32.69000 32.79000 -114.77833 -114.67833 UC/JEPS: Consortium Search Results
Search Results — 271 specimen records retrieved (271 records with coordinates)
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC229303  Abronia villosa G. H. Mallory 1920-5-12 s.n. Imperial 5 mi south of Ogilby Station by R.R. track in Arroyo Comment
  CDA19630  Abronia villosa J. Chesi 1998-2-26 s.n. Imperial Winterhaven Agricultural Inspection Station 0 Comment
  SEINET893729  Abronia villosa Steven P. MacLaughlin, Janice E. Bowers 1985-1 2945 Imperial Jct. of frontage road and Sidewinder Road. 91 Comment
  UCR103360  Abronia villosa George K. Helmkamp, E. Helmkamp 1998-1-24 2590 Imperial Sonoran (Colorado) Desert, Along Hwy US-186, 1.6 mi. NE of the Mexican Border & Andrade. 61 Comment
  UCR163740  Abronia villosa B. G. Pitzer, G. R. Ballmer 2001-3-17 4273 Imperial Sonoran (Colorado) Desert, Algodonnes Dunes, south of end of Ogilby Rd. on south side of I-8 88 Comment
  RSA0024965  Abronia villosa var. villosa Jim Andre 2013-3-3 23981 Imperial Along Frontage Rd. at RR tracks, just N of I-8, just west of Winterhaven, approx. 3 miles NW of Yuma, AZ. 40 Comment
  UCR120507  Abronia villosa var. villosa George K. Helmkamp, E. A. Helmkamp 2001-3-17 6272 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  JEPS101832  Acacia greggii Dean W. Taylor 1998-5-12 16390 Imperial vicinity of Felicity (ca 3 road miles E of Colorado River on Interstate 8), near the Pilot Knob Substation 85 Comment
  RSA423478  Achyronychia cooperi Christopher Davidson 1979-4-28 7775 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  SD143958  Achyronychia cooperi G. K. Helmkamp, E. Helmkamp 1998-1-24 2591 Imperial Along US Hwy 186, 1.6 miles northeast of the Mexican border and Andrade 60 Comment
  SD28408  Achyronychia cooperi Frank F. Gander 1941-3-20 8990 Imperial Near Winterhaven, Araz Stage Station Comment
  UCR101698  Achyronychia cooperi B. G. Pitzer 1998-2-2 3503 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UCR120525  Achyronychia cooperi George K. Helmkamp, E. A. Helmkamp 2001-3-17 6275 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  RSA645384  Allium praecox Steven A. Junak 1995-4-11 5947 Santa Barbara San Miguel Island: SE end of island, just S of Trinagulation Point ''Lamb''. 76 Comment
  CAS-BOT-BC22396  Ambrosia dumosa George H. Mallory 1920-5-12 s.n. Imperial 5 mi south of Ogilby at side of R.R. track near arroyo Comment
  RSA416983  Ambrosia dumosa Christopher Davidson, Alan Romspert 1979-4-28 7784 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  UC472286  Ambrosia dumosa Joseph Grinnell 1910-5-10 San Bernardino near, (in dry sandy valleys, Colorado River) Pilot Knob; Colorado River Comment
Read comments
Jan 8 2013
  CAS-BOT-BC137674  Aristida adscensionis G. H. Mallory 1920-5-12 s.n. Imperial 5 miles south of Ogilby Station at side of Track in arroyo. Comment
  HSC83052  Aristida californica Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7760 Imperial Ogilby Rd., Algodones Dunes, dirt track continuation of Ogilby Rd. toward All American Canal, ca 1/8 mi. from the canal 41 Comment
  RSA385021  Aristida californica var. californica Christopher Davidson, Alan Romspert, Robert L. Rutherford 1979-4-28 7760 Imperial Alogodunes Dunes, dirt track continuation of Ogilby Rd., ca. 1/8 mile from All American Canal. 41 Comment
  HSC82750  Asclepias subulata Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7768 Imperial Off Hwy. 8 on Sidewinder Rd., 1.5 mi. NW of Pilot Knob 79 Comment
  JEPS101695  Asclepias subulata Dean W. Taylor 1998-5-12 16385 Imperial vicinity of Felicity (ca 3 road miles E of Colorado River on Interstate 8), near the Pilot Knob Substation 85 Comment
  RSA401108  Asclepias subulata Christopher Davidson 1979-4-28 7768 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  SBBG22842  Astragalus crotalariae D. Myrick 1965-2-26 1039 Imperial W of Yuma 45 Comment
  UCD104684  Astragalus crotalariae Donald Myrick 1965-2-26 1039 Imperial Desert west of Yuma. 45 Comment
  RSA253689  Astragalus magdalenae var. peirsonii Noel Holmgren, Patricia K. Holmgren 1973-3-28 6538 Imperial Along Interstate Hwy 8, 9 air miles west of Yuma. 121 Comment
  UC669210  Astragalus magdalenae var. peirsonii Annie M. Alexander and Louise Kellogg 1941-3-14 1937 Imperial w Yuma (Colorado Desert); , w of Yuma Comment
  UC669227  Astragalus magdalenae var. peirsonii Annie M. Alexander and Louise Kellogg 1941-3-14 1937 a Imperial w Yuma (Colorado Desert); , w of Yuma Comment
  SEINET898350  Astragalus nuttallianus Steven P. MacLaughlin, Janice E. Bowers 1985-1 2943 Imperial Jct. Sidewinder Rd. and I-8. 76 Comment
  RSA452367  Atriplex canescens L. H. Jones 1910-5-8 s.n. Imperial Colorado River near Pilot Knob Comment
  RSA452368  Atriplex canescens M. B. Dunkle 1935-4-18 s.n. Imperial W of Yuma 46 Comment
  SEINET288360  Atriplex linearis T. R. Van Devender, M. A. Dimmitt, J. J. Sanchez E. 2002-7-15 2002 -472 Unknown Ogilby Road, east side of Imperial (Algodones) Dunes, south of I.H. 8, west of Winterhaven, Imperial Sand Dunes Recreation Lands. Imperial County. 32 deg. 43'50 N, 114 deg. 45' W; 55 m.s.n.m. Comment
Read comments
Jan 7 2016
  CAS-BOT-BC99662  Baccharis salicifolia H. E. McMinn 1925-6-29 1468 Imperial Along the Col. River - 4 mi - N.W. of Yuma Comment
  POM350341  Baccharis salicifolia L. H. Jones 1910-5-9 s.n. Imperial Sandy second bottom, colorado River at Pilot Knob Comment
  UC469070  Baccharis salicifolia subsp. salicifolia Joseph Grinnell 1910-5-9 San Bernardino near Pilot Knob (Colorado River); Colorado River Comment
Read comments
Jan 8 2013
  SFV4263A  Baccharis salicina D. S. Verity, J. Turner, F. M. Ball 1964-2-15 s. n. Imperial About 45 miles east of Holtville on main highway to Yuma. Lowland. Side, dirt road beside drainage ditch. Comment
  UCR163737  Baileya pauciradiata B. G. Pitzer, G. R. Ballmer 2001-3-17 4269 B Imperial Sonoran (Colorado) Desert, Algodonnes Dunes, south of end of Ogilby Rd. on south side of I-8 88 Comment
  JEPS101322  Baileya pleniradiata Dean W. Taylor 1998-5-12 16389 Imperial vicinity of Felicity (ca 3 road miles E of Colorado River on Interstate 8), near the Pilot Knob Substation 85 Comment
  RSA350677  Baileya pleniradiata L. H. Jones 1910-5-9 s.n. Imperial Sandy second bottom, colorado River at Pilot Knob Comment
  UC472192  Baileya pleniradiata Joseph Grinnell 1910-5-8 Imperial Colorado River, Pilot Knob Comment
  UCR101684  Baileya pleniradiata B. G. Pitzer 1998-2-2 3499 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UCR120519  Baileya pleniradiata George K. Helmkamp, E. A. Helmkamp 2001-3-17 6276 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  UCR163743  Baileya pleniradiata B. G. Pitzer, G. R. Ballmer 2001-3-17 4269 Imperial Sonoran (Colorado) Desert, Algodonnes Dunes, south of end of Ogilby Rd. on south side of I-8 88 Comment
  CDA31550  Bouteloua barbata J. Chesi 1988-10-17 Imperial Winterhaven border station 0 Comment
  SD28409  Bouteloua barbata Frank F. Gander 1941-3-20 8991 Imperial Araz Stage Sta. near Winterhaven Comment
  RSA483137  Brassica tournefortii Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7753 Imperial Alogodunes Dunes, dirt track continuation of Ogilby Rd., ca. 1/8 mile from All American Canal. 41 Comment
  SD43746  Calandrinia ambigua Darley F. Howe 1949-3-19 1956 Imperial Andrade Comment
  RSA53774  Camissonia brevipes subsp. arizonica D. F. Howe 1949-3-19 s.n. Imperial Andrade. Comment
  POM122926  Camissonia cardiophylla Marcus E. Jones 1926-1-22 s.n. Imperial Pilot Knob. Comment
  UCR101717  Camissonia claviformis B. G. Pitzer 1998-2-2 3498 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  RSA135550  Camissonia claviformis subsp. aurantiaca Peter H. Raven 1958-1-26 11495 Imperial 8.3 miles west of Winterhaven, 0.9 miles west of State Inspection Station. Comment
  RSA135551  Camissonia claviformis subsp. aurantiaca Peter H. Raven 1958-1-26 11495 Imperial 8.3 miles west of Winterhaven, 0.9 miles west of State Inspection Station. Comment
  RSA135562  Camissonia claviformis subsp. aurantiaca Peter H. Raven 1958-1-26 11493 Imperial On dunes 3.6 miles west of Winterhaven. Comment
  POM145263  Camissonia pallida subsp. pallida C. L. Hitchcock 1928-3-17 s.n. Riverside 15 miles east of Banning. Comment
  CAS-BOT-BC276307  Chaenactis carphoclinia G. H. Mallory 1920-5-12 s.n. Imperial 5 miles S of Ogilby Station by railroad track Comment
  OBI39250  Chaenactis carphoclinia A. C. Sanders & K. R. Neisess, K. R. Neisess 1985-4-22 5626 Imperial S of the Cargo Muchacho Mts, ca 2 mi N of Hwy I-8 on Sidewinder Rd 122 Comment
  UCR40906  Chaenactis carphoclinia var. carphoclinia A. C. Sanders, K. R. Neisess 1985-4-22 5626 Imperial Sonoran (Colorado) Desert, alluvial fan south of Cargo Muchacho Mountains, 2 miles north of I-8 on Sidewinder Rd 105 Comment
  CDA19625  Chamaesyce polycarpa J. Chesi 1998-2-26 s.n. Imperial Winterhaven Agricultural Inspection Station 0 Comment
  CDA35264  Chamaesyce polycarpa J. Chesi 1988-11-17 s.n. Imperial Winterhaven Border Station. 0 Comment
  HSC80367  Chamaesyce polycarpa R. F. Thorne 1977-11-26 50908 Imperial N of Pilot Knob near junction of Sidewinder Rd. and Hwy. 18, E of Pilot Knob campground 67 Comment
  RSA302362  Chamaesyce polycarpa R. F. Thorne 1977-11-26 50908 Imperial North of Pilot Knob near jct. of Sidewinder Rd. and hwy I-8, east of Pilot Knob campground. 67 Comment
  RSA432489A  Chamaesyce polycarpa var. hirtella Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7770 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  RSA432494A  Chamaesyce polycarpa var. hirtella Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7763 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  UCR163972  Chenopodium murale B. G. Pitzer 1998-2-2 3505 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  HSC82768  Chilopsis linearis Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7747 Imperial Ogilby Rd., Algodones Dunes, dirt track continuation of Ogilby Rd. toward All American Canal, ca. 1/8 mi. from the canal. 41 Comment
  RSA392650  Chorizanthe corrugata Christopher Davidson, A. Romspert, H. Surprenant 1979-4-28 7781 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  RSA392743  Chorizanthe rigida Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7766 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  SD43745  Chorizanthe rigida Darley F. Howe 1949-3-19 1955 Imperial Andrade Comment
  SDSU4930  Chorizanthe rigida D. F. Howe 1949-3-10 1955 Imperial Andrade. Comment
  SD43754  Chylismia brevipes subsp. arizonica Darley F. Howe 1949-3-19 1946 Imperial Andrade Comment
  SDSU8599  Chylismia brevipes subsp. arizonica D. F. Howe 1949-3-19 1946 Imperial Andrade, Imperial Co. Comment
  CAS-BOT-BC160583  Chylismia claviformis subsp. aurantiaca Peter H. Raven 1958-1-26 11493 Imperial On dunes 3.6 miles west of Winterhaven Comment
  CAS-BOT-BC160598  Chylismia claviformis subsp. aurantiaca G. H. Mallory 1920-5-12 s.n. Imperial 5 mi south of Ogilby Station by R.R. track Comment
  RSA0015916  Chylismia claviformis subsp. aurantiaca Jim Andre 2013-3-3 23986 Imperial Along Frontage Rd. at RR tracks, just N of I-8, just west of Winterhaven, approx. 3 miles NW of Yuma, AZ. 40 Comment
  SD43766  Chylismia claviformis subsp. aurantiaca Darley F. Howe 1949-3-19 1977 Imperial Andrade. Comment
  UC1184439  Chylismia claviformis subsp. aurantiaca Peter H. Raven 1958-1-26 11493 Imperial dunes 3.6 mi w Winterhaven Comment
  UCR252834  Chylismia claviformis subsp. aurantiaca Jim Andre 2013-3-3 23986 Imperial Sonoran (Colorado) Desert, along frontage road at RR tracks, just N of Hwy I-8, just west of Winterhaven, c. 3 mi NW of Yuma, AZ 40 Comment
  SDSU8594  Chylismia claviformis subsp. yumae D. F. Howe 1949-3-19 1977 Imperial Andrade, Imperial Co. Comment
  RSA53987  Cistanthe ambigua D. F. Howe 1949-3-19 s.n. Imperial Andrade. Comment
  SDSU9747  Cistanthe ambigua D. F. Howe 1949-5-19 1956 Imperial Andrade, Imperial Co. 40 Comment
  SBBG35041  Croton californicus T. L. Secrest 1948-4-8 Imperial W of Yuma Comment
  SEINET9253080 Image available Croton californicus Jan Gish 1980-3-26 777 Imperial Transect 2, near Andrade. T16S R21E S35 SW4 of NE4. Colorado River floodplain. 43 Comment
  POM126409  Croton californicus var. mohavensis Joseph Grinnell 1910-5-10 s.n. Imperial Colorado River near Pilot Knob. Comment
  RSA479344  Croton californicus var. tenuis L. H. Jones 1910-5-10 s.n. Imperial In sandy valley, Colorado River, near Piolot Knob. Comment
  HSC66466  Croton wigginsii Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7767 Imperial Off Hwy. 8 on Sidewinder Rd., 1.5 mi. NW of Pilot Knob 79 Comment
  RSA480696  Croton wigginsii Christopher Davidson 1979-4-28 7767 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  SEINET286839  Croton wigginsii T. R. Van Devender, M. A. Dimmitt, J. J. Sanchez E. 2002-7-15 2002 -473 Unknown Ogilby Road, east side of Imperial (Algodones) Dunes, south of I.H. 8, west of Winterhaven, Imperial Sand Dunes Recreation Lands. Imperial County. 32 deg. 43'50 N, 114 deg. 45' W; 55 m.s.n.m. Comment
Read comments
Jan 7 2016
  UCR101701  Croton wigginsii B. G. Pitzer 1998-2-2 3510 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  POM368176  Cryptantha angustifolia Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7778 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  SD113299  Cryptantha angustifolia Darley F. Howe 1949-3-19 2060 Imperial Andrade Comment
  SD28406  Cryptantha angustifolia Frank F. Gander 1941-3-20 8988 Imperial Araz Stage Station, near Winterhaven Comment
  UCR120523  Cryptantha angustifolia George K. Helmkamp, E. A. Helmkamp 2001-3-17 6273 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  CAS-BOT-BC218798  Cryptantha holoptera Marcus E. Jones 1926-1-22 s.n. Imperial Pilot Knob Comment
  SD258357  Cryptantha maritima J. M. Andre 2013-3-3 23984 Imperial Yuma West; along frontage rd at RR tracks, just N of I-8, just west of Winterhaven, approx 3 mi NW of Yuma AZ 39 Comment
  CDA19626  Cryptantha racemosa J. Chesi 1998-2-26 s.n. Imperial Winterhaven Agricultural Inspection Station 0 Comment
  POM128297  Cucurbita palmata Joseph Grinnell 1910-5-8 s.n. Imperial Pilot Knob, Colorado River. Comment
  RSA394339  Cucurbita palmata L. H. Jones 1910-9-8 s.n. Imperial Pilot Knob at Colorado River. Comment
  UC1735829  Cynodon dactylon Dean W. Taylor 1998-5-12 16384 Imperial vicinity of Felicity (ca 3 road miles E of Colorado River on Interstate 8), near the Pilot Knob Substation 85 Comment
  RSA302358  Dalea mollis R. F. Thorne 1977-11-26 50912 Imperial North of Pilot Knob near jct. of Sidewinder Rd. and hwy I-8, east of Pilot Knob campground. 67 Comment
  UCD170878  Dalea mollis B. Pitzer 1998-2-2 3497 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park. 91 Comment
  UCR101703  Dalea mollis B. G. Pitzer 1998-2-2 3497 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  RSA404192  Dalea mollissima Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7782 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  UCR101704  Dalea mollissima B. G. Pitzer 1998-2-2 3513 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UC669226  Dieteria asteroides var. asteroides Annie M. Alexander and Louise Kellogg 1941-3-11 1925 Imperial 5 mi w Yuma; Colorado Desert, Chocolate Mountains Comment
  UC1765899  Ditaxis neomexicana Jan Gish 1980-3-26 776 Imperial Transect 2, near Andrade. 42 Comment
  UCR163961  Ditaxis neomexicana B. G. Pitzer 1998-2-2 3508 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  CDA35291  Ditaxis serrata Jack Troutwine 1992-7-14 Imperial Desert range west of Winterhaven. 0 Comment
  RSA421626  Ditaxis serrata Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7762 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  RSA421627  Ditaxis serrata Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7779 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  UCR101695  Dithyrea californica B. G. Pitzer 1998-2-2 3511 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UCR120524  Dithyrea californica George K. Helmkamp, E. A. Helmkamp 2001-3-17 6274 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  UCR163739  Dithyrea californica B. G. Pitzer, G. R. Ballmer 2001-3-17 4272 Imperial Sonoran (Colorado) Desert, Algodonnes Dunes, south of end of Ogilby Rd. on south side of I-8 88 Comment
  POM121852  Encelia farinosa var. farinosa Marcus E. Jones 1926-1-22 s.n. Imperial Pilot Knob. Comment
  CAS-BOT-BC131405  Encelia frutescens Marcus E. Jones 1926-1-22 s.n. Imperial Pilot Knob Comment
  HSC66474  Encelia frutescens A. P. Romspert, Harvey Surprenant 1979-4-28 7788 Imperial off Interstate 8 on the Sidewinder Rd. ca. 1.5 mi. NW of Pilot Knob 79 Comment
  POM121848  Encelia frutescens Marcus E. Jones 1926-1-22 s.n. Imperial Pilot Knob. Comment
  POM356712  Encelia frutescens Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7788 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  SD125216  Encelia frutescens var. frutescens Steven P. McLaughlin, Janice E. Bowers 1985-3-10 2940 Imperial Sidewinder Road, 2.2 miles north of I-8 74 Comment
  GMDRC5768  Ephedra trifurca J. M. Andre 2013-3-3 23985 Imperial along frontage rd at RR tracks, just N. of I-8, just west of Winterhaven, approx 3 mi. NW of Yuma AZ 40 Comment
  JEPS89198  Ephedra trifurca Herbert L. Mason 1957-3-31 14682 Imperial near Yuma (desert w of sand hills) Comment
  RSA0015665  Ephedra trifurca J. Andre 2013-3-3 23985 Imperial Along Frontage Rd. at RR tracks, just N of I-8, just west of Winterhaven, approx. 3 miles NW of Yuma, AZ. 40 Comment
  RSA516690  Ephedra trifurca Jan Gish 1980-3-26 789 Imperial Transect 2, near Andrade. 43 Comment
  UC1093646  Ephedra trifurca Herbert L. Mason 1957-3-31 14683 Imperial near Yuma (desert w of the sand hills) Comment
  UC1093647  Ephedra trifurca Herbert L. Mason 1957-3-31 14682 Imperial near Yuma (desrt w of the sand hills) Comment
  UCR102690  Ephedra trifurca B. G. Pitzer 1998-2-2 3506 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UCR252835  Ephedra trifurca Jim Andre 2013-3-3 23985 Imperial Sonoran (Colorado) Desert, along frontage road at RR tracks, just N of Hwy I-8, just west of Winterhaven, c. 3 mi NW of Yuma, AZ 40 Comment
  UCD62968  Eragrostis cilianensis Boswell 1950-9-1 Imperial Yuma area. Comment
  RSA53778  Eremalche rotundifolia D. F. Howe 1949-3-19 s.n. Imperial Andrade. Comment
  SD43748  Eremalche rotundifolia Darley F. Howe 1949-3-19 1971 Imperial Andrade. Comment
  SDSU8130  Eremalche rotundifolia D. F. Howe 1949-5-19 1971 Imperial Andrade, Imperial Co. Comment
  CAS-BOT-BC160024  Eremothera boothii subsp. condensata G. H. Mallory 1920-5-12 s.n. Imperial 5 mi south of Ogilby Station by R.R. track Comment
  UCD65741  Eriochloa contracta Boswell 1950-9-1 Imperial Yuma area. Comment
  RSA302363  Eriogonum deflexum var. deflexum Robert F. Thorne 1977-11-26 50907 Imperial North of Pilot Knob near jct. of Sidewinder Rd. and hwy I-8, east of Pilot Knob campground. 67 Comment
  RSA393282  Eriogonum deflexum var. deflexum Christopher Davidson, A. Romspert, H. Surprenant 1979-4-28 7774 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  JEPS56262  Eriogonum thomasii W. L. Jepson 1927-4-16 11744 Imperial sand hills near Pilot Knob Comment
  RSA424945  Eriogonum thomasii Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7776 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  GMDRC5767  Eschscholzia minutiflora J. M. Andre 2013-3-3 23983 Imperial along frontage rd at RR tracks, just N. of I-8, just west of Winterhaven, approx 3 mi. NW of Yuma AZ 40 Comment
  RSA0015940  Eschscholzia minutiflora Jim Andre 2013-3-3 23983 Imperial Along Frontage Rd. at RR tracks, just N of I-8, just west of Winterhaven, approx. 3 miles NW of Yuma, AZ. 40 Comment
  UCR120522  Eschscholzia minutiflora George K. Helmkamp, E. A. Helmkamp 2001-3-17 6279 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  UCR252833  Eschscholzia minutiflora Jim Andre 2013-3-3 23983 Imperial Sonoran (Colorado) Desert, along frontage road at RR tracks, just N of Hwy I-8, just west of Winterhaven, c. 3 mi NW of Yuma, AZ 40 Comment
  CAS-BOT-BC167347  Fagonia laevis Marcus E. Jones 1926-1-22 s.n. Imperial Pilot Knob Comment
  CAS-BOT-BC167351  Fagonia laevis Marcus E. Jones 1926-1-22 s.n. Imperial Pilot Knob Comment
  CAS-BOT-BC167362  Fagonia laevis Marcus E. Jones 1926-1-22 s.n. Imperial PIlot Knob Comment
  JEPS101694  Fagonia laevis Dean W. Taylor 1998-5-12 16387 Imperial vicinity of Felicity (ca 3 road miles E of Colorado River on Interstate 8), near the Pilot Knob Substation 85 Comment
  POM122665  Fagonia laevis Marcus E. Jones 1926-1-22 s.n. Imperial Pilot Knob. Comment
  RSA516695  Fagonia laevis E. Lehto 1980-3-17 767 Imperial Southside of Pilot Knob; north of All American Canal. 73 Comment
  RSA289735  Fouquieria splendens Lyman Benson 1933-4-1 4219 Imperial US 80, 5 mile W of Fort Yuma, Yuma Desert 30 Comment
  CAS-BOT-BC303543  Geraea canescens G. H. Mallory 1920-5-12 s.n. Imperial 5 miles S of Ogilby Station by RR track near arroyo Comment
  CDA19627  Geraea canescens J. Chesi 1998-2-26 s.n. Imperial Winterhaven Agricultural Inspection Station 0 Comment
  POM358649  Geraea canescens Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7769 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  UCR101358  Geraea canescens B. G. Pitzer 1998-2-2 3501 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UCR252832  Geraea canescens Jim Andre 2013-3-3 23980 Imperial Sonoran (Colorado) Desert, along frontage road at RR tracks, just N of Hwy I-8, just west of Winterhaven, c. 3 mi NW of Yuma, AZ 40 Comment
  UCR101688  Helianthus annuus B. G. Pitzer 1998-2-2 3516 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UCR101681  Hesperocallis undulata B. G. Pitzer 1998-2-2 3515 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  HSC66475  Hilaria rigida Christopher Davidson, A. P. Romspert, Harvey Surprenant 1979-4-28 7785 Imperial Off Hwy. 8 on Sidewinder Rd., 1.5 mi. NW of Pilot Knob 79 Comment
  SD144115  Hilaria rigida G. K. Helmkamp, E. Helmkamp 1998-1-24 Imperial Gravel Rd S of Hwy I-8. Rocky hills at W edge of Fort Yuma Indian Reservation 60 Comment
  RSA516697  Hymenoclea salsola Jan Gish 1980-3-26 781 Imperial Transect 2, near Andrade. 43 Comment
  HSC66563  Krameria erecta Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7789 Imperial Off Hwy. 8 on Sidewinder Rd., 1.5 mi. NW of Pilot Knob 79 Comment
  RSA302360  Krameria erecta Robert F. Thorne 1977-11-26 50910 Imperial North of Pilot Knob near jct. of Sidewinder Rd. and hwy I-8, east of Pilot Knob campground. 67 Comment
  RSA409436  Krameria erecta Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7789 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  JEPS101831  Krameria grayi Dean W. Taylor 1998-5-12 16395 Imperial vicinity of Felicity (ca 3 road miles E of Colorado River on Interstate 8), near the Pilot Knob Substation 85 Comment
  SDSU3127  Langloisia setosissima D. F. Howe 1949-3-10 2072 Imperial Andrade, Imperial County. 40 Comment
  SD44158  Langloisia setosissima subsp. setosissima Darley F. Howe 1950-3-19 2072 Imperial Andrade Comment
  UCR120521  Langloisia setosissima subsp. setosissima George K. Helmkamp, E. A. Helmkamp 2001-3-17 6278 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  HSC82751  Larrea tridentata Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7758 Imperial Algodones Dunes, dirt road continuation of Ogilby Rd., 1/8 mi. N of All American Canal. 41 Comment
  CAS-BOT-BC271060  Lolium temulentum G. H. Mallory 1920-5-12 s.n. Imperial 5 mi. south of Ogilby Station at side of R.R. track in arroyo Comment
  RSA406381  Lotus strigosus Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7777 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  SEINET4035761  Lupinus concinnus P. J. Knight 1979-1 630 Imperial Highway 8, 5 miles west of Yuma. Comment
  SD125187  Lycium torreyi Steven P. McLaughlin, Janice E. Bowers 1985-3-10 2952 Imperial 1.0 mile northeast of Andrade, along Colorado River. (IPB 10/07) 45 Comment
  POM362090  Machaeranthera tephrodes M. B. Dunkle 1935-4-18 4578 Imperial W of Yuma 46 Comment
  RSA433874  Malvella leprosa L. H. Jones 1910-5-11 s.n. Imperial second bottom on sandy slope, Colorado River near Pilot Knob Comment
  SD28402  Mentzelia desertorum Frank F. Gander 1941-3-20 8984 Imperial Araz Stage Station, near Winterhaven. (IPB 10/07) Comment
  CDA19628  Mentzelia longiloba J. Chesi 1998-2-26 s.n. Imperial Winterhaven Agricultural Inspection Station. 0 Comment
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Jan 24 2008
  CDA36688  Mentzelia longiloba Guy Beevor & J. L. Johnson 1964-3-19 Imperial 1 mile east of Andrade along the Mexican border. 0 Comment
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Sep 4 2016
  HSC66464  Mentzelia longiloba Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7756 Imperial Ogilby Rd., Algodones Dunes, dirt track continuation of Ogilby Rd. toward All American Canal, ca. 1/8 mi. from the canal. 41 Comment
  JEPS26719  Mentzelia longiloba Joseph Grinnell 1910-5-8 Imperial Pilot Knob, Colorado River. Comment
  SEINET889858  Mentzelia longiloba Steven P. MacLaughlin, Janice E. Bowers 1985-1 2955 Imperial Along frontage rd. N of I-8, just W of Andrade exit 60 Comment
  UC195033  Mentzelia longiloba Joseph Grinnell 1910-5-8 Imperial Colorado River, Pilot Knob Comment
  SD125142  Mentzelia longiloba var. longiloba Steven P. McLaughlin, Janice E. Bowers 1985-3-10 2955 Imperial In sandy soil, along frontage road north of I-8, just west of Andrade exit. 60 Comment
  UCR101714  Mentzelia longiloba var. longiloba B. G. Pitzer 1998-2-2 3502 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UCR163744  Mentzelia longiloba var. longiloba B. G. Pitzer, G. R. Ballmer 2001-3-17 4268 Imperial Sonoran (Colorado) Desert, Algodonnes Dunes, south of end of Ogilby Rd. on south side of I-8 88 Comment
  JEPS96886  Mesembryanthemum crystallinum Dean W. Taylor 1998-5-12 16386 Imperial vicinity of Felicity (ca 3 road miles E of Colorado River on Interstate 8), near the Pilot Knob Substation 85 Comment
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Oct 30 2007
  SD28407  Nama demissa var. demissa Frank F. Gander 1941-3-20 8989 Imperial Araz Stage Station, near Winterhaven. (IPB 10/07) Comment
  UCR102692  Nama hispida B. G. Pitzer 1998-2-2 3514 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UCR121153  Nama hispida George K. Helmkamp, E. A. Helmkamp 2001-3-17 6270 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  JEPS2656 Image available Nama hispida var. revoluta Jos. Grinnell 1910-5-8 Imperial Pilot Knob Colorado River; Pilot Knob, Colorado River Comment
  RSA421160  Nama hispida var. revoluta L. H. Jones 1910-5-8 s.n. Imperial Colorado River near Pilot Knob Comment
  UC196599  Nama hispida var. spathulata Joseph Grinnell 1910-5-8 Imperial Colorado River at Pilot Knob Pilot Knob; Colorado River Comment
  HSC82767  Oenothera deltoides Christopher Davidson, H. Surprenant, A. P. Romspert 1979-4-28 7741 Imperial Algodones Dunes, dirt road continuation of Ogilby Rd., 1/8 mi. N of All American Canal. 41 Comment
  RSA144658  Oenothera deltoides subsp. deltoides Peter H. Raven 1958-1-26 11509 Imperial 8.3 miles west of Winterhaven, 0.9 miles west of State Inspection Station. Comment
  UCR101719  Oenothera primiveris B. G. Pitzer 1998-2-2 3496 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  CAS-BOT-BC427428  Oligomeris linifolia G. H. Mallory 1920-5-12 s.n. Imperial 5 mi south of Ogilby at side of R.R. track Comment
  UCR101724  Oligomeris linifolia B. G. Pitzer 1998-2-2 3504 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  HSC82948  Olneya tesota A. C. Sanders, K. R. Neisess 1985-4-22 5625 Imperial S of Cargo Muchacho Mts., 2 mi N of I-8 on Sidewinder Rd 122 Comment
  OBI39249  Olneya tesota A. C. Sanders & K. R. Neisess, K. R. Neisess 1985-4-22 5625 Imperial S of the Cargo Muchacho Mts, ca. 2 mi N of Hwy I-8 on Sidewinder rd 122 Comment
  UCR40905  Olneya tesota A. C. Sanders, K. R. Neisess 1985-4-22 5625 Imperial Sonoran (Colorado) Desert, alluvial fan south of Cargo Muchacho Mountains, 2 miles north of I-8 on Sidewinder Rd 105 Comment
  UCR102691  Orobanche cooperi B. G. Pitzer 1998-2-2 3507 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  CAS-BOT-BC327876  Palafoxia arida Annie M. Alexander; Louise Kellogg 1941-3-3 1889 Imperial Colorado Desert. 6 miles W of Winterhaven, Yuma road Comment
  CAS-BOT-BC327883  Palafoxia arida G. H. Mallory 1920-5-12 s.n. Imperial 5 mi S of Ogilby Station at side of R.R. track Comment
  HSC82914  Palafoxia arida Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7742 Imperial Ogilby Rd., Algodones Dunes, dirt track continuation of Ogilby Rd. toward All American Canal, ca. 1/8 mi. from the canal 41 Comment
  UCR101690  Palafoxia arida B. G. Pitzer 1998-2-2 3500 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  RSA0028918  Palafoxia arida var. arida J. Andre 2013-3-3 23979 Imperial Along Frontage Rd. at RR tracks, just N of I-8, just west of Winterhaven, approx. 3 miles NW of Yuma, AZ. 40 Comment
  RSA302357  Palafoxia arida var. arida R. F. Thorne 1977-11-26 50913 Imperial North of Pilot Knob near jct. of Sidewinder Rd. and hwy I-8, east of Pilot Knob campground. 67 Comment
  RSA363729  Palafoxia arida var. arida Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7786 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  SD256698  Palafoxia arida var. arida J. M. Andre 2013-3-3 23979 Imperial Along frontage road at RR tracks, just N of I-8, just W of Winterhaven, approx 3 miles NW of Yuma AZ. Yuma West 7.5'Q) 39 Comment
  SD28405  Palafoxia arida var. arida Frank F. Gander 1941-3-20 8987 Imperial Araz Station near Winterhaven. Comment
  UC1531099  Palafoxia arida var. arida Robert F. Thorne et al. 1977-11-26 50913 Imperial n Pilot Knob (neat junction of Sidewinder Rd. and Hwy I-8, e of Pilot Knob Camprground); Colorado Desert 67 Comment
  UCR120531  Palafoxia arida var. arida George K. Helmkamp, E. A. Helmkamp 2001-3-17 6271 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  UCR163742  Palafoxia arida var. arida B. G. Pitzer, G. R. Ballmer 2001-3-17 4270 Imperial Sonoran (Colorado) Desert, Algodonnes Dunes, south of end of Ogilby Rd. on south side of I-8 88 Comment
  UCR253338  Palafoxia arida var. arida Jim Andre 2013-3-3 23979 Imperial Sonoran (Colorado) Desert, along frontage road at RR tracks, just N of Hwy I-8, just west of Winterhaven, c. 3 mi NW of Yuma, AZ 40 Comment
  GH427283  Palafoxia arida var. gigantea A. M. Alexander & L. Kellogg 1941-3-3 1889 Unknown 6 miles west of Winterhaven, Yuma Road Comment
  UC669219  Palafoxia arida var. gigantea Annie M. Alexander and Louise Kellogg 1941-3-3 1889 Imperial Yuma road 6 mi w Winterhaven; Colorado Desert Comment
  HSC66465  Panicum urvilleanum A. P. Romspert, H. Surprenant, Christopher Davidson 1979-4-28 7757 Imperial Algodones Dunes, Ogilby Rd., 1/8 mi. N of the All American Canal. 41 Comment
  SD128671  Parkinsonia florida Darley F. Howe 1980-4-13 Imperial 3 miles south of Highway 8 on Andrade Road Comment
  UCR117229  Parkinsonia florida B. G. Pitzer 1998-2-2 3512 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  UCR61926  Parkinsonia florida D. F. Howe 1980-4-13 s.n. Imperial Sonoran (Colorado) Desert, 3 miles south of Highway 8 on Andrade Road 38 Comment
  SD28404  Pectocarya heterocarpa Frank F Gander 1941-3-20 8986 Imperial Araz Stage Station near Winterhaven Comment
  CDA43032  Pennisetum ciliare Sandra E. - Sara B. 2014-10-6 PDR# 130 P06283559 Imperial Sleepy Hollow RV Park, 369 Algodones Road, Winterhaven. 0 Comment
  CAS-BOT-BC167691  Petalonyx linearis Peter H. Raven 1958-5-6 12909 Imperial 3.6 miles west of Winterhaven on United States Highway 80 Comment
  CAS-BOT-BC167730  Petalonyx thurberi H. E. McMinn 1925-6-29 1453 Imperial 4 mi. N.W. of Yuma, Ariz along highway Comment
  RSA161397  Petalonyx thurberi H. E. McMinn 1925-6-29 1453 Imperial 4 miles NW of Yuma, Imperial County Comment
  RSA445153  Petalonyx thurberi L. H. Jones 1910-5-10 s.n. Imperial In sandy valley, Colorado River, near Piolot Knob. Comment
  LA80915  Petalonyx thurberi subsp. thurberi Peter H. Raven; 1958-5-8 12909 Imperial 3.6 mi. W of Winterhaven on US Highway 80 Comment
  UC196587  Petalonyx thurberi subsp. thurberi Joseph Grinnell 1910-5-10 San Bernardino Colorado R. near Pilot Knob; Colorado R. Comment
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Jan 8 2013
  RSA0015917  Phacelia crenulata var. ambigua Jim Andre 2013-3-3 23987 Imperial Along Frontage Rd. at RR tracks, just N of I-8, just west of Winterhaven, approx. 3 miles NW of Yuma, AZ. 40 Comment
  SD113322  Phacelia crenulata var. ambigua Darley F. Howe 1949-3-19 2064 Imperial Andrade Comment
  SD143848  Phacelia crenulata var. ambigua G. K. Helmkamp, E. Helmkamp 1998-1-24 2593 Imperial Gravel road south of Highway I-8; rocky hills at west edge of Fort Yuma Indian Reservation. 60 Comment
  UCR120520  Phacelia crenulata var. ambigua George K. Helmkamp, E. A. Helmkamp 2001-3-17 6277 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  SD28403  Phacelia pediculoides Frank F. Gander 1941-3-20 8985 Imperial Araz Stage Station near Winterhaven Comment
  SBBG59874  Pholisma sonorae M. F. Gilman 1928-4-15 Imperial W of Yuma Comment
  CDA19629  Plantago ovata J. Chesi 1998-2-26 s.n. Imperial Winterhaven Agricultural Inspection Station 0 Comment
  UCR163741  Plantago ovata B. G. Pitzer, G. R. Ballmer 2001-3-17 4271 Imperial Sonoran (Colorado) Desert, Algodonnes Dunes, south of end of Ogilby Rd. on south side of I-8 88 Comment
  RSA402281  Plantago ovata var. fastigiata Christopher Davidson, A. Romspert, H Surprenant 1979-4-28 7780 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  RSA414082  Pleuraphis rigida Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7785 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  RSA472119  Pluchea sericea L. H. Jones 1910-5-8 s.n. Imperial Colorado River near Pilot Knob Comment
  RSA472121  Pluchea sericea M. B. Dunkle 1935-4-18 4576 Imperial river Bottom, W of Yuma 46 Comment
  SD128763  Pluchea sericea Darley F. Howe 1980-4-13 Imperial 3 miles south of Highway 8 on Andrade Road Comment
  UCR61925  Pluchea sericea D. F. Howe 1980-4-13 s.n. Imperial Sonoran (Colorado) Desert, 3 miles south of Highway 8 on Andrade Road 38 Comment
  RSA0013890  Proboscidea althaeifolia Robert F. Thorne 1977-11-26 50914 Imperial North of Pilot Knob near jct. of Sidewinder Rd. and hwy I-8, east of Pilot Knob campground. 67 Comment
  POM348729  Prosopis glandulosa var. torreyana M. B. Dunkle 1935-4-18 4577 Imperial W of Yuma 46 Comment
  SBBG92156  Prosopis glandulosa var. torreyana D. F. Howe 1980-4-13 Imperial Andrade Rd, 3 mi S of Hwy 8 Comment
  SD128673  Prosopis glandulosa var. torreyana Darley F. Howe 1980-4-13 Imperial 3 miles south of Highway 8 on Andrade Road Comment
  RSA0024966  Psorothamnus emoryi Jim Andre 2013-3-3 23982 Imperial Along Frontage Rd. at RR tracks, just N of I-8, just west of Winterhaven, approx. 3 miles NW of Yuma, AZ. 40 Comment
  UC669208  Psorothamnus emoryi Annie M. Alexander and Louise Kellogg 1941-3-13 1932 Imperial w Yuma; w of Yuma Comment
  UCR252836  Psorothamnus emoryi Jim Andre 2013-3-3 23982 Imperial Sonoran (Colorado) Desert, along frontage road at RR tracks, just N of Hwy I-8, just west of Winterhaven, c. 3 mi NW of Yuma, AZ 40 Comment
  CAS-BOT-BC340944  Psorothamnus spinosus H. E. McMinn 1925-6-29 1456 Imperial 4 mi. N.W. Yuma, Ariz., Col. Desert Comment
  UC57360  Sesbania herbacea William H. Holabird 1903-1 Imperial below Yuma Comment
  UCR101682  Sorghum halepense B. G. Pitzer 1998-2-2 3517 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  RSA447301  Sphaeralcea M. B. Dunkle 1935-4-18 4580 Imperial W of Yuma 46 Comment
  LA206033  Sphaeralcea ambigua F. R. Fosberg; 1932-4-9 7764 Imperial W of Colorado River, across from Yuma, Arizona Comment
  SBBG35067  Sphaeralcea emoryi T. L. Secrest 1948-4-8 Imperial near Yuma Comment
  SD128684  Sphaeralcea emoryi Darley F. Howe 1980-4-13 Imperial 3 miles south of Highway 8 on Andrade Road Comment
  UCR61923  Sphaeralcea emoryi D. F. Howe 1980-4-13 s.n. Imperial Sonoran (Colorado) Desert, 3 miles south of Highway 8 on Andrade Road 38 Comment
  LA205958  Sphaeralcea orcuttii F. R. Fosberg; 1932-4-9 7763 Imperial W of Colorado River, across from Yuma, Arizona Comment
  UCD93105  Sporobolus cryptandrus Boswell 1950-9-1 s.n. Imperial Yuma area. Comment
  UCD93106  Sporobolus cryptandrus Boswell 1950-9-1 s.n. Imperial Yuma area. Comment
  HSC82898  Stillingia spinulosa Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7771 Imperial Off Hwy. 8 on Sidewinder Rd., 1.5 mi. NW of Pilot Knob 79 Comment
  RSA457878  Stillingia spinulosa Alan Romspert, H. Surprenant 1979-4-28 7771 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob. 79 Comment
  UCR101702  Stillingia spinulosa B. G. Pitzer 1998-2-2 3509 Imperial Sonoran (Colorado) Desert, extension of Sidewinder Road, S and west of Pilot Knob RV park/campground, c. 1 mi. airline SW of Pilot Knob, on and adjacent to N berm of All-America Canal, c. 3.2 road mi. past the RV park 61 Comment
  RSA302355  Tidestromia oblongifolia R. F. Thorne, et al. 1977-11-26 50915 Imperial North of Pilot Knob near jct. of Sidewinder Rd. and hwy I-8, east of Pilot Knob campground. 67 Comment
  HSC80357  Tidestromia suffruticosa var. oblongifolia R. F. Thorne 1977-11-26 50915 Imperial N of Pilot Knob near junction of Sidewinder Rd. and Hwy. 18, E of Pilot Knob campground 67 Comment
  OBI37636  Tidestromia suffruticosa var. oblongifolia Robert F. Thorne 1977-11-26 50915 Imperial Colorado Desert: N of Pilot Knob near jctn of Sidewinder Rd and hwy 18, E of Pilot Knob Campground 67 Comment
  HSC66554  Tiquilia palmeri Christopher Davidson, A. P. Romspert, H. Surprenant 1979-4-28 7783 Imperial Off Hwy. 8 on Sidewinder Rd., 1.5 mi. NW of Pilot Knob 79 Comment
  POM122925  Tiquilia palmeri Marcus E. Jones 1926-1-22 s.n. Imperial Pilot Knob. Comment
  POM368521  Tiquilia palmeri Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7783 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  RSA302361  Tiquilia palmeri R. F. Thorne 1977-11-26 50909 Imperial North of Pilot Knob near jct. of Sidewinder Rd. and hwy I-8, east of Pilot Knob campground. 67 Comment
  SD125174  Tiquilia palmeri Steven P. McLaughlin, Janice E. Bowers 1985-3-10 2956 Imperial North of I-8, west of Andrade Exit. Comment
  SD28400  Tiquilia palmeri Frank F. Gander 1941-3-20 8982 Imperial Araz Stage Station near Winterhaven. Comment
  UCSB52636  Tiquilia palmeri Thorne, Robert 1977-11-26 Imperial Colorado Desert: North of Pilot Knob; near jct. of Sidewinder Rd. and Hwy. 18; east of Pilot Knob Campground 67 Comment
  POM368526  Tiquilia plicata Christopher Davidson, Alan Romspert, H. Surprenant 1979-4-28 7764 Imperial Off Interstate 8 on Sidewinder Rd, ca. 1.5 miles NW of Pilot Knob 79 Comment
  RSA302359  Tribulus terrestris Robert F. Thorne 1977-11-26 50911 Imperial North of Pilot Knob near jct. of Sidewinder Rd. and hwy I-8, east of Pilot Knob campground. 67 Comment



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