CCH1:
Featuring California vascular plant data from the Consortium of California Herbaria and other sources
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Please cite data retrieved from this page:
Biodiversity data provided by the participants of the Consortium of California Herbaria (Accessed through CCH1 Data Portal, ucjeps.berkeley.edu/consortium/, 2022 December 09.

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CCH1 Portal. 2022. Biodiversity data provided by the participants of the Consortium of California Herbaria (https://ucjeps.berkeley.edu/consortium/ Accessed on December 09).

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You searched for: Isoetes howellii

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  F  CCH1_AIDherbscientific namecollectorcoll. num.formatted datecountylocality
AHUC040348DAVIsoetes howelliiBeecher Crampton97051980-04-23 SolanoSolano County, 3-4 mile north of Allendale store, 1-4 mile north of Allendale road along Winters road.
AHUC37721DAVIsoetes howelliiBeecher Crampton97051980-04-23 SolanoSolano County: North of Allendale store.
CAS-BOT173547CASIsoetes howelliiRubtzoff, Peter; Lee, Edward73851974-05-11 SonomaTodd Road, 1.4 miles from Highway 116 and 0.6 miles from Llano Road.
CAS-BOT278749CASIsoetes howelliiSolomeshch, Ayzik; Caria, C.; Macdonald, R.; Talley, S.s.n.2009-04-27 San DiegoCleveland National Forest. Laguna Campground, Mount Laguna. About 14 miles SE of San Diego County Road S1 (also called Sunrise Hwy) from intersection with Hwy 79
CAS-BOT35924CASIsoetes howelliiSmith, Doreens.n.2002-06-29 MarinMt. Tamalpais. High Marsh.
CAS-BOT368083CASIsoetes howelliide Nevers, Greg112091998-04-28 SonomaCresta Ranch, Cresta Road east of Mark West Lodge
CAS-BOT368087CASIsoetes howelliide Nevers, Greg112201998-03-20 SonomaCresta Ranch, Mark West Creek
CAS-BOT376227CASIsoetes howelliide Nevers, Greg101631992-06-16 SonomaPepperwood Ranch Natural Preserve. 3450 Franz Valley Road. In Weimar Pond
CAS-BOT531465CASIsoetes howelliiWilliams, A.; O′Connor, M. C.; Truitt, R.; Young, A.; Brostrom, R.158102015-06-12 MarinMount Tamalpais. Marin Municipal Water District lands: alongside Alpine Lake
CAS-BOT57718CASIsoetes howelliiWheeler, Clare R.4961978-07-11 MendocinoEden Valley Road 3 mi. N.E. of Hearst
CAS-BOT57719CASIsoetes howelliiWheeler, Clare R.; Smith, Gladys L.23371981-05-27 MendocinoEden Valley Ranch South Pond at summit of road 7 miles N. of Hearst
CAS-BOT57720CASIsoetes howelliiEastwood, Alice; Howell, John Thomas44501937-05-31 MendocinoSherwood Valley
CAS-BOT57721CASIsoetes howelliiTrue, Gordon H.42051968-05-02 Mendocino2 miles north of Point Arena between Coast Highway and beach
CAS-BOT57722CASIsoetes howelliiBreedlove, D. E.362001974-04-27 Napaalong Silverado Trail just north of junction with Oak Knoll Road
CAS-BOT57723CASIsoetes howelliiParish, S. B.; Parish, W. F.14401882-08-01 San BernardinoBear Valley, San Bernardino Mts.
CAS-BOT57724CASIsoetes howelliiMunz, Philip A.105381926-06-28 San BernardinoBluff Lake, San Bernardino Mts.
CAS-BOT57725CASIsoetes howelliiParish, S. B.; Parish, W. F.14401882-08-01 San BernardinoBear Valley, San Bernardino Mountains
CAS-BOT57726CASIsoetes howelliiDudley, W. R.s.n.1909-10-31 San MateoWoodside Valley pond
CAS-BOT57727CASIsoetes howelliiDudley, W. R.s.n.1908-06-26 San MateoW. of Seafield Pond, Coal Mine Ridge
CAS-BOT57728CASIsoetes howelliiDudley, W. R.s.n.1910-05-26 San MateoCoal Mine Ridge, near Black Mountain
CAS-BOT57729CASIsoetes howelliiDudley, W. R.s.n.1910-05-26 San MateoCoal Mine Ridge
CAS-BOT57730CASIsoetes howelliiDudley, W. R.s.n.1909-10-31 San MateoWoodside Valley Pond
CAS-BOT57731CASIsoetes howelliiMcMurphy, J.I.s.n.1906-05-19 San MateoCoal Mine Ridge
CAS-BOT57732CASIsoetes howelliiMcMurphy, Js.n.1906-07-28 San MateoCoal Mine Ridge - near Portola
CAS-BOT57733CASIsoetes howelliiAbrams, L. R.101081923-04-19 San MateoAlameda de los Pulgas back of Menlo Park
CAS-BOT57734CASIsoetes howelliide Nevers, Greg101651992-06-16 SonomaPepperwood Ranch Natural Preserve, 3450 Franz Valley Road
CAS-BOT57735CASIsoetes howelliiRubtzoff, Peter48901962-06-08 SonomaBennett Mountain Lake
CAS-BOT57736CASIsoetes howelliiRubtzoff, Peter51881963-06-22 SonomaBennett Mountain Lake
CAS-BOT57737CASIsoetes howelliiHowell, John Thomas118051934-03-27 SonomaSummit of Bennett Valley road from Glen Ellen to Santa Rosa
CAS-BOT57738CASIsoetes howelliiHowell, John Thomas130151937-06-06 SonomaSebastopol
CAS-BOT57740CASIsoetes howelliiPollard, Henry M.s.n.1959-05-11 VenturaMirror Lake, Ojai Valley
CAS-BOT57741CASIsoetes howelliiPollard, Henry M.s.n.1952-06-28 VenturaMirror Lake, Ojai Valley
CAS-BOT57742CASIsoetes howelliiPollard, Henry M.s.n.1947-03-16 VenturaMirror Lake
CAS-BOT57743CASIsoetes howelliiPollard, Henry M.s.n.1947-04-25 VenturaMirror Lake
CAS-BOT57744CASIsoetes howelliiPollard, Henry M.s.n.1947-04-07 VenturaMirror Lake
CAS-BOT69901CASIsoetes howelliiAhart, Lowell20891980-04-19 ButtePeter Ahart Ranch, Honcut.
CAS-BOT69902CASIsoetes howelliiAhart, Lowell59571988-04-06 ButteE. of North Honcut Creek, on the Joie Osgood Ranch, about 1.5 mi. n. and 3 mi. e. of Honcut, about 12 mi. se. of Oroville.
CAS-BOT69903CASIsoetes howelliiAhart, Lowell40311983-06-06 ButtePeter Ahart Ranch, about 2 mi. n. and 1-4 mi. e. of Honcut.
CAS-BOT69904CASIsoetes howelliiEastwood, Alice; Howell, John Thomas57711938-05-18 LakeNear Adams Springs.
CAS-BOT69905CASIsoetes howelliiEastwood, Alice; Howell, John Thomas56001938-05-16 Lake10 mi. n. of Lower Lake.
CAS-BOT69907CASIsoetes howelliiSmith, Doreens.n.1994-04-01 MarinHidden Lake, Mt. Burdell.
CAS-BOT69908CASIsoetes howelliiBest, Catherine; Wells, Mary P.s.n.1983-07-14 MarinHidden Lake, Mt. Burdell.
CAS-BOT69909CASIsoetes howelliiParks, H. E.s.n.1925-09-18 MarinLake Lagunitas.
CAS-BOT69910CASIsoetes howelliiParks, H. E.s.n.1925-09-18 MarinLake Lagunitas.
CAS-BOT69911CASIsoetes howelliiParks, H. E.s.n.1925-09-18 MarinLake Lagunitas.
CAS-BOT69912CASIsoetes howelliiParks, H. E.s.n.1925-09-18 MarinLake Lagunitas.
CAS-BOT69913CASIsoetes howelliiHowell, John Thomas232041947-05-25 MarinWillow Meadow, Mt. Tamalpais.
CAS-BOT69914CASIsoetes howelliiHowell, John Thomas163601941-07-06 MarinHidden lake, Mt. Tamalpais.
CAS-BOT69915CASIsoetes howelliiHowell, John Thomas21871926-08-15 MarinStrand of Lake Lagunitas.
CAS-BOT69916CASIsoetes howelliiBrandegees.n.1870-06-27 MarinOlema.
CAS-BOT69926CASIsoetes howelliiClausen, J.15831937-07-30 TuolumneMather.
CAS-BOT69927CASIsoetes howelliiMahurin, Carl251937-07-30 TuolumneMather, w. of Park line.
CAS-BOT69928CASIsoetes howelliiHowell, John Thomas129611937-05-20 San Benito12 mi. s. of Paicenes.
CAS-BOT69929CASIsoetes howelliiEastwood, Alice; Howell, John Thomas54571938-05-05 Madera5 mi. from Raymond on road to Coarse Gold.
CAS-BOT69930CASIsoetes howelliiEastwood, Alice; Howell, John Thomas18451934-04-21 Tehama5 mi. s. of Cottonwood.
CAS-BOT69931CASIsoetes howelliiEastwood, Alice; Howell, John Thomas4944A1937-06-25 TrinityPreacher Meadow.
CAS-BOT69932CASIsoetes howelliiHowell, John Thomas; Barneby, R. C.295271954-05-13 AmadorPlymouth.
CAS-BOT69933CASIsoetes howelliiNobs, Malcom A.; Smith, S. Galen13861949-08-18 PlumasLast Chance Marshes at n. end of Lake Almanor, just s. of Chester.
CAS-BOT69934CASIsoetes howelliiHardham, Clare B.19441957-05-12 San Luis ObispoAround edges of Green′s Lake.
CAS-BOT69935CASIsoetes howelliiHardham, Clare B.19431957-05-12 San Luis ObispoNear Green′s Lake.
CAS-BOT69936CASIsoetes howelliiTracy, Joseph P.87461930-06-15 HumboldtLarrabee Creek, near Bosworth′s.
CAS-BOT69937CASIsoetes howelliiTracy, Joseph P.87461930-06-15 HumboldtLarrabee Creek, near Bosworth′s.
CAS-BOT69938CASIsoetes howelliiHoover, R. F.111271968-05-28 ShastaClough Creek at Old Alturas Road.
CAS-BOT69939CASIsoetes howelliiDudley, W. R.s.n.1901-04-04 MontereyNear Upper Bennett Cr.
CAS-BOT69940CASIsoetes howelliiSharsmith, Helen K.36691936-05-21 Santa ClaraEdge of sag pond, southern end of Mount Day Ridge, Inner S. Coast Ranges, Mount Hamilton Range.
CAS-BOT69941CASIsoetes howelliiGillespie, Doris Kildale93591930-05-14 Tehama10 mi. e. of Red Bluff on Susanville Road.
CAS-BOT69942CASIsoetes howelliiRaven, Peter H.127571958-04-30 San Diego5 mi. e. of Torrey Pines on road to Miramar.
CAS-BOT69943CASIsoetes howelliiThorne, Robert F.; Lathrop, Earl379301969-05-12 RiversideSanta Rosa Plateau: large vernal marsh on s. end of Mesa de Colorado, Rancho California.
CAS-BOT69944CASIsoetes howelliiThorne, Robert F.; Lathrop, Earl; Munz, P.375681968-05-08 RiversideSanta Rosa Plateau: On Mesa de Colorado, Rancho California.
CAS-BOT69945CASIsoetes howelliiHardham, Clare B.18911957-05-01 MontereyHog Canyon, about 19 mi. ne. of San Miguel.
CAS-BOT69946CASIsoetes howelliiCopeland, E. B.32811903-05-30 ButteChico.
CAS-BOT69947CASIsoetes howelliiCopeland, E. B.32811903-05-30 ButteChico.
CAS-BOT69948CASIsoetes howelliiAhart, Lowells.n.1974-05-30 ButtePeter Ahart Ranch, Honcut.
CAS-BOT69949CASIsoetes howelliiAhart, Lowells.n.1975-04-07 ButtePeter Ahart Ranch, Honcut.
CAS-BOT69950CASIsoetes howelliiAhart, Lowells.n.1975-06-20 ButtePeter Ahart Ranch, about two mi. n. of Honcut.
CAS-BOT69974CASIsoetes howelliiAhart, Lowell48901985-05-05 SutterNear the first gate to the Dean Ranch, about 1-4 mi. n. of Mallott Road, about 2 mi. ne. of Sutter, Sutter Buttes.
CAS-BOT69975CASIsoetes howelliiAhart, Lowell52491986-05-04 SutterNear the first gate to the Dean Ranch, about 1-2 mi. n. of the intersection of Mallott Road and Alf Road, about 2 mi. ne. of Sutter, Sutter Buttes.
CDA0011711CDAIsoetes howelliiG.F. Hrusa83441991-04-22 SacramentoNimbus Dam overlook. Between Hazel Ave. and Lake Natoma. Natoma Unit-Folsom Lake State Rec. Area.
CDA0042452CDAIsoetes howelliiT.C. Fuller47931958-04-15 ButteHighway 99E, 10 miles northwest of Chico.
CDA0052268CDAIsoetes howelliiPaul Reisentzs.n.1979-04-22 VenturaMirror Lake, 1-2 mi S of intersection of Hwy 150 and Hwy 33, 3 mi SW of Ojai, 12 N of Ventura. Elev 625 ft.
CHSC111157CHSCIsoetes howelliiLowell Ahart181512012-06-02 TehamaIn a small pond or vernal pool, on the east side of Long Road, about 6.7 miles northeast of Dales and State Highway 36, northeast of Red Bluff. T2 N R0 W S07
CHSC112440CHSCIsoetes howelliiLowell Ahart187032013-05-22 ButteAbout 1-2 mile southeast of the Honcut Cemetery, about 3 1-4 miles (air) northeast of Honcut. T1 N R04E S1 W1-4
CHSC117402CHSCIsoetes howelliiLowell Ahart208812016-05-30 ButtePeter Ahart Ranch, about 1 1-2 miles north and 1 1-8 miles east of Honcut, about 12 miles (air) southeast of Oroville. T1 N R04E S0 W1-4
CHSC117650CHSCIsoetes howelliiLowell Ahart213202016-08-30 PlumasAbout 100 yards west of the Pacific Crest Trail on Bunker Hill Ridge, about 1 1-2 miles (air) southeast of Pilot Peak.
CHSC24424CHSCIsoetes howelliiLowell Ahart1976-10-01 SierraAlong Bunker Hill Ridge, 1 1-4 mi nw of Mt. Etna.
CHSC28828CHSCIsoetes howelliiJ. D. Jokerst4201979-05-18 ButteTop of North Table Mountain, ca 1.0 mi n of Cherokee Rd. T2 N R04E S08 S1-2 center
CHSC29767CHSCIsoetes howelliiM. S. Taylor27381980-05-24 ButtePeter Ahart Ranch, Honcut.
CHSC31520CHSCIsoetes howelliiL. Ahart16621978-04-21 ButtePeter Ahart Ranch, Honcut.
CHSC32078CHSCIsoetes howelliiL. Ahart12101976-09-28 SierraCa. 1 1-4 mi nw of Mt. Etna, ca. 10 mi e of La Porte.
CHSC32344CHSCIsoetes howelliiJames Jokerst6531980-05-10 MendocinoNear Howard Lake. USGS Quadrangle: Buck Rock
CHSC39547CHSCIsoetes howelliiLowell Ahart40311983-06-06 ButtePeter Ahart Ranch, about 2 miles north and 1-4 mile east of Honcut.
CHSC40400CHSCIsoetes howelliiLowell Ahart48901985-05-05 SutterNear the first gate to the Dean Ranch, about 1-4 mile north of Mallott Road, about 2 miles north-east of Sutter, Sutter Buttes.
CHSC4067CHSCIsoetes howelliiJ. Wheeler121967-04-23 TehamaOn the W side of Paskenta Rd. about 0.2 mile south of the intersection of Paskenta Rd. and Live Oak Rd.
CHSC40819CHSCIsoetes howelliiPauleen Broyles6411982-05-21 TehamaCa 30 meters s of Lassen Road in w pasture. The Nature Conservancy Vina Plains Preserve. T2 N R0 W S29 NW1-4
CHSC41439CHSCIsoetes howelliiLowell Ahart52491986-05-04 SutterNear the first gate to the Dean Ranch, about 1-2 mile north of the intersection of Mallott Road and Alf Road, about 2 miles north-east of Sutter, Sutter Buttes.
CHSC44462CHSCIsoetes howelliiLowell Ahart59571988-04-06 ButteEast of North Honcut Creek, on the Joie Osgood Ranch, about 1 1-2 miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville.
CHSC44627CHSCIsoetes howelliiVernon Oswald10931984-03-09 TehamaOld Calif. Hwy 9 W at Sour Grass Creek 2.0 mi n of the Tehama-Glenn County line. T2 N R03W S22 SW1-4 corner
CHSC45022CHSCIsoetes howelliiPauleen Broyles11051988-04-06 TehamaOn Singer Creek Ditch in Lassen Pasture. The Nature Conservancy Vina Plains Preserve. T2 N R0 W S27
CHSC46178CHSCIsoetes howelliiLowell Ahart7461975-04-07 ButtePeter Ahart Ranch, about 1 1-2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville.
CHSC46179CHSCIsoetes howelliiLowell Ahart7541975-05-11 ButtePeter Ahart Ranch, about 1 1-2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville.
CHSC46279CHSCIsoetes howelliiVernon H. Oswald37891989-05-30 ButteSheep Canon the w side of the n end of Cana-Pine Creek Rd. T2 N R0 W S05 NE1-4
CHSC53991CHSCIsoetes howelliiVernon H. Oswald45711991-05-09 TehamaPaynes Creek Recreation Area located ca. 1.5 mi northeast of the Bend Bridge over the Sacramento River, ca. 6.5 miles north-northeast of Red Bluff. T2 N R0 W S22 SW1-4 of NW1-4
CHSC57790CHSCIsoetes howelliiVernon H. Oswald49081992-04-21 TehamaHogsback Rd. (Belle Mill Rd. or Forest Rd. 2 N24) near Mud Spring, 9.7 mi (odometer) E of Hwy. 99, ca. 11 mi (air) E of Red Bluff. T28N R0 W S06
CHSC57791CHSCIsoetes howelliiVernon H. Oswald49211992-04-21 TehamaFinley Lake on Hogsback Rd. (Forest Rd. 2 N24), ca. 5.5 mi (air) SE of Paynes Creek. T28N R01E S2 W1-4 of NW1-4
CHSC59069CHSCIsoetes howelliiVernon H. Oswald51711992-08-20 SierraDuck Soup Pond, 1.6 mi (air) SSE of Pilot Pk., ca. 9 mi (air) Ne of La Porte. T2 N R10E S06 SE1-4 corner
CHSC59161CHSCIsoetes howelliiVernon H. Oswald52151992-09-15 LassenIsland Lake located N of Bonte Pk. And ca. 1.5 W of Juniper Lake campgrounds. T3 N R06E S24 NW1-4 center
CHSC60804CHSCIsoetes howelliiVernon H. Oswald56221993-06-28 LassenN of Hwy. 44 along Rd. 3 N47 at the NE end of Little Harvey Valley, between Champs Flat and Harvey Valley, E of Poison Lake. T32N R09E S05 SE1-4 of NE1-4
CHSC64591CHSCIsoetes howelliiVernon H. Oswald66711995-04-17 TehamaCascade Range Foothills. Dales Lake Ecological Reserve. W side of Manton Rd. (A6) ca. 1.5 mi n of Dales Station on Hwy. 36, ca. 14 mi ne of Red Bluff. T2 N R0 W S26 SE1-4 of NW1-4
CHSC64934CHSCIsoetes howelliiVernon H. Oswald70191995-07-12 TehamaW of Red Bluff and S of Platina on Forest Route 45 (Tedoc Mtn. Rd.), 6.3 mi S of Hwy. 36. T2 N R0 W S09 SE1-4
CHSC65908CHSCIsoetes howelliiVernon H. Oswald7377.11996-04-15 TehamaThomes Creek Ecological Reserve. CDFG parcel on the S side of Gyle Rd. NW of Corning, northwest side of Sacramento Valley. T2 N R0 W S30 NW1-4 of SE1-4
CHSC65940CHSCIsoetes howelliiVernon H. Oswald74121996-04-23 TehamaCascade Range Foothills. Hog Lake Plateau. BLM parcel along Hwy. 3 NE of Red Bluff. T28N R0 W S17 SW1-4 of NW1-4
CHSC66711CHSCIsoetes howelliiVernon H. Oswald81111996-08-01 LassenMountain Meadows Reservoir SW of Westwood. NE of Indian Ole Dam. T2 N R08E S13 SE1-4
CHSC69407CHSCIsoetes howelliiLowell Ahart78741997-08-28 SierraWest of the Pacific Crest Trail and Bunker Hill Ridge, about one mile west of the Bunker Hill Mine, about one mile southeast of Pilot Peak. T2 N R10E S1 W1-4
CHSC71271CHSCIsoetes howelliiLowell Ahart80231998-07-01 ButteAbout 1-4 miles north of the lone oak tree, about 1-2 mile north of the cow chute along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. T2 N R04E S08 SE1-4
CHSC79088CHSCIsoetes howelliiB. Castro10612000-04-05 TehamaVicinity of Orland, among hummocky rolling hills of grazed annual grassland adjacent to Rice Creek. T2 N R0 W S USGS Quadrangle: Black Butte Dam 1:24,000
CHSC79934CHSCIsoetes howelliiB. Castro11722000-05-11 TehamaVicinity of Orland and Black Butte Lake. T2 N R0 W S USGS Quadrangle: Kirkwood 1:24000
CHSC81194CHSCIsoetes howelliiJ. Trizzino582001-04-25 ButteOro-Chico Highway, 0.25 mi west of Neal Road, wet ditch on north side of road. T2 N R02E S section not surveyed USGS Quadrangle: Hamlin Canon 1:24,000
CHSC81195CHSCIsoetes howelliiJ. Trizzino312001-04-17 TehamaHog Lake Plateau off Highway 36. T2 N R0 W S18 NW1-4 of SW1-4 USGS Quadrangle: Tuscan Buttes 1:24,000
CHSC82704CHSCIsoetes howelliiLowell Ahart99172002-07-22 PlacerOn the south side of the small natural lake, on the east side of the paved road to Lake Valley Reservoir, about 1-4 mile east of Yuba Gap and Highway 80. T1 N R12E S27 NE1-4
CHSC84250CHSCIsoetes howelliiLowell Ahart102332003-05-28 ButteOn the bottom of Hendricks ditch, about 1 3-4 miles west of the iron gate and fence, west of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. T2 N R03E S1 W1-4
CHSC84546CHSCIsoetes howelliiJohn Dittes2003-282003-05-25 PlacerSacramento Valley; approximately 3.3 air-miles south of Lincoln, 0.5 air-miles due east of intersection of State Highway 65 and 12-Bridges Exit. In bed of vernal pool. T1 N R0 W S34 SW1-4 USGS Quadrangle: Roseville 1:24,000
CHSC87384CHSCIsoetes howelliiLowell Ahart107902004-04-29 TehamaIn Dead Rabbit Lake, east of the Nomalaki Trail, about 3-4 mile northwest of Bowers Creek, about 1 1-2 miles northwest of Forest Road 2 N69 (Mud Flat Road), about 7 miles (air) southwest of Paskenta. T23N R0 W S17 SW1-4
CHSC92169CHSCIsoetes howelliiLowell Ahart123722005-09-19 PlumasIn Taylor Lake, on the east side of Taylor Lake, about 6 miles (air) southwest of Antelope Lake. T2 N R11E S3 W1-4
CHSC94929CHSCIsoetes howelliiW. Gray342005-03-16 ButteWest of Wildwood park, Chico. USGS Quadrangle: Richardson Springs
CSLA020120CSLAIsoetes howelliiJames Henrickson32571969-05-16 Riverside6 miles W. of Murrieta on Colorado Mesa of Santa Rosa Plateau near large vernal pool
DAV107993DAVIsoetes howelliiJaney Veneman151974-06-01 SacramentoSacramento County: Sunset Ace. Across from Phoenix Field, 0.7 miles east of junction with Hazel Ave.
DAV119448DAVIsoetes howelliiThomas H. Whitlows.n.1976-04-01 SacramentoSacramento County: Phoenix Park, east of Fair Oaks.
DAV127856DAVIsoetes howelliiRobert E. Preston7461995-04-01 SacramentoSacramento County: Vernal Pool Preserve, ca. 0.8 mi SW of int. Hwy 16 and Sloughhouse Road.
DAV158462DAVIsoetes howelliiCharles H. Pinney121975-04-08 SacramentoSacramento County: Fair Oaks, Phoenix Airfield. 1-4 mi E of Hazel Avenue on Sunset Road.
DAV158597DAVIsoetes howelliiVernal Pool Team 20022762002-04-17 TehamaTehama County: Thomes Creek Ecological Reserve. Approximately 6 miles NW of the town of Corning. Located 200 meters N of a intermittent drainage. Pool # THO003. UTMs: 10S0564312; 4427009.
DAV161293DAVIsoetes howelliiVernal Pool Team 20023322002-05-08 MendocinoMendocino County: Ridgewood Ranch site. Pool # RID002. UTMs 10S0474017; 4353766.
DAV161363DAVIsoetes howelliiVernal Pool Team 20023012002-05-02 SacramentoSacramento County: Phoenix Field Park, the city of Sacramento. 0.5 miles E of Hazel Avenue along Sunset Blvd. Pool #PHO002. UTMs 10S0655082; 4279651.
DAV180221DAVIsoetes howelliiAyzik Solomeshchs. n.2005-06-03 FresnoFresno County: California Department of Fish and Game Big Table Mountain Ecological Reserve. 10 miles NE of the town of Friant.
DAV180367DAVIsoetes howelliiD. PeBenito, J.Baty, C. Leonzo112008-03-09 SacramentoSacramento County: Cosumnes River Preserve. Howard Ranch North: Block6, Plot4, Pool 2.
DAV180368DAVIsoetes howelliiD. PeBenito, J.Baty, C. Leonzo11-a2008-04-15 SacramentoSacramento County: Cosumnes River Preserve. Howard Ranch North: Block6, Plot4, Pool 2.
DAV181668DAVIsoetes howelliiEllen Dean26652005-06-11 SacramentoCalifornia: Sacramento County, Deer Creek Hills Reserve. South side of Latrobe Rd., along dirt road which begins at gate located 0.6 road miles east of Corral Gate entrance. We traveled 0.5 road miles south of Latrobe Rd, before beginning to walk south.
DAV182700DAVIsoetes howelliiCNPS SN Foothill TeamSNFN-0297a2006-04-26 MariposaMariposa County: Maggie Williams property, private .
DAV182701DAVIsoetes howelliiCNPS SN Foothill TeamSNFN-0436d2006-05-04 TuolumneTuolumne County: Table Mountain on Minna Grazzettii′s property (access through Pat Stone). At top of driveway, walk SW to pool just NW of light blue storage shed.
DAV188532DAVIsoetes howelliiAyzik Solomeshchs.n.2009-05-12 SonomaSonoma County: Sonoma Regional Park.
DAV188818DAVIsoetes howelliiAyzik Solomeshchs.n.2009-05-12 SonomaSonoma County: Along Bennett Valley Road (between Santa Rosa and Glen Ellen).
DAV189080DAVIsoetes howelliiAyzik Solomeshchs.n.2004-06-13 LakeLake County: Southern slope of Goat Mtn. Vicinity of Root Glades, N of Wyman Creek.
DAV189112DAVIsoetes howelliiAyzik Solomeshchs.n.2004-06-12 LakeLake County: Southern slope of Goat Mtn. Vicinity of Root Glades, N of Wyman Creek.
DAV189441DAVIsoetes howelliiAyzik Solomeshchs.n.2009-05-06 MontereyMonterey County: Fort Ord, Trail 17.
DAV189608DAVIsoetes howelliiAyzik Solomeshchs.n.2009-05-05 MontereyMonterey County: Fort Ord, Machine Gun Flats.
DAV189794DAVIsoetes howelliiAyzik Solomeshchs.n.2009-04-08 MontereyMonterey County: Fort Ord, Butterfly Valley.
DAV189795DAVIsoetes howelliiAyzik Solomeshchs.n.2009-04-08 MontereyMonterey County: Fort Ord, Butterfly Valley.
DAV189889DAVIsoetes howelliiAyzik Solomeshchs.n.2009-06-04 MercedMerced County: Flying M Ranch, vernal pools.
DAV189900DAVIsoetes howelliiAyzik Solomeshchs.n.2009-06-17 SacramentoSacramento County: Kiefer Landfill, vernal pools.
DAV189926DAVIsoetes howelliiAyzik Solomeshchs.n.2009-05-08 MontereyMonterey County: Fort Ord. Mary′s Valley.
DAV199971DAVIsoetes howelliiAyzik Solomeshchs.n.2009-04-27 San DiegoSan Diego County: Cleveland National Forest. Laguna Campground, Mount Laguna. About 14 miles SE of San Diego County Road S1 (also called Sunrise Hwy) from intersection with Hwy 79.
DAV199972DAVIsoetes howelliiAyzik Solomeshchs.n.2009-04-27 San DiegoSan Diego County: Cleveland National Forest. Laguna Campground, Mount Laguna. About 14 miles SE of San Diego County Road S1 (also called Sunrise Hwy) from intersection with Hwy 79.
DAV199980DAVIsoetes howelliiAyzik Solomeshchs.n.2009-04-27 San DiegoSan Diego County: Cleveland National Forest. Laguna Campground, Mount Laguna. About 14 miles SE of San Diego County Road S1 (also called Sunrise Hwy) from intersection with Hwy 79.
DAV205460DAVIsoetes howelliiEllen Dean80792014-04-29 NapaNapa County: Knoxville public lands. California Department of Fish and Wildlife property. Headwaters of Nevada Creek. Most northwestern part of property.
DAV208592DAVIsoetes howelliiAyzik Solomeshchs.n.2009-05-11 SonomaSonoma County: Santa Rosa Plain. NW of City of Santa Rosa. Maggi Property located SW of the intersection of Fulton and River Rds. Sampling pool #1.
DAV209297DAVIsoetes howelliiAyzik Solomescshs.n.2009-05-14 SonomaSonoma County, 2.3 km. southeast of city of Sebastopol. Santa Rosa Plain, Cooper Site, pool 1. Elevation estimated in Google Earth by label maker.
DAV212220DAVIsoetes howelliiEllen Dean87692015-05-23 NapaNapa County: Knoxville Wildlife Area. California Dept. of Fish and Wildlife public lands. Headwaters of Nevada Creek.NE corner of land parcel.
DAV230450DAVIsoetes howelliiHannah Kang82019-04-14 PlacerPlacer County: Southeast of the intersection of Pleasant Grove Boulevard with Fiddyment Road, under high voltage steel tower electrical transmission line corridor.
DAV30355DAVIsoetes howelliiMalcolm A. Nobs13861949-08-18 PlumasPlumas County: Last Chance Marshes at north end of Lake Almanor, just south of Chester.
DAV38089DAVIsoetes howelliiRimo Bacigalupi56931956-06-01 LakeLake County: At eastern end of Dry Lake, 1.4 miles west of Lower Lake.
DAV38098DAVIsoetes howelliiRimo Bacigalupi70361959-04-23 ShastaShasta County: Along U.S. Highway 299, Salmon Creek, about 2 miles west of Bella Vista.
DAV55034DAVIsoetes howelliiW. R. Powell16921970-03-26 ButteButte County: Just off of La Porte Road, 1.8 miles northeast of Bangor and ca. 15 miles southeast of Oroville.
DAV61247DAVIsoetes howelliiW. R. Russells.n.1972-05-25 NapaNapa County: Just west of State Highway 29 and south of Calistoga.
DAV88533DAVIsoetes howelliiLeslie Coburn1211975-05-31 CalaverasCalaveras County: Ca. 9.8 miles east of Westpoint, Winton Road.
DAV98750DAVIsoetes howelliiH. van der Werff44621982-04-16 San DiegoSan Diego County: Corte Madera Ranch. Pine Valley.
FSC0000092FSCIsoetes howelliiJohn H. Weiler59751959-05-09 LakeThe north edge of the villiage of Loch Lomond.
FSC0000093FSCIsoetes howelliiJohn Weiler631111963-05-17 FresnoJust south of Jose Basin and off a logging road from Jose Basin to Alder Springs. Site near the first bridge over the creek south of Jose Basin.
FSC0000094FSCIsoetes howelliiGilbert L. Schroeter63201963-03-10 FresnoFound in irrigation ditch on Friant Road 1 1-2 miles north of Pinedale where curve warning sign is located. Elevation about 250 feet.
FSC0000096FSCIsoetes howelliiChas. H. Quibell21561953-06-02 FresnoB3 Ditch where it siphons successively under Shaw Ave., Santa Fe R.R. and Jeanne Ave., n.w. of Fresno. Not bottom cleaned this yr.
FSC0000097FSCIsoetes howelliiJohn Weiler63451963-03-30 FresnoAt the side of Watts Valley Road 1.3 miles east of the junction with Pittman Hill Road.
GH00309036GHIsoetes howelliiL. C. Wheeler37571935-08-03 ModocRock Lake, Pine Creek, Warner Mts. S48, T48N, R15E
GH00309037GHIsoetes howelliiJ. P. Tracy138411935-05-25 HumboldtFort Seward
GH02074812GHIsoetes howellii;lsqb;data not captured;rsqb;1932-05-01 Santa Clara[data not captured]
GH02074813GHIsoetes howellii;lsqb;data not captured;rsqb;1940-04-27 Riverside[data not captured]
GH02074814GHIsoetes howellii;lsqb;data not captured;rsqb;1918-09-01 Lake[data not captured]
GH02074815GHIsoetes howellii;lsqb;data not captured;rsqb;1941-07-29 San Diego[data not captured]
GH02074816GHIsoetes howellii;lsqb;data not captured;rsqb;1922-03-17 Marin[data not captured]
GH02074817GHIsoetes howellii;lsqb;data not captured;rsqb;1937-08-26 Mariposa[data not captured]
GH02074818GHIsoetes howellii;lsqb;data not captured;rsqb;1910-08-13 Tehama[data not captured]
GH02074819GHIsoetes howellii;lsqb;data not captured;rsqb;1913-08-17 San Benito[data not captured]
GH02074820GHIsoetes howellii;lsqb;data not captured;rsqb;1916-07-07 Sonoma[data not captured]
GH02074821GHIsoetes howellii;lsqb;data not captured;rsqb;1903-05-18 Modoc[data not captured]
GH02074822GHIsoetes howellii;lsqb;data not captured;rsqb;1903-05-08 Modoc[data not captured]
GH02074823GHIsoetes howellii;lsqb;data not captured;rsqb;2006-08-25 Siskiyou[data not captured]
GH02074824GHIsoetes howellii;lsqb;data not captured;rsqb;2005-01-02 Tehama[data not captured]
GH02074825GHIsoetes howellii;lsqb;data not captured;rsqb;1941-06-29 Modoc[data not captured]
GH02074826GHIsoetes howellii;lsqb;data not captured;rsqb;1913-04-01 Humboldt[data not captured]
GH02074827GHIsoetes howellii;lsqb;data not captured;rsqb;1933-08-08 Del Norte[data not captured]
GH02074832GHIsoetes howellii;lsqb;data not captured;rsqb;1938-08-18 Madera[data not captured]
GH02074833GHIsoetes howellii;lsqb;data not captured;rsqb;1875-01-01 Marin[data not captured]
GH02074834GHIsoetes howellii;lsqb;data not captured;rsqb;1952-06-07 Riverside[data not captured]
GH02074835GHIsoetes howellii;lsqb;data not captured;rsqb;1906-07-31 Lake[data not captured]
GH02074836GHIsoetes howellii;lsqb;data not captured;rsqb;1944-07-01 Marin[data not captured]
GH02074837GHIsoetes howellii;lsqb;data not captured;rsqb;1924-06-22 Del Norte[data not captured]
GH02074838GHIsoetes howellii;lsqb;data not captured;rsqb;1884-08-01 Butte[data not captured]
GH02074839GHIsoetes howellii;lsqb;data not captured;rsqb;1949-04-26 Unknown[data not captured]
GH02074840GHIsoetes howellii;lsqb;data not captured;rsqb;1919-07-01 San Bernardino[data not captured]
GH02074841GHIsoetes howellii;lsqb;data not captured;rsqb;1938-09-01 Marin[data not captured]
GH02074842GHIsoetes howellii;lsqb;data not captured;rsqb;1908-06-08 Santa Clara[data not captured]
HSC100969HSCIsoetes howelliiPeter Warner2082011-05-27 SonomaCresta Ranch, Cresta Rd. (off Mark West Springs Rd. at Mark West Lodge), ˜ 1.6 km E of this junction on N edge of road.
HSC84735HSCIsoetes howelliiGladys L. Smith58211981-09-04 MendocinoS end of Leonard Lake, upper Reeves Canon
HSC894HSCIsoetes howelliiH.E. Parks112521935-06-02 Del NorteVicinity of Darlingtonia Canon the Smith River, 2 mi. E of Gasquet
HSC895HSCIsoetes howelliiH.E. Parks113251936-06-13 Del NorteSmith River about 2 mi. E of Gasquet
HSC896HSCIsoetes howelliiH.E. Parks241371938-06-01 Del NorteSmith River
IRVC15233IRVCIsoetes howelliiGordon A. Marshs.n.1977-05-25 RiversideMesa de Burro, Santa Rosa Plateau
IRVC17941IRVCIsoetes howelliiGordon A. Marshs.n.1980-05-18 RiversideSanta Rosa Plateau, pool 1.
IRVC24794IRVCIsoetes howelliiPaul Reisentzs.n.1979-04-22 VenturaMirror Lake, 1-2 mile south of intersection of Hwy 150 and Hwy 33, 3 miles SW of Ojai, 12 miles N of Ventura.
JEPS103966UCJEPSIsoetes howelliiJake Ruygt37081996-05-19 NapaWest of Barnett Road near Burton Creek, (Peju Pr)Pope Valley.
JEPS104157UCJEPSIsoetes howelliiLowell Ahart102332003-05-28 ButteOn the bottom of Hendricks ditch, ca 1 3-4 mi w of the iron gate and fence, w of Cherokee Rd, North Table Mountain, ca 7 mi (air) n of Oroville.
JEPS104917UCJEPSIsoetes howelliiDean W. Taylor152081995-07-02 ShastaGoose Valley Road about 1.5 miles North of Highway 299 junction, adjacent to railroad tracks
JEPS106165UCJEPSIsoetes howelliiLowell Ahart107902004-04-29 TehamaIn Dead Rabbit Lake, east of the Nomalaki Trail, about 3-4 mile northwest of Bowers Creek, about 1 1-2 miles northwest of Forest Road 2 N69 (Mud Flat Road), about 7 miles (air) southwest of Paskenta
JEPS107682UCJEPSIsoetes howelliiLowell Ahart, John Dittes123722005-09-19 PlumasIn Taylor Lake, on the east side of Taylor Lake, about 6 miles (air) southwest of Antelope Lake
JEPS116562UCJEPSIsoetes howelliiJake Ruygt48012005-04-30 NapaBig Ranch Road at El Centro Ave. Napa 7.5 Quad.
JEPS116563UCJEPSIsoetes howelliiJake Ruygt29621992-05-15 NapaWest of vernal pool meadow, Wild Horse Valley Ranch. Mount George 7.5 Quad.
JEPS120930UCJEPSIsoetes howelliiLowell Ahart187032013-05-22 ButteAbout 2.5 miles SE of the Honcut Cemetery, about 3.25 air miles NE of Honcut.
JEPS127197UCJEPSIsoetes howelliiLowell Ahart208812016-05-30 ButtePeter Ahart Ranch, about 1 1-2 miles north and 1 1-8 miles east of Honcut, about 12 miles (air) southeast of Oroville.
JEPS127220UCJEPSIsoetes howelliiLowell Ahart213202016-08-30 PlumasAbout 100 yards west of the Pacific Crest Trail on Bunker Hill Ridge, about 1 1-2 miles (air) southeast of Pilot Peak.
JEPS129168UCJEPSIsoetes howelliiJake Ruygt6086e2015-05-02 NapaWest of Buck Mountain near Nevada. Knoxville 7.5 Quad.
JEPS18119UCJEPSIsoetes howelliiRimo Bacigalupi, G. T. Robbins56931956-06-01 Lake1.4 mi. w. Lower Lake (e. end of Dry Lake)
JEPS20537UCJEPSIsoetes howelliiRimo Bacigalupi, S. Galen Smith, George Bacigalupi, Jr.59711957-06-27 Siskiyou2 1-2 mi. n.w. Weed (s. tip of Shasta Valley, near headwaters of Shasta River); Shasta Valley
JEPS25419UCJEPSIsoetes howelliiRimo Bacigalupi, G. T. Robbins70361959-04-23 Shastaca. 2 mi. w. Bella Vista (along U.S. Hwy. 299, in drainage of Salmon Creek)
JEPS45467UCJEPSIsoetes howelliiPerry Allen1961-12-23 Stanislausvicinity of La Grange (shore of Dawson Lake just below steep hill on e. side); Dawson Lake
JEPS52323UCJEPSIsoetes howelliiWayne Roderick1965-04-01 Sonomae. Cotati (on Rivers Ranch, Sonoma Mts.); Sonoma Mts., Rivers Ranch
JEPS60154UCJEPSIsoetes howelliiR. F. Hoover11431936-05-20 SutterPleasant Grove
JEPS67913UCJEPSIsoetes howelliiL. R. Heckard, J. J. Thomas28961972-04-16 San Mateosw of Upper Crystal Springs Reservoir (ca 1 1-2 mi s of Pulgas Water Temple, along Old Canada Rd (private))
JEPS79455UCJEPSIsoetes howelliiEdward Lee, W. Joseph15831935-07-18 MarinMt. Tamalpais, Hidden Lake
JEPS79456UCJEPSIsoetes howelliiEdward Lee, Annetta Carter22731936-07-04 Santa Claraon ridge from Mt. Day to junction of Smith and Santa Isabela creeks (Mt. Hamilton Range); Mt. Hamilton Range
JEPS79458UCJEPSIsoetes howelliiEdward Lee, A. Carter, J., N. Ewan20301936-05-09 Sutterca. 5 mi. w. Live Oak (beginning of foothills on n.e. side of < Marrysville > Buttes)
JEPS79612UCJEPSIsoetes howelliiEdward Lee1974-05-11 SonomaLaguna R.R. bridge Sebastopol
JEPS88062UCJEPSIsoetes howelliiVernon H. Oswald, Lowell Ahart74121996-04-23 Tehamane of Red Bluff (BLM parcel along Hwy 36, sw end of Hog Lake); Cascade Range Foothills, Hog Lake Plateau
JEPS88063UCJEPSIsoetes howelliiVernon H. Oswald, Lowell Ahart7377.11996-04-15 Tehamanw Corning (CDFG parcel on s side of Gyle Rd, ca 0.6 mi e of lane); Sacramento Valley, Thomes Creek Ecological Reserve
JEPS89842UCJEPSIsoetes howelliiDean W. Taylor116861990-05-09 Tehamaca. 300 meters n. of creek along right-of-way electrical transmission lines (PG & E Pit-Vaca line) Stony Creek; Sacramento Valley, Black butte Dam 7 1-2 Quad., Stony Creek
JEPS94717UCJEPSIsoetes howelliiLowell Ahart80231998-07-01 Butteabout 7 air mi n Oroville (vernal pool about 1-4 mi n of lone oak tree, about 1-2 mi n of the cow chute along Cherokke Rd.); North Table Mountain
JEPS94945UCJEPSIsoetes howelliiLowell Ahart78741997-08-28 Sierrasmall pond about 1 mi w Bunker Hill Mine (w of the Pacific Crest Trail and Bunker Hill Ridge, about 1 mi se of Pilot Peak)
JEPS97375UCJEPSIsoetes howelliiVernon H. Oswald, Lowell Ahart66711995-04-17 Tehama14 NE of Red Bluff (W side of Manton Rd (A6) ca. 1.5 mi N of Dales Station on Hwy 36); Cascade Range Foothills, Dales Lake Ecological Reserve
JEPS97379UCJEPSIsoetes howelliiVernon H. Oswald, Lowell Ahart70191995-07-12 TehamaW of Red Bluff (S of Platina; Forest Rte 45 (Tedoc Mtn Rd) 6.3 mi S of Hwy 36); High North Coast Ranges
LA213506LAIsoetes howelliiLawrence L. Kiefer5291963-05-18 VenturaOjai Valley, Mirror Lake (S of airport, junction of hgwys 150 and 399)
LOB113656LOBIsoetes howelliiT. Witham1371978-04-21 San DiegoMira Mar Naval Station, Carrol Road, just past railroad tracks
LOB113660LOBIsoetes howelliiGlen Syfert971978-04-22 San DiegoCarroll Canon Road, Mira Mar Mesa
NY02783348NYIsoetes howelliiJ. T. Howell130151937-06-06 ?  Sonoma
NY04217808NYIsoetes howelliiV. H. Oswald49211992-04-21 ?  TehamaFinley Lake on Hogsback Rd. (Forest Rd. 28N24), ca. 5.5 mi (air) SE of Paynes Creek.
NY2783355NYIsoetes howelliiJ. T. Howell129611937-05-20 ?  San Benito12 miles south of Paicines.
NY2783356NYIsoetes howelliiB. Ertter82631989-04-22 ?  MercedFlying M Ranch ca 10 air miles northeast of Merced. pool along streamlet cutting through low bluffs southeast of pools on Burns Creek
NY2783357NYIsoetes howelliiB. Ertter32881980-05-07 ?  ButtePeter Ahart Ranch ca 2.5 miles north-northeast of Honcut between Oroville and Marysville, Valley Grassland.
NY2783358NYIsoetes howelliiA. Eastwood18451934-04-21 ?  Tehama5 miles s. of Cottonwood.
NY2783362NYIsoetes howelliiR. F. Thorne449801974-07-27 ?  LakeBoggs Lake: North of Harrington Flat Road.
NY3507992NYIsoetes howelliiS. B. Parish14401882-08-01 UnknownBear Valley, San Bernardino Mts.
NY3507995NYIsoetes howelliiS. B. Parish14401882-08-01 UnknownSubmerged in shallow water, Bear Valley, San Bernardino Mts.
OBI172407OBIIsoetes howelliiLawrence L. Kiefer5291963-05-18 VenturaOjai Valley, Mirror Lake, south of airport, jnctn. of hgwys. 399 and 1 W margin of lake
OBI172411OBIIsoetes howelliiH. E. Parks241371938-06-01 Del NorteDarlingtonia, Smith River
OBI172412OBIIsoetes howelliiR. F. Hoover111271968-05-28 ShastaClough Creek at Old Alturas Road
OBI174981OBIIsoetes howelliiR. F. Hoover111271968-05-28 ShastaClough Creek at Old Alturas Road.
PGM3698PGMIsoetes howelliiYadon, Vern1998-05-02 MontereyNorthern Monterey County, Ft Ord, Henniken Flats Vernal Areas
PGM4253PGMIsoetes howelliiYadon, Vern1998-05-31 MontereySierra de Salinas, Hastings Res Carmel Valley, Ranch NW of and adj to Hastings Res
POM17786RSAIsoetes howelliiF. W. Peirson33661923-03-28 San Diegonear boulevard on mesa about 6 miles north of San Diego
POM203033RSAIsoetes howelliiJ. T. Howell118051934-03-27 SonomaSummit of Bennett Valley road from Glen Ellen to Santa Rosa
POM210005RSAIsoetes howelliiH. E. Parkss.n.1925-09-18 MarinLake Lagunitas.
POM230868RSAIsoetes howelliiF. F. Gander3806.11937-05-11 San Diego2 Miles North of Poway Junc. US 395.
POM25501RSAIsoetes howelliiAlice Eastwood115081922-07-23 MarinMt. Tamalpais, Rock Spring.
POM25514RSAIsoetes howelliiKatherine Brandegees.n.1910-05-29 MarinOlema
POM25515RSAIsoetes howelliiP. A. Munz64341922-08-05 MarinMt Tamalpais, Rock Springs.
POM258890RSAIsoetes howelliiAlice Eastwood57711938-05-18 LakeNear Adams Springs.
POM26550RSAIsoetes howelliiH. F. Copeland2921903-05-30 ButteChico.
POM28318RSAIsoetes howelliiH. H. Tracy6801918-08-01 San BernardinoSwitzers Meadows, margin of brook leading into Arrowhead Lake. San Bernardino Mountains
POM312958RSAIsoetes howelliiMalcolm A. Nobs13861949-08-18 PlumasLast Chance Marshes at north end of Lake Almanor, just south of Chester.
POM5203RSAIsoetes howelliiE. B. Copeland32811903-05-30 ButteChico.
POM9999RSAIsoetes howelliiH. H. Tracy6801918-08-01 San BernardinoSwitzers Meadows, brook leading into Little Bear Lake [Arrowhead Lake]. San Bernardino Mountains
PUA2193PUAIsoetes howelliiG.L. Clifton1974-09-07 PlumasLocal landmark: Taylor Lake. Kettle Rock Quad.
PUA38361PUAIsoetes howelliiJames Jokerst1980-05-10 MendocinoLocal landmark: Howard Lake. Buck Rock Quad.
PUA42984PUAIsoetes howelliiMaralyn Renner1980-07-24 SiskiyouLocal landmark: Lily Pad Lake. Seiad Valley Quad.
PUA46986PUAIsoetes howelliiG.L. Clifton1979-09-18 MonoLocal landmark: Glacier Canon. Mono Craters Quad.
PUA57219PUAIsoetes howelliiG.L. Clifton1983-05-26 LakeLocal landmark: High Valley Creek. The Geysers Quad.
PUA59769PUAIsoetes howelliiG.L. Clifton1984-05-10 TuolumneLocal landmark: Red Hills. Chinese Camp Quad.
PUA67068PUAIsoetes howelliiG.L. Clifton1984-06-25 SonomaLocal landmark: Caldwell Ranch. The Geysers Quad.
RSA0118713RSAIsoetes howelliiLowell Ahart187032013-05-22 ButteAbout 1-2 mile southeast of the Honcut Cemetery, about 3 1-4 miles (air) northeast of Honcut.
RSA0172792RSAIsoetes howelliiJerilyn Hirshberg26242017-04-15 San DiegoCleveland National Forest, NW of Cuyamaca Mountains, about 6 miles south of intersection of Hwy 78 & 79 in Santa Ysabel, 0.4 miles SW of large holding pond on northern edge of Eagle Peak Road at Kessler Flat. Square: L18.
RSA116773RSAIsoetes howelliiW. R. Dudleys.n.1906-07-28 San MateoCoal Mine Ridge, Black Mtn.
RSA116774RSAIsoetes howelliiW. R. Dudleys.n.1909-10-31 San MateoWoodside Valley pond.
RSA124098RSAIsoetes howelliiChas. H. Quibell31221953-08-06 Fresno9000′ Mysery L on broad bench on SE side of Dinkey Creek Canon, 200′ above Crk and below 9250′ Swede L and the 10400′ plus Three Sisters Ridge to the ESE - near headwaters of Dinkey Creek, lowest Trib N Fk Kings River.
RSA125345RSAIsoetes howelliiP. H. Raven127571958-04-30 San Diego5.0 miles east of Torrey Pines on road to Miramar.
RSA128168RSAIsoetes howelliiClare B. Hardham42281958-04-12 San Luis ObispoCambria. The Santa Lucia Mtns.
RSA128169RSAIsoetes howelliiClare B. Hardham42601959-04-19 San Luis Obispo0.7 mile W of Huero Huero Bridge, Rte 41.
RSA151818RSAIsoetes howelliiH. E. Parks241371938-06-01 Del NorteDarlingtonia, Smith River
RSA152291RSAIsoetes howelliiJoseph P. Tracy156501937-08-12 HumboldtSnow Camp.
RSA17907RSAIsoetes howelliiMary Belle Wests.n.1928-06-01 Santa ClaraBack of Stanford University.
RSA192257RSAIsoetes howelliiE. W. Lathrop62531966-05-01 Riverside3 miles W of Murrieta
RSA199007RSAIsoetes howelliiR. F. Thorne375671968-05-08 RiversideSanta Rosa Plateau: on Mesa de Colorado, Rancho California
RSA199008RSAIsoetes howelliiR. F. Thorne374201968-04-18 RiversideSanta Rosa Plateau: near roadside, Rancho California. Santa Ana Mountains
RSA199009RSAIsoetes howelliiR. F. Thorne375681968-05-08 RiversideSanta Rosa Plateau: on Mesa de Colorado, Rancho California
RSA211494RSAIsoetes howelliiWilliam J. Ferlatte2811966-08-03 SiskiyouJosephine Lake basin. Trinity Alps.
RSA227253RSAIsoetes howelliiPeter Rubtzoff51881963-06-22 SonomaBennett Mountain Lake.
RSA234045RSAIsoetes howelliiR. F. Thorne379741969-05-19 RiversideSanta Rosa Plateau: Rancho Caifornia, Mesa de Colorado
RSA234046RSAIsoetes howelliiR. F. Thorne379421969-05-12 RiversideSanta Rosa Plateau: Mesa de Colorado, Rancho California.
RSA234054RSAIsoetes howelliiR. F. Thorne379301969-05-12 RiversideSanta Rosa Plateau: Large vernal marsh on S end of Mesa de Colorado, Rancho California
RSA261555RSAIsoetes howelliiW. R. Powell16921970-03-26 ButteJust off of La Porte Road, 1.8 miles NE of Bangor and ca 15 miles SE of Oroville.
RSA268974RSAIsoetes howelliiJ. R. Reeder66751975-06-04 Tehamaca. 4 miles SW of Dales - ca. 11 miles NE of Red Bluffs.
RSA286232RSAIsoetes howelliiR. F. Thorne449801974-07-27 LakeBoggs Lake: N of Harrington Flat Road.
RSA286803RSAIsoetes howelliiR. F. Thorne446711974-05-23 RiversideSanta Ana Mountains, Santa Rosa Plateau, Rancho California: N edge of large vernal marsh, Mesa de Colorado
RSA299560RSAIsoetes howelliiEdward Lee22731936-07-04 Santa ClaraPond in hollow in ridge from Mt. Day to junction of Smith and Santa Isabela Creeks, Mt. Hamilton Range.
RSA336178RSAIsoetes howelliiR. F. Thorne519661978-05-21 RiversideSanta Rosa Plateau: Mesa de Colorado
RSA356636RSAIsoetes howelliiR. F. Thorne455421975-05-20 RiversideSanta Rosa Plateau: Rancho California, Mesa de Burro; Santa Ana Mountains
RSA357000RSAIsoetes howelliiR. F. Thorne438751973-05-23 RiversideSanta Rosa Plateau- Mesa de Colorado: stream N of mesa. Santa Ana Mountains
RSA357154RSAIsoetes howelliiRobert F. Thorne438521973-05-23 RiversideSanta Rosa Plateau: N side of Mesa de Colorado. Santa Ana Mountains
RSA430448RSAIsoetes howelliiLyman Benson65971935-05-17 LakeWest base of Mt. Konocti, Breens Lake. Middle N. Coast mtn range, Clear Lake watershed.
RSA43959RSAIsoetes howelliiHenry M. Pollards.n.1947-04-07 VenturaMirror Lake
RSA518973RSAIsoetes howelliiBarbara Ertter82631989-04-22 MercedFlying M Ranch, ca 10 air miles NE of Merced.
RSA54092RSAIsoetes howelliiJ. T. Howell229771946-09-01 El DoradoEcho Summit.
RSA545385RSAIsoetes howelliiRobert F. Thorne455421975-05-20 RiversideSanta Rosa Plateau: Rancho California, Mesa de Burro
RSA576444RSAIsoetes howelliiL. C. Wheeler28711934-07-03 SiskiyouSoda Creek, Sterling Mt. Siskiyou Mountains. (Mt. Diablo Mer.)
RSA606519RSAIsoetes howelliiJon E. Keeley79261985-04-18 RiversideMain pool near road, Mesa de Colorado, Santa Rosa Plateau. Santa Ana Mountains
RSA606520RSAIsoetes howelliiJon E. Keeley70901978-04-16 San DiegoCorner of Miramar Rd. and Carroll Rd.
RSA606521RSAIsoetes howelliiJon E. Keeley70911978-04-15 San DiegoWest of Highway 163 on Kearney Villa Rd. (north end.)
RSA639130RSAIsoetes howelliiR. F. Thorne37460A1968-04-18 RiversideSanta Rosa Plateau: Mesa de Colorado, Rancho California..
RSA639343RSAIsoetes howelliiL. C. Wheeler37571935-08-03 ModocWarner Mountains: Rock Lake, Pine Creek
RSA639344RSAIsoetes howelliiL. C. Wheeler40251935-10-06 ModocLily Lake, Pine Creek. (Mt. Diablo Mer.)
RSA639347RSAIsoetes howelliiL. C. Wheeler37851935-08-05 ModocBrandy, E fork Bidwell Creek. (Mt Diablo mer.)
RSA684553RSAIsoetes howelliiHenry M. Pollards.n.1947-04-07 VenturaMirror Lake
RSA684554RSAIsoetes howelliiChristopher Davidson56651977-05-25 RiversideMesa de Burro; Santa Rosa Plateau area of Santa Ana Mountains
RSA684565RSAIsoetes howelliiT. R. Pray10241955-07-18 TuolumneMather.
RSA739596RSAIsoetes howelliiJohn Dittes2003-282003-05-25 PlacerSacramento Valley; approximately 3.3 air-miles south of Lincoln, 0.5 air-miles due east of intersection of State Highway 65 and 12-Bridges Exit.; Roseville 7.5′
RSA757451RSAIsoetes howelliiR. F. Thorne552041982-05-01 RiversideSW of Murrieta. Santa Rosa Plateau, Mesa de la Punta near S. edge of plateau, approached from De Luz road
RSA795514RSAIsoetes howelliiP. Reisentzs.n.1979-04-22 VenturaMirror Lake, 0.5 miles south of intersection of Highway 150 and Highway 33, 3 miles southwest of Ojai, 12 miles north of Ventura.
RSA796365RSAIsoetes howelliiForrest Freund125.12013-03-20 MontereyFort Ord National Monument (former Fort Ord), eastern Twin Ponds.
RSA796366RSAIsoetes howelliiForrest Freund1242013-03-20 MontereyFort Ord National Monument (former Fort Ord), Butterfly Valley.
RSA796367RSAIsoetes howelliiForrest Freund1262013-03-20 MontereyFort Ord National Monument (former Fort Ord), along Trail 17.
RSA796368RSAIsoetes howelliiForrest Freund1272013-03-20 MontereyFort Ord National Monument (former Fort Ord), Lower Machinegun Flats.
RSA796369RSAIsoetes howelliiForrest Freund123.22013-03-20 MontereyFort Ord National Monument (former Fort Ord), E of California Hwy 1 (Cabrillo Hwy), along Trail 17 (between Addington Road and Hennekens Ranch Road).
RSA796370RSAIsoetes howelliiForrest Freund122.22013-03-20 MontereyFort Ord National Monument (former Fort Ord), E of California Hwy 1 (Cabrillo Hwy), along Trail 20 (between Addington Road and Hennekens Ranch Road).
RSA796371RSAIsoetes howelliiForrest Freund1282013-03-20 MontereyFort Ord National Monument (former Fort Ord), Marys Valley.
RSA84315RSAIsoetes howelliiF. W. Peirson92141930-08-14 TuolumneTuolumne Meadows. Sierra Nevada.
RSA84317RSAIsoetes howelliiF. W. Peirson33661923-03-28 San Diegonear boulevard on mesa about 6 miles north of San Diego
RSA87748RSAIsoetes howelliiC. L. Hitchcock196161952-06-25 ShastaBetween Project and Redding.
RSA88934RSAIsoetes howelliiChas. H. Quibell21561953-06-02 FresnoB3 ditch where it siphons successively under Shaw Ave., Santa Fe RR and Jeanne Ave, NW of Fresno.
SBBG226999SBBGIsoetes howelliiD. H. Wilken156751999-04-28 MontereyLos Padres National Forest; Santa Lucia Memorial Park, ca. 0.4 km ENE of Indian Ranger Station, ca. 2.6 W of The Indians
SBBG227000SBBGIsoetes howelliiClare B. Hardham19441957-05-12 San Luis ObispoLos Padres National Forest; Green′s Lake
SBBG227001SBBGIsoetes howelliiClare B. Hardham19431957-05-12 San Luis Obisponear Green′s Lake
SBBG227002SBBGIsoetes howelliiLowell Ahart107902004-04-29 TehamaDead Rabbit Lake, E of Nomalaki Trail, ca. 0.7 W of Bowers Crk, ca. 1.5 mi NW of USFS Rd 23N69 (Mud Flat Rd), ca. 7 air mi SW of Paskenta
SBBG227003SBBGIsoetes howelliiHenry M. Pollard1959-05-11 VenturaMirror Lake
SBBG227004SBBGIsoetes howelliiAlice Eastwood57711938-05-18 Lakenear Adams Springs
SBBG227005SBBGIsoetes howelliiClare B. Hardham19431958-05-12 San Luis ObispoLos Padres National Forest; Green′s Lake, crest N of Cypress Mtn
SBBG227006SBBGIsoetes howelliiR. F. Thorne438521973-05-23 RiversideSanta Rosa Plateau, N side of Mesa de Colorado
SBBG227007SBBGIsoetes howelliiL. L. Kiefer5291963-05-18 VenturaMirror Lake, S of airport, jct of Hwys 150 and 399
SBBG227008SBBGIsoetes howelliiJ. Dittes2003-282003-05-25 Placerca. 3.3 air-mi S of Lincoln, 0.5 air-mi E of jct of State Hwy 65 and Twelve Bridges Exit
SBBG227009SBBGIsoetes howelliiLowell Ahart187032013-05-22 Butteca. 0.5 mi SE of the Honcut Cemetery, ca. 3.25 NE of Honcut
SD00018290SDIsoetes howelliiJerilyn Hirshberg26242017-04-15 San DiegoCleveland National Forest, NW of Cuyamaca Mountains, about 6 miles south of intersection of Hwy 78 & 79 in Santa Ysabel, .4 miles SW of large holding pond on northern edge of Eagle Peak Road at Kessler Flat
SD00018339SDIsoetes howelliiMargaret Fillius2212017-03-10 San DiegoMiramar; W of runway Miramar Naval Air Station; vernal pool; just West of 805 and South of Nobel Drive.
SD00018340SDIsoetes howelliiMargaret Fillius2232017-03-10 San DiegoMiramar; W of runway Miramar Naval Air Station; vernal pool; just West of 805 and South of Nobel Drive.
SD00018341SDIsoetes howelliiMargaret Fillius2392017-04-05 San DiegoMiramar; W of runway Miramar Naval Air Station; vernal pool; just West of 805 and South of Nobel Drive.
SD00034105SDIsoetes howelliiHenk van der Werff44621982-04-16 San DiegoPine Valley, Corte Madera Ranch In mud of vernal pool
SD111888SDIsoetes howelliiBarbara Ertter32881980-05-07 ButtePeter Ahart Ranch, ca 2.5 miles north northeast of Honcut between Oroville and Marysville, dry ditches in oatfield near pond
SD112459SDIsoetes howelliiDarley F. Howe13081941-05-11 San DiegoMiramar
SD114727SDIsoetes howelliiHenk van der Werff44531982-03-28 San DiegoKearney Mesa near San Diego
SD115095SDIsoetes howelliiWayne P. Armstrongs.n.1983-05-01 San DiegoAlong Kearney Villa Road, one mile north of Clairemont Mesa Boulevard
SD120719SDIsoetes howelliiEdward Lee22731936-07-04 Santa ClaraMount Hamilton Range, pond in hollow on ridge from Mt. Day to junction of Smith and Santa Isabela creeks
SD13016SDIsoetes howelliiF. M. Cotas.n.1935-04-01 San DiegoCamp Kearny Mesa
SD131805SDIsoetes howelliiBarbara Ertter82631989-04-22 MercedFlying M Ranch, ca 10 air miles northeast of Merced, along streamlet cutting through low bluffs southeast of pools on Burns Creek
SD132950SDIsoetes howelliiTimothy Cass651979-04-30 San DiegoVernal pool W of Miramar Land Fill, Dump ponds (#′s 1-6)
SD132951SDIsoetes howelliiTimothy Cass371979-04-27 San DiegoCamp Elliot, Beauchamp′s Bend #1
SD14606SDIsoetes howelliiFrank F. Gander1386B1936-04-15 San DiegoNear Ramona
SD17374SDIsoetes howelliiFrank F. Gander37101937-05-11 San DiegoNear county line on US 395
SD17470SDIsoetes howelliiFrank F. Gander3806-3806-11937-05-11 San Diego2 miles north of Poway Junction on US 395
SD17472SDIsoetes howelliiFrank F. Gander3806-31937-05-11 San Diego2 miles north of Poway Junction, US 395
SD204904SDIsoetes howelliiR. F. Thorne552041982-06-05 RiversideSanta Ana Mountains region: SW of Murrieta. Santa Rosa Plateau, Mesa de la Punta near south edge of plateau, approached from De Luz road.
SD207443SDIsoetes howelliiGena Calcarone1792005-04-13 San DiegoRamona Grassland Preserve, 200 NE of junction Highland Valley Rd and Rangeland Rd., in Cagney swale.
SD38490SDIsoetes howelliiEdith A. Purer7232A1937-04-16 San DiegoCamp Kearney Mesa
SD38491SDIsoetes howelliiEdith A. Purer71111937-03-02 San DiegoCamp Kearney Mesa
SD68955SDIsoetes howelliiRobert F. Thorne375681968-05-08 RiversideSanta Rosa Plateau, vernal marsh on Mesa de Colorado
SD90574SDIsoetes howelliiRobert F. Thorne379301969-05-12 RiversideSanta Rosa Plateau, Rancho California, large vernal marsh on south end of Mesa de Colorado
SDSU01990SDSUIsoetes howelliiCota, F. M.2131932-02-01 San DiegoCamp Kearny.
SDSU20309SDSUIsoetes howelliiOlson, Mark4221993-06-18 Santa BarbaraBurton Mesa Project Area: W of Vandenberg Village, nearly a mile SW of Cabrillo High School, S of Hwy 1. Shown as intermittent pond on Lompoc quadrangle.
SDSU23025SDSUIsoetes howelliiWier, H.9471995-04-08 San DiegoBetween Kearny Villa Road and Interstate 15 north of FAA facility.
SFSU000025SFSUIsoetes howelliiJay Kelley74-1091974-05-04 SolanoE. side of Vanden rd., 1.5mi. from the Vanden, Peabody Rd. intersection.
SFSU000026SFSUIsoetes howelliiGordon H. True42051967-08-06 ?  MendocinoVernal pool near Pt. Arena
SFSU000027SFSUIsoetes howelliiH. D. Thiers39791 HDT1979-06-06 LassenBlue Lake, Blue Lake Campground, Modoc National Forest
SFSU000028SFSUIsoetes howelliis.n.s.n.1941-07-06 MarinPond on Hidden Lake Fire-trail
UC1094376UCJEPSIsoetes howelliiS. Galen Smith, J. Anderson29861957-06-08 Lake1.5 mi. e. Loch Lomond (0.25 mi. e. of rd. to Siegler Springs)
UC1094398UCJEPSIsoetes howelliiR. C. Bacigalupi, S. Galen Smith59711957-06-27 Siskiyou2 mi. s. Weed (along Hwy. 99)
UC111604UCJEPSIsoetes howelliiDr. E. B. Copeland32811903-05-30 ButteChico
UC1177514UCJEPSIsoetes howelliiJohn Thomas Howell232041947-05-25 MarinMt. Tamalpais, Willow Meadow
UC1181570UCJEPSIsoetes howelliiR. F. Hoover22111937-05-18 SacramentoRio Linda
UC1192365UCJEPSIsoetes howelliiMalcolm A. Nobs, S. Galen Smith13861949-08-18 Plumasjust s. Chester (Last Chance Marshes at n. end of Lake Almanor); Lake Almanor, Last Chance Marshes
UC1212196UCJEPSIsoetes howelliiH. E., S. T. Parks241371938-06-01 Del NorteDarlingtonia, Smith R.
UC1223545UCJEPSIsoetes howelliiJoseph P. Tracy, Mr. Murphy195821951-06-26 Humboldtupper of Twin Lakes
UC1225879UCJEPSIsoetes howelliiJoseph P. Tracy16899 1-21941-05-30 Mendocino4 mi. n. Calpella (Redwood Valley); Redwood Valley
UC1239794UCJEPSIsoetes howelliiHarold E. Parks, Joseph P. Tracy112521935-06-02 Del Norteca. 2 mi. e. Gasquet (vicinity of Darlingtonia Canon Smith R.); Smith R.
UC1259254UCJEPSIsoetes howelliiL. L. Kiefer15041965-04-18 San Diegoa little w. Miramar Naval Air Station (n. of Miramar Rd., < Kerney Meas > ); < Kerney Meas >
UC1259255UCJEPSIsoetes howelliiL. L. Kiefer15391965-05-23 VenturaOjai Valley, Mirror Lake
UC1259502UCJEPSIsoetes howelliiLowell Ahart1978-04-21 ButteHoncut, Peter Ahart Ranch
UC1260173UCJEPSIsoetes howelliiRobert F. Thorne449801974-07-27 Laken. of Harrington Flat Rd. Boggs Lake
UC1392747UCJEPSIsoetes howelliiR. F. Hoover111271968-05-28 Shastaat Old Alturas Rd. Clough Creek
UC150789UCJEPSIsoetes howelliiT. S. Brandegee1895-04-08 San DiegoEl Canon
UC1532802UCJEPSIsoetes howelliiRobert F. Thorne, Earl Lathrop455421975-05-20 RiversideRancho California, Mesa de Burro
UC1562586UCJEPSIsoetes howelliiBarbara Ertter, Travis Columbus, Holly Forbes82631989-04-22 Mercedca 10 air mi ne Merced (Flying M Ranch, se of pools on Burns Creek)
UC1584757UCJEPSIsoetes howelliiEd Lee1979-06-09 MarinHigh Marsh
UC1586565UCJEPSIsoetes howelliiVernon H. Oswald, Lowell Ahart45711991-05-09 Tehamaca 6.5 mi nne Red Bluff (ca 1.5 mi ne of Bend Bridge over Sacramento River, ca 400 ft w of large impoundment at entrance kiosk); Paynes Creek Recreation Area
UC1594524UCJEPSIsoetes howelliiVernon H. Oswald, Lowell Ahart49211992-04-21 Tehamaca 5.5 air mi se of Paynes Creek (Finley Lake on Hogstack Rd (Forest Rd 2 N24))
UC1594525UCJEPSIsoetes howelliiVernon H. Oswald, Lowell Ahart49081992-04-21 Tehamaca 11 air mi e Red Bluff (Hogstack Rd (Belle Mill Rd or Forest Rd 2 N24) near Mud Spring, 9.7 mi (odometer) e of Hwy 99)
UC1605509UCJEPSIsoetes howelliiTerry O′Brien21311995-05-01 Riversideca 5 mi sw of Grand Ave in Murrieta on Clinton Keith Rd Mesa de Colorado; Santa Rosa Plateau Preserve
UC1605510UCJEPSIsoetes howelliiTerry O′Brien21301995-05-01 Riversideca 5 mi sw of Grand Ave in Murrieta on Clinton Keith Rd Mesa de Colorado; Santa Rosa Plateau Preserve
UC1609389UCJEPSIsoetes howelliiVernon H. Oswald, Lowell Ahart56221993-06-28 Lassene Poison Lake (between Champs Flat and Harvey Valley, ne end of Little Harvey Valley, n of Hwy 44 along Rd 3 N47, along small branch of Pine Creek); Little Harvey Valley
UC1616163UCJEPSIsoetes howelliiTerry O′Brien3108A1997-03-19 Contra CostaVasco Caves, approx. 1 W of North Vasco Road and 1 N of Alameda-Contra Costa county line; access from North Vasco Road ca. 3 mi N of county line
UC1618153UCJEPSIsoetes howelliiJ. C. Game96-411996-05-25 Sonomaca 15 mi nw of Warm Springs Dam (along Rockpile Rd, in Rockpile Ranch)
UC1714615UCJEPSIsoetes howelliiL. C. Erickson1939-05-21 San Diego8 mi. n. Kearney Mesa
UC1714616UCJEPSIsoetes howelliiL. C. Erickson1939-05-21 San DiegoKearney Mesa
UC1714617UCJEPSIsoetes howelliiL. C. Erickson1939-05-21 San DiegoKearney Mesa
UC1714618UCJEPSIsoetes howelliiL. C. Erickson1939-05-21 San Diego8 mi. n. Kearney Mesa
UC1728010UCJEPSIsoetes howelliiVern Yadon1998-05-07 MontereyBLM Lands e. of Hennekin′s Ranch Rd. Fort Ord
UC1731155UCJEPSIsoetes howelliiDean W. Taylor118961991-06-12 Shastaponds ca. 1.2 N of Lake Britton and 1 mile West of Warner Grade Reservoir, just east of PG&E natural gas pipeline
UC1742198UCJEPSIsoetes howellii1938-06-23 Unknown
UC1818909UCJEPSIsoetes howelliiBarbara Ertter, Mary Bowerman140321995-05-07 Contra CostaThree-Springs Trail on northeast side of Mt. Diablo southeast of Clayton, in water of pond west of road in grassy flat.
UC1950034UCJEPSIsoetes howelliiR. F. Thorne, E. W. Lathrop, S. Bickstrom-Sternberg, B. Martin552041982-05-01 RiversidePeninsular Ranges; Santa Ana Mountains region: SW of Murrieta. Santa Rosa Plateau, Mesa de la Punta near S. edge of plateau, approached from De Luz road.
UC200762UCJEPSIsoetes howelliiKatharine Brandegee1910-05-29 MarinOlema
UC2062877UCJEPSIsoetes howelliiForrest Freund2552016-05-17 TehamaHog Lake vernal pool.
UC2079860UCJEPSIsoetes howelliiForrest Freund266.12017-05-10 SonomaAnadel State Park, damp meadow off Lake Trail.
UC279617UCJEPSIsoetes howelliiH. E. Parks30871925-09-18 MarinLake Lagunitas
UC353915UCJEPSIsoetes howelliiMilo S. Baker2131b1927-05-08 Sonomanear summit of Bennett Valley Rd.
UC353916UCJEPSIsoetes howelliiMilo S. Baker2281a1927-07-02 Lakealong hwy. 1 mi. n. Salmina′s Resort
UC375486UCJEPSIsoetes howelliiW. C. Blasdale1896-06-10 Trinity< Hyampum >
UC400942UCJEPSIsoetes howelliiMrs. C. C. Hall1923-01-01 TuolumneSalt Log near Mather (on ridge rd.); Salt Log
UC42837UCJEPSIsoetes howelliiC. C. Parry1889-05-01 ShastaAnderson
UC42852UCJEPSIsoetes howelliiMarshall A. Howe1461896-06-10 Trinitynear Hyampon
UC503070UCJEPSIsoetes howelliiJoseph P. Tracy87461930-06-15 HumboldtNorthern Coast Ranges. Larrabee Creek near Bosworth′s.
UC562459UCJEPSIsoetes howelliiHarold E. Parks, Joseph P. Tracy113251936-06-13 Del Norteca. 2 mi. e. Gasquet (vicinity of Darlingtonia Canon Smith R.); Smith R.
UC600418UCJEPSIsoetes howelliiH. F. Copeland1930-08-13 SacramentoSacramento, at Junior College
UC648479UCJEPSIsoetes howelliiL. C. Erickson1939-04-15 San DiegoKearney Mesa
UC648482UCJEPSIsoetes howelliiL. C. Erickson1939-04-15 San Diego8 mi. n. Kearney Mesa
UC648483UCJEPSIsoetes howelliiL. C. Erickson1939-04-15 San Diego8 mi. n. Kearney Mesa
UC648484UCJEPSIsoetes howelliiL. C. Erickson1939-04-15 San DiegoKearney Mesa
UC667940UCJEPSIsoetes howelliiJoseph P. Tracy156501937-08-12 HumboldtSnow Camp
UC667941UCJEPSIsoetes howelliiJoseph P. Tracy138411935-05-25 HumboldtFort Seward
UC667944UCJEPSIsoetes howelliiJoseph P. Tracy138421935-05-25 HumboldtFort Seward
UC692078UCJEPSIsoetes howelliiMary L. Bowerman31871935-07-22 Contra Costas. side Meridian Peak (Hidden Pond); Mt. Diablo, Hidden Pond
UC692079UCJEPSIsoetes howelliiMary L. Bowerman3187a1935-07-22 Contra Costas. side Meridian Peak (w. end Hidden Pond); Mt. Diablo, Hidden Pond
UC692080UCJEPSIsoetes howelliiMary L. Bowerman31661935-06-28 Contra CostaChase Pond s. of summit Mt.Diablo (by Old Government trail, e. side of pond);, Chase Pond
UC723171UCJEPSIsoetes howelliiH. K. Sharsmith36691936-05-21 Santa Claras. end of Mt. Day Ridge; Mt. Hamilton Range, Mt. Day Ridge
UC766778UCJEPSIsoetes howelliiRobert F. Hoover11431936-05-20 SutterPleasant Grove
UC766779UCJEPSIsoetes howelliiRobert F. Hoover11431936-05-20 SutterPleasant Grove
UC810503UCJEPSIsoetes howelliiJohn Thomas Howell130151937-06-06 SonomaSebastopol
UC810504UCJEPSIsoetes howelliiAlice Eastwood, John Thomas Howell57711938-05-18 Lakenear Adams Springs
UC907509UCJEPSIsoetes howelliiHerbert L. Mason1950-06-01 Sacramentojust above n end of Antioch Bridge (San Joaquin River)
UC936235UCJEPSIsoetes howelliiJoseph P. Tracy183981949-07-19 HumboldtGrouse Mt., Mud Lake
UCR113019UCRIsoetes howelliiLouis C. Wheeler37851935-08-05 ModocBrandy, E fork Bidwell Creek; Warner Mtns
UCR113634UCRIsoetes howelliiJune Lattings.n.1978-06-04 RiversideSanta Rosa Plateau, Mesa de Burro; Santa Ana Mtns.
UCR12618UCRIsoetes howelliiKeith H. Fisher680411--041968-04-11 San DiegoSan Diego, Kearney Mesa, c. 1 mile west of Hwy 395, edge of Miramar Road; Kearney Mesa
UCR222301UCRIsoetes howelliiR.F. Thorne552041982-06-01 RiversideSW of Murrieta, Santa Rosa Plateau, Mesa de la Punta near south edge of plateau, approached by De Luz Rd.
UCR224700UCRIsoetes howelliiAyzik Solomeshchs.n.2009-05-06 MontereyFort Ord, Trail 17
UCR225035UCRIsoetes howelliiAyzik Solomeshchs.n.2009-05-08 MontereyFort Ord, Marys Valley
UCR51945UCRIsoetes howelliiDavid Charlton10821987-08-29 MaderaBadger Lakes, several miles NE of Devils Post Pile. Minaret Wilderness Area, Inyo National Forest near the town of Mammoth Hot Springs; Sierra Nevada Mtns
UCR60722UCRIsoetes howelliiR.F. Thorne438521973-05-23 Riversidenorth side of Mesa de Colorado; Santa Rosa Plateau
UCSB020183UCSBIsoetes howelliiPaul Reisentzs.n.1979-04-22 VenturaMirror Lake, 1-2 miles S of intersection of Hwy 150 and Hwy 33, 3 miles SW of Ojai, 12 miles N of Ventura.
UCSB020184UCSBIsoetes howelliiBarbara J. Ertter82631989-04-22 MercedFlying M Ranch ca 10 air miles NE of Merced, T65 R15E. Pool along streamlet cutting through low bluffs SE of pools on Burns Creek.
UCSB020185UCSBIsoetes howelliiJan Jorgensen1501982-03-05 San DiegoNorth San Diego, Clairemont Mesa Blvd. to Kearny Mesa Rd. to its northern end.
UCSB020186UCSBIsoetes howelliiRobert F. Thorne519661978-05-21 RiversideSanta Rosa Plateau: Mesa de Colorado.
UCSB020187UCSBIsoetes howelliiPaul Reisentzs.n.1979-04-14 VenturaAt Mirror Lake, 1 mile south on Hwy 33 from Hwy 150, 3 miles SW of Ojai.
UCSB020188UCSBIsoetes howelliiClare B. Hardham10733c1963-06-05 San Luis ObispoBryson
UCSB020189UCSBIsoetes howelliiDieter H. Wilken64721969-03-03 San DiegoKearney Mesa, along road between US Highway 101 and US Highway 395, 1.5 miles W of US Highway 395.
UCSB020190UCSBIsoetes howelliiJohn Gray1D1976-05-08 SacramentoPhoenix Park, on Sunset Ave. approx. 3 miles N of Hwy 50 at Hazel Avenue exit. T 9N, R 7E.
UCSB020191UCSBIsoetes howelliiRick A. Burgess781982-06-26 VenturaMirror Lake, W side Hwy 33 between Hwy 150 Woodland Ave. Area destroyed by housing project.
UCSB020192UCSBIsoetes howelliiMark Olson4221993-06-18 Santa BarbaraBurton Mesa project area: W of Vandenberg Village, nearly a mile SW of Cabrillo High School, S of Hwy 1.
UCSC9757UCSCIsoetes howelliiD. Styer2702010-04-29 MontereyMary′s Valley (Ft Ord Region H7)
US3698737USIsoetes howelliiL. Ahart187032013-05-22 ButteAbout 1-2 mile southeast of the Honcut Cemetery, about 3 1-4 miles (air) northeast of Honcut.
YM-YOSE117153YMIsoetes howelliiCOLWELL, ALISON --GROSSENBACHER, DENA --WANAMAKER, HOLLY --MOORE, PEGGYAC05-522005-07-06 ?  TuolumneSMALL LAKE W OF PATE VALLEY, 0.6 NE OF MORRISON CREEK-TUOLUMNE RIVER CONFLUENCE, YOSEMITE NATIONAL PARK
YM-YOSE117981YMIsoetes howelliiCOLWELL, ALISON --SANDERS, ANGELA --COULTER, CHARLOTTEAC04-1452004-07-15 ?  TuolumneJUST EAST OF LAKE ELEANOR RANGER STATION, BY BOAT LAUNCH, YOSEMITE NATIONAL PARK.
YM-YOSE118501YMIsoetes howelliiColwell, Alison - -Grossenbacher, Dena - -Grove, Sara - -Ward, KimioraAC06-3732006-08-17 TuolumneMeadow at head of upper Lyell Canon, Lyell Fork of the Tuolumne River. Datum: NAD83. GPS Error: 2 M.
YM-YOSE118502YMIsoetes howelliiColwell, Alison - -Grossenbacher, Dena - -Grove, Sara - -Ward, KimioraAC06-3732006-08-17 TuolumneMeadow at head of upper Lyell Canon, Lyell Fork of the Tuolumne River. Datum: NAD83. GPS Error: 2 M.
YM-YOSE118556YMIsoetes howelliiColwell, Alison - -Grossenbacher, Dena - -Grove, SaraAC06-4532006-08-29 TuolumnePond complex 1 mile North of Ireland Creek - Tuolumne River confluence on East side of river, Lyell Canon. Datum: NAD83. GPS Error: 1 M.
YM-YOSE118559YMIsoetes howelliiColwell, Alison - -Grossenbacher, Dena - -Grove, SaraAC06-4602006-08-30 TuolumnePond 0.8 mile due West of Parker Pass Creek - Dana Fork of the Tuolumne River confluence and 0.25 mile North of Tioga Pass road. Datum: NAD83. GPS Error: 1 M.
YM-YOSE118560YMIsoetes howelliiColwell, Alison - -Grossenbacher, Dena - -Grove, SaraAC06-4602006-08-30 TuolumnePond 0.8 mile due West of Parker Pass Creek - Dana Fork of the Tuolumne River confluence and 0.25 mile North of Tioga Pass road. Datum: NAD83. GPS Error: 1 M.
YM-YOSE118824YMIsoetes howelliiGrossenbacher, Dena - -Niederer, ChristalDG06-1982006-08-02 TuolumnePond just North of Soda Springs, Tuolumne Meadows. Datum: NAD83.
YM-YOSE119041YMIsoetes howelliiGrossenbacher, Dena - -Lynds, Steve - -Quaranta, NickDG06-802006-05-29 TuolumneAbout half way between Hetch Hetchy Backpackers Camp and Kolana Rock, Hetch Hetchy Reservoir. Datum: NAD83.
YM-YOSE119075YMIsoetes howelliiMcGlinchy, Maureen - -Grossenbacher, Dena - -Grove, Sara - -Oliver, MartinMM012006-06-25 TuolumneSmall lake West of Pate Valley, 0.6 Northest of Morrison Creek-Tuolumne River confluence. Datum: NAD83. GPS Error: 3 M.

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