448  Lythrum hyssopifolia John Thomas Howell 1945-7-29 21340 Marin Bolinas Comment
  CAS-BOT-BC342626  Madia anomala John Thomas Howell 1946-5-25 21932 Marin Greenbrae Hills Comment
  CAS-BOT-BC342627  Madia anomala John Thomas Howell 1946-5-25 21932 Marin Greenbrae Hills Comment
  CAS-BOT-BC342629  Madia anomala John Thomas Howell 1947-4-27 23097 Marin Bald Mt. west of San Anselmo Comment
  CAS-BOT-BC342630  Madia anomala John Thomas Howell 1946-5-12 21763 Marin Between Fairfax and Country Club Comment
  CAS-BOT-BC342631  Madia anomala John Thomas Howell 1943-5-22 18136 Marin Fairfax hills Comment
  CAS-BOT-BC342633  Madia anomala John Thomas Howell 1941-6-10 16284 Marin Black Point Comment
  UC1176882  Madia anomala John Thomas Howell 1941-6-10 16284 Marin Black Point Comment
  CAS-BOT-BC342628  Madia anomala John Thomas Howell 1955-5-29 30256 Marin Near Rock Spring on Laurel Dell Trail, Mt. Tamalpais Comment
  CAS-BOT-BC343716  Madia elegans John Thomas Howell 1944-5-14 19472 Marin Between Salmon Creek and Chileno Valley Comment
  CAS-BOT-BC343717  Madia elegans John Thomas Howell 1944-7-23 19844 Marin San Rafael Comment
  POM196452  Madia exigua J. T. Howell 1927-5-8 2378 Marin East slope of Mt. Tamalpais Comment
  CAS-BOT-BC343083  Madia gracilis John Thomas Howell 1939-7-2 14840 Marin Between Big Lagoon and Muir Woods Comment
  CAS-BOT-BC343086  Madia gracilis John Thomas Howell 1941-6-10 16289 Marin Black Point Comment
  CAS-BOT-BC343087  Madia gracilis John Thomas Howell 1946-5-25 21931 Marin Greenbrae Hills Comment
  CAS-BOT-BC343088  Madia gracilis John Thomas Howell 1939-6-25 14809 Marin Mt. Tamalpais above Cascade Canyon Comment
  CAS-BOT-BC343089  Madia gracilis John Thomas Howell 1945-6-3 20935 Marin Shell Beach Comment
  CAS-BOT-BC343090  Madia gracilis John Thomas Howell 1939-6-18 14777 Marin Near Mud Lake Comment
  POM181001  Madia gracilis J. T. Howell 1930-7-20 5371 Marin Near Phoenix Lake Comment
  CAS-BOT-BC343606  Madia sativa John Thomas Howell 1946-5-25 21930 Marin Greenbrae Hills Comment
  UC1177322  Madia sativa John Thomas Howell 1945-7-15 21293 Marin at Fairfax city limits (Ridgecrest Blvd) Comment
  CAS-BOT-BC343603  Madia sativa John Thomas Howell 1939-9-3 s.n. Marin Corte Madera, Mt. Tamalpais Comment
  CAS-BOT-BC343619  Madia sativa John Thomas Howell 1939-6-25 s.n. Marin Mill Valley to Eastwood Comment
  POM193961  Maianthemum racemosum subsp. amplexicaule J. T. Howell 1927-9-9 3090 Marin Mill Valley Comment
  CAS-BOT-BC540140  Malus pumila John Thomas Howell 1950-11-4 35106 Marin Single roadside seedling, Frank Valley Comment
  UC1176770  Meconella californica John Thomas Howell 1946-4-14 21623 Marin Near Tomales Comment
  UC1177226  Medicago arabica John Thomas Howell 1946-6-20 Marin Stinson Beach Comment
  UC1106253  Medicago polymorpha John Thomas Howell 1947-7-6 Marin Laurel Dell Mt. Tamalpais Comment
  UC1177227  Medicago sativa John Thomas Howell 1939-9-3 Marin Corte Madera Comment
  CAS-BOT-BC271763  Melica californica John Thomas Howell 1944-4-13 19379 Marin Big Rock Ridge west of Hamilton Field Comment
  CAS-BOT-BC271766  Melica californica John Thomas Howell 1943-5-9 s.n. Marin Black Canyn, San Rafael Hills Comment
  RSA127268  Melica californica J. T. Howell 1939-5-21 s.n. Marin S. Tiburon. Comment
  UC1106137  Melica californica John Thomas Howell 1941-5-25 16214 Marin Mt. Tamalpais; Rifle Camp Comment
  CAS-BOT-BC282144  Melica geyeri John Thomas Howell 1944-5-14 19460 Marin Salmon Creek Campground Comment
  CAS-BOT-BC282145  Melica geyeri John Thomas Howell 1947-5-18 23185 Marin Lagunitas Meadows Comment
  UC1106141  Melica geyeri John Thomas Howell 1941-5-25 16227 Marin Potrero Meadow; Mt. Tamalpais Comment
  CAS-BOT-BC7405  Melica geyeri var. aristulata John Thomas Howell 1943-4-11 17906 Marin San Rafael Hills, Black Canyon Comment
  SEINET196565 Image available Melica geyeri var. aristulata John Thomas Howell 1947-5-18 23185 Marin unspecified Comment
  CAS-BOT-BC281332  Melica harfordii John Thomas Howell 1938-6-19 13928 Marin Near Rattlesnake, Mt Tamalpais Comment
  CAS-BOT-BC281334  Melica harfordii John Thomas Howell 1941-5-25 16204 Marin Arturo Trail, Mt Tamalpais Comment
  CAS-BOT-BC281335  Melica harfordii John Thomas Howell 1939-5-14 14666 Marin Between Phoenix Lake and Lake Lagunitas Comment
  RSA127267  Melica harfordii J. T. Howell 1943-5-30 18185 Marin Wheeler Trail, Mt. Tamalpais. Comment
  UC1106138  Melica harfordii John Thomas Howell 1941-5-25 16204 Marin Mt. Tamalpais; Arturo Trail Comment
  UC1106142  Melica subulata John Thomas Howell 1945-6-3 20916 Marin near Inverness Comment
  CAS-BOT-BC262517  Melica torreyana John Thomas Howell 1933-4-30 11186 Marin North side of Mt. Tamalpais Comment
  CAS-BOT-BC262519  Melica torreyana John Thomas Howell 1939-5-21 14694 Marin South end of Tiburon Peninsula Comment
  CAS-BOT-BC262541  Melica torreyana John Thomas Howell 1939-5-14 14678 Marin Near Collier Spring, Mt. Tamalpais Comment
  RSA127266  Melica torreyana J. T. Howell 1942-6-21 s.n. Marin Carson Ridge Comment
  SEINET199916 Image available Melica torreyana J. T. Howell 1939-5-14 14678 Marin Serpentine area near Collier Spring Mt Tamalpais Comment
  UC1106116  Melica torreyana John Thomas Howell 1943-5-9 17982 Marin San Rafael Hills Comment
  SEINET10599674  Melica torreyana John Thomas Howell 1939-5-14 Howell 14678 Marin Serpentine area near Collier Spring, Mt. Tamalpais. Comment
  UCD125110  Mentha X rotundifolia John Thomas Howell 1944-7-30 19853 Marin Mill Valley. 3 Comment
  CAS-BOT-BC322603  Micropus amphibolus John Thomas Howell 1944-4-13 19387 Marin Big Rock Ridge west of Hamilton Field Comment
  CAS-BOT-BC322606  Micropus amphibolus John Thomas Howell 1943-5-22 18148 Marin Fairfax Hills Comment
  CAS-BOT-BC322607  Micropus amphibolus John Thomas Howell 1944-4-23 19408 Marin Hills se of Kentfield = Greenbrae Hills Comment
  CAS-BOT-BC322608  Micropus amphibolus John Thomas Howell 1943-4-11 17921 Marin Black Canyon, San Rafael Hills Comment
  RSA128947  Micropus amphibolus J. T. Howell 1943-4-11 17921 Marin Black Canyon, San Rafeal Hills Comment
  SEINET199929  Micropus amphibolus J. T. Howell 1943-5-2 17938 Marin Canyon of San Anselmo Creek Comment
  CAS-BOT-BC348501  Micropus californicus var. californicus John Thomas Howell 1947-5-4 23134 Marin San Rafael Hills Comment
  UC1106273  Micropus californicus var. californicus John Thomas Howell 1947-5-4 23134 Marin San Rafael Hills Comment
  CAS-BOT-BC348500  Micropus californicus var. californicus John Thomas Howell 1966-4-18 41484 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC348742  Microseris bigelovii John Thomas Howell 1946-5-19 21910 Marin Meadows Club, Fairfax Hills Comment
  CAS-BOT-BC348745  Microseris bigelovii John Thomas Howell 1946-5-16 21859 Marin Angel Island, se. side Comment
  CAS-BOT-BC348752  Microseris bigelovii J. T. Howell 1943-5-22 18150 Marin Fairfax Hills Comment
  CAS-BOT-BC348932  Microseris bigelovii John Thomas Howell 1947-5-4 23128 Marin San Rafael Hills Comment
  CAS-BOT-BC348925  Microseris douglasii subsp. douglasii John Thomas Howell 1946-5-12 21785 Marin Carson Ridge Comment
  CAS-BOT-BC348934  Microseris douglasii subsp. douglasii John Thomas Howell 1945-5-9 20823 Marin Between Hamilton Field and Ignacio Comment
  CAS-BOT-BC348935  Microseris douglasii subsp. douglasii John Thomas Howell 1946-5-14 21837 Marin Between Barths Retreat and Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC348940  Microseris douglasii subsp. douglasii John Thomas Howell 1942-6-21 16979 Marin Carson Ridge Comment
  UC1176921  Microseris douglasii subsp. douglasii John Thomas Howell 1946-5-12 21785 Marin Carson Ridge Comment
  CAS-BOT-BC348924  Microseris douglasii subsp. douglasii John Thomas Howell 1939-5-14 14671 Marin Lake Lagunitas Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC348941  Microseris douglasii subsp. douglasii John Thomas Howell 1966-4-6 41463 Marin John Thomas Howell Botanical Garden, Tiburon. Along path west of church Comment
  RSA126546  Microseris douglasii subsp. douglasii J. T. Howell 1941-5-25 16221 Marin Potrero Meadow, Mt. Tamalpais Comment
  RSA126547  Microseris heterocarpa J. T. Howell 1944-5-27 19502 Marin Summit Ave. ridge, Mt. Tamalpais Comment
  CAS-BOT-BC322732  Microseris paludosa John Thomas Howell 1947-4-30 23112 Marin Dillons Beach Comment
  CAS-BOT-BC322740  Microseris paludosa John Thomas Howell 1939-6-4 14726 Marin Pt. Reyes Peninsula Comment
  CAS-BOT-BC322741  Microseris paludosa John Thomas Howell 1946-6-13 22054 Marin East of Dillons Beach Comment
  CAS-BOT-BC322734  Microseris paludosa John Thomas Howell 1927-4-23 2337 Marin Hilltop southwest of Mill Valley 152 Comment
  CAS-BOT-BC322735  Microseris paludosa John Thomas Howell 1925-4-5 910 Marin Mill Valley at the beginning of Pipeline Trail 152 Comment
  JEPS58930  Mimulus arvensis John Thomas Howell 1940-5-20 15479 Marin near Tocaloma Comment
  JEPS58928  Mimulus microphyllus John Thomas Howell 1940-5-12 15435 Marin s end Carson Ridge Comment
  CAS-BOT-BC174589  Minuartia californica John Thomas Howell 1946-4-14 21602 Marin Near Dillons Beach Comment
  CAS-BOT-BC384004  Mirabilis jalapa John Thomas Howell 1959-11-4 35102 Marin Sausalito Comment
  CAS-BOT-BC384005  Mirabilis jalapa John Thomas Howell 1969-6-30 45865 Marin Bordering estuary of San Rafael Creek at Irwin St. bridge, San Rafael Comment
  CDA3327  Mirabilis jalapa J. T. Howell 1969-6-3 45865 Marin Irwin Street bridge, San Rafael . 0 Comment
  UC1106145  Mollugo verticillata John Thomas Howell 1946-11-24 Marin Alpine Lake, Mount Tamalpais Comment
  CAS-BOT-BC220395  Monardella purpurea John Thomas Howell 1939-7-16 s.n. Marin Fern Canyon, Mt. Tamalpais Comment
  CAS-BOT-BC220412  Monardella purpurea John Thomas Howell 1939-6-25 14791 Marin Summit Avenue, Mill Valley Comment
  CAS-BOT-BC220420  Monardella purpurea John Thomas Howell 1939-6-25 14791 Marin Summit Ave., Mill Valley Comment
  CAS-BOT-BC220402  Monardella purpurea John Thomas Howell 1946-8-11 22847 Marin Between Mt. Theater & Barths Retreat, Mt. Tamalpais Comment
  CAS-BOT-BC220415  Monardella purpurea John Thomas Howell 1943-6-13 s.n. Marin Sausalito Comment
  SEINET5333414  Monardella purpurea J. T. Howell 1972-6-18 s.n. Marin near Ring Hill, Tiburon Peninsula 168 Comment
  CAS-BOT-BC214167  Monardella villosa John Thomas Howell 1930-7-20 5374 Marin Near Phoenix Lake Comment
  CAS-BOT-BC220534  Monardella villosa John Thomas Howell 1946-5-19 21903 Marin Fairfax Comment
  CAS-BOT-BC220540  Monardella villosa John Thomas Howell 1947-6-18 23281 Marin North of Dillons Beach Comment
  CAS-BOT-BC220541  Monardella villosa John Thomas Howell 1946-5-16 21874 Marin Angel Island, s. side Comment
  SEINET13948730 Image available Monardella villosa John Thomas Howell 1943-1 s.n. Marin Sausalito Comment
  RSA0022773  Monardella villosa subsp. subserrata J. T. Howell 1930-7-20 5374 Marin Near Phoenix Lake. Comment
  CAS-BOT-BC444903  Montia fontana John Thomas Howell 1940-3-17 s.n. Marin Lagunitas Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC444988  Montia fontana John Thomas Howell 1949-4-6 25295 Marin Hamilton Field Comment
  CAS-BOT-BC101677  Myrica californica John Thomas Howell 1927-4-23 2351 Marin About 1 mile east of Big Lagoon 30 Comment
  RSA128312  Myriophyllum aquaticum J. T. Howell 1946-6-16 s.n. Marin Point Reyes Station. Comment
  UC1106305  Myriophyllum hippuroides John Thomas Howell 1946-6-20 22111 Marin Pond 2 mi S of Olema. Comment
  UC1100001  Najas guadalupensis John Thomas Howell 1946-9-29 23030 Marin Stinson Beach Comment
  CAS-BOT-BC456179  Najas guadalupensis John Thomas Howell 1946-9-29 23030 Marin Stinson Beach Comment
  UC1106126  Nassella cernua John Thomas Howell 1946-5-19 21916 Marin Carson Ridge Comment
  CAS-BOT-BC259926  Nassella lepida John Thomas Howell 1940-5-12 15427 Marin Between Little Carson and Carson Ridge Comment
  CAS-BOT-BC259927  Nassella lepida John Thomas Howell 1943-5-9 17956 A Marin Black Canyon, San Rafael hills Comment
  CAS-BOT-BC259928  Nassella lepida John Thomas Howell 1945-5-6 20809 Marin San Rafael Hills Comment
  CAS-BOT-BC259929  Nassella lepida John Thomas Howell 1943-5-30 18195 Marin Azalea Flat, Mount Tamalpais Comment
  CAS-BOT-BC259930  Nassella lepida John Thomas Howell 1941-5-25 16237 Marin Near Bootjack, Mount Tamalpais Comment
  CAS-BOT-BC259931  Nassella lepida John Thomas Howell 1943-5-22 18135 Marin Fairfax hills Comment
  CAS-BOT-BC259933  Nassella lepida John Thomas Howell 1945-5-27 20881 Marin E of Mountain Theater, Mount Tamalpais Comment
  CAS-BOT-BC259936  Nassella lepida John Thomas Howell 1966-5-25 41538 Marin Just N of garden area, John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC259937  Nassella lepida John Thomas Howell 1946-5-19 21916 Marin Carson Ridge Comment
  CAS-BOT-BC259938  Nassella lepida John Thomas Howell 1944-4-23 19406 Marin SE of Kentfield Comment
  CAS-BOT-BC259939  Nassella lepida John Thomas Howell 1944-7-7 19684 Marin Between Lagunitas Meadow and Fairfax Comment
  CAS-BOT-BC259942  Nassella lepida John Thomas Howell 1946-5-16 21896 Marin N side of Angel Island Comment
  RSA127382  Nassella lepida J. T. Howell 1943-5-9 17956 -A Marin Black Canyon, San Rafael Hills Comment
  CAS-BOT-BC260146  Nassella pulchra John Thomas Howell 1946-5-16 21849 Marin Angel Island, SE side Comment
  CAS-BOT-BC260147  Nassella pulchra John Thomas Howell 1946-5-16 21853 Marin Angel Island, SE side Comment
  CAS-BOT-BC260148  Nassella pulchra John Thomas Howell 1941-6-8 16251 Marin Hills NE of San Rafael [San Rafael Hills] Comment
  CAS-BOT-BC260149  Nassella pulchra John Thomas Howell 1941-5-25 16211 Marin Rifle Camp, Mount Tamalpais Comment
  CAS-BOT-BC260150  Nassella pulchra John Thomas Howell 1966-4-18 41487 Marin Just S of church, John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC260151  Nassella pulchra John Thomas Howell 1966-4-18 41487 Marin Just S of church, John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC260166  Nassella pulchra John Thomas Howell 1938-5-22 13794 Marin San Anselmo Canyon Comment
  SEINET199914  Nassella pulchra John Thomas Howell 1941-6-8 16251 Marin San Rafael Hills Comment
  UC1106100  Nassella pulchra John Thomas Howell 1946-5-16 21849 Marin se side Angel Island Comment
  UC1008734  Navarretia heterodoxa John Thomas Howell 1942-6-21 16975 Marin above Fairfax; San Anselmo Cnayon Comment
  UC1008735  Navarretia heterodoxa John Thomas Howell 1942-9-13 17866 Marin above San Anselmo Canyon (trail to Carson Ridge) Comment
  UC1023052  Navarretia intertexta John Thomas Howell 1941-7-6 16351 Marin Kent Trail Mt. Tamalpais Comment
  UC1008729  Navarretia intertexta subsp. intertexta John Thomas Howell 1942-7-12 17030 Marin Potrero Meadows Mt. Tamalpais Comment
  LA206697  Navarretia mellita John Thomas Howell; 1930-7-20 5378 Marin near Phoenix Lake Comment
  CAS-BOT-BC232716  Navarretia rosulata John Thomas Howell 1945-7-15 21308 Marin Near Liberty's Comment
  CAS-BOT-BC232718  Navarretia rosulata John Thomas Howell 1952-9-7 28854 Marin Barths Retreat, Mount Tamalpais Comment
  CAS-BOT-BC232724  Navarretia rosulata John Thomas Howell 1945-7-15 21308 Marin Near Liberty Camp Comment
  UCD48556  Navarretia rosulata John Thomas Howell 1946-6-23 22114 Marin Carson Ridge, Marin County. Comment
  UCD48557  Navarretia rosulata John Thomas Howell 1952-9-7 28854 Marin Barths Retreat, Mt. Tamalpais, Marin County. Comment
  POM180640  Navarretia squarrosa J. T. Howell 1930-7-20 5379 Marin Hills just north of Pheonix Lake. Comment
  UCD48713  Navarretia viscidula John Thomas Howell 1945-7-15 21303 Marin Near Meadow Club SW of Fairfax. Comment
  RSA31411  Oenothera elata subsp. hookeri J. T. Howell 1945-6-30 21254 Marin Stinson Beach. Comment
  CAS-BOT-BC502765  Orobanche bulbosa John Thomas Howell 1945-5-27 20887 Marin Mt. Tamalpais: Rock Spring Trail Comment
  CAS-BOT-BC499675  Orobanche californica subsp. californica John Thomas Howell 1939-7-2 s.n. Marin Big Lagoon (Muir Beach) Comment
  CAS-BOT-BC499916  Orobanche fasciculata John Thomas Howell 1939-5-21 s.n. Marin Tiburon Peninsula (south end) Comment
  CAS-BOT-BC499918  Orobanche fasciculata John Thomas Howell 1927-5-8 2377 Marin East slope of Mt. Tamalpais Comment
  CAS-BOT-BC500277  Orobanche uniflora subsp. occidentalis John Thomas Howell 1943-4-11 17909 Marin San Rafael HIlls: Bkack Canyon Comment
  CAS-BOT-BC238419  Orthocarpus John Thomas Howell 1957-6-27 s.n. Marin Hearts Desire Beach, Tomales Bay State Park Comment
  RSA220018  Orthocarpus faucibarbatus J. T. Howell 1969-5-5 45572 Marin Ring Hill, Tiburon Peninsula. Comment
  UC1177443  Oxalis albicans subsp. pilosa John Thomas Howell 1939-4-23 14607 Marin Blythe Canyon Mill Valley Comment
  SEINET3347214 Image available Oxalis ebracteata John Thomas Howell 1946-6-20 Marin Stinson Beach Comment
  RSA70481  Oxalis laxa J. T. Howell 1946-6-20 22099 Marin Stinson Beach. Comment
  UCD110795  Oxalis micrantha John Thomas Howell 1946-6-20 22099 Marin Stinson Beach. Comment
  CAS-BOT-BC253836  Panicum dichotomiflorum J. T. Howell 1988-8-10 s.n. Marin SW side of football field, Terra Linda High School Comment
  SEINET10563839  Panicum huachucae var. fasciculatum John Thomas Howell 1943-7-3 Howell 18247 Marin Near Bootjack, Mount Tamalpais. Comment
  POM273078  Papaver argemone J. T. Howell 1946-5-30 21962 Marin Little Carson Canyon. Comment
Read comments
Mar 26 2009
  CAS-BOT-BC422806  Papaver californicum John Thomas Howell 1946-5-30 21962 Marin Little Carson Canyon Comment
  CAS-BOT-BC422807  Papaver californicum John Thomas Howell 1946-5-30 21962 Marin Little Carson Canyon Comment
  CAS-BOT-BC253943  Parapholis incurva John Thomas Howell 1945-5-9 20852 Marin Ignacio Comment
  CAS-BOT-BC253946  Parapholis incurva John Thomas Howell 1945-5-6 20816 Marin Just above high tide, San Rafael Comment
  CDA2136  Parapholis incurva J. T. Howell 1945-5-6 20816 Marin San Rafael. 0 Comment
  RSA91914  Parapholis incurva J. T. Howell 1945-5-6 20816 Marin San Rafael. Comment
  SEINET10959970  Parapholis incurva John Thomas Howell 1945-5-6 Howell 20816 Marin Edge of salt marsh just above high tide, San Rafael. Comment
  RSA121061  Parnassia palustris var. californica J. T. Howell 1957-1-1 32019 Marin Azalea Flat, Mt. Tamalpais. Comment
  UC1177493  Paspalum dilatatum John Thomas Howell 1945-8-5 21364 Marin Stinson Beach near Stinson Beach, McKinnan's Landing (McKinnan's Landing) Comment
  CAS-BOT-BC265642  Paspalum distichum John Thomas Howell 1940-9-15 s.n. Marin Stinson Beach Comment
  CAS-BOT-BC202872  Paxistima myrsinites John Thomas Howell 1941-3-16 16155 Marin About midway between Laurel Dell and Barth's Retreat, Mt. Tamalpais Comment
  CDA4424  Pelargonium grossularioides J. T. Howell 1944-7-23 19842 Marin San Francisco Bay region; San Rafael. Comment
  UCD103483  Pelargonium grossularioides John Thomas Howell 1944-7-23 19842 Marin San Rafael. 60 Comment
  CAS-BOT-BC69179  Pellaea andromedifolia J. T. Howell 1966-4-18 41516 Marin just north of John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC258787  Pennisetum clandestinum John Thomas Howell 1965-10-13 41415 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC327983  Pentachaeta alsinoides John Thomas Howell 1947-4-27 23099 Marin Bald Mt. west of San Anselmo Comment
  UC1106263  Pentachaeta alsinoides John Thomas Howell 1946-5-16 21865 Marin se side Angel Island Comment
  CAS-BOT-BC327981  Pentachaeta alsinoides John Thomas Howell 1946-5-16 21865 Marin Laurel Dells, Mt. Tamalpais Comment
  POM273123  Pentachaeta bellidiflora J. T. Howell 1946-5-25 21933 Marin Greenbrae HillsGreenhorn Mountain Range: North Rim of Kern Canyon. Comment
  CAS-BOT-BC222725  Perideridia gairdneri subsp. gairdneri John Thomas Howell 1939-10-1 15367 Marin Near Lake Lagunitas Comment
  CAS-BOT-BC413524  Persicaria amphibia John Thomas Howell 1947-6-18 23271 Marin Laguna, Chileno Valley Comment
  CAS-BOT-BC418877  Persicaria hydropiperoides John Thomas Howell 1946-6-20 22107 Marin 4 miles n. of Bolinas Comment
  CAS-BOT-BC418879  Persicaria hydropiperoides John Thomas Howell 1946-9-20 s.n. Marin Laguna in Chileno Valley Comment
  CAS-BOT-BC419022  Persicaria lapathifolia John Thomas Howell 1941-6-10 16278 Marin Near Black Point Comment
  CAS-BOT-BC419016  Persicaria lapathifolia J. T. Howell 1987-7-30 s.n. Marin Community Vegetable Garden, Nova Albion St. across from Cermenho Ct., San Rafael Comment
  CAS-BOT-BC419211  Persicaria maculosa John Thomas Howell 1941-6-10 16279 Marin Near Black Point Comment
  CAS-BOT-BC419343  Persicaria punctata John Thomas Howell 1924-8-31 643 Marin Near Ross Comment
  RSA26544  Phacelia californica J. T. Howell 1930-7-20 5384 Marin Rocky slope of Mt. Tamalpais on south-east side. Comment
  CDA40347  Phacelia californica J. T. Howell 1938-6-5 13894 Marin Mt. Tamalpais, between Fern Canyon and Azalea Flat. 0 Comment
  UC702963  Phacelia distans John Thomas Howell 1930-4-20 4741 Marin Pt. Reyes Comment
  POM299313  Phacelia divaricata var. continentis J. T. Howell 1930-3-9 4552 Marin Point Reyes near the lighthouse. Comment
  SD71221  Phacelia imbricata John Thomas Howell 1947-6-18 23252 Marin Salmon Creek, Chileno Valley summit. Comment
  SBBG29828  Phacelia insularis var. continentis J. T. Howell 1930-3-9 4552 Marin Point Reyes near the lighthouse Comment
  RSA220033  Phacelia malvifolia J. T. Howell 1969-5-5 45578 Marin Ring Hill, Tiburon Peninsula. Comment
  CAS-BOT-BC154378  Phacelia suaveolens John Thomas Howell 1946-5-14 21842 Marin Potrero Meadow. Mt. Tamalpais Comment
  CAS-BOT-BC154379  Phacelia suaveolens John Thomas Howell 1946-5-19 21919 Marin Capon Ridge Comment
  SD71222  Phacelia suaveolens John Thomas Howell 1946-5-14 21842 Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC265772  Phalaris aquatica John Thomas Howell 1945-8-12 21381 Marin Above salt marsh, Tiburon Comment
  CDA2280  Phalaris aquatica J. T. Howell 1945-8-12 21381 Marin Tiburon. 0 Comment
  SBBG30015  Phalaris aquatica J. T. Howell 1945-8-12 21381 Marin Tiburon Comment
  SEINET195299 Image available Phalaris aquatica John Thomas Howell 1945-8-12 21381 Marin Tiburon Comment
  UC1177484  Phalaris aquatica John Thomas Howell 1941-6-10 16295 Marin Novato Comment
  CAS-BOT-BC265774  Phalaris aquatica John Thomas Howell 1939-7-18 s.n. Marin East side Bolinas Bay Comment
  CAS-BOT-BC265775  Phalaris aquatica John Thomas Howell 1945-8-12 21381 Marin Above salt marsh, Tiburon Comment
  RSA91904  Phalaris aquatica J. T. Howell 1945-8-12 21381 Marin Tiburon. Comment
  CAS-BOT-BC258972  Phalaris californica John Thomas Howell 1946-5-12 21827 Marin Carson country Comment
  CAS-BOT-BC258974  Phalaris californica John Thomas Howell 1945-6-3 20941 Marin Near and between Twin Beaches (=Shell Beach) and Inverness Comment
  CAS-BOT-BC259066  Phalaris lemmonii John Thomas Howell 1945-5-9 20833 Marin Between Hamilton Field and Ignacio Comment
  CAS-BOT-BC259067  Phalaris lemmonii John Thomas Howell 1941-6-10 16275 Marin Near Black Point Comment
  CAS-BOT-BC259069  Phalaris lemmonii John Thomas Howell 1947-5-4 23136 Marin San Rafael Comment
  CAS-BOT-BC259071  Phalaris lemmonii John Thomas Howell 1945-5-6 20810 Marin San Rafael Hills Comment
  UC1106315  Phalaris lemmonii John Thomas Howell 1944-5-7 19426 Marin Greenbrae Comment
  CAS-BOT-BC250602  Phalaris minor John Thomas Howell 1944-5-7 19425 Marin Greenbrae Comment
  RSA127228  Phalaris minor J. T. Howell 1944-5-7 19425 Marin Greenbrae, Marin County Comment
  CAS-BOT-BC250723  Phalaris paradoxa John Thomas Howell 1943-5-30 18179 Marin Summit Ave., Mill Valley Comment
  CAS-BOT-BC141322  Phoradendron serotinum subsp. tomentosum John Thomas Howell 1942-2-22 16932 Marin Along old stage road, West Point to Cypress, S side Mt.Tamalpais Comment
  CAS-BOT-BC207287  Pickeringia montana var. montana John Thomas Howell 1924-9-14 656 Marin S slope of Mt. Tamalpais Comment
  UC1177384  Piperia elegans John Thomas Howell 1946-8-23 22887 Marin Pierce Pt. road Point Reyes Peninsula Comment
  CAS-BOT-BC254416  Piptatherum miliaceum John Thomas Howell 1976-6-2 51806 Marin In park, Corte Madera Comment
  CAS-BOT-BC254417  Piptatherum miliaceum John Thomas Howell 1981-7-24 54413 Marin Near St. John's Church, Ross Comment
  UCD120794  Plagiobothrys collinus var. californicus John Thomas Howell 1944-6-4 19576 Marin Inverness Ridge west of Inverness. Comment
  JEPS37906  Plantago elongata John Thomas Howell 1947-4-30 23109 Marin Dillons Beach Comment
  SD71292  Plantago elongata John Howell 1946-4-14 21634 Marin Near Dillons Beach, Marin County Comment
  POM215031  Plantago erecta J. T. Howell 1930-4-20 4721 Marin Point Reyes Peninsula, 5 miles from Inverness. Comment
  JEPS37903  Plantago maritima var. juncoides John Thomas Howell 1945-7-8 21285 Marin San Antonio Comment
  JEPS37908  Plantago maritima var. juncoides John Thomas Howell 1944-4-23 19395 Marin Escalle Comment
  JEPS62637  Plantago maritima var. juncoides John Thomas Howell 1957-9-15 32952 Marin bordering Richardson Bay Richardson Bay Comment
  JEPS3957  Plantago truncata subsp. firma John Thomas Howell 1944-5-21 19500 Marin North side of Mt. Tamalpais; Lagunitas Meadows 243 Comment
  CDA6610  Plantago truncata subsp. firma J. T. Howell 1944-5-21 19500 Marin Central Western; San Francisco Bay Area region; Lagunitas Meadows north side of Mount Tamalpais; elev. 800 ft Comment
  POM259272  Plantago truncata subsp. firma J. T. Howell 1940-4-14 15396 Marin San Anselmo Creek Canyon. Comment
  RSA40164  Plantago truncata subsp. firma J. T. Howell 1944-5-21 19500 Marin Lagunitas Meadows north side of Mount Tamalpais. 244 Comment
  RSA424277  Plantago truncata subsp. firma J. T. Howell 1944-5-21 19500 Marin Lagunitas Meadows north side of Mount Tamalpais. 244 Comment
  CAS-BOT-BC91776  Platystemon californicus John Thomas Howell 1946-3-24 21580 Marin Carson County. Comment
  CAS-BOT-BC91779  Platystemon californicus John Thomas Howell 1940-5-20 15497 Marin Point Reyes. Comment
  CAS-BOT-BC91780  Platystemon californicus John Thomas Howell 1940-5-20 15498 Marin Point Reyes. Comment
  JEPS58886  Plectritis brachystemon John Thomas Howell 1947-4-30 23110 Marin Dillons Beach Comment
  CAS-BOT-BC175946  Plectritis ciliosa subsp. insignis John Thomas Howell 1946-3-17 s.n. Marin Between Bootjack & Mt. Theater, Mt. Tamalpais Comment
  JEPS58883  Plectritis macrocera John Thomas Howell 1946-4-13 21599 Marin Summit meadow to Rock Spring, Mount Tamalpais Rock Spring; Mount Tamalpais Comment
  HSC10609  Pleuropogon californicus J. T. Howell 1945-5-9 20828 Marin Between Hamilton Field and Ignacio. Comment
  SEINET195361 Image available Pleuropogon californicus J. T. Howell 1945-5-9 20828 Marin Between Hamilton Field and Ignacio. Comment
  CAS-BOT-BC260933  Pleuropogon californicus var. californicus John Thomas Howell 1941-6-10 16280 Marin Near Black Point Comment
  CAS-BOT-BC260952  Pleuropogon californicus var. californicus John Thomas Howell 1941-6-10 16280 Marin Near Black Point Comment
  CAS-BOT-BC260954  Pleuropogon californicus var. californicus John Thomas Howell 1945-5-9 20828 Marin Between Hamilton Field and Ignacio Comment
  POM273149  Pleuropogon californicus var. californicus J. T. Howell 1945-5-9 20828 Marin between Hamilton Field and Ignacio, Marin County Comment
  UCD90155  Pleuropogon californicus var. californicus John Thomas Howell 1945-5-9 20828 Marin between Hamilton Field and Ignacio. Comment
  UC1177490  Pleuropogon hooverianus John Thomas Howell 1947-4-27 23107 Marin Ross Comment
  UCD90097  Pleuropogon hooverianus John Thomas Howell 1943-5-22 18155 Marin Lagunitas Meadows. Comment
  UCD90098  Pleuropogon hooverianus John Thomas Howell 1947-4-27 23107 Marin Ross. Comment
  CAS-BOT-BC255116  Poa confinis John Thomas Howell; et al. 1980-6-19 s.n. Marin Back of the dunes, near Abbotts Lagoon, Point Reyes Peninsula Comment
  CAS-BOT-BC254660  Poa douglasii John Thomas Howell 1946-4-21 21687 Marin Near the radio station, Point Reyes Peninsula Comment
  CAS-BOT-BC254661  Poa douglasii John Thomas Howell 1946-5-4 21741 Marin Dillons Beach Comment
  UC1177123  Poa douglasii John Thomas Howell 1946-5-4 21741 Marin Dillon's Beach Comment
  CAS-BOT-BC246654  Poa howellii John Thomas Howell 1941-5-25 16203 Marin Arturo Trail, Mt. Tamalpais Comment
  CAS-BOT-BC246655  Poa howellii John Thomas Howell 1943-4-11 17913 Marin Black Canyon, San Rafael hills Comment
  CAS-BOT-BC246665  Poa howellii John Thomas Howell 1946-5-12 21792 Marin Carson Ridge Comment
  CAS-BOT-BC246664  Poa howellii John Thomas Howell 1947-4-27 23086 Marin Black Mt. west of San Anselmo Comment
  SEINET10605756  Poa howellii John Thomas Howell 1939-5-14 Howell 14674 Marin Berry Trail, Mt. Tamalpais. Comment
  CAS-BOT-BC255853  Poa kelloggii John Thomas Howell 1950-5-18 26311 Marin Lagunitas Creek near Camp Taylor Comment
  CAS-BOT-BC247324  Poa pratensis John Thomas Howell 1943-5-22 18116 Marin Fairfax Comment
  CAS-BOT-BC247325  Poa pratensis John Thomas Howell 1943-5-9 17947 Marin San Rafael Comment
  CAS-BOT-BC236222  Poa secunda subsp. secunda John Thomas Howell 1946-5-16 21895 Marin Angel Island, N side Comment
  CAS-BOT-BC236224  Poa secunda subsp. secunda John Thomas Howell 1943-5-15 18093 Marin Tiburon Peninsula, S end Comment
  UC1177120  Poa secunda subsp. secunda John Thomas Howell 1943-5-2 17931 Marin Big Carson Canyon Comment
  CAS-BOT-BC244164  Poa trivialis John Thomas Howell 1946-6-16 22076 Marin Inverness Park Comment
  CAS-BOT-BC244212  Poa unilateralis John Thomas Howell 1946-6-9 22008 Marin Pierce Ranch, N Point Reyes Peninsula Comment
  CAS-BOT-BC244214  Poa unilateralis John Thomas Howell 1933-4-12 10995 Marin Sausalito hills Comment
  CAS-BOT-BC244215  Poa unilateralis John Thomas Howell 1946-5-26 21953 Marin Point Reyes Lighthouse Comment
  UC1177118  Poa unilateralis John Thomas Howell 1939-6-4 Marin Pt Reyes Lighthouse Comment
  UC526154  Poa unilateralis John Thomas Howell 1933-4-12 10995 Marin Sausalito hills Sausalito Comment
  RSA127049  Polygonum aviculare J. T. Howell 1944-5-7 19428 Marin Greenbrae. Comment
  CAS-BOT-BC414006  Polygonum aviculare subsp. aviculare John Thomas Howell 1944-5-7 19428 Marin Greenbrae Comment
  CAS-BOT-BC414007  Polygonum aviculare subsp. aviculare John Thomas Howell 1939-7-2 14814 Marin Border of Almonte salt marsh Comment
  CAS-BOT-BC414008  Polygonum aviculare subsp. aviculare John Thomas Howell 1945-8-19 21414 Marin Inverness Comment
  CAS-BOT-BC414009  Polygonum aviculare subsp. aviculare John Thomas Howell 1945-7-15 21291 Marin Fairfax Comment
  CAS-BOT-BC414011  Polygonum aviculare subsp. aviculare John Thomas Howell 1939-6-25 14812 Marin Cascade Canyon, Mill Valley Comment
  CAS-BOT-BC414200  Polygonum aviculare subsp. depressum John Thomas Howell 1939-7-2 14813 Marin Border of Almonte salt marsh Comment
  UC1176915  Polygonum douglasii subsp. spergulariiforme John Thomas Howell 1947-9-6 24182 Marin e Dillons Beach Comment
  RSA127094  Polygonum fowleri J. T. Howell 1945-7-8 21282 Marin Burdell Station Comment
  UC1106194  Polygonum marinense John Thomas Howell 1945-7-8 21282 Marin Burdell; salt marshes Comment
  CAS-BOT-BC419803  Polygonum marinense John Thomas Howell 1945-6-3 s.n. Marin Inverness Comment
  RSA127091  Polygonum patulum J. T. Howell 1945-7-8 21284 Marin San Antonio Staion Comment
  CAS-BOT-BC420979  Polygonum spergulariiforme John Thomas Howell 1946-9-20 23021 Marin East of Dillons Beach Comment
  CAS-BOT-BC420980  Polygonum spergulariiforme John Thomas Howell 1947-9-6 24182 Marin East of Dillons Beach Comment
  CAS-BOT-BC420981  Polygonum spergulariiforme John Thomas Howell 1946-9-20 23021 Marin East of Dillons Beach Comment
  RSA127092  Polygonum spergulariiforme J. T. Howell 1947-9-6 24182 Marin E of Dillons Beach Comment
  UC1177502  Polypodium John Thomas Howell 1947-3-23 23046 Marin Cataract Gulch Mt. Tamalpais Comment
  CAS-BOT-BC76854  Polypodium calirhiza John Thomas Howell 1966-4-6 41459 Marin Tiburon - John Thomas Howell Botanical Garden Comment
  RSA127244  Polypogon interruptus J. T. Howell 1943-6-13 s.n. Marin Sausalito. Comment
  UC1177496  Polypogon interruptus John Thomas Howell 1945-6-24 Marin Rock Spring to Laurel Dell Mt. Tamalpais; , Rock Spring to Laurel Dell Comment
  CAS-BOT-BC233026  Polypogon interruptus John Thomas Howell 1945-6-12 20950 Marin Papermill Creek at highway spring Comment
  CAS-BOT-BC233237  Polypogon maritimus John Thomas Howell 1958-6-28 33633 Marin S side of Alpine Lake, near Bon Tempe Dam, Mount Tamalpais Comment
  CAS-BOT-BC233238  Polypogon maritimus John Thomas Howell 1958-6-28 33637 Marin Near Willow Meadow, Mount Tamalpais Comment
  CAS-BOT-BC233239  Polypogon maritimus John Thomas Howell 1945-6-24 21236 Marin Willow Meadows, Mount Tamalpais Comment
  UCD91200  Polypogon maritimus John Thomas Howell 1958-6-28 33633 Marin South side of Alpine Lake near Bon Tempe Dam, Mt. Tamalpais. Comment
  RSA127245  Polypogon monspeliensis J. T. Howell 1939-7-2 s.n. Marin Pirates Cove. Comment
  SEINET199938 Image available Polypogon monspeliensis J. T. Howell 1945-6-6 Marin Mt Theater Mt Tamalpais Comment
  CAS-BOT-BC237513  Polypogon viridis John Thomas Howell 1943-6-8 s.n. Marin Sausalito Comment
  CAS-BOT-BC72190  Polystichum dudleyi John Thomas Howell 1948-5-22 24308 Marin Camp Tucker, Mt. Tamalpais Comment
  CAS-BOT-BC72426  Polystichum munitum John Thomas Howell 1948-5-22 24309 Marin Camp Tucker, Mt. Tamalpais Comment
  CAS-BOT-BC267190  Potamogeton foliosus John Thomas Howell 1946-7-4 s.n. Marin Back of Dillons Beach Comment
  CAS-BOT-BC267191  Potamogeton foliosus John Thomas Howell; Zannichillia 1939-9-3 s.n. Marin San Antonio Creek Comment
  CAS-BOT-BC267193  Potamogeton foliosus John Thomas Howell 1946-9-29 s.n. Marin Back of beach, Stinson Beach Comment
  CAS-BOT-BC453957  Potamogeton pectinatus John Thomas Howell 1939-8-27 15318 Marin Phoenix Lake Comment
  CAS-BOT-BC540146  Potentilla anglica John Thomas Howell 1985-10-17 s.n. Marin Growing on Arias T. between Elena Circle and Trinity Circle in Terra Linda, San Rafael Comment
  CAS-BOT-BC143091  Potentilla anserina subsp. pacifica John Thomas Howell 1947-5-21 23194 Marin Tiburon Comment
  CAS-BOT-BC143093  Potentilla anserina subsp. pacifica John Thomas Howell 1966-4-18 41508 Marin Gully just north of John Thomas Howell Botanical Garden, Tiburon Comment
  UC1177245  Prunus emarginata John Thomas Howell 1943-5-30 18191 Marin Mount Tamalpais, Arturo Trail Mount Tamalpais; , Arturo Trail Comment
  CAS-BOT-BC356740  Pseudognaphalium californicum John Thomas Howell 1939-7-2 14828 Marin Ridge between Tennessee Cove and Pirates Cove Comment
  UC1177295  Pseudognaphalium californicum John Thomas Howell 1945-7-29 21344 Marin Bolinas Comment
  CAS-BOT-BC356735  Pseudognaphalium californicum John Thomas Howell 1966-6-9 s.n. Marin John Thomas Howell Botanical Garden, Tiburon. Along road se. of church Comment
  CAS-BOT-BC357305  Pseudognaphalium microcephalum John Thomas Howell 1945-9-2 21455 Marin San Rafael Hills Comment
  UC1026368  Psilocarphus chilensis John Thomas Howell 1952-6-3 28323 Marin near radio station Pt. Reyes Peninsula Comment
  UC1106195  Pterostegia drymarioides John Thomas Howell 1945-5-6 20806 Marin San Rafael Hills Comment
  CAS-BOT-BC460616  Pyrola aphylla John Thomas Howell 1940-5-12 15410 Marin Woods south of Lagunitas Comment
  UC1177324  Quercus X chasei John Thomas Howell 1946-12-22 23035 Marin Greenbrae Hills Comment
  UC1177414  Quercus X eplingii John Thomas Howell 1946-5-19 21904 Marin near Camp Lihienthal; Fairfax Hills Comment
  CAS-BOT-BC104202  Quercus X morehus John Thomas Howell 1939-10-29 s.n. Marin San Geronimo Ridge Comment
  UC1177411  Quercus X morehus John Thomas Howell 1948-5-16 24297 Marin upper Cascade Canyon Mt. Tamalpais Quad. Comment
  CAS-BOT-BC104414  Quercus X subconvexa John Thomas Howell 1939-5-21 s.n. Marin on wind-swept hill above Tiburon Comment
  CAS-BOT-BC104415  Quercus X subconvexa John Thomas Howell 1939-10-15 s.n. Marin near Liberty Camp Comment
  CAS-BOT-BC104420  Quercus X subconvexa John Thomas Howell 1952-5-15 28314 Marin Serpentine at S end of Tiburon Peninsula Comment
  CAS-BOT-BC104421  Quercus X subconvexa John Thomas Howell 1959-8-23 34601 Marin near Barths Retreat, Mt. Tamalpais Comment
  RSA201425  Quercus X subconvexa J. T. Howell 1959-8-23 34601 Marin Near Barth's Retreat, Mt. Tamalpais. Comment
  UC1177409  Quercus X subconvexa John Thomas Howell 1940-5-26 15525 Marin San Anselmo Canyon Comment
  UCD47295  Quercus X subconvexa John Thomas Howell 1952-5-15 28314 Marin Serpentine at south end of Tiburon Peninsula, Marin Co. Comment
  CAS-BOT-BC45634  Quercus agrifolia John Thomas Howell 1947-3-23 23048 Marin Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC45636  Quercus agrifolia John Thomas Howell 1926-9-9 2190 Marin hills ne. of San Rafael Comment
  UC1177419  Quercus berberidifolia John Thomas Howell 1947-8-31 24176 Marin sw of (above) Meadows Club (Ridgecrest Road) Comment
  CAS-BOT-BC62540  Quercus chrysolepis John Thomas Howell 1956-9-23 31878 Marin Near Laurel Dell, Mt. Tamalpais Comment
  RSA121001  Quercus chrysolepis J. T. Howell 1956-9-23 31878 Marin Near Laurel Dell, Mt. Tamalpais. Comment
  CAS-BOT-BC79765  Quercus durata John Thomas Howell 1945-4-17 s.n. Marin Windswept Hill above Tiburon Comment
  CAS-BOT-BC79766  Quercus durata John Thomas Howell 1926-2-28 1651 Marin Rock Spring Trail, Mt. Tamalpais Comment
  CAS-BOT-BC94355  Quercus garryana John Thomas Howell; John Tucker 1947-8-31 24177 Marin Black Canyon, San Rafael Hills Comment
  CAS-BOT-BC94356  Quercus garryana John Thomas Howell 1945-7-15 21301 Marin Fairfax Hills near Camp Lilienthal Comment
  CAS-BOT-BC94357  Quercus garryana John Thomas Howell 1945-7-15 21301 Marin Fairfax Hills near Camp Lilienthal Comment
  CAS-BOT-BC104882  Quercus wislizeni John Thomas Howell 1927-8-22 3035 Marin on S side of Mt. Tamalpais above Mill Valley 213 Comment
  CAS-BOT-BC362485  Rafinesquia californica John Thomas Howell 1945-6-3 20937 Marin Shell Beach Comment
  UC1106070  Ranunculus aquatilis var. capillaceus John Thomas Howell 1946-5-4 21744 Marin Dillons Beach Comment
  CAS-BOT-BC379005  Ranunculus aquatilis var. diffusus John Thomas Howell 1946-5-4 21744 Marin Dillons Beach Comment
  CAS-BOT-BC378738  Ranunculus californicus var. cuneatus John Thomas Howell 1946-4-14 21631 Marin near Dillons Beach Comment
  RSA127210  Ranunculus pusillus J. T. Howell 1945-5-9 20840 Marin between Hamilton Field and Ignacio. Comment
  UC1176749  Ranunculus uncinatus John Thomas Howell 1945-6-3 20928 Marin Shell Beach Comment
  CAS-BOT-BC74188  Raphanus raphanistrum John Thomas Howell 1988-8-8 s.n. Marin Terra Linda Vegetable Garden. San Rafael. Comment
  CAS-BOT-BC59950  Rhamnus crocea John Thomas Howell 1941-6-8 16266 Marin Hills ne. of San Rafael. Comment
  POM203620  Rhamnus crocea J. T. Howell 1933-4-30 11188 Marin North side of Mt. Tamalpais. Comment
  SBBG28973  Rhamnus crocea J. T. Howell 1933-4-30 11188 Marin N side of Mt Tamalpais Comment
  UC1177451  Rhamnus crocea John Thomas Howell 1946-5-16 21884 Marin w side Angel Island Comment
  CAS-BOT-BC200051  Rhododendron occidentale var. occidentale John Thomas Howell 1943-5-30 18193 Marin Azalea Flat, Mt. Tamalpais Comment
  RSA127242  Rhynchospora californica J. T. Howell 1945-8-19 s.n. Marin Near Ledum Swamp, Point Reyes Peninsula Comment
  CAS-BOT-BC108916  Ribes divaricatum var. pubiflorum John Thomas Howell 1944-5-14 19468 Marin Salmon Creek Canyon. Comment
  CAS-BOT-BC108924  Ribes divaricatum var. pubiflorum John Thomas Howell 1941-7-6 16357 Marin Kent Trail, Mount Tamalpais. Comment
  UC1176763  Ribes divaricatum var. pubiflorum John Thomas Howell 1941-7-6 16357 Marin Kent Trail Mt. Tamalpais Comment
  CAS-BOT-BC209254  Ribes menziesii John Thomas Howell 1939-5-21 14699 Marin South end of Tiburon Peninsula Comment
  CAS-BOT-BC209264  Ribes menziesii John Thomas Howell 1943-6-6 18207 Marin Canyon below Muir Woods Comment
  CAS-BOT-BC209274  Ribes menziesii John Thomas Howell 1943-6-6 18207 Marin Canyon below Muir Woods Comment
  SEINET13942634 Image available Ribes menziesii John Thomas Howell 1946-1 21613 Marin Near Tomales Comment
  RSA0021756  Ribes menziesii var. leptosmum J. T. Howell 1943-6-13 18232 Marin Sausalito. Comment
  CAS-BOT-BC144704  Ribes sanguineum var. glutinosum John Thomas Howell 1946-6-16 s.n. Marin Inverness Park Comment
  CAS-BOT-BC144705  Ribes sanguineum var. glutinosum John Thomas Howell 1944-3-26 19341 Marin Inverness Comment
  CAS-BOT-BC168739  Ribes victoris John Thomas Howell 1943-3-7 17887 Marin Hills northeast of San Rafael Comment
  CAS-BOT-BC168742  Ribes victoris John Thomas Howell 1943-1-17 s.n. Marin Northside Trail, Mt. Tamalpais Comment
  CAS-BOT-BC168744  Ribes victoris John Thomas Howell 1941-6-8 16256 Marin Hills ne. of San Rafael Comment
  CAS-BOT-BC168745  Ribes victoris John Thomas Howell 1942-9-6 17863 Marin Northside Trail, Mt. Tamalpais Comment
  CAS-BOT-BC362913  Rigiopappus leptocladus John Thomas Howell 1942-7-12 17022 Marin Potrero Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC362911  Rigiopappus leptocladus John Thomas Howell 1969-5-5 45575 Marin North of Ring Hill, Tiburon Peninsula Comment
  CAS-BOT-BC74379  Rorippa curvipes John Thomas Howell 1939-10-15 15372 Marin Alpine Lake. Comment
  CAS-BOT-BC74378  Rorippa curvipes John Thomas Howell 1946-9-8 s.n. Marin Mount Tamalpais. Strand of Lake Lagunitas. Comment
  CAS-BOT-BC74542  Rorippa curvisiliqua John Thomas Howell 1940-5-20 15494 Marin Point Reyes. Between radio and lighthouse. Comment
  CAS-BOT-BC74543  Rorippa curvisiliqua John Thomas Howell 1946-6-16 22090 Marin Point Reyes Station. Comment
  RSA32272  Rorippa curvisiliqua J. T. Howell 1946-6-16 22090 Marin Point Reyes Station. Comment
  CAS-BOT-BC147490  Rosa californica John Thomas Howell 1944-7-2 s.n. Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC147498  Rosa californica John Thomas Howell 1946-6-30 22162 Marin Rodeo Lagoon Comment
  CAS-BOT-BC147502  Rosa californica John Thomas Howell 1944-6-25 19651 Marin Santa Venetia Comment
  UC1177435  Rosa californica John Thomas Howell 1946-6-30 22162 Marin Rodeo Lagoon Comment
  UC1177434  Rosa eglanteria John Thomas Howell 1946-6-13 22057 Marin n Dillons Beach; Estero School Comment
  CAS-BOT-BC148226  Rosa spithamea John Thomas Howell 1942-6-21 17001 Marin San Anselmo Canyon Comment
  CAS-BOT-BC148227  Rosa spithamea John Thomas Howell 1945-8-12 21376 Marin Chaparral near Azalea Flat, Mt. Tamalpais Comment
  CAS-BOT-BC148229  Rosa spithamea John Thomas Howell 1946-9-8 23001 Marin Burned area sw. of Lake Lagunitas, Mt. Tamalpais Comment
  CAS-BOT-BC148230  Rosa spithamea John Thomas Howell 1946-5-12 21819 Marin Carson Ridge Comment
  CAS-BOT-BC148231  Rosa spithamea John Thomas Howell 1946-9-8 23001 Marin Burned area sw. of Lake Lagunitas, Mt. Tamalpais Comment
  UC1177432  Rosa spithamea John Thomas Howell 1946-9-8 23001 Marin sw Lake Lagunitas; Mt. Tamalpais Comment
  UCD113764  Rubus armeniacus John Thomas Howell 1943-8-29 19311 Marin Summit Avenue Ridge, Mill Valley. Comment
  CAS-BOT-BC156625  Rubus bifrons John Thomas Howell 1943-8-29 19311 Marin Summit (Avenue) Ridge, Mill Valley Comment
  JEPS30811  Rubus discolor John Thomas Howell 1943-8-29 19311 Marin Summit (Avenue) Ridge Mill Valley; , Summit (Avenue) Ridge Comment
  POM303729  Rubus discolor J. T. Howell 1943-8-29 19311 Marin extensive brambles, generally in partly shaded draws, summit Ridge Mill Valley, Marin Comment
  RSA40148  Rubus discolor J. T. Howell 1943-8-29 19311 Marin Summit (Avenue[?]) Ridge. Mill Valley. Comment
  CAS-BOT-BC147261  Rubus parviflorus John Thomas Howell 1939-6-25 14807 Marin Mt. Tamalpais Comment
  CAS-BOT-BC156741  Rubus spectabilis John Thomas Howell 1926-2-22 1643 Marin Inverness Comment
  CAS-BOT-BC158718  Rubus ulmifolius John Thomas Howell 1943-9-5 19313 Marin Between Tamalpais Valley and Tamalpais High School Comment
  CAS-BOT-BC158719  Rubus ulmifolius John Thomas Howell 1943-9-5 19313 Marin Between Tamalpais Valley and Tamalpais High School Comment
  UC1177241  Rubus ulmifolius var. inermis John Thomas Howell 1943-9-5 19313 Marin between Tamalpais Valley and Tamalpais High School; between Tamalpais Valley and Tamalpais H.S. Comment
  CAS-BOT-BC158835  Rubus ursinus John Thomas Howell 1938-5-22 13799 Marin San Anselmo Canyon Comment
  CAS-BOT-BC158840  Rubus ursinus John Thomas Howell 1938-6-19 13918 Marin Azalea Flat, Mt. Tamalpais Comment
  CAS-BOT-BC158841  Rubus ursinus John Thomas Howell 1938-6-5 13898 Marin Azalea Flat, Mt. Tamalpais Comment
  CAS-BOT-BC158843  Rubus ursinus John Thomas Howell 1938-6-19 13921 Marin Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC158847  Rubus ursinus John Thomas Howell 1938-6-5 13906 Marin Near West Point, Mt. Tamalpais Comment
  CAS-BOT-BC158848  Rubus ursinus John Thomas Howell 1938-6-5 13906 Marin Near West Point, Mt. Tamalpais Comment
  CAS-BOT-BC158849  Rubus ursinus John Thomas Howell 1938-6-19 13929 Marin Near Rattlesnake, Mt. Tamalpais Comment
  CAS-BOT-BC158851  Rubus ursinus John Thomas Howell 1938-5-22 13801 Marin San Anselmo Canyon Comment
  CAS-BOT-BC158853  Rubus ursinus John Thomas Howell 1938-5-22 13788 Marin San Anselmo Canyon Comment
  CAS-BOT-BC158856  Rubus ursinus John Thomas Howell 1943-4-11 17894 Marin Black Canyon, San Rafael Hills Comment
  RSA26238  Rubus ursinus J. T. Howell 1938-5-22 13799 Marin San Anselmo Canyon. Comment
  POM261516  Rubus vitifolius J. T. Howell 1938-5-22 13799 Marin San Anselmo Canyon. Comment
  UC1176990  Rumex John Thomas Howell 1953-7-3 Marin Tamalpais Valley Comment
  CAS-BOT-BC421532  Rumex crassus John Thomas Howell 1946-7-4 22173 Marin Dillons Beach Comment
  CAS-BOT-BC433255  Rumex crispus John Thomas Howell 1953-7-2 s.n. Marin Tamalpais Valley Comment
  CAS-BOT-BC433454  Rumex crispus John Thomas Howell 1953-7-2 29103 Marin Tamalpais Valley Comment
  CAS-BOT-BC433664  Rumex obtusifolius John Thomas Howell 1943-7-4 18278 Marin Inverness Comment
  CAS-BOT-BC433665  Rumex obtusifolius John Thomas Howell 1941-6-29 16346 Marin Cascade Canyon, Mill Valley Comment
  CAS-BOT-BC433720  Rumex occidentalis John Thomas Howell 1944-5-28 19517 Marin Almonte Comment
  CAS-BOT-BC433721  Rumex occidentalis John Thomas Howell 1947-6-18 23287 Marin North of Dillons Beach Comment
  CAS-BOT-BC433745  Rumex persicarioides John Thomas Howell 1959-9-10 34608 Marin Bolinas Comment
  UC1106150  Rumex pulcher John Thomas Howell 1939-5-14 Marin Ross Comment
  CAS-BOT-BC433784  Rumex pulcher John Thomas Howell 1949-6-26 25351 Marin Deer Park, Fairfax hills Comment
  CAS-BOT-BC433934  Rumex salicifolius John Thomas Howell 1946-7-7 22204 Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC433935  Rumex salicifolius John Thomas Howell 1941-6-8 16246 Marin Hills ne. of San Rafael Comment
  CAS-BOT-BC433932  Rumex salicifolius John Thomas Howell 1944-6-28 19635 Marin San Rafael Comment
  CAS-BOT-BC6019  Rumex salicifolius f. ecallosus John Thomas Howell 1943-6-13 18235 Marin Sausalito Comment
  UC1176815  Rumex salicifolius var. denticulatus John Thomas Howell 1945-7-29 21336 Marin Bolinas Comment
  UC1176809  Rumex salicifolius var. salicifolius John Thomas Howell 1946-7-7 22204 Marin Potrero Meadow Mt. Tamalpais Comment
  UC1176811  Rumex salicifolius var. salicifolius John Thomas Howell 1945-9-2 21460 Marin San Rafael Hills Comment
  CAS-BOT-BC434106  Rumex transitorius John Thomas Howell 1945-7-29 21336 Marin Bolinas Comment
  CAS-BOT-BC434113  Rumex transitorius John Thomas Howell 1939-11-5 15385 Marin Sausalito Comment
  CAS-BOT-BC434119  Rumex transitorius John Thomas Howell 1926-10-20 2225 Marin Near Alto Comment
  CAS-BOT-BC434103  Rumex transitorius John Thomas Howell 1939-8-27 15304 Marin Ross Comment
  CAS-BOT-BC434109  Rumex transitorius John Thomas Howell 1939-8-27 15305 Marin Ross Comment
  CAS-BOT-BC434110  Rumex transitorius John Thomas Howell 1946-7-7 22204 Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC434116  Rumex transitorius John Thomas Howell 1946-6-13 22021 Marin Chileno Valley Comment
  UC1106283  Ruppia cirrhosa John Thomas Howell 1943-10-3 19334 Marin Muir Beach Comment
  RSA127058  Ruppia maritima J. T. Howell 1943-10-3 19334 Marin Muir Beach. Comment
  RSA128314  Sagina decumbens subsp. occidentalis J. T. Howell 1946-4-21 21689 Marin Dunes near radio station, Pt. Reyes Peninsula Comment
  UC1106302  Sagina decumbens subsp. occidentalis John Thomas Howell 1944-7-9 19700 Marin Inverness Ridge Comment
  UC1106304  Sagina decumbens subsp. occidentalis John Thomas Howell 1946-4-21 21691 Marin downs near radio station Pt. Reyes Peninsula Comment
  UC1177393  Sagittaria brevirostra John Thomas Howell 1947-6-18 23261 Marin Chileno Valley Comment
  CAS-BOT-BC445631  Sagittaria brevirostra John Thomas Howell 1946-6-13 22030 Marin Chileno Valley Comment
  CAS-BOT-BC103069  Salix bonplandiana John Thomas Howell 1969-4-27 45562 Marin Bed of Lagunitas Creek north of Tocaloma Comment
  RSA98706  Salix hookeriana J. T. Howell 1952-6-3 28324 Marin Near Ledum Swamp. Pt. Reyes Peninsula. Comment
  UC1176801  Salix lasiandra subsp. lasiandra John Thomas Howell 1939-4-23 Marin Blythedale Canyon Comment
  CAS-BOT-BC128101  Salix lasiandra var. lasiandra John Thomas Howell 1965-10-13 s.n. Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC128150  Salix lasiandra var. lasiandra John Thomas Howell 1980-9-8 53897 Marin Between Alpine and Bon Tempe Lakes Comment
  CAS-BOT-BC107016  Salix lasiolepis John Thomas Howell 1927-1-23 2276 Marin Between Olema and Inverness Comment
  UC1176799  Salix lasiolepis John Thomas Howell 1939-9-3 Marin Ignatio Comment
  UC1176812  Salix lasiolepis John Thomas Howell 1946-7-4 22180 Marin Dillons Beach Comment
  CAS-BOT-BC107308  Salix lasiolepis var. bigelovii John Thomas Howell 1946-7-4 22180 Marin Dillons Beach Comment
  CAS-BOT-BC107310  Salix lasiolepis var. bigelovii John Thomas Howell 1946-4-14 21614 Marin Near Tomales Comment
  CAS-BOT-BC107311  Salix lasiolepis var. bigelovii John Thomas Howell 1946-6-30 22159 Marin Rodeo Lagoon Comment
  RSA126188  Salix lucida subsp. lasiandra J. T. Howell 1944-7-23 s.n. Marin Santa Venetia. Comment
  CAS-BOT-BC129504  Salix melanopsis John Thomas Howell 1945-9-16 21490 Marin Along railroad north of San Rafael Comment
  CAS-BOT-BC126416  Salix sitchensis John Thomas Howell 1939-3-26 14598 Marin Cataract Gulch, Mt. Tamalpais Comment
  CAS-BOT-BC126422  Salix sitchensis John Thomas Howell 1947-3-23 23047 Marin Cataract Gulch, Mt. Tamalpais Comment
  CAS-BOT-BC126424  Salix sitchensis John Thomas Howell 1969-4-27 45561 Marin Bed of Lagunitas Creek north of Tocaloma Comment
  JEPS58894  Sambucus mexicana John Thomas Howell 1949-6-26 25352 Marin Deer Park Fairfax hills Comment
  RSA126183  Sanguisorba minor J. T. Howell 1949-6-7 25341 Marin Aurora School, NW Marin. Comment
  UC1177238  Sanguisorba minor subsp. muricata John Thomas Howell 1949-6-7 25341 Marin Aurora School; nw Marin Co. Comment
  UC421667  Sanicula crassicaulis John Thomas Howell 1930-4-20 4744 Marin head of Drake's Bay, on road to Inverness Drake's Bay Comment
  UC421644  Sanicula laciniata John Thomas Howell 1927-3-20 2290 Marin Mount Tamalpais, Corte Madera Ridge Corte Madera Ridge; Mount Tamalpais, Corte Madera Ridge Comment
  UCD128029  Sanicula laciniata John Thomas Howell 1946-5-12 21779 Marin Carson Ridge. Comment
  RSA118026  Schedonorus arundinaceus J. T. Howell 1955-5-29 30257 Marin Between Bootjack and Mountain Theater, Mt. Tamalpais. Comment
  CAS-BOT-BC283098  Schedonorus arundinaceus John Thomas Howell 1955-6-8 30300 Marin Along highway just east of Olema Comment
  CAS-BOT-BC283099  Schedonorus arundinaceus John Thomas Howell 1955-5-29 30257 Marin Along canyon trail between Bootjack and Mountain Theater, Mt. Tamalpais Comment
  RSA127608  Schedonorus arundinaceus J. T. Howell 1955-6-8 30300 Marin Along highway, just east of Olema Comment
  CAS-BOT-BC111314  Schoenoplectus acutus var. occidentalis John Thomas Howell 1946-6-30 22169 Marin Rodeo Lagoon Comment
  UC1106077  Schoenoplectus acutus var. occidentalis John Thomas Howell 1945-8-5 21367 Marin Stinson Beach Comment
  CAS-BOT-BC111569  Schoenoplectus americanus John Thomas Howell 1945-7-8 s.n. Marin Burdell Comment
  CAS-BOT-BC111568  Schoenoplectus americanus John Thomas Howell 1944-9-10 20724 Marin Marshes north of Olema Comment
  CAS-BOT-BC111242  Schoenoplectus californicus John Thomas Howell 1944-9-10 20721 Marin Marshes north of Olema Comment
  CAS-BOT-BC111244  Schoenoplectus californicus John Thomas Howell 1945-8-19 21439 Marin Salt marsh at head of Drakes Bay. Comment
  CAS-BOT-BC111245  Schoenoplectus californicus John Thomas Howell 1946-6-30 22168 Marin Rodes Lagoon Comment
  CAS-BOT-BC111828  Schoenoplectus tabernaemontani John Thomas Howell 1944-7-9 19720 Marin South of Tomales Bay. Comment
  CAS-BOT-BC111827  Schoenoplectus tabernaemontani John Thomas Howell 1944-9-10 20722 Marin Marshes north of Olema. Comment
  UC1106076  Scirpus acutus var. occidentalis John Thomas Howell 1946-9-15 23007 Marin Hidden Lake Mt. Tamalpais, Hidden Lake Comment
  UC1106080  Scirpus californicus John Thomas Howell 1944-9-10 20721 Marin n Olema; n of Olema Comment
  CAS-BOT-BC7647  Scirpus maritimus John Thomas Howell 1945-5-20 20874 Marin Tiburon. Comment
  UC1176791  Scirpus microcarpus John Thomas Howell 1946-7-7 Marin Potrero Meadow Mt. Tamalpais, Potrero Meadow Comment
  CAS-BOT-BC240006  Scribneria bolanderi John Thomas Howell 1945-4-29 20791 Marin West of Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC240007  Scribneria bolanderi John Thomas Howell 1952-5-30 28317 Marin Along fire road between Mountain Theater and Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC243491  Scribneria bolanderi John Thomas Howell 1941-5-25 s.n. Marin Between Potrero Meadows and Mt. Theater, Mt. Tamalpais Comment
  POM273150  Scribneria bolanderi J. T. Howell 1945-4-29 20791 Marin Serpentine ridge W of Camp Handy, Mt. Tamalpais Comment
Read comments
Mar 26 2010
  RSA127278  Scribneria bolanderi J. T. Howell 1946-5-12 21776 Marin South end of Carson Ridge. Comment
  UC1177070  Scribneria bolanderi John Thomas Howell 1952-5-30 28317 Marin along fire road between Mountain theater and Potrero Meadow (Mount Tamalpais); Mount Tamalpais Comment
  UCD92519  Scribneria bolanderi John Thomas Howell 1945-4-29 20791 Marin west of Camp Handy, Mt. Tamalpais. Comment
  CAS-BOT-BC240011  Scribneria bolanderi John Thomas Howell 1945-4-29 20791 Marin West of Camp Handy, Mt. Tamalpais Comment
  UC905051  Scrophularia californica John Thomas Howell 1948-6-6 24331 Marin Bolinas Bay Sand Spit Comment
  CAS-BOT-BC240060  Secale cereale John Thomas Howell 1945-5-9 20844 Marin Ignacio Comment
  CAS-BOT-BC61492  Sedum album John Thomas Howell 1959-9-10 s.n. Marin Garden of Mrs. James Jenkins, Bolinas. Comment
  CAS-BOT-BC63948  Sedum spathulifolium John Thomas Howell 1940-5-12 s.n. Marin Lagunitas Creek canyon, Mt. Tamalpais. Comment
  CAS-BOT-BC63949  Sedum spathulifolium John Thomas Howell 1939-6-4 14717 Marin Pt. Reyes Lighthouse. Comment
  CAS-BOT-BC69749  Selaginella wallacei John Thomas Howell 1926-9-26 2193 Marin Near head of Muir Woods. Comment
  CAS-BOT-BC69747  Selaginella wallacei John Thomas Howell 1939-7-2 s.n. Marin On top of ridge e. of Muir Woods. Comment
  CAS-BOT-BC363693  Senecio hydrophilus John Thomas Howell 1946-9-20 23014 Marin Laguna in Chileno Valley Comment
  CAS-BOT-BC363709  Senecio hydrophilus John Thomas Howell 1946-6-13 22029 Marin Chileno Valley Comment
  CAS-BOT-BC363710  Senecio hydrophilus John Thomas Howell 1946-9-20 23014 Marin Laguna in Chileno Valley Comment
  CAS-BOT-BC363711  Senecio hydrophilus John Thomas Howell 1946-9-20 23014 Marin Laguna in Chileno Valley Comment
  RSA0012740  Senecio hydrophilus J. T. Howell 1946-9-20 23014 Marin Chileno Valley Comment
  UC1176879  Senecio minimus John Thomas Howell 1941-7-16 Marin s side along road near Fern Canyon; Mt. Tamalpais Comment
  CAS-BOT-BC364231  Senecio sylvaticus John Thomas Howell 1947-10-19 24192 Marin Strand of Alpine Lake Comment
  UC1176885  Senecio sylvaticus John Thomas Howell 1947-10-19 24192 Marin desiccated strand Alpine Lake; desiccated strand of Alpine Lake Comment
  UCD135755  Senecio sylvaticus John Thomas Howell 1947-10-19 24192 Marin desiccated strand of Alpine Lake. Comment
  CAS-BOT-BC364226  Senecio sylvaticus John Thomas Howell 1938-6-5 13892 Marin Mt. Tamalpais Comment
  RSA216196  Senna multiglandulosa J. T. Howell 1959-9-10 34607 Marin Spontaneous in garden of Mrs. James Jenkins, Bolinas. Comment
Read comments
Mar 9 2012
  CAS-BOT-BC85811  Sequoia sempervirens John Thomas Howell 1957-2-3 32020 Marin Fern Canyon, Mt. Tamalpais Comment
  SBBG39551  Sequoia sempervirens J. T. Howell 1957-2-3 Marin Fern Cyn, Mt Tamalpais Comment
  SD71339  Sequoia sempervirens John Thomas Howell 1957-2-3 32020 Marin Fern Canyon, Mount Tamalpais Comment
  UCD135189  Sequoia sempervirens John Thomas Howell 1957-2-3 32020 Marin Fern Canyon, Mt. Tamalpais. Comment
  SEINET10612355  Sequoia sempervirens John Thomas Howell Howell 32020 Marin Fern Canyon, Mt. Tamalpais. Short-leaved branchlets from 15-foot individual on exposed slope in the chaparral, the longer-leaved branchlets from hundred-foot trees in moist protected canyon. From California Academy of Sciences. Comment
  CAS-BOT-BC243544  Setaria parviflora John Thomas Howell 1946-9-8 22997 Marin Phoenix Lake, Mt. Tamalpais Comment
  RSA127277  Setaria parviflora J. T. Howell 1946-9-8 22997 Marin Phoenix Lake, Mt. Tamalpais. Comment
  CAS-BOT-BC243625  Setaria pumila John Thomas Howell 1954-10-21 30112 Marin Near Bootjack, Mt. Tamalpais Comment
  RSA118077  Setaria viridis J. T. Howell 1954-9-23 30110 Marin Ross, Milton H. Esberg place. Comment
  CAS-BOT-BC240193  Setaria viridis John Thomas Howell 1954-9-23 30110 Marin Milton H. Esberg place, Ross Comment
  CAS-BOT-BC187883  Sidalcea calycosa subsp. rhizomata John Thomas Howell 1946-8-23 22884 Marin Pierce Point Road, Point Reyes Peninsula Comment
  CAS-BOT-BC213152  Sidalcea calycosa subsp. rhizomata John Thomas Howell 1939-6-4 14724 Marin Pt. Reyes Peninsula Comment
  CAS-BOT-BC205541  Sidalcea hickmanii subsp. viridis John Thomas Howell 1946-6-23 22120 Marin On Carson Ridge Comment
  CAS-BOT-BC205543  Sidalcea hickmanii subsp. viridis John Thomas Howell 1942-6-21 16997 Marin Carson Ridge Comment
  POM304545  Sidalcea hickmanii subsp. viridis J. T. Howell 1942-6-21 s.n. Marin Carson Ridge Comment
  UC703117 Image available Sidalcea hickmanii subsp. viridis John Thomas Howell 1942-6-21 16997 Marin Carson Ridge Comment
  RSA95263  Sidalcea hickmanii subsp. viridis J. T. Howell 1942-6-21 16997 Marin Carson Ridge Comment
Read comments
Jan 8 2009
  CAS-BOT-BC384427  Silene coronaria John Thomas Howell 1953-7-26 29125 Marin Old railroad grade above Camp Eastwood, Mt. Tamalpais Comment
  SBBG29892  Silene multinervia J. T. Howell 1946-5-30 Marin Little Carson Cyn Comment
  UC1176819  Sisymbrium altissimum John Thomas Howell 1947-4-23 23076 Marin Point Reyes Road w of Ledum Swamp; Point Reyes Road Comment
  CAS-BOT-BC75033  Sisymbrium altissimum John Thomas Howell 1945-5-9 20846 Marin Ignacio. Comment
  RSA126195  Sisymbrium altissimum J. T. Howell 1942-4-23 23076 Marin Pt Reyes Road, west of Ledum Swamp. Comment
Read comments
Jul 18 2015
  POM203667  Sisyrinchium bellum J. T. Howell 1933-4-12 10994 Marin Sausalito hills Comment
  CAS-BOT-BC136453  Solanum rostratum J. T. Howell 1985-7-6 s.n. Marin Terra Linda. Nazareth House gardens. Comment
  CAS-BOT-BC157412  Solanum umbelliferum J. T. Howell 1945-6-30 21248 Marin Steep Ravine, Mt. Tamalpais Comment
  CAS-BOT-BC157541  Solanum umbelliferum J. T. Howell 1939-4-23 14606 Marin Blythedale Canyon, Mill Valley Comment
  CAS-BOT-BC231726  Solanum umbelliferum John Thomas Howell 1925-4-5 939 Marin Pipeline Trail Comment
  CAS-BOT-BC157464  Solanum umbelliferum J. T. Howell 1941-3-30 s.n. Marin Potrero Meadows, Mt. Tamalpais Comment
  UC1177263  Solidago spathulata John Thomas Howell 1945-9-13 21463 Marin Drakes Estero Comment
  CAS-BOT-BC365042  Solidago velutina subsp. californica John Thomas Howell 1945-9-2 21458 Marin San Rafael Hills Comment
  CAS-BOT-BC365862  Soliva sessilis John Thomas Howell 1969-4-27 45554 Marin San Rafael Hills near McNears Beach Comment
  CAS-BOT-BC365854  Soliva sessilis John Thomas Howell 1947-4-13 s.n. Marin Tiburon Peninsula Comment
  CAS-BOT-BC365855  Soliva sessilis John Thomas Howell 1973-5-9 s.n. Marin Marin Art & Garden Center, Ross Comment
  CAS-BOT-BC365864  Soliva sessilis John Thomas Howell 1967-6-8 s.n. Marin Inverness Comment
  CAS-BOT-BC365865  Soliva sessilis John Thomas Howell 1927-3-20 2289 Marin Near Alto 30 Comment
  CAS-BOT-BC374631  Sonchus oleraceus John Thomas Howell 1945-7-8 21281 Marin Burdell Comment
  CAS-BOT-BC374639  Sonchus oleraceus J. T. Howell 1990-9-28 s.n. Marin Terra Linda - in weedy Northgate planter Comment
  CAS-BOT-BC235273  Sorghum bicolor John Thomas Howell 1959-11-4 s.n. Marin Sausalito Comment
  CAS-BOT-BC235332  Sorghum halepense John Thomas Howell 1939-9-3 15344 Marin San Antonio Creek Comment
  UC1177390  Sparganium erectum subsp. stoloniferum John Thomas Howell 1945-10-14 21548 Marin Olema Marshes Comment
  CAS-BOT-BC236613  Spartina foliosa John Thomas Howell 1939-9-3 15331 Marin Corte Madera salt marsh Comment
  RSA127385  Spartina foliosa J. T. Howell 1945-8-14 21413 Marin Burdell Marshes Comment
  CAS-BOT-BC389959  Spergula arvensis John Thomas Howell 1944-7-23 19851 Marin Santa Venetia Comment
  CAS-BOT-BC390148  Spergularia bocconi John Thomas Howell 1944-6-18 s.n. Marin Phoenix Lake, Mt. Tamalpais Comment
  CAS-BOT-BC390149  Spergularia bocconi John Thomas Howell 1946-5-16 21880 Marin Angel Island, s. side Comment
  CAS-BOT-BC390150  Spergularia bocconi John Thomas Howell 1944-9-24 20744 Marin Stinson Beach Comment
  CAS-BOT-BC390151  Spergularia bocconi John Thomas Howell 1966-6-9 41555 Marin John Thomas Howell Botanical Garden, Tiburon. Se. corner of garden Comment
  CDA24129  Spergularia macrotheca J. T. Howell 1944-4-23 19397 Marin Pacific coast; Escalle. 0 Comment
  CAS-BOT-BC390347  Spergularia macrotheca var. macrotheca John Thomas Howell 1945-6-3 20938 Marin Shell Beach Comment
  CAS-BOT-BC390363  Spergularia macrotheca var. macrotheca John Thomas Howell 1944-6-25 19668 Marin Between McNear's Landing and San Rafael Comment
  CAS-BOT-BC390816  Spergularia marina John Thomas Howell 1944-6-25 19649 Marin Santa Venetia Comment
  CAS-BOT-BC390817  Spergularia marina John Thomas Howell 1944-7-23 19848 Marin Santa Venetia Comment
  CAS-BOT-BC390818  Spergularia marina John Thomas Howell 1939-4-23 14608 Marin Blythedale Canyon, Mill Valley Comment
  CAS-BOT-BC390819  Spergularia marina John Thomas Howell 1944-9-10 20735 Marin Shell Beach north of Inverness Comment
  CAS-BOT-BC390822  Spergularia marina John Thomas Howell 1945-5-9 20851 Marin Ignacio Comment
  CAS-BOT-BC390537  Spergularia media John Thomas Howell 1945-8-19 21429 Marin At head of Drakes Bay Comment
  CAS-BOT-BC390539  Spergularia media John Thomas Howell 1944-4-23 19397 Marin Escalle Comment
  CAS-BOT-BC390622  Spergularia rubra John Thomas Howell 1940-5-20 s.n. Marin Pt. Reyes Lighthouse Comment
  CAS-BOT-BC390624  Spergularia rubra John Thomas Howell 1933-4-1 10920 Marin 4.5 miles n. of San Rafael Comment
  RSA0098124  Spergularia rubra J. T. Howell 1933-4-1 10920 Marin 4.5 miles N of San Rafael. Comment
  RSA126199  Spergularia salina J. T. Howell 1944-6-25 19649 Marin Santa Venetia. Comment
  CDA3438  Spergularia villosa J. T. Howell 1944-6-25 19643 Marin Santa Venetia . Comment
  CAS-BOT-BC391007  Spergularia villosa John Thomas Howell 1944-6-25 19643 Marin Santa Venetia 7 Comment
  CAS-BOT-BC391008  Spergularia villosa John Thomas Howell 1946-5-16 21894 Marin Angel Island, n. side Comment
  CAS-BOT-BC391009  Spergularia villosa John Thomas Howell 1945-5-9 20853 Marin Between Ignacio and Novato Comment
  CAS-BOT-BC391010  Spergularia villosa John Thomas Howell 1941-6-10 16276 Marin Near Black Point Comment
  UC1177385  Spiranthes porrifolia John Thomas Howell 1946-7-7 22212 Marin Potrero Meadow Mt. Tamalpais Comment
  UC2055636  Stachys pycnantha John Thomas Howell 1937-7-4 13091 Marin Tiburon. Comment
  UC884322  Stachys pycnantha John Thomas Howell 1937-7-4 13091 Marin Tiburon Comment
  RSA0109096  Stachys pycnantha J. T. Howell 1937-7-4 13091 Marin Tiburon. Comment
  CAS-BOT-BC374826  Stebbinsoseris heterocarpa John Thomas Howell 1946-5-12 s.n. Marin Fairfax Country Club Comment
  CAS-BOT-BC374827  Stebbinsoseris heterocarpa John Thomas Howell 1944-5-27 19502 Marin Summit Ave. ridge, Mt. Tamalpais Comment
  CAS-BOT-BC374829  Stebbinsoseris heterocarpa John Thomas Howell 1947-4-27 23078 Marin Bald Mt. west of San Anselmo Comment
  CAS-BOT-BC374830  Stebbinsoseris heterocarpa John Thomas Howell 1939-5-14 14663 Marin Between Phoenix Lake and Lake Lagunitas Comment
  CAS-BOT-BC374831  Stebbinsoseris heterocarpa John Thomas Howell 1946-5-19 21908 Marin Meadows Club, Fairfax Hills Comment
  CAS-BOT-BC175354  Stellaria borealis subsp. sitchana John Thomas Howell 1944-6-4 19572 Marin Mt. Vision west of Inverness Comment
  CAS-BOT-BC397713  Stellaria nitens John Thomas Howell 1947-4-27 23084 Marin Bald Mt. W of San Anselmo Comment
  CAS-BOT-BC221855  Stenotaphrum secundatum John Thomas Howell 1987-7-8 s.n. Marin On New Albion Way near Corte Pacheco, Terra Linda Comment
  RSA32135  Stenotaphrum secundatum J. T. Howell 1945-7-22 21330 Marin Clay slope and flat W of Mill Valley on road to Muir Woods Comment
  SEINET195365 Image available Stenotaphrum secundatum J. T. Howell 1945-6-22 Marin West of Mill Valley on road to Muir Woods Comment
  UCD86395  Stenotaphrum secundatum John Thomas Howell 1945-7-22 21330 Marin West of Mill Valley on road to Muir Woods. Comment
  CAS-BOT-BC375220  Stephanomeria elata John Thomas Howell 1939-10-15 15379 Marin Fairfax Comment
  CAS-BOT-BC375221  Stephanomeria elata John Thomas Howell 1945-7-15 21296 Marin Fairfax Hills Comment
  CAS-BOT-BC375223  Stephanomeria elata John Thomas Howell 1944-9-24 20749 Marin East side of Bolinas Lagoon Comment
  UC1177276  Stephanomeria elata John Thomas Howell 1945-9-2 21456 Marin San Rafael Hills Comment
  CAS-BOT-BC375226  Stephanomeria elata John Thomas Howell 1945-10-28 21552 Marin Along road, s. end of Bolinas Ridge, Mt. Tamalpais Comment
  CAS-BOT-BC375827  Stephanomeria virgata John Thomas Howell 1939-10-15 15378 Marin Fairfax Comment
  RSA128924  Stephanomeria virgata J. T. Howell 1945-9-2 21456 Marin San Rafael Hills Comment
  UC1177278  Stephanomeria virgata subsp. pleurocarpa John Thomas Howell 1945-7-15 21295 Marin Fairfax hills Fairfax Comment
  RSA127384  Stipa manicata J. T. Howell 1946-5-16 21849 Marin Angel Island, southeast side. Comment
  CAS-BOT-BC61172  Streptanthus batrachopus John Thomas Howell 1946-6-23 22122 Marin Carson Ridge. Comment
  CAS-BOT-BC61173  Streptanthus batrachopus John Thomas Howell 1946-6-23 22122 Marin Carson Ridge. Comment
  RSA66706  Streptanthus batrachopus J. T. Howell 1946-6-23 22122 Marin Carson Ridge Comment
  SBBG29857  Streptanthus batrachopus J. T. Howell 1942-6-21 16994 Marin Carson Ridge Comment
  UC1106260  Streptanthus batrachopus John Thomas Howell 1941-7-6 16348 Marin between Camp Zeische and Barth's Retreat; Mt. Tamalpais Comment
  UC1177256  Streptanthus batrachopus John Thomas Howell 1946-5-19 21922 Marin Carson Ridge Comment
  RSA78616  Streptanthus glandulosus J. T. Howell 1944-5-21 19488 Marin South side of Phoenix Lake, Mt Tamalpais. Comment
  CAS-BOT-BC87243  Streptanthus glandulosus subsp. niger John Thomas Howell 1943-5-15 18096 Marin Tiburon peninsula. Comment
  CAS-BOT-BC87256  Streptanthus glandulosus subsp. pulchellus John Thomas Howell 1940-5-12 15425 Marin Between Little Carson and Carson Ridge. Comment
  CAS-BOT-BC87257  Streptanthus glandulosus subsp. pulchellus John Thomas Howell 1938-5-22 13791 Marin San Anselmo Canyon. Comment
  CAS-BOT-BC87258  Streptanthus glandulosus subsp. pulchellus John Thomas Howell 1938-5-22 13791 Marin San Anselmo Canyon. Comment
  CAS-BOT-BC87262  Streptanthus glandulosus subsp. pulchellus John Thomas Howell 1946-5-12 21815 Marin Carson Country. Comment
  CAS-BOT-BC87263  Streptanthus glandulosus subsp. pulchellus John Thomas Howell 1946-5-12 21815 Marin Carson Country. Comment
  UC1601609  Streptanthus glandulosus subsp. pulchellus John Thomas Howell 1938-5-22 13791 Marin San Anselmo Canyon Comment
  RSA0121905  Streptanthus glandulosus subsp. pulchellus J. T. Howell 1946-5-12 21815 Marin Carson Country Comment
  CAS-BOT-BC269578  Symphoricarpos albus var. laevigatus John Thomas Howell 1933-7-30 11475 Marin Near Inverness Comment
  CAS-BOT-BC269579  Symphoricarpos albus var. laevigatus John Thomas Howell 1939-5-21 s.n. Marin Shelter Cove, Tiburon Comment
  CAS-BOT-BC234677  Symphoricarpos mollis John Thomas Howell 1939-5-21 s.n. Marin Shelter Cove, Tiburon Comment
  CAS-BOT-BC234678  Symphoricarpos mollis John Thomas Howell 1939-8-27 15329 Marin Corte Madera Ridge, Mt. Tamalpais Comment
  CAS-BOT-BC234679  Symphoricarpos mollis John Thomas Howell 1939-6-25 14803 Marin Summit Avenue, Mill Valley Comment
  CAS-BOT-BC234680  Symphoricarpos mollis John Thomas Howell 1943-5-15 18088 Marin Tiburon Peninsula Comment
  JEPS58892  Symphoricarpos mollis John Thomas Howell 1939-6-25 14803 Marin Summit Avenue Summit Avenue, Mill Valley; Mill Valley Comment
  CAS-BOT-BC99132  Symphyotrichum chilense John Thomas Howell 1933-10-8 11708 Marin Pt. Reyes Peninsula Comment
  UC1177273  Symphyotrichum chilense J. Thomas Howell 1943-9-5 19318 Marin Mill Valley Comment
  CAS-BOT-BC99133  Symphyotrichum chilense John Thomas Howell 1933-10-8 11700 Marin 1 mile east of Forest Knolls Comment
  UC1177260  Symphyotrichum subulatum J. Thomas Howell 1947-10-19 24193 Marin Lake Lagunitas Comment
  UC1106270  Taraxacum officinale John Thomas Howell 1947-5-30 23207 Marin Ross Comment
  CAS-BOT-BC441149  Tellima grandiflora John Thomas Howell 1927-4-23 2348 Marin In a small canon just to the east of Muir Woods 121 Comment
  CAS-BOT-BC438235  Tetragonia tetragonoides John Thomas Howell 1944-6-25 19669 Marin Between McNear's Landing and San Rafael Comment
  UC1176741  Thalictrum fendleri var. polycarpum John Thomas Howell 1946-7-7 22216 Marin Potrero Meadow Mt. Tamalpais Comment
  UC1177230  Thermopsis californica var. californica John Thomas Howell 1941-7-6 16365 Marin Hidden Lake Mt. Tamalpais Comment
  CAS-BOT-BC88140  Thlaspi arvense John Thomas Howell 1988-6-5 s.n. Marin In the Terra Linda Community Garden New Albion Way opposite Cermonte Court. Comment
  CAS-BOT-BC88483  Thysanocarpus curvipes John Thomas Howell 1946-3-24 21571 Marin Near country club, Fairfax Hills. Comment
  UC1177236  Thysanocarpus curvipes John Thomas Howell 1946-5-19 21913 Marin Fairfax Hills , Meadows Club (Meadows Club) Comment
  CAS-BOT-BC88482  Thysanocarpus curvipes John Thomas Howell 1944-4-13 19376 Marin Big Rock Ridge west of Hamilton Field. Comment
  UCD128161  Torilis arvensis John Thomas Howell 1976-6-2 51808 Marin Larkspur. Comment
  CAS-BOT-BC81404  Torreya californica John Thomas Howell 1927-8-22 3034 Marin s. side of Mt. Tamalpais above Mill Valley 152 Comment
  CAS-BOT-BC81406  Torreya californica John Thomas Howell 1948-5-16 24303 Marin Near top of Eldridge Grade, Mt. Tamalpais Comment
  CAS-BOT-BC81411  Torreya californica John Thomas Howell 1948-5-16 24304 Marin Near top of Eldridge Grade, Mt. Tamalpais Comment
  UC905053  Torreya californica John Thomas Howell 1948-5-16 24304 Marin near top of Eldridge Grade Mt. Tamalpais, Eldridge Grade Comment
  NY20768  Torreya californica J. T. Howell 1948-5-16 24303 Marin This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  SEINET10471680  Torreya californica John Thomas Howell 1948-5-16 Howell 24304 Marin Near top of Eldridge Grade, Mt. Tamalpais. Comment
  RSA91414  Trifolium albopurpureum J. T. Howell 1933-4-30 11190 Marin North side of Mt. Tamalpais. Comment
  UC1106249  Trifolium albopurpureum var. dichotomum John Thomas Howell 1943-5-2 17934 Marin Big Carson Canyon Comment
  UC1177206  Trifolium albopurpureum var. dichotomum John Thomas Howell 1947-4-27 23104 Marin w side San Anselmo (type region); Bald Mtn Comment
  UC1177208  Trifolium albopurpureum var. dichotomum John Thomas Howell 1943-5-2 17932 Marin Big Carson Canyon Comment
  UC1106241  Trifolium barbigerum John Thomas Howell 1946-4-14 21620 Marin near Tomales 0 Comment
  RSA216182  Trifolium bifidum var. decipiens J. T. Howell 45556 Marin San Rafael Hills near McNears Beach. Comment
  RSA32266  Trifolium bifidum var. decipiens J. T. Howell 1946-4-18 21661 Marin Novato. Comment
  RSA128939  Trifolium dubium J. T. Howell 1946-6-16 s.n. Marin Inverness Park Comment
  UC1177203  Trifolium fucatum John Thomas Howell 1944-5-14 19473 Marin between Salmon Creek and Chileno Valley Comment
  RSA90937  Trifolium fucatum var. fucatum J. T. Howell 1946-4-18 21647 Marin Ignacio. Comment
  UC1106244  Trifolium gracilentum John Thomas Howell 1946-4-18 21662 Marin Black Point Comment
  RSA128940  Trifolium gracilentum J. T. Howell 1940-5-20 15507 Marin Point Reyes Comment
  UC1177195  Trifolium hybridum John Thomas Howell 1945-7-29 21347 Marin Bolinsa Comment
  UC1177207  Trifolium macraei John Thomas Howell 1947-4-23 23067 Marin w Mt. Vision (Drakes Estero) Comment
  RSA128935  Trifolium macraei J. T. Howell 1949-5-25 25333 Marin Point Reyes Peninsula Comment
  RSA216197  Trifolium microdon J. T. Howell 1966-4-18 41500 Marin John Thomas Howell Botanical Garden, Tiburon. Comment
  UC1177200  Trifolium obtusiflorum John Thomas Howell 1942-6-7 16972 Marin above Fairfax (San Anselmo Canyon) Comment
  RSA128925  Trifolium oliganthum J. T. Howell 1947-4-27 23080 Marin Bald Mt. west of San Anselmo Comment
  UC1177194  Trifolium repens John Thomas Howell 1945-7-29 Marin Bolinas Comment
  CDA28060  Trifolium variegatum var. major J. T. Howell, Catherine Best, Wilma Follette, G. H. True 1980-6-19 53716 Marin Near Abbotts Lagoon, Point Reyes Peninsula. 0 Comment
  UC1106250  Trifolium variegatum var. melananthum John Thomas Howell 1945-5-9 20332 Marin between Hamilton Field and Ignacio Comment
  UC1177199  Trifolium wormskioldii John Thomas Howell 1940-5-20 15505 Marin Point Reyes Comment
  RSA32119  Triglochin concinna J. T. Howell 1944-7-9 19711 Marin South end of Tomales Bay Comment
  SEINET3404244 Image available Triglochin concinna John Thomas Howell 1945-6-30 21256 Marin Stinson Beach, Salt marsh bordering Bolinas Lagoon Comment
  CAS-BOT-BC451831  Triglochin maritima John Thomas Howell 1944-6-25 19659 Marin Between Santa Venetia and Chinese Camp Comment
  CAS-BOT-BC451836  Triglochin maritima John Thomas Howell 1944-5-7 19448 Marin Larkspur salt marsh Comment
  CAS-BOT-BC451845  Triglochin maritima John Thomas Howell 1944-5-28 19519 Marin Almonte Comment
  CAS-BOT-BC451833  Triglochin maritima John Thomas Howell 1944-7-9 19710 Marin South end of Tomales Bay Comment
  CAS-BOT-BC451837  Triglochin maritima John Thomas Howell 1941-6-8 16272 Marin McNear's Landing Comment
  CAS-BOT-BC451852  Triglochin maritima John Thomas Howell 1945-6-30 21256 Marin Marsh bordering Bolinas Lagoon, Stinson Beach Comment
  CAS-BOT-BC451855  Triglochin maritima John Thomas Howell 1944-7-9 19711 Marin South end of Tomales Bay Comment
  RSA216172  Triglochin maritima J. T. Howell 1957-9-15 32960 Marin Larkspur Comment
  UC1106280  Triglochin striata John Thomas Howell 1946-7-4 22178 Marin Dillons Beach Comment
  JEPS58927  Triphysaria eriantha subsp. eriantha John Thomas Howell 1946-4-14 21627 Marin near Dillons Beach; near Dillons Beach Comment
  JEPS58926  Triphysaria eriantha subsp. rosea John Thomas Howell 1947-4-23 23073 Marin Drakes Estero w Mt. Vision; Drakes Estero w of Mt. Vision Comment
  CAS-BOT-BC238514  Triphysaria floribunda John Thomas Howell 1939-5-28 s.n. Marin Pt. Reyes Lighthouse Comment
  CAS-BOT-BC238523  Triphysaria floribunda John Thomas Howell 1947-4-23 23074 Marin Drakes Estero west of Mt. Vision Comment
  CAS-BOT-BC238512  Triphysaria floribunda John Thomas Howell 1930-4-20 4743 Marin 1.5 miles from Pt. Reyes on road to Inverness Comment
  CAS-BOT-BC199636  Trisetum canescens John Thomas Howell 1946-5-26 s.n. Marin Pt. Reyes Lighthouse Comment
  CAS-BOT-BC199637  Trisetum canescens John Thomas Howell 1939-5-14 14659 Marin Ross Comment
  CAS-BOT-BC199638  Trisetum canescens John Thomas Howell 1943-5-22 18147 Marin Fairfax Hills Comment
  CAS-BOT-BC199639  Trisetum canescens John Thomas Howell 1943-5-15 18087 Marin Tiburon Peninsula Comment
  CAS-BOT-BC199644  Trisetum canescens John Thomas Howell 1941-6-29 16344 Marin Between Laurel Dell and Rock Spring, Mt. Tamalpais Comment
  CAS-BOT-BC199645  Trisetum canescens John Thomas Howell 1941-5-25 16226 Marin Potrero Meadow, Mt. Tamalpais Comment
  RSA127276  Trisetum canescens J. T. Howell 1943-6-10 s.n. Marin Barth's [?] Retreat, Mt. Tamalpais. Comment
  UC1106123  Trisetum canescens John Thomas Howell 1946-7-7 Marin Potrero Meadows; Mt. Tamalpais Comment
  SEINET199895 Image available Trisetum canescens John Thomas Howell 1949-6-25 Marin Camp Taylor. Comment
  UC1177396  Triteleia hyacinthina John Thomas Howell 1946-7-7 22211 Marin Potrero Meadow Mt. Tamalpais, Potrero Meadow Comment
  CAS-BOT-BC522017  Triteleia hyacinthina John Thomas Howell 1946-7-7 22211 Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC526097  Triteleia laxa John Thomas Howell 1947-6-18 23280 Marin North of Dillon Beach Comment
  CAS-BOT-BC527402  Triteleia peduncularis John Thomas Howell 1966-7-20 41986 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC527405  Triteleia peduncularis John Thomas Howell 1937-7-4 13090 Marin Tiburon Comment
  CAS-BOT-BC200478  Triticum aestivum John Thomas Howell 1944-6-25 s.n. Marin San Rafael Comment
  CAS-BOT-BC200479  Triticum aestivum John Thomas Howell 1945-5-9 s.n. Marin Ignacio Comment
  CAS-BOT-BC73965  Turritis glabra John Thomas Howell 1941-5-25 16197 Marin Near Bootjack, Mount Tamalpais. Comment
  CAS-BOT-BC73966  Turritis glabra John Thomas Howell 1946-6-9 s.n. Marin Abbotts Lagoon. Comment
  NY752416  Typha angustifolia J. T. Howell 1944-5-28 19521 Marin Between Almonte and Mill Valley Comment
  UC1177421  Typha angustifolia John Thomas Howell 1944-5-28 19521 Marin between Almonte and Mill Valley; between Almonte and Mill Valley Comment
  CAS-BOT-BC381915  Uropappus lindleyi John Thomas Howell 1947-4-27 23082 Marin Bald Mt. west of San Anselmo Comment
  CAS-BOT-BC381920  Uropappus lindleyi John Thomas Howell 1947-4-27 23082 Marin Bald Mt. west of San Anselmo Comment
  CAS-BOT-BC381923  Uropappus lindleyi John Thomas Howell 1945-5-6 20802 Marin San Rafael Hills Comment
  UC1176919  Uropappus lindleyi John Thomas Howell 1945-5-6 20802 Marin SAn Rafael Hills Comment
  CAS-BOT-BC381914  Uropappus lindleyi John Thomas Howell 1967-5-24 42254 Marin Dakin Lane, just north of Old St. Hilary's Church, Tiburon Comment
  CAS-BOT-BC403945  Urtica dioica subsp. gracilis John Thomas Howell 1946-6-16 22074 Marin Inverness Peak Comment
  CAS-BOT-BC404152  Urtica dioica subsp. holosericea John Thomas Howell 1945-8-5 21365 Marin Near Stinson Beach at high tide line Comment
  CAS-BOT-BC404327  Urtica urens John Thomas Howell 1946-4-14 21636 Marin Chileno Valley Comment
  CAS-BOT-BC193936  Vaccinium ovatum John Thomas Howell 1947-3-2 23042 Marin Above Phoenix Lake, Mt. Tamalpais Comment
  JEPS54486  Valerianella locusta John Thomas Howell 1967-5-21 42252 Marin Larkspur Comment
  CAS-BOT-BC176095  Valerianella locusta John Thomas Howell 1967-5-21 42252 Marin In garden of Malcolm & Laura Smith, Larkspur Comment
  RSA40151  Verbena bonariensis J. T. Howell 1943-9-5 19323 Marin In southern part of Mill Valley. 8 Comment
  CDA5683  Verbena incompta J. T. Howell 1943-9-5 19323 Marin San Francisco Bay Region; Southern part of Mill Valley. Comment
  UCR139460  Verbena incompta J. T. Howell 1943-9-5 19323 Marin San Francisco Bay Region, southern part of Mill Valley 8 Comment
  SEINET1007908  Verbena incompta John Thomas Howell 1943-1 19323 Marin Waste places in southern part of Mill Valley. 8 Comment
  JEPS58913  Veronica serpyllifolia subsp. humifusa John Thomas Howell 1947-5-4 23116 Marin San Rafael Comment
  RSA126207  Vicia angustifolia J. T. Howell s.n. Marin Stinson Beach Comment
  RSA126208  Vicia angustifolia J. T. Howell 20843 Marin Ignacio. Comment
  UC750599  Vicia benghalensis John Thomas Howell 1945-5-20 Marin Tiburon Comment
  RSA32140  Vicia benghalensis J. T. Howell 1945-5-20 s.n. Marin Tiburon. Comment
  UCD108781  Vicia benghalensis John Thomas Howell 1945-5-20 s.n. Marin Tiburon. Comment
  UCD108782  Vicia benghalensis John Thomas Howell 1945-5-20 s.n. Marin Tiburon. Comment
  UC1177469  Vicia hassei John Thomas Howell 1943-5-9 17979 Marin San Rafael hills; San Rafael Comment
  RSA32267  Vicia hassei J. T. Howell 1946-4-18 21658 Marin Novato. Comment
  UC1177462  Vicia hirsuta John Thomas Howell 1943-7-4 18281 Marin near Inverness Comment
  RSA126210  Vicia lutea J. T. Howell 1944-5-14 19466 Marin Salmon Creek Canyon Comment
  UC1177461  Vicia sativa subsp. nigra John Thomas Howell 1946-5-12 21760 Marin near Fairfax Comment
  CAS-BOT-BC175963  Viola adunca John Thomas Howell 1925-4-5 909 Marin Pipline Trail Comment
  UC1177455  Viola ocellata John Thomas Howell 1946-5-14 21841 Marin Potrero Meadow; Mount Tamalpais, Potrero Meadow Comment
  RSA216154  Viola tricolor J. T. Howell 1959-9-10 34606 Marin Spontaneous in garden of Mrs. James Jenkins, Bolinas. Comment
  CAS-BOT-BC385082  Vitis vinifera John Thomas Howell 1988-9-7 s.n. Marin Vallecitos School, Terra Linda Comment
  CAS-BOT-BC198782  Vulpia bromoides John Thomas Howell 1943-4-11 17920 Marin Black Canyon, San Rafael Hills Comment
  CAS-BOT-BC198784  Vulpia bromoides John Thomas Howell 1933-4-30 11187 Marin North side of Mt. Tamalpais Comment
  RSA22139  Vulpia bromoides J. T. Howell 1937-6-13 13049 Marin Head of Drakes Bay, Point Reyes. Comment
  SEINET10960265  Vulpia bromoides John Thomas Howell 1943-5-9 Howell 17962 Marin San Rafael Hills. Comment
  RSA127227  Vulpia eastwoodiae J. T. Howell 1946-5-14 21840 Marin Between Barths Retreat and Potrero Meadow, Mt. Tamalpais. Comment
  CAS-BOT-BC183153  Vulpia microstachys var. ciliata John Thomas Howell 1941-5-25 10233 Marin Near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC183157  Vulpia microstachys var. ciliata John Thomas Howell 1946-5-14 21840 Marin Between Barth's Retreat and Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC183159  Vulpia microstachys var. ciliata John Thomas Howell 1945-5-27 20882 Marin Northeast of Mountain Theater, Mt. Tamalpais Comment
  CAS-BOT-BC183160  Vulpia microstachys var. ciliata John Thomas Howell 1943-5-2 17930 Marin Big Carson Canyon Comment
  CAS-BOT-BC183163  Vulpia microstachys var. ciliata John Thomas Howell 1941-6-29 16335 Marin Between Rock Spring and Laurel Dell, Mt. Tamalpais Comment
  SEINET199934 Image available Vulpia microstachys var. ciliata John Thomas Howell Marin Tiburon Comment
  UC1106312  Vulpia microstachys var. ciliata John Thomas Howell 1943-6-8 18223 Marin Bootjack; Mt. Tamalpais Comment
  SEINET10604441  Vulpia microstachys var. ciliata John Thomas Howell 1945-5-27 Howell 20882 Marin Northeast of Mountain Theater, Mt. Tamalpais. Comment
  CAS-BOT-BC184339  Vulpia microstachys var. pauciflora John Thomas Howell 1946-5-14 21839 Marin Between Barth's Retreat and Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC184344  Vulpia microstachys var. pauciflora John Thomas Howell 1933-4-30 11194 Marin North side of Mt. Tamalpais Comment
  CAS-BOT-BC184352  Vulpia microstachys var. pauciflora John Thomas Howell 1938-5-22 13792 Marin San Anselmo Canyon Comment
  CAS-BOT-BC184354  Vulpia microstachys var. pauciflora John Thomas Howell 1943-5-30 18187 Marin Northside Trail, Mt. Tamalpais Comment
  CAS-BOT-BC184362  Vulpia microstachys var. pauciflora John Thomas Howell 1943-5-15 18092 Marin Tiburon Peninsula Comment
  CAS-BOT-BC184364  Vulpia microstachys var. pauciflora John Thomas Howell 1944-5-14 19477 Marin In Chileno Valley Comment
  CAS-BOT-BC184365  Vulpia microstachys var. pauciflora John Thomas Howell 1943-5-22 18140 Marin Fairfax Hills Comment
  RSA127236  Vulpia microstachys var. pauciflora J. T. Howell 1946-5-14 21838 Marin Between Barths Retreat and Potrero Meadow, Mt. Tamalpais. Comment
  UC1106099  Vulpia microstachys var. pauciflora John Thomas Howell 1939-4-23 14617 Marin Upper Throckmorton Trail; Mt. Tamalpais Comment
  UC1106314  Vulpia microstachys var. pauciflora John Thomas Howell 1947-4-27 23088 Marin w of San Anselmo (Bald Mt); Bald Mt. Comment
  UC1177481  Vulpia microstachys var. pauciflora John Thomas Howell 1936-5-14 21839 Marin slope between Barths Retreat and Potrero Meadow; Mt. Tamalpais Comment
  POM203914  Vulpia microstachys var. pauciflora J. T. Howell 1933-4-30 11194 Marin North side of Mt. Tamalpais. Comment
  RSA127238  Vulpia myuros J. T. Howell 1943-5-22 18115 Marin Fairfax. Comment
  CAS-BOT-BC184802  Vulpia myuros subsp. megalura John Thomas Howell 1941-5-25 16209 Marin Rifle Camp, Mt. Tamalpais Comment
  CAS-BOT-BC185976  Vulpia myuros var. myuros John Thomas Howell 1943-5-22 18115 Marin Fairfax Comment
  UC1106311  Vulpia myuros var. myuros John Thomas Howell 1943-5-9 17961 Marin San Rafael Hills Comment
  CAS-BOT-BC185978  Vulpia myuros var. myuros John Thomas Howell 1943-5-9 17961 Marin San Rafael hills Comment
  RSA127237  Vulpia octoflora J. T. Howell 1946-5-12 21778 Marin Carson Ridge. Comment
  CAS-BOT-BC185971  Vulpia octoflora var. octoflora John Thomas Howell 1941-5-25 16200 Marin West Point to West Peak, Mt. Tamalpais Comment
  UC1176736  Whipplea modesta John Thomas Howell 1947-5-4 23131 Marin San Rafael Hills Comment
  CAS-BOT-BC382960  Wyethia angustifolia John Thomas Howell 1925-4-5 897 Marin Pipeline Trail Comment
  CAS-BOT-BC382961  Wyethia angustifolia John Thomas Howell 1946-6-2 21970 Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC383301  Wyethia glabra John Thomas Howell 1945-5-9 20855 Marin Between Ignacio and Novato Comment
  UC1176904  Wyethia glabra John Thomas Howell 1945-5-9 20855 Marin between Ignacio and Novato Comment
  CAS-BOT-BC383719  Xanthium strumarium John Thomas Howell 1947-10-19 24190 Marin Strand of Alpine Lake Comment
  RSA127053  Xerophyllum tenax J. T. Howell 1947-5-25 23201 Marin Kent Trail near Willow Meadows, Mt. Tamalpais Comment
  UC1177334  Xerophyllum tenax John Thomas Howell 1947-5-25 23201 Marin Kent Trail near Willow Meadow (Mount Tamalpais); Mount Tamalpais Comment
  UC1177335  Xerophyllum tenax John Thomas Howell 1947-7-9 23329 Marin above Lake Lagunitas (Mount Tamalpais); Mount Tamalpais Comment
  CAS-BOT-BC454243  Zannichellia palustris John Thomas Howell 1947-4-30 23113 Marin Near Dillons Beach Comment
  RSA127057  Zannichellia palustris J. T. Howell 1947-4-30 23113 Marin Near Dillons Beach. Comment
  CAS-BOT-BC527395  Zigadenus fontanus John Thomas Howell 1966-7-20 41983 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC530474  Zigadenus fontanus John Thomas Howell 1936-6-7 12656 Marin Mount Tamalpais, near Boot Jack Comment
  CAS-BOT-BC530475  Zigadenus fontanus John Thomas Howell 1942-6-21 17000 Marin Warm Spring, Big Carson Comment



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