Search Results — 285 specimen records retrieved (200 records with coordinates)
Results for search: Scientific name=Persicaria hydropiperoides (including nomenclatural synonyms);   More information: Jepson Online Interchange

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

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC334485  Persicaria hydropiperoides P. DaSilva; A. Young; B. Traut; S. Tsiu; J. Woods 2013-8-10 13154 Marin Marin Municipal Water District Lands: Mount Tamalpais. East of Lagunitas Dam, between Lake Lagunitas and Lakeview Road, across from culvert LV-04 Comment
  CAS-BOT-BC418832  Persicaria hydropiperoides Brian Atwater 1978-10-24 BA- 165 Contra Costa Between Bethel Island and Holland Tract Comment
  CAS-BOT-BC418834  Persicaria hydropiperoides Clare B. Hardham 1957-9-3 2586 Kern Kern Co. Park Comment
  CAS-BOT-BC418836  Persicaria hydropiperoides H. P. Chandler 1912-8-6 1142 Mariposa Yosemite Valley 1210 Comment
  CAS-BOT-BC418837  Persicaria hydropiperoides H. P. Chandler 1912-8-6 1142 Mariposa Yosemite Valley 1210 Comment
  CAS-BOT-BC418839  Persicaria hydropiperoides Malcom A. Nobs; S. Galen Smith 1948-7-14 120 Merced Pond 1/4 mile south of Holister Club road. Gustine Gun Club, about 4 miles southeast of Gustine Comment
  CAS-BOT-BC418842  Persicaria hydropiperoides Le Roy Abrams 1901-6-11 1754 Orange New River near Long Beach Comment
  CAS-BOT-BC418843  Persicaria hydropiperoides Carl B. Wolf 1932-6-13 3719 Orange Fullerton, Malvern & Nicholas Aves. 53 Comment
  CAS-BOT-BC418844  Persicaria hydropiperoides J. Ewan 1931-10-3 5211 Riverside Santa Ana River 4 mi. N.W. of Corona Comment
  CAS-BOT-BC418845  Persicaria hydropiperoides Philip A. Munz 1935-10-21 14652 Riverside Santa Ana River, below Rincon Comment
  CAS-BOT-BC418846  Persicaria hydropiperoides Philip A. Munz 1935-10-21 14652 Riverside Santa Ana River, below Rincon Comment
  CAS-BOT-BC418851  Persicaria hydropiperoides V. F. Hesse 1958-10-16 2552 Santa Cruz Pinto Lake, near Freedom 60 Comment
  CAS-BOT-BC418852  Persicaria hydropiperoides V. F. Hesse 1958-10-16 2552 Santa Cruz Pinto Lake, near Freedom 609 Comment
  CAS-BOT-BC418853  Persicaria hydropiperoides V. F. Hesse 1960-8-30 2552 Santa Cruz Pinto Lake, near Freedom 60 Comment
  CAS-BOT-BC418857  Persicaria hydropiperoides Lowell Ahart 1977-8-31 s.n. Yuba 2 miles north-east of Marysville 30 Comment
  CAS-BOT-BC418860  Persicaria hydropiperoides Lowell Ahart 1987-9-4 5881 Butte On the bottom of North Honcut Creek, about 2 miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville 67 Comment
  CAS-BOT-BC418862  Persicaria hydropiperoides R. Bacigalupi; I. L. Wiggins; R. S. Ferris 1941-7-29 2688 Fresno 2 mi. west of Tranquility Junction on State Highway 180 Comment
  CAS-BOT-BC418863  Persicaria hydropiperoides David D. Keck 1932-9-28 1845 Fresno China Slough, creek through Centerville Comment
  CAS-BOT-BC418864  Persicaria hydropiperoides David D. Keck 1932-9-28 1845 Fresno China Slough, creek through Centerville Comment
  CAS-BOT-BC418865  Persicaria hydropiperoides Roxana S. Ferris; R. Bacigalupi 1951-8-24 12435 Fresno On General Grant Grove highway just east of Centerville Comment
  CAS-BOT-BC418866  Persicaria hydropiperoides Roxana S. Ferris; R. Bacigalupi 1951-8-24 12435 Fresno On General Grant Grove highway just east of Centerville Comment
  CAS-BOT-BC418871  Persicaria hydropiperoides J. W. Blankinship 1928-9-17 s.n. Lake Lakeport Comment
  CAS-BOT-BC418872  Persicaria hydropiperoides Le Roy Abrams 1901-8-1 2187 Los Angeles Ballona Creek Comment
  CAS-BOT-BC418873  Persicaria hydropiperoides LeRoy Abrams 1902-6-13 2530 Los Angeles Ballona Creek near Mesmer Comment
  CAS-BOT-BC418874  Persicaria hydropiperoides LeRoy Abrams 1904-9-2 4186 Los Angeles Los Angeles River, Los Angeles Comment
  CAS-BOT-BC418875  Persicaria hydropiperoides A. C. Sanders; T. B. Salvato; Mitch Provance 2009-5-27 36952 Los Angeles San Gabriel Valley: confluence of San Gabriel River and Walnut Creek, between El Monte and Baldwin Park, S of I-10 Fwy and north of Valley Blvd, W of I-605 Fwy, under SCE powerlines. 88 Comment
  CAS-BOT-BC418877  Persicaria hydropiperoides John Thomas Howell 1946-6-20 22107 Marin 4 miles n. of Bolinas Comment
  CAS-BOT-BC418878  Persicaria hydropiperoides John Thomas Howell 1945-10-14 s.n. Marin Olema Marshes Comment
  CAS-BOT-BC418879  Persicaria hydropiperoides John Thomas Howell 1946-9-20 s.n. Marin Laguna in Chileno Valley Comment
  CAS-BOT-BC418880  Persicaria hydropiperoides Doris K. Kildale 1928-7-18 5683 Mendocino 1 mile north of Willits on Redwood highway Comment
  CAS-BOT-BC418882  Persicaria hydropiperoides Gladys L. Smith 1978-8-15 5044 Mendocino Behind Pudding Creek Dam, built in 1953, north edge of Fort Bragg 15 Comment
  CAS-BOT-BC418884  Persicaria hydropiperoides S. B. Parish 1917-10-15 11616 San Bernardino San Bernardino Valley 304 Comment
  CAS-BOT-BC418885  Persicaria hydropiperoides S. B. Parish 1901-9-10 5099 San Bernardino Vicinity of San Bernardino 762 Comment
  CAS-BOT-BC418886  Persicaria hydropiperoides J. Ewan 1931-10-3 5205 San Bernardino Chino Creek, 2 miles south of Chino Comment
  CAS-BOT-BC418887  Persicaria hydropiperoides J. Ewan 1931-10-3 5206 San Bernardino Chino Creek, 2 miles south of Chino Comment
  CAS-BOT-BC418888  Persicaria hydropiperoides Brian Atwater 1978-8-24 BA- 106 San Joaquin Between Rindge [Ridge] Tract and Wright Tract Comment
  CAS-BOT-BC418890  Persicaria hydropiperoides Ira L. Wiggins 1940-8-12 9532 a San Joaquin 1 mi. NW. of San Joaquin River bridge on U. S. Highway 50 Comment
  CAS-BOT-BC418892  Persicaria hydropiperoides John Thomas Howell 1929-9-21 4417 San Joaquin Holt Comment
  CAS-BOT-BC418895  Persicaria hydropiperoides Greg de Nevers 1987-7-10 8237 Sonoma Pepperwood Ranch Natural Preserve, 3450 Franz Valley Rd., Santa Rosa 400 Comment
  CAS-BOT-BC418896  Persicaria hydropiperoides Greg de Nevers 1987-7-10 8237 Sonoma Pepperwood Ranch Natural Preserve, 3450 Franz Valley Rd., Santa Rosa 400 Comment
  CAS-BOT-BC418900  Persicaria hydropiperoides Peter Rubtzoff 1969-8-24 6144 Sonoma On River Road 3 mi. west of Fulton Comment
  CAS-BOT-BC418902  Persicaria hydropiperoides Peter Rubtzoff 1960-9-14 4535 Sonoma Laguna de Santa Rosa east of Graton (betw. Occidental and Guerneville roads) Comment
  CAS-BOT-BC418903  Persicaria hydropiperoides Peter Rubtzoff 1954-8-10 1675 Sonoma Bodega Head Marsh Comment
  CAS-BOT-BC418904  Persicaria hydropiperoides Peter Rubtzoff 1958-8-31 3953 Sonoma Atascadero Creek Marsh Comment
  CAS-BOT-BC418905  Persicaria hydropiperoides Peter Rubtzoff 1960-9-14 4526 Sonoma Laguna de Santa Rosa east of Graton (betw. Occidental and Guerneville roads) Comment
  CAS-BOT-BC418906  Persicaria hydropiperoides Peter Rubtzoff 1960-9-17 4565 Sonoma Laguna de Santa Rosa area northeast of Graton (near Laguna Road) Comment
  CAS-BOT-BC418908  Persicaria hydropiperoides Peter Rubtzoff 1958-7-19 3777 Sonoma Laguna de Santa Rosa east of Sebastopol Comment
  CAS-BOT-BC418909  Persicaria hydropiperoides Peter Rubtzoff 1958-8-31 3954 Sonoma Atascadero Creek Marsh Comment
  CAS-BOT-BC418911  Persicaria hydropiperoides Peter Rubtzoff 1963-10-5 5289 Sonoma Laguna de Santa Rosa east of Graton Comment
  CAS-BOT-BC418912  Persicaria hydropiperoides Peter Rubtzoff 1960-9-14 4540 Sonoma Laguna de Santa Rosa east of Graton (betw. Occidental and Guerneville roads) Comment
  CAS-BOT-BC418913  Persicaria hydropiperoides Peter Rubtzoff 1961-9-6 4739 Sonoma Laguna de Santa Rosa area northeast of Graton Comment
  CAS-BOT-BC418915  Persicaria hydropiperoides Peter Rubtzoff 1963-10-5 5290 Sonoma Laguna de Santa Rosa east of Graton Comment
  CAS-BOT-BC418916  Persicaria hydropiperoides Peter Rubtzoff 1956-9-15 2897 Sonoma Atascadero Creek Marsh Comment
  CAS-BOT-BC418917  Persicaria hydropiperoides Peter Rubtzoff 1958-8-9 3859 Sonoma Laguna de Santa Rosa north of Sebastopol (nr. Occidental Road) Comment
  CAS-BOT-BC418918  Persicaria hydropiperoides Peter Rubtzoff 1958-8-16 3880 Sonoma Laguna de Santa Rosa north of Sebastopol (nr. Occidental Road) Comment
  CAS-BOT-BC418919  Persicaria hydropiperoides Peter Rubtzoff 1958-8-23 3928 Sonoma Laguna de Santa Rosa east of Cunningham (nr. Llano Rd.) Comment
  CAS-BOT-BC418921  Persicaria hydropiperoides Peter Rubtzoff 1956-9-15 2907 Sonoma Atascadero Creek Marsh Comment
  CAS-BOT-BC418924  Persicaria hydropiperoides Peter Rubtzoff 1960-6-9 4476 Sonoma Laguna de Santa Rosa area northeast of Graton, near the Laguna Road Comment
  CHSC106098  Persicaria hydropiperoides Lowell Ahart; John Dittes 2010-7-30 16933 Siskiyou Along the south edge of the Shasta River, about 100 yards east of the East Louie Road Bridge, Shasta Big Springs Ranch, 1.6 miles (air) southwest of Big Springs Lake, 4.6 miles (air) northwest of Dwinnel Dam, 5.7 miles (air) southeast of Grenada. 716 Comment
  CHSC112667  Persicaria hydropiperoides Lowell Ahart 2013-10-19 19149 Glenn On the east side of the backwater, along the west side of the Sacramento River, about 300 yards north of the bridge, west of Butte City. 26 Comment
  CHSC36528  Persicaria hydropiperoides L. Ahart 1982-8-22 3748 Butte Peter Ahart Ranch, ca. 1 mi n and 3 mi e of Honcut. On wet sand along the edge of North Honcut Creek. 50 Comment
  CHSC37070  Persicaria hydropiperoides L. Ahart 1982-10-6 3847 Butte Peter Ahart Ranch, ca. 3 mi ne of Honcut. Along edges of North Honcut Creek. 50 Comment
  CHSC43266  Persicaria hydropiperoides Lowell Ahart 1987-9-4 5881 Butte On the bottom of a drying pond, on the bottom of North Honcut Creek, about 2 miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville. 67 Comment
  CHSC45379  Persicaria hydropiperoides Vernon Oswald 1983-10-10 1063 Butte Bidwell State Park on the e side of the Sacramento R. w of Chico. Growing in shallow water along the edges of Tyler Slough at the Indian Fishery located at the jct. of W. Sacramento Ave. and River Rd. Comment
  CHSC46202  Persicaria hydropiperoides L. P. Janeway 1986-9-20 1870 Butte Seasonally draining side creek on NW side of Little Chico Cr, near River Rd ca 2 mi S of Chico River Rd. 36 Comment
  CHSC51525  Persicaria hydropiperoides M. Bailey 1990-10-16 418 Butte North side of man-made pond #3, Butte College campus. Comment
  CHSC55244  Persicaria hydropiperoides Lowell Ahart 1991-10-14 6715 Butte On the sides of a reservoir, Joie Osgood Ranch, about 2 miles east of Honcut. 45 Comment
  CHSC55245  Persicaria hydropiperoides Lowell Ahart 1991-9-14 6716 Butte On the sides of a reservoir, Joie Osgood Ranch, about 2 miles east of Honcut. 45 Comment
  CHSC60915  Persicaria hydropiperoides Vernon H. Oswald 1993-6-23 5569 Glenn Sacramento National Wildlife Refuge located ca. 7 mi S of Willows, along the E side of Cell 2, Pool 10. Locally abundant emergent in a beck water of Logan Creek. 21 Comment
  CHSC66674  Persicaria hydropiperoides Vernon H. Oswald; Lowell Ahart 1996-7-22 8082 Butte Sacramento River National Wildlife Refuge, Llano Seco Unit. U. S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. Abundant in wet mud on the bottom of a drying slough on the W side of the levee at the SW corner of Tract 6, Sanctuary I. 30 Comment
  CHSC66898  Persicaria hydropiperoides Vernon H. Oswald 1996-10-22 8302 Butte Northern Sacramento Valley. Oroville Wildlife Area on the NW side of the Feather River just upstream from the outlet of Thermalito Afterbay. 33 Comment
  CHSC84592  Persicaria hydropiperoides Lowell Ahart; John Dittes 2003-9-17 10589 Tehama On the south edge of a gravel bar on the south side of Deer Creek, about 400 yards east of Highway 99, about 5 miles (air) southeast of Los Molinos. 60 Comment
  CHSC92662  Persicaria hydropiperoides D. Isle 2004-7-8 1378 Glenn Mendocino National Forest--North Coast Ranges. North of Princeton on edge W of Sacramento River. Comment
  CHSC99894  Persicaria hydropiperoides Lowell Ahart; John Dittes 2008-8-21 15245 Merced On the bottom of Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  HSC86711  Persicaria hydropiperoides Gladys L. Smith 1982-7-2 7615 Mendocino Along Hwy. 101 at Little Lake Valley Lagoon, 2 mi. N of Willits 427 Comment
  JEPS120312  Persicaria hydropiperoides Jake Ruygt 1992-8-6 3122 Napa Yountville Ecological Reserve, Yountville Cross Road, Napa River. Yountville 7.5' Quad. Comment
  JEPS120659  Persicaria hydropiperoides Lowell Ahart 2013-10-19 19149 Glenn On the east side of the backwater, along the west side of the Sacramento River, about 300 yards north of the bridge, west of Butte City. Comment
  JEPS125632  Persicaria hydropiperoides Daniel Slakey with CNPS Volunteers 2015-9-12 226 Contra Costa Browns Island, northern part of Crooked Slough. Comment
  RSA0064386  Persicaria hydropiperoides LeRoy Gross, Joy England, Naomi S. Fraga 2015-5-6 7328 Ventura USC/Best Property; Off Pyle Road, south of Highway 126. Almost halfway between Santa Paula and Fillmore. 99 Comment
  RSA0069598  Persicaria hydropiperoides LeRoy Gross, Sarah DeGroot, Cheryl Sevilla 2015-4-9 7064 Ventura Loughman/Peto Family Trust Properties; Along the river, just east of Santa Paula. End of S. Hallock Drive, south of Highway 126. 82 Comment
  RSA0083043  Persicaria hydropiperoides Sarah J. De Groot, Noravit Chumchim 2015-7-15 7454 Ventura The Nature Conservancy Banman (Prairie Pacific) Property. Santa Clara River floodplain east-southeast of Santa Paula, east of South Mountain Road, northwest of South Mountain, south of Sulphur Mountain/Santa Paula Ridge,, south of Highway 126. Oak Ridge Fault zone. 73 Comment
  SBBG125898  Persicaria hydropiperoides R. G. Swinney 2008-5-30 8895 Los Angeles San Gabriel Cyn at El Encanto, W bank of the river 256 Comment
  SBBG126174  Persicaria hydropiperoides A. C. Sanders with T. B. Salvato, M. Provance 2009-5-27 36951 Los Angeles confluence of San Gabriel River and Walnut Crk, between El Monte and Baldwin Park, S of I-10 Fwy and N of Valley Blvd, W of I-605 Fwy, under SCE powerlines 83 Comment
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Mar 24 2014
  SBBG132049  Persicaria hydropiperoides S. J. DeGroot, N. Chumchim 2015-7-15 7454 Ventura Santa Clara River floodplain ESE of Santa Paula, E of S Mtn Rd, NW of S Mtn; Nature Conservancy Banman (Prairie Pacific) Property 73 Comment
  SBBG1697  Persicaria hydropiperoides C. B. Hardham 1957-9-3 2586 Kern park near Bakersfield, edge of Kern River Comment
  SBBG20596  Persicaria hydropiperoides E. C. Twisselmann 1963-11-22 9134 Madera San Joaquin River, just E of Firebaugh 44 Comment
  SD123635  Persicaria hydropiperoides Peter Rubtzoff 1960-9-14 4526 Sonoma Laguna de Santa Rosa east of Graton, (betw. Occidental and Guerneville rds.) Comment
  SD197887 Image available Persicaria hydropiperoides A. C. Sanders 2004-6-10 28100 San Diego Carlsbad, Agua Hedionda Ecological Reserve, near El Camino Real and Cannon Rd. along lower Agua Hedionda Creek. 9 Comment
  SD207428  Persicaria hydropiperoides Stacy Anderson 2009-6-25 114 San Diego Ramona, Cleveland National Forest, SE of San Diego Country Estates, 1.4 mi E of S end of Thornbush Rd, W of Cedar Creek Falls, N side of creek 292 Comment
  SD227880  Persicaria hydropiperoides Scott D. White 1997-5-14 5125 Los Angeles Big Tujunga Wash: Sunland-Tujunga area; alluvial fan below San Gabriel Mts. SW of I-210 Freeway, E of Hansen Dam and N of Wentworth St. USGS 7.5' Sunland quad. 320 Comment
  SD230270  Persicaria hydropiperoides Louis C. Wheeler 1969-10-12 12355 San Bernardino San Gabriel Mountains: Glen Helen Park, Cajon Canyon. Comment
  SD231420  Persicaria hydropiperoides Scott D. White, Matt Carlton 2003-11-20 9868 Orange Santa Ana Mountain foothills: San Juan Creek in San Juan Capistrano. 24 Comment
  SD237571  Persicaria hydropiperoides A. C. Sanders 2009-11-6 37218 Los Angeles South Coast: Madrona Marsh, Torrance (Torrance 7.5'Q) 24 Comment
  SD241151  Persicaria hydropiperoides George K. Helmkamp, E. A. Helmkamp 2011-10-13 18410 El Dorado Northern Sierra Nevada Mountains Foothills: Forebay Road, 8.1 miles northwest of Pollock Pines at the south side of the bridge over the South Fork American River (Pollock Pines 7.5'Q) 611 Comment
  SD253531  Persicaria hydropiperoides R. G. Swinney 2011-11-3 15979 Los Angeles San Gabriel Mountains: Little Santa Anita Canyon, Fkirst Water, 1.7 miles up canyon from Mt. Wilson Trailhead, north of Sierra Madre. 622 Comment
  SJSU12000  Persicaria hydropiperoides N. A. Hopkins 1976-6-8 785 Santa Cruz N side of Pinto L c. 3 mi N of Watsonville Comment
  SJSU5986  Persicaria hydropiperoides C. W. Sharsmith 1972-6-24 7807 Sonoma Laguna de Santa Rosa, N of Sebastopol, E of Graton Comment
  UCD149578  Persicaria hydropiperoides Stephen P. Rae; Ayzik Solomeshch 2006-5-30 s.n. Napa On the north side of Soscol Ridge, south of the city of Napa, ca. 3/4 km east of Highway 121, on the south side of Soscol Creek. 25 Comment
  UCD150369  Persicaria hydropiperoides William Anderson 1963-9-27 s.n. Butte Sanborn Slough. Tule Goose Gun Club. 17 Comment
  UCD162384  Persicaria hydropiperoides Chuck Hughes 2015-5-27 430 Amador About 1 mile northwest of intersection of Highway 16 and Highway 124. 242 Comment
  UCD54151  Persicaria hydropiperoides Marta Laskowski 1993-8-8 10- 325 Sacramento Cosumnes River Preserve Plant Inventory. Comment
  UCD99319  Persicaria hydropiperoides Herbert L. Mason; Verne Grant 1946-8-14 13027 Butte Sacramento Outing Club. Comment
  UCD99327  Persicaria hydropiperoides G. L. Webster; G. L. Stebbins Jr. 1967-8-22 7529 Sutter Ca. 1 mile W of 'The Berry Patch' (6 miles W of Pennington). 15 Comment
  CAS-BOT-BC418831  Persicaria hydropiperoides Virginia I. Dains; Walter Knight 1986-8-8 5473 Contra Costa Jct Rock S1 & Werner Cut Comment
  CAS-BOT-BC418833  Persicaria hydropiperoides Carl B. Wolf 1928-8-11 3262 Inyo 5 miles so. of Bishop 1350 Comment
  CAS-BOT-BC418835  Persicaria hydropiperoides W. I. Follett; Evelyn B. Follett 1948-10-29 s.n. Kings Kings River 7 miles north of Hanford Comment
  CAS-BOT-BC418838  Persicaria hydropiperoides Peter H. Raven 1961-8-27 16614 Merced Along Merced River near bridge below Snelling Comment
  CAS-BOT-BC418840  Persicaria hydropiperoides Malcom A. Nobs; S. Galen Smith 1948-8-9 8302 Merced 1 mile west of Los Banos Comment
  CAS-BOT-BC418841  Persicaria hydropiperoides John Thomas Howell 1927-7-5 2653 Orange Near Horseshoe Bend, Santa Ana River bottom, Santa Ana Canon [Canyon] 152 Comment
  CAS-BOT-BC418847  Persicaria hydropiperoides Ira L. Wiggins 1985-9-28 22299 San Mateo Bed of San Francisquito Creek, N side of creek bed, just above Pop [Pope] Street bridge, Menlo Park Comment
  CAS-BOT-BC418848  Persicaria hydropiperoides Ira L. Wiggins 1985-9-28 22298 San Mateo Bed of San Francisquito Creek, N side of creek bed, just above Pope Street bridge, Menlo Park Comment
  CAS-BOT-BC418849  Persicaria hydropiperoides Roxana S. Ferris 1920-9-3 2047 San Mateo Santa Cruz Mountain Peninsula. 2nd Mud Lake, Coal Mine Ridge Comment
  CAS-BOT-BC418850  Persicaria hydropiperoides W. R. Dudley 1906-9-1 s.n. Santa Clara Santa Cruz Mountain Peninsula. Reservoir near Raymonds Comment
  CAS-BOT-BC418854  Persicaria hydropiperoides Lowell Ahart 1981-9-10 3133 Sutter South side of South Butte, Sutter Buttes 450 Comment
  CAS-BOT-BC418855  Persicaria hydropiperoides William Anderson 1964-10-10 s.n. Sutter Field & Tule Gun Club Comment
  CAS-BOT-BC418856  Persicaria hydropiperoides Ira L. Wiggins 1972-9-17 21946 Tuolumne Vacant lot on N side of Post Office, Twain Harte 1127 Comment
  CAS-BOT-BC418858  Persicaria hydropiperoides Lowell Ahart 1982-8-22 3748 Butte Along the edge of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 3 miles east of Honcut 50 Comment
  CAS-BOT-BC418859  Persicaria hydropiperoides Lowell Ahart 1982-10-6 3847 Butte Along the edges of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 3 miles east of Honcut 50 Comment
  CAS-BOT-BC418861  Persicaria hydropiperoides Herbert L. Mason; Verne Grant 1946-8-14 13027 Butte Butte Sink. On Sacramento Outing Club Comment
  CAS-BOT-BC418867  Persicaria hydropiperoides Lyman Benson 1931-8-31 2892 Lake Soda Bay, Middle N Coast Range, Clear Lake 426 Comment
  CAS-BOT-BC418868  Persicaria hydropiperoides Agnes M. Bowman 1901-9-1 s.n. Lake Lakeport Comment
  CAS-BOT-BC418869  Persicaria hydropiperoides Agnes M. Bowman 1901-9-7 s.n. Lake Lakeport Comment
  CAS-BOT-BC418870  Persicaria hydropiperoides Malcom A. Nobs; S. Galen Smith 1949-9-9 1857 a Lake At Scott Creek, Bridge 1431, northwestern end of Clear Lake Comment
  CAS-BOT-BC418876  Persicaria hydropiperoides Doreen Smith 1997-7-6 s.n. Marin 5-Brooks Pond, Pt. Reyes National Seashore Comment
  CAS-BOT-BC418881  Persicaria hydropiperoides Clare R. Wheeler 1978-9-27 689 Mendocino Mendocino National Forest. Howard Lake 1219 Comment
  CAS-BOT-BC418883  Persicaria hydropiperoides Gladys L. Smith 1982-7-2 7615 Mendocino Along Rte. 101 at Little Lake Valley, 2.0 mi. n. of Willits 426 Comment
  CAS-BOT-BC418889  Persicaria hydropiperoides L. R. Abrams 1920-9-30 7786 San Joaquin Near Bank Comment
  CAS-BOT-BC418891  Persicaria hydropiperoides John Thomas Howell 1929-9-21 4418 San Joaquin Holt Comment
  CAS-BOT-BC418893  Persicaria hydropiperoides John Thomas Howell 1946-8-17 22856 Sonoma The Laguna north of Sebastopol Comment
  CAS-BOT-BC418894  Persicaria hydropiperoides Catherine Best 1981-8-22 s.n. Sonoma On Stoetz Lane about 2 miles northeast of Occidental Comment
  CAS-BOT-BC418897  Persicaria hydropiperoides Peter Rubtzoff 1951-7-1 349 Sonoma Pitkin Marsh, near Forestville. North of the Lower Marsh Comment
  CAS-BOT-BC418898  Persicaria hydropiperoides Peter Rubtzoff 1951-9-2 711 Sonoma Pitkin Marsh, near Forestville. North of the Lower Marsh Comment
  CAS-BOT-BC418899  Persicaria hydropiperoides Peter Rubtzoff 1951-7-1 349 Sonoma Pitkin Marsh, near Forestville. North of the Lower Marsh Comment
  CAS-BOT-BC418901  Persicaria hydropiperoides Peter Rubtzoff 1964-8-20 5471 Sonoma 1 mi. south-east of Jenner (nr. crossing of Hwys. 1 & 12) Comment
  CAS-BOT-BC418907  Persicaria hydropiperoides Peter Rubtzoff 1958-7-20 3789 Sonoma Laguna de Santa Rosa northeast of Graton (nr. Guerneville Road) Comment
  CAS-BOT-BC418910  Persicaria hydropiperoides Peter Rubtzoff 1955-8-27 2099 Sonoma Bennett Mtn. Lake Comment
  CAS-BOT-BC418914  Persicaria hydropiperoides Peter Rubtzoff 1960-9-17 4569 Sonoma Laguna de Santa Rosa near Trenton (south of Woolsey Road) Comment
  CAS-BOT-BC418920  Persicaria hydropiperoides Peter Rubtzoff 1961-7-22 4665 Sonoma Bennett Mtn. Lake Comment
  CAS-BOT-BC418922  Persicaria hydropiperoides Peter Rubtzoff 1958-9-6 3968 Sonoma Laguna de Santa Rosa north of Cunningham (nr. Todd Road) Comment
  CAS-BOT-BC418923  Persicaria hydropiperoides Peter Rubtzoff 1963-9-1 5248 Sonoma Bennett Mtn. Lake Comment
  CAS-BOT-BC418925  Persicaria hydropiperoides Peter Rubtzoff 1958-8-17 3888 Sonoma Laguna de Santa Rosa northeast of Graton (nr. Guerneville Road) Comment
  HSC89764  Persicaria hydropiperoides Clare R. Wheeler 1978-9-27 689 Mendocino Mendocino National Forest, Howard Lake 1220 Comment
  SD99429  Persicaria hydropiperoides Peter Rubtzoff 1954-8-10 1675 Sonoma Bodega Head Marsh, open marshy ground Comment
  SEINET12887236 Image available Persicaria hydropiperoides S. B. Parish 1891-1 Unknown Comment
  SEINET12887238 Image available Persicaria hydropiperoides L. R. Abrams 1902-1 2530 Unknown Comment
  SEINET12887240 Image available Persicaria hydropiperoides I. M. Johnston 1907-1 1962 Unknown Comment
  SEINET12887241 Image available Persicaria hydropiperoides S. F. Blake 1910-1 863 Unknown Comment
  UC2027897  Persicaria hydropiperoides Barbara Ertter 1996-9-19 15295 Contra Costa Antioch Marina, edge of delta. Comment
  UCD62138  Persicaria hydropiperoides J. Buck 2000-7-1 113 Sacramento SACRAMENTO COUNTY: Cosumnes River Preserve, Willow Slough. Comment
  UCD99079  Persicaria hydropiperoides Frederica Bowcutt 1993-7-3 1671 Sacramento Delta Meadows River Park. About 25 air miles S of Sacramento, 10 air miles W of Galt, and 1 air mile NE of Walnut Grove. Immed. E of Locke, in the Sacramento River Delta, N of the Delta Cross Channel. At end of levee road on old Southern Pacific Railroad right-of-way along side slough off of Snodgrass Slough. 0 Comment
  UCD99086  Persicaria hydropiperoides Frederica Bowcutt 1993-7-16 1709 Sacramento Delta Meadows River Park. About 25 air miles S of Sacramento, 10 air miles W of Galt, and 3 air mile NE of Walnut Grove. 2 air miles NE of Locke, in the Sacramento River Delta, just S of Twin Cities Bridge. On western perimeter of northern most island in park in Snodgrass Slough. 0 Comment
  UCD99311  Persicaria hydropiperoides Frederica Bowcutt; Fred Hrusa and Sally Wagner 1992-7-18 9229 Sacramento Delta Meadows River Park. About 25 air miles S of Sacramento, 10 air miles W of Galt, and 1 air mile NE of Walnut Grove. Immediately E of Locke, in Sacramento River Delta, N of the Delta Cross Channel. 0 Comment
  UCD99313  Persicaria hydropiperoides James Dilley 1997-4-5 s.n. Los Angeles The Sepulvida Basin in the San Fernando Valley, 1/8 mile north of the dam. Comment
  UCD99316  Persicaria hydropiperoides P. B. Kennedy 1921-7-9 s.n. Merced Near Santa Rita Island, San Joaquin Valley. Comment
  UCD99321  Persicaria hydropiperoides Malcolm A. Nobs; S. Galen Smith 1949-9-9 1857 a Lake Scott Creek, Bridge 1431, northwestern end of Clear Lake. Comment
  UCD99323  Persicaria hydropiperoides Peter H. Raven 1961-8-27 16614 Merced Along Merced River near bridge below Snelling. Comment
  UCD99325  Persicaria hydropiperoides Larry Reynolds 1984-5-18 12 Sacramento 1/2 mi S of Hwy 50 at Scott Rd. 91 Comment
  UCSB57136  Persicaria hydropiperoides Marsh, G. 1975-7-28 Orange Huntington Beach; East Garden Grove-Wintersburg Flood Control Channel (no.C05); stream bank just N of Warner St. bridge crossing Comment
  UCSC007145  Persicaria hydropiperoides Randall Morgan 2004-9-19 4329 Santa Cruz Watsonville, Harkin Comment
  UCSC008682  Persicaria hydropiperoides Randall Morgan 2004-9-19 4329 B Santa Cruz Harkins Slough Comment
  CDA2783  Polygonum hydropiperoides Jerome Dunnicliff 1979-6-12 Kings 16th and Kansas Northeast, Stratford. 0 Comment
  CDA28655  Polygonum hydropiperoides G. D. Barbe, L. Pineda 1990-9-18 4398 Imperial 0.5 miles west of Guthrie Road on Worthington Road, north of NAS, 5.5 miles west of Imperial, Imperial Avenue. 0 Comment
  CDA32122  Polygonum hydropiperoides L. Ahart, John Dittes 2008-8-21 15245 Merced On the bottom of Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. Comment
  CDA36203  Polygonum hydropiperoides A. C. Sanders, Mitch Provance, T. B. Salvato 2009-6-1 37065 Los Angeles San Gabriel Valley; Rio Hondo in Whittier Narrows area, west of Rosemead Blvd. (Hwy 19) under SCE powerlines, beyond a tree nursery. Comment
  CLARK-A1528-3787  Polygonum hydropiperoides John C. Roos, Lucille Roos 1952-6-27 5799 San Bernardino San Bernardino 304 Comment
  JEPS104371  Polygonum hydropiperoides Lowell Ahart 2003-9-17 10589 Tehama On the south edge of a gravel bar on the south side of Deer Creek, ca 400 yd e of Highway 99, ca 5 mi (air) se of Los Molinos. 60 Comment
  JEPS112022  Polygonum hydropiperoides Dean G. Kelch and Andrew G. Murdock 2004-6-6 DGK 04 .228 Contra Costa Martinez - Train Station. Downtown Martinez. Alhambra Creek near bay and railroad Station. Comment
  JEPS112593  Polygonum hydropiperoides Jake Ruygt 1991-7-20 2771 Napa Lake Orville, Friesen's Lakes, Angwin 563 Comment
  JEPS114551  Polygonum hydropiperoides Lowell Ahart, John Dittes 2008-8-21 15245 Merced On the bottom of Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
  JEPS117465  Polygonum hydropiperoides Lowell Ahart, John Dittes 2010-7-30 16933 Siskiyou Along the south edge of the Shasta River, about 100 yards east of the East Louie Road Bridge, Shasta Big Springs Ranch, 1.6 miles (air) southwest of Big Springs Lake, 4.6 miles (air) northwest of Dwinnel Dam, 5.7 miles (air) southeast of Grenada 716 Comment
  JEPS50611  Polygonum hydropiperoides S. B. Parish Sep. 1886 San Bernardino Comment
  POM118164  Polygonum hydropiperoides H. P. Chandler 1912-8-6 1142 Mariposa Yosemite Valley. 1210 Comment
  POM156192  Polygonum hydropiperoides L. R. Abrams 1902-6-13 2530 Los Angeles Ballona Creek near Mesmer. Comment
  POM224747  Polygonum hydropiperoides P. A. Munz 1935-10-21 14652 Riverside Santa Ana River, below Rincon. Comment
  POM286373  Polygonum hydropiperoides Lyman Benson 1931-8-31 2892 Lake Soda Bay Middle N Coast, alt Clear Lake. 427 Comment
  POM466337  Polygonum hydropiperoides J. Ewan 1931-10-3 5205 San Bernardino Chino Creek, 2 miles south of Chino. Comment
  RSA0105495  Polygonum hydropiperoides R. G. Swinney 2011-11-3 15979 Los Angeles San Gabriel Mountains: Little Santa Anita Canyon, First Water, 1.7 miles up canyon from Mt. Wilson Trailhead, north of Sierra Madre. 622 Comment
  RSA0116457  Polygonum hydropiperoides Mitch Provance 2012-11-10 17604 Riverside San Bernardino Valley: Riverside, Springbrook Creek (remnant) Fairmont Park, between the east side of Lake Evans and the west side of Market St. 245 Comment
  RSA102351  Polygonum hydropiperoides S. B. Parish 1893-10 s.n. San Bernardino [Unspecified] Comment
  RSA195  Polygonum hydropiperoides J. T. Howell 1927-7-5 268 Orange West side, Rancho Santa Ana [Botanic Garden]. 152 Comment
  RSA234544  Polygonum hydropiperoides Peter Rubtzoff 1960-9-14 4535 Sonoma Laguna de Santa Rosa, E of Graton, (between Occidental and Guerneville road) Comment
  RSA289843  Polygonum hydropiperoides Barry A. Prigge 1980-9-17 4069 Riverside Coachella Valley Stormwater Channel: E of Munroe St., Indio. -3 Comment
  RSA466335A  Polygonum hydropiperoides J. Ewan 1931-10-3 5211 Riverside Santa Ana River, 4 mi. NW if Corona. Comment
  RSA466336A  Polygonum hydropiperoides S. B. Parish 1917-10-15 11616 San Bernardino San Bernardino Valley Comment
  RSA602463  Polygonum hydropiperoides Scott D. White 1997-5-14 5125 Los Angeles Big Tujunga Wash: Sunland-Tujunga area; alluvial fan below San Gabriel Mountains SW of I -210 freeway, E of Hansen Dam, and N of Wentworth St. 351 Comment
  RSA6067  Polygonum hydropiperoides Carl B. Wolf 1932-6-13 3719 Orange Storm drain at Malvern and Nicholas Aves; Fullerton. 53 Comment
  RSA618990  Polygonum hydropiperoides LeRoy Gross 1998-10-16 88 Los Angeles Southern base San Gabriel Mtns.: Tujunga Ponds. West of 210 freeway in big Tujunga wash, city of Sunland. 366 Comment
  RSA683223  Polygonum hydropiperoides Scott D. White, Matt Carlton 2003-11-20 9868 Orange Santa Ana Mountain foothills; San Juan Creek in San Juan Capistrano; (Dana Point) 24 Comment
  RSA713410  Polygonum hydropiperoides A. C. Sanders 2004-6-10 28100 San Diego South Coast: Carlsbad, Agua Hedionda Ecological Reserve, near El Camino Real and Cannon Rd., along lower Agua Hedionda Creek. 9 Comment
  RSA721174  Polygonum hydropiperoides J. Mark Porter 2001-11-18 13366 San Bernardino WHIPPLE MOUNTAINS: Foot of mountains, along the Colorado River. 146 Comment
  RSA746554  Polygonum hydropiperoides A. C. Sanders, T. B. Salvato, Mitch Provance 2009-5-27 36952 Los Angeles confluence of San Gabriel River and Walnut Creek, between El Monte and Baldwin Park, S of I-10 Fwy and north of Valley Blvd, W of I-605 Fwy, under SCE powerlines 83 Comment
  RSA747289  Polygonum hydropiperoides R. G. Swinney 2008-5-30 8895 Los Angeles San Gabriel Canyon along old road/trail at El Encanto 256 Comment
  RSA750233  Polygonum hydropiperoides A. C. Sanders, Mitch Provance, T. B. Salvato 2009-6-1 37065 Los Angeles Rio Hondo in Whittier Narrows area, west of Rosemead Blvd. (Hwy 19) under SCE powerlines, beyond a tree nursery 63 Comment
  RSA756069  Polygonum hydropiperoides T. B. Salvato, Billy Deane 2006-10-16 1927 Orange Irvine, San Diego Creek flood control channel, between Michelson Driveand the 405 Fwy. 9 Comment
  RSA756996  Polygonum hydropiperoides A. C. Sanders 2009-11-6 37218 Los Angeles Madrona Marsh, Torrance 24 Comment
  RSA758708  Polygonum hydropiperoides R. G. Swinney 2008-12-2 9905 Los Angeles mouth of San Gabriel Canyon between Foothill Blvd. and the I-210 Fwy, from main river channel to 300 m east. 165 Comment
  RSA762332  Polygonum hydropiperoides R. G. Swinney 2008-11-30 9862 Los Angeles Azusa, San Gabriel River Channel, 1.2 mi. north of Foothill Blvd. at mouth of Fish Canyon. 204 Comment
  RSA764408  Polygonum hydropiperoides Justin M. Wood 2009-8-18 1259 Los Angeles City of Claremont: Bernard Field Station; NW corner of Mills Ave and Foothill Blvd. 390 Comment
  RSA769016  Polygonum hydropiperoides L. Ahart, John Dittes 2008-8-21 15245 Merced Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  SEINET2042036 Image available Polygonum hydropiperoides George Helmkamp, E. A. Helmkamp 2000-8-29 5985 Riverside Colorado Desert: S of Mecca, where Lincoln St. Crosses the Whitewater River. Ca. 0.5 mi from the Salton Sea. 67 Comment
  SEINET4138034 Image available Polygonum hydropiperoides Dan S. Cooper 2011-7-23 711 -90 Los Angeles South Coast: Madrona Marsh, Torrance 24 Comment
  SEINET8072012  Polygonum hydropiperoides C. Elam 2004-1 AZ 050 -166 Imperial Oxbow outlet. Comment
  SFV20804  Polygonum hydropiperoides L. Gross 2000-8-25 262 Los Angeles San Fernando Valley Orcas Park, entered from Foothill Blvd onto Orcas Ave. Hiked west from park heading toward Hansen Dam. East side of Hansen Dam. 325 Comment
  UC1101166  Polygonum hydropiperoides Herbert L. Mason and S. Galen Smith 1948-8-9 8302 Merced 1 mi w Los Banos Comment
  UC1101167  Polygonum hydropiperoides Malcolm A. Nobs and S. Galen Smith 1949-9-9 1857 a Lake Bridge 1431 Clear Lake, Scott Creek (stream bank, nw end of lake) Comment
  UC1101169  Polygonum hydropiperoides Malcolm A. Nobs and S. Galen Smith 1949-8-11 1328 Del Norte 3 mi s Crescent City Comment
  UC1101170  Polygonum hydropiperoides Malcolm A. Nobs and S. Galen Smith 1949-8-4 1215 Mendocino 3.8 mi n Willits; Outlet Creek Comment
  UC1101171  Polygonum hydropiperoides Malcolm A. Nobs and S. Galen Smith 1948-9-5 561 Imperial above Laguna Dam (on bridge foundation); Colorado River Comment
  UC1101172  Polygonum hydropiperoides Malcolm A. Nobs and S. Galen Smith 1948-8-24 412 Merced 15 mi e Gustine; Alkaline Grasslands of San Joaquin Valley, Modesto Propert Comment
  UC1101173  Polygonum hydropiperoides Malcolm A. Nobs and S. Galen Smith 1948-8-24 405 Merced 15 mi e Gustine; Alkaline Grasslands of San Joaquin Valley, Modesto Propert Comment
  UC1101174  Polygonum hydropiperoides Malcolm A. Nobs and S. Galen Smith 1948-7-14 120 Merced pond 1/4 mi s Holister Club road (about 4 mi se of Gustine); Gustine Gun Club Comment
  UC1101175  Polygonum hydropiperoides Herbert L. Mason and Verne Grant 1946-8-14 13027 Butte Sacramento Outing Club Butte Sink (canal near big pond) Comment
  UC1101177  Polygonum hydropiperoides Herbert L. Mason 1929-9-21 5442 San Joaquin Holt Alklaline Grasslands of San Joaquin Valley Comment
  UC1101178  Polygonum hydropiperoides Herbert L. Mason 1928-9-30 4971 San Joaquin near Holt; Alkaline Grasslands of San Joaquin Valley, San Joaquin Del Comment
  UC1187044  Polygonum hydropiperoides V. F. Hesse 1960-8-30 2885 Santa Cruz near Freedom (lake shore); Pinto Lake 60 Comment
  UC1509634  Polygonum hydropiperoides L. Ahart 1982-8-22 3748 Butte ca 3 mi ne Honcut; Peter Ahart Ranch, North Honcut Creek 50 Comment
  UC1586531  Polygonum hydropiperoides Lowell Ahart 1991-9-14 6716 Butte about 2 mi e Honcut (sides of a large reservoir); Joie Osgood Ranch 45 Comment
  UC1586532  Polygonum hydropiperoides Lowell Ahart 1991-9-14 6715 Butte about 2 mi e Honcut (on sides of large reservoir); Joie Osgood Ranch 45 Comment
  UC219481  Polygonum hydropiperoides LeRoy Abrams 1902-6-13 2530 Los Angeles near Mesmer; Ballona Creek Comment
  UC311579  Polygonum hydropiperoides H. P. Chandler 1912-8-6 1142 Mariposa Yosemite Valley 1210 Comment
  UC582926  Polygonum hydropiperoides Philip A. Munz 1935-10-21 14652 Riverside below Rincon; Santa Ana River Comment
  UC6630  Polygonum hydropiperoides Michener and Bioletti Sept. 1892 San Joaquin San Joaquin Bridge Comment
  UC6637  Polygonum hydropiperoides Michener and Bioletti 1892-9-9 San Joaquin Lathrop Comment
  UC6706  Polygonum hydropiperoides S. B. Parish Oct. 1886 San Bernardino San Bernardino Comment
  UC6707  Polygonum hydropiperoides S. B. Parish 1895-7-20 3797 San Bernardino Vicinity of San Bernardino 304 Comment
  UC676911  Polygonum hydropiperoides R. Bacigalupi, I. L. Wiggins and R. S. Ferris 1941-7-29 2688 Fresno on State Hwy 180 2 mi w Tranquility Junction Comment
  UC729963  Polygonum hydropiperoides Carl B. Wolf 1932-6-13 3719 Orange Fullerton; Malvern and Nicholas Avenues 53 Comment
  UCR122569  Polygonum hydropiperoides George K. Helmkamp, E. A. Helmkamp 2000-8-29 5985 Riverside Colorado Desert., South of Mecca, where Lincoln St. crosses the Whitewater River, about 0.5 mile from the Salton Sea -67 Comment
  UCR129176  Polygonum hydropiperoides S. B. Parish 1917-10-15 11616 San Bernardino San Bernardino Valley, San Bernardino Valley 305 Comment
  UCR131389  Polygonum hydropiperoides Alison Lipman 1998-9-4 s.n. Los Angeles South Coastal Plains Region, Los Angeles, San Pedro area, Defense Fuel Support Point (Naval Reservation) 3171 North Gaffey St. 30 Comment
  UCR137001  Polygonum hydropiperoides A. C. Sanders 2004-6-10 28100 San Diego South Coast, Carlsbad, Agua Hedionda Ecological Reserve, near El Camino Real and Cannon Rd., along lower Agua Hedionda Creek 9 Comment
  UCR139909  Polygonum hydropiperoides Scott D. White 1997-5-14 5125 Los Angeles Base of San Gabriel Mtns, Big Tujunga Wash, Sunland-Tujunga area, SW of 210 Freeway, east of Hansen Dam and north of Wentworth Street 351 Comment
  UCR150564  Polygonum hydropiperoides Scott D. White, Matt Carlton 2003-11-20 9868 Orange South Coastal Plain, Santa Ana Mtn foothills. San Juan Creek in San Juan Capistrano 24 Comment
  UCR157681  Polygonum hydropiperoides Scott D. White 1994-7-18 2289 Los Angeles San Gabriel Mtns., San Dimas Canyon; along San Dimas Wash 335 Comment
  UCR170193  Polygonum hydropiperoides George K. Helmkamp, Elizabeth Helmkamp 2005-8-14 9820 El Dorado Northern Sierra Nevada Foothills, Diamond Springs. Lake Oaks mobile home park 521 Comment
  UCR19064  Polygonum hydropiperoides John C. Roos, L. Roos 1952-6-27 5799 San Bernardino San Bernardino Valley, City of San Bernardino; E Street south of the city 305 Comment
  UCR198023  Polygonum hydropiperoides Frederica Bowcutt 1993-7-3 1671 Sacramento Delta Meadows River Park, c. 25 air mi south of Sacramento, 10 air mi west of Galt, and 1 air mi northeast of Walnut Grove. Immediately east of Locke, in the Sacramento River Delta, north of the Delta Cross Channel. At end of levee road on old Southern Pacific Railroad right-of-way along side slough off of Snodgrass Slough 0 Comment
  UCR205737  Polygonum hydropiperoides A. C. Sanders, T. B. Salvato, Mitch Provance 2009-5-28 36985 Los Angeles San Gabriel Valley, San Gabriel River channel between Lower Azusa Rd. and the I-605 crossing, southwestern lobe of Irwindale between Baldwin Park and El Monte, under SCE powerlines 110 Comment
  UCR205940  Polygonum hydropiperoides A. C. Sanders, Mitch Provance, T. B. Salvato 2009-6-1 37065 Los Angeles San Gabriel Valley, Rio Hondo in Whittier Narrows area, west of Rosemead Blvd. (Hwy 19) under SCE powerlines, beyond a tree nursery 63 Comment
  UCR206480  Polygonum hydropiperoides R. G. Swinney 2008-5-30 8895 Los Angeles San Gabriel Mtns., San Gabriel Canyon at El Encanto, west bank of the river 256 Comment
  UCR206509  Polygonum hydropiperoides A. C. Sanders, T. B. Salvato, Mitch Provance 2009-5-27 36952 Los Angeles San Gabriel Valley, confluence of San Gabriel River and Walnut Creek, between El Monte and Baldwin Park, S of I-10 Fwy and north of Valley Blvd, W of I-605 Fwy, under SCE powerlines 88 Comment
  UCR206510  Polygonum hydropiperoides A. C. Sanders, T. B. Salvato, Mitch Provance 2009-5-27 36951 Los Angeles San Gabriel Valley, confluence of San Gabriel River and Walnut Creek, between El Monte and Baldwin Park, S of I-10 Fwy and north of Valley Blvd, W of I-605 Fwy, under SCE powerlines 88 Comment
  UCR209303  Polygonum hydropiperoides A. C. Sanders, T. B. Salvato, Mitch Provance 2009-5-26 36939 Los Angeles San Gabriel Valley, San Gabriel River between Bassett and South El Monte, from Hwy 60 crossing to above confluence with San Jose Creek, vicinity of Thienes Ave. public access to San Gab. Riv. greenway, along the Edison powerlines 71 Comment
  UCR209312  Polygonum hydropiperoides A. C. Sanders 2009-11-6 37218 Los Angeles South Coast, Madrona Marsh, Torrance 24 Comment
  UCR210024  Polygonum hydropiperoides R. G. Swinney 2008-12-2 9905 Los Angeles San Gabriel Mtns., mouth of San Gabriel Canyon between Foothill Blvd. and the I-210 Fwy, from main river channel to 300 m east 177 Comment
  UCR210187  Polygonum hydropiperoides R. G. Swinney 2008-10-22 9663 Los Angeles San Gabriel Mtns., Azusa, mouth of San Gabriel Canyon, 0.5 mi. upstream from entrance of Old San Gabriel Canyon Rd. at El Encanto 244 Comment
  UCR210362  Polygonum hydropiperoides T. B. Salvato, Billy Deane 2006-10-16 1927 Orange South Coast, Irvine, San Diego Creek flood control channel, between Michelson Drive and the 405 FWY 12 Comment
  UCR210493  Polygonum hydropiperoides R. G. Swinney 2008-11-30 9862 Los Angeles San Gabriel Mtns., Azusa, San Gabriel River Channel, 1.2 mi. north of Foothill Blvd. at mouth of Fish Canyon 204 Comment
  UCR229175  Polygonum hydropiperoides Dan S. Cooper 2011-8-30 s.n. Los Angeles South Coast, Madrona Marsh, Torrance 24 Comment
  UCR232641  Polygonum hydropiperoides George K. Helmkamp, E. A. Helmkamp 2011-10-13 18410 El Dorado Northern Sierra Nevada Mountains Foothills, Forebay Road, 8.1 miles northwest of Pollock Pines at the south side of the bridge over the South Fork American River 611 Comment
  UCR241972  Polygonum hydropiperoides George K. Helmkamp, E. A. Helmkamp 2012-9-7 19775 Amador Northern Sierra Nevada Mountains Foothills, along CA-49 in Plymouth; 0.1 mile south of its junction with Fiddletown Rd./Plymouth-Shenandoah Rd. 303 Comment
  UCR246494  Polygonum hydropiperoides Dan S. Cooper 2011-7-23 711- 90 Los Angeles South Coast, Madrona Marsh, Torrance 24 Comment
  UCR271535  Polygonum hydropiperoides R. G. Swinney 2011-11-3 15979 Los Angeles San Gabriel Mountains, Little Santa Anita Canyon, 'First Water', 1.7 miles up canyon from Mt. Wilson Trailhead, north of Sierra Madre 622 Comment
  UCR278901  Polygonum hydropiperoides Mitch Provance 2012-11-10 17604 Riverside San Bernardino Valley, Riverside, Springbrook Creek (remnant) Fairmont Park, between the east side of Lake Evans and the west side of Market St. 245 Comment
  UCR66557  Polygonum hydropiperoides I. M. Johnston 1916-1 94 San Bernardino San Gabriel Valley, Red Hill east of Upland 427 Comment
  UCR67000  Polygonum hydropiperoides S. J. Myers 1990-12-5 s.n. Riverside Santa Ana River, Louis Rubidoux Nature Center, along drainage that connects to Sunnyslope Channel, and to the confluence with the Santa Ana River 213 Comment
  UCR72815  Polygonum hydropiperoides A. C. Sanders 1992-8-23 12467 San Bernardino San Bernardino Mtns., Oak Glen, Riley's Farm on E side of Oak Glen Road c. 2 mi above Wildwood Canyon Road 1372 Comment
  CDA2781  Polygonum hydropiperoides Jerome Dunnicliff 1979-10-1 Kings 14th and Iona Avenues, southwest of Armona. 0 Comment
  CDA2782  Polygonum hydropiperoides J. B. Gianelli 1972-10-15 San Joaquin South bank of Bear Creek, 100 yards south of Airport Way, Stockton. 0 Comment
  POM156152  Polygonum hydropiperoides L. R. Abrams 1904-9-2 4186 Los Angeles Los Angeles River. Comment
  POM196320  Polygonum hydropiperoides E. E. Stanford 1929-10-25 1176 San Joaquin Near Stockton Comment
  POM312910  Polygonum hydropiperoides H. L. Mason 1928-9-30 4971 San Joaquin San Joaquin Delta near Holt. Comment
  POM312911  Polygonum hydropiperoides S. Galen Smith, Malcolm A. Nobs 1949-9-9 1857 a Lake Marshy stream bank at Scott Creek, Bridge 1431 NW end of Clear Lake Comment
  POM50451  Polygonum hydropiperoides L. R. Abrams 1901-08 2187 Los Angeles Ballona Creek. Comment
  RSA161326  Polygonum hydropiperoides Peter H. Raven 1961-8-27 16614 Merced Along Merced River near bridge below Snelling. Comment
  RSA234545  Polygonum hydropiperoides Peter Rubtzoff 1958-8-31 3954 Sonoma Atascadero Creek Marsh. Comment
  RSA234546  Polygonum hydropiperoides Peter Rubtzoff 1955-8-27 2099 Sonoma Bennett Mtn Lake. Comment
  RSA2441  Polygonum hydropiperoides J. W. Blankinship 1928-9-17 s.n. Lake Lakeport. Comment
  RSA30998  Polygonum hydropiperoides R. C. Bacigalupi, I. L. Wiggins, Roxana S. Ferris 1941-7-29 2688 Fresno Alkaline pools, 2 miles W of Tranquility jct on Hwy 180 Comment
  RSA44348  Polygonum hydropiperoides W. I. Follett 1948-10-29 s.n. Kings Kings River 7 miles N of Hanford Comment
  RSA653385  Polygonum hydropiperoides LeRoy Gross 2000-8-25 262 Los Angeles Big Tujunga Wash/ Verdugo Mountains: Orcas Park, entered from Foothill Blvd onto Orcas Ave. Hiked west from park, heading toward Hansen Dam. 325 Comment
  RSA81706  Polygonum hydropiperoides Roxana S. Ferris, Rimo Bacigalupi 1951-8-24 12435 Fresno Edge of ditch on General Grant Grove Hwy just E of Centerville Comment
  RSA94326  Polygonum hydropiperoides Peter Rubtzoff 1951-9-2 711 Sonoma N of the Lower marsh, in the creek Comment
  RSA94327  Polygonum hydropiperoides Peter Rubtzoff 1951-7-1 349 Sonoma Margin of Creek at Hwy 12, SE of Forestville Comment
  RSA97519  Polygonum hydropiperoides Beecher Crampton 1954-8-3 2229 Sacramento Along the road to Franklin, 5 miles S of Sacramento, Sacramento County Comment
  SEINET10479646  Polygonum hydropiperoides Lowell Ahart 1991-9-14 Ahart 6715 Butte On the sides of a large reservoir, Joie Osgood Ranch, about 2 miles east of Honcut. Valley Grassland. T17N R4E S/C/S14. 46 Comment
  SEINET10479647  Polygonum hydropiperoides Lowell Ahart 1991-9-14 Ahart 6716 Butte On the sides of a large reservoir, Joie Osgood Ranch, about 2 miles east of Honcut. Valley Grassland. T17N R4E S/C/S14. 46 Comment
  SEINET11933017  Polygonum hydropiperoides W. Knight, Knight, I. 1983-1 4882 Lake From pond section of Tilden Botanic Garden, in Contra Costa Co. Originally collected in 1982 at 305 Comment
  UC1101168  Polygonum hydropiperoides Malcolm A. Nobs and S. Galen Smith 1949-8-19 1426 Plumas on Hwy 89 2 mi s Crescent Mills (pond in river, s end of valley); Indian Valley Comment
  UC1101176  Polygonum hydropiperoides Herbert L. Mason August 1930 5721 Lake Clear Lake; along shores Comment
  UC1176914  Polygonum hydropiperoides John Thomas Howell 1945-10-14 Marin Olema Meadows Comment
  GH36704  Polygonum hydropiperoides var. asperifolium J. C. Nevin 1904-1-1 2 Unknown East Los Angeles Comment
  RSA0042551  Polygonum hydropiperoides var. asperifolium Samuel Bonsal Parish 1910-9-10 5099 San Bernardino Near San Bernardino. 304 Comment
  RSA65870  Polygonum hydropiperoides var. asperifolium F. W. Peirson 1923-1-21 1792 Los Angeles Pond north of East Lake Park, Los Angeles. Comment
  SEINET10937606  Polygonum hydropiperoides var. asperifolium Mary Susan Taylor 1978-9-8 Taylor 1883 Butte Along flood control slough, ca. 4 mi N of Chico, along Hwy 99. 61 Comment



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