Search Results — 485 specimen records retrieved (306 records with coordinates)
Results for search: Scientific name=Polygonum hydropiper (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/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC258010  Persicaria hydropiper Peter Rubtzoff 1973-8-20 7223 Sonoma Sonoma Creek bottom near Agua Caliente Road crossing west of Agua Caliente. Comment
  CAS-BOT-BC413698  Persicaria hydropiper John Thomas Howell 1936-8-25 12779 Trinity Near Trinity Center Comment
  CAS-BOT-BC413712  Persicaria hydropiper Carl D. Duncan 1920-9-22 s.n. Humboldt Hoopa Valley Comment
  CAS-BOT-BC413714  Persicaria hydropiper Malcom A. Nobs; S. Galen Smith 1949-9-2 1750 Inyo On Pine Creek Road, 2 miles west of Highway 395, 13.5 miles north of Bishop Comment
  CAS-BOT-BC413716  Persicaria hydropiper Peter H. Raven 1953-8-29 6231 Inyo N. end of Bishop Comment
  CDA42946  Persicaria hydropiper L. Ahart 2012-10-28 18522 Butte On the south side of Big Chico Creek, about 50 yards east of Table 5, west of Cedar Grove, Lower Bidwell Park, Chico. Comment
  CHSC109766  Persicaria hydropiper Lowell Ahart 2012-10-28 18522 Butte About 50 yards east of Table 5, west of Cedar Grove, Lower Bidwell Park, Chico. 68 Comment
  CHSC30868  Persicaria hydropiper J. D. Jokerst 1980-7-18 997 Butte Top of North Table Mt., ca 100 m NW of the jct. Cherokee Rd. and the east edge of mt. Comment
  CHSC31763  Persicaria hydropiper L. Ahart 1977-9-20 1582 Butte Peter Ahart Ranch, Honcut, along edges of North Honcut Creek. 50 Comment
  CHSC34192  Persicaria hydropiper L. Ahart 1981-9-19 3177 Butte Along edge of the road just a few feet n of the Arch Rock Tunnel, on Hwy 70, ca. 10 mi s of Storrie. 550 Comment
  CHSC34304  Persicaria hydropiper L. Ahart 1981-9-6 3069 Plumas On a sand bar along Indian Creek, ca. 0.5 mi s w of the jct of Hwy 89 and Arlington Rd, ca. 1.5 mi sw of Crescent Mills. 1200 Comment
  CHSC37071  Persicaria hydropiper L. Ahart 1982-10-6 3846 Butte Peter Ahart Ranch, ca. 3 mi ne of Honcut. Along edge of North Honcut Creek. 50 Comment
  CHSC37113  Persicaria hydropiper L. Ahart; M. S. Taylor 1982-10-11 3864 Butte Along edges of large duck pond, ca. 0.1 mi w of Graylodge HQ, Graylodge Wildlife Refuge, ca. 12 mi sw of Gridley. 35 Comment
  CHSC37256  Persicaria hydropiper L. Ahart 1982-8-22 3746 Butte Along edge of North Honcut Creek, Peter Ahart Ranch, ca. 1 mi n and 3 mi e of Honcut. 50 Comment
  CHSC38617  Persicaria hydropiper Vernon Oswald 1983-8-19 1012 Butte Upper Bidwell Park, Chico, in Lindo Channel ca. 100 ft upstream from the flood-control gates. 79 Comment
  CHSC40618  Persicaria hydropiper Lowell Ahart 1985-10-19 5210 Sutter On the sides of the pond, about 1/8 mile southeast of the Dean Cabin, Dean Ranch, Sutter Buttes. 274 Comment
  CHSC40909  Persicaria hydropiper Lowell Ahart 1985-11-7 5234 Butte About 80 feet below the high water line of Lake Oroville, on the bottom of the South Fork of the Feather River, about 300 yards north-west of the Ponderosa Dam. 277 Comment
  CHSC42730  Persicaria hydropiper Lowell Ahart 1987-5-27 5716 Butte On a sand bar along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  CHSC43247  Persicaria hydropiper Lowell Ahart 1987-10-22 5921 Butte Along a drain ditch, along Oroville Chico Highway (149), 1/10 mile north-west of Highway 70. 76 Comment
  CHSC45466  Persicaria hydropiper Lowell Ahart 1983-9-17 4437 Butte On the sides of a deep wash, about 1/4 mile south-east of Stirling City. 1097 Comment
  CHSC47471  Persicaria hydropiper Lowell Ahart 1989-11-12 6402 Butte On the bottom of a shallow wash, in the borrow area, about 1/4 mile south of the Feather River, about 4/10 mile west of Pacific Heights Road, about 4 1/2 miles south-west of Oroville. 30 Comment
  CHSC50681  Persicaria hydropiper Lowell Ahart 1990-6-16 6521 Butte Growing on wet mud along McCabe Creek, below the high water line at Lake Oroville, about 1/2 mile south-west of the Enterprise Bridge across Lake Oroville. 243 Comment
  CHSC50682  Persicaria hydropiper Lowell Ahart 1990-5-25 6493 Butte On the sides of a small stream, below the high water line of Lake Oroville, east of the Enterprise Boat Launch Area, about 1/8 mile north-west of the Enterprise Bridge across Lake Oroville. 259 Comment
  CHSC55252  Persicaria hydropiper Lowell Ahart 1991-9-14 6714 Butte On the sides of a large reservoir, Joie Osgood Ranch, about 2 miles east of Honcut. 45 Comment
  CHSC61990  Persicaria hydropiper Vernon H. Oswald 1993-9-20 5935 Glenn Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, Wetlands Hiking Trail along the W boundary N of the main entrance (Cell1, Tract 11). 30 Comment
  CHSC66202  Persicaria hydropiper Vernon H. Oswald; Lowell Ahart 1996-6-3 7724 Tehama Hog Lake Plateau BLM parcel along Hwy. 36 NE of Red Bluff. Growing on a gravel bar on the E side of Paynes Creek just upstream from the Sacramento River. 91 Comment
  CHSC66897  Persicaria hydropiper Vernon H. Oswald 1996-10-22 8301 Butte Oroville Wildlife Area on the NW side of the Feather River just upstream from the outlet of Thermalito Afterbay. 33 Comment
  CHSC67279  Persicaria hydropiper James D. Jokerst; Jeri Donovan 1981-9-30 1499 Tehama Wurlitzer Ranch on Pine Creek, 1.0 mi E of Meridian Rd., ca. 0.5 mi E of Bell Ranch on S bank of Pine Creek. Comment
  CHSC72337  Persicaria hydropiper Vernon H. Oswald 1998-10-19 9667 Solano Grizzly Island Rd. 5.5 mi south of Hwy. 12 near Suisun City, along the fisherman's trail on the north side of Montezuma Slough west of the bridge. 0 Comment
  CHSC73980  Persicaria hydropiper B. Castro 1995-9-10 612 Butte Ca 2 air mi N of Feather Falls, towards western end of Watson Ridge, in meadow at the old Watson Cabin site, north of USFS Rd 21N25. In upper third of meadow. 1109 Comment
  CHSC76288  Persicaria hydropiper Lowell Ahart 1999-9-21 8271 Butte Large disturbed area along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  CHSC76403  Persicaria hydropiper Lowell Ahart; Vernon H. Oswald 1999-10-3 8293 Butte Large disturbed area along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  CHSC98412  Persicaria hydropiper L. Ahart 1983-9-17 4437 Butte 1/4 mi se of Stirling City. 1100 Comment
  JEPS120019  Persicaria hydropiper Lowell Ahart 2012-10-28 18522 Butte On the south side of Big Chico Creek, about 50 yards east of Table 5, west of Cedar Grove, Lower Bidwell Park, Chico. Comment
  SD131785  Persicaria hydropiper L. R. Heckard, P. Rubtzoff 1971-9-15 2806 San Joaquin Along Airport Way, 2.6 miles south of junction of West Ripon road (ca. 7 miles southwest of Manteca), edge of muddy irrigation ditch Comment
  SD236379  Persicaria hydropiper G. K. Helmkamp, E. A. Helmkamp 2006-10-10 11528 Yuba Northern Sierra Nevada Mountains Foothills: along Hwy Ca-49 just north of Nevaday county line at the Middle Yuba River Bridge. 451 Comment
  SD241150  Persicaria hydropiper A. C. Sanders 2009-6-1 37065 Los Angeles San Gabariel Valley: Rio Hondo in Whittier Narrows area, west of RosemeadBlvd. (Hwy 19) under SCE powerlines, beyond a tree nursery (El Monte 7.5'Q) 63 Comment
  SEINET3924333  Persicaria hydropiper George K. Helmkamp, E. A. Helmkamp 2007-10-28 13121 Sutter Sacramento Valley: along Nicolaus Road, 0.1 mile west of the Placer County line.; 0 12 Comment
  SEINET3924776  Persicaria hydropiper Louis C. Wheeler 1934-9-20 3287 Siskiyou Lumgrey Creek.; 0 671 Comment
  UCD105089  Persicaria hydropiper K. M. Meyer; A. Townesmith 2007-9-24 251 Santa Clara Henry W. Coe State Park, SW corner of park, Hunting Hollow entrance and parking area. 253 Comment
  UCD150005  Persicaria hydropiper G. Ledyard Stebbins 1976-9-25 76263 El Dorado At south side of American River, at junction of North and Middle Fork, immediately east of State Highway 49. (Exact location unknown. Coordinates estimated by label maker.) 176 Comment
  UCD165109  Persicaria hydropiper Peter Rubtzoff 1973-9-9 7310 Sonoma Kenwood Marsh. Comment
  UCD166044  Persicaria hydropiper Daniel M. McNair 2016-8-2 2196 El Dorado west side of Tahoe Basin at D.L. Bliss State Park. 1897 Comment
  UCD54152  Persicaria hydropiper Molly Enloe 1992-9-20 9- 12 Sacramento Cosumnes River Preserve Plant Inventory. Area 9: bounded by RR tracks on W, seasonally flooded field and property line on N, Willow Slough and dry portion to road on S. 2 Comment
  UCD54153  Persicaria hydropiper Molly Enloe 1992-9-20 9- 7 Sacramento Cosumnes River Preserve Plant Inventory. Comment
  UCD82363  Persicaria hydropiper M. Tu 1998-11-5 128 Sacramento Cosumnes River Preserve Plant Inventory - Seed Bank Plants. 1 Comment
  UCD99058  Persicaria hydropiper Frederica Bowcutt 1997-7-18 2174 Sonoma Sugarloaf Ridge State Park. About 50 air miles N of San Francisco, 10 air miles E of Santa Rosa, 2.5 air miles NE of Kenwood and 18 air miles NW of Napa. Just south of midpoint between Mt. Hood and Red Mountain. Road on ridge West of Bear Ck. 365 Comment
  UCD99060  Persicaria hydropiper Frederica Bowcutt 1997-7-18 2174 Sonoma Sugarloaf Ridge State Park. About 50 air miles N of San Francisco, 10 air miles E of Santa Rosa, 2.5 air miles NE of Kenwood and 18 air miles NW of Napa. Just south of midpoint between Mt. Hood and Red Mountain. Road on ridge West of Bear Ck. 365 Comment
  UCD99066  Persicaria hydropiper Beecher Crampton 1964-8-26 7179 Shasta Castle Crag, 3 miles s. of Dunsmuir, Sacramento River. Comment
  UCD99077  Persicaria hydropiper Malcolm A. Nobs; S. Galen Smith 1949-9-2 1750 Inyo 13.5 miles N of Bishop, 2 miles W of Highway 395, on Pine Creek Road. Comment
  CAS-BOT-BC258011  Persicaria hydropiper Peter Rubtzoff 1973-8-15 7210 Sonoma Russian River at Squaw Rock, 6 miles south of Hopland. Comment
  CAS-BOT-BC258014  Persicaria hydropiper Peter Rubtzoff 1973-9-9 7310 Sonoma Kenwood Marsh. Comment
  CAS-BOT-BC413688  Persicaria hydropiper Geo. Hansen 1893-7-1 754 Amador New York Falls 609 Comment
  CAS-BOT-BC413689  Persicaria hydropiper W. B. Andahl 1966-9-12 s.n. Calaveras L. Sandoz prop., Wilseyville Comment
  CAS-BOT-BC413690  Persicaria hydropiper John Thomas Howell 1954-9-6 30086 Calaveras 3 miles se. of Angels Camp Comment
  CAS-BOT-BC413691  Persicaria hydropiper Peter H. Raven 1954-9-2 8115 Lake Bed of St. Helena Creek at Mirabel Park, 4.8 mi. s. of Middletown Comment
  CAS-BOT-BC413692  Persicaria hydropiper A. E. LaRose 1974-9-25 s.n. Marin Pasture on Waldo Giacomini property, Point Reyes Station Comment
  CAS-BOT-BC413693  Persicaria hydropiper Catherine Best 1985-9-15 1146 Placer Sugar Pine Reservoir. About 6 miles north of Fosresthill 1158 Comment
  CAS-BOT-BC413694  Persicaria hydropiper Peter Rubtzoff 1970-9-15 6388 Sacramento Off west side of Hwy. 99, 1 mi. north of Elk Grove Blvd. crossing. Ca. 2 mi. nw. of Elk Grove Comment
  CAS-BOT-BC413695  Persicaria hydropiper Lowell Ahart 1985-10-19 5210 Sutter About 1/8 mile south-east of the Dean Cabin, Dean Ranch, Sutter Buttes 274 Comment
  CAS-BOT-BC413696  Persicaria hydropiper John Thomas Howell 1981-10-13 54621 Sutter Bobelaine Audubon Sanctuary, Feather River at mouth of Bear River 9 Comment
  CAS-BOT-BC413697  Persicaria hydropiper Mrs. H. C. Cantelow 1936-8-23 1690 Trinity Scott Ranch, 3 mi. S. of Trinity Center, nr. irrigation ditch Comment
  CAS-BOT-BC413699  Persicaria hydropiper Roxana Stinchfield 1915-8-5 21 Tuolumne Bear Creek. Vicinity of Rawhide Comment
  CAS-BOT-BC413700  Persicaria hydropiper John Thomas Howell 1961-9-22 36770 Butte North Fork of Feather River, 10 miles from Oroville Comment
  CAS-BOT-BC413701  Persicaria hydropiper John Thomas Howell 1959-9-20 34644 Butte Eastern outskirts of Oroville 60 Comment
  CAS-BOT-BC413702  Persicaria hydropiper Lowell Ahart 1985-11-7 5234 Butte On the bottom of the South Fork of the Feather River, about 300 yards north-west of the Ponderosa Dam. Near Ponderosa Dam, Lake Oroville 277 Comment
  CAS-BOT-BC413703  Persicaria hydropiper Lowell Ahart 1983-9-17 4437 Butte About 1/4 mile south-east of Stirling City 1100 Comment
  CAS-BOT-BC413704  Persicaria hydropiper Lowell Ahart 1987-10-22 5921 Butte Along Oroville Chico Highway (149), 1/10 mile north-west of Highway 70 76 Comment
  CAS-BOT-BC413705  Persicaria hydropiper Lowell Ahart 1982-10-11 3864 Butte About 1/10 mile west of the Gray Lodge Headquarters, Gray Lodge, about 12 miles south-west of Gridley 35 Comment
  CAS-BOT-BC413706  Persicaria hydropiper Lowell Ahart 1982-10-6 3846 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-BC413707  Persicaria hydropiper Lowell Ahart 1981-9-19 3177 Butte Arch Rock Tunnel, Hwy. 70 550 Comment
  CAS-BOT-BC413708  Persicaria hydropiper G. L. Stebbins 1976-9-25 76263 El Dorado At south side of American River, at junction of North and Middle Fork, immediately east of State Highway 49 176 Comment
  CAS-BOT-BC413709  Persicaria hydropiper John Thomas Howell 1969-9-12 46081 El Dorado 1 mile west Forest Genetics station 762 Comment
  CAS-BOT-BC413710  Persicaria hydropiper John Thomas Howell 1976-10-29 52270 El Dorado Bottom of Folsom Lake at Brown's Ravine boat landing 121 Comment
  CAS-BOT-BC413711  Persicaria hydropiper Henry M. Pollard 1956-10-9 s.n. Humboldt Fig Tree Riffle at Woodson Mine, Klamath River, Orleans Comment
  CAS-BOT-BC413713  Persicaria hydropiper Malcom A. Nobs; S. Galen Smith 1949-8-11 1336 Humboldt Marsh at eastern shore of Stone Lagoon Comment
  CAS-BOT-BC413715  Persicaria hydropiper Malcom A. Nobs; S. Galen Smith 1949-9-2 1750 Inyo On Pine Creek road, 2 miles west of Highway 395, 13.5 miles north of Bishop Comment
  CAS-BOT-BC413717  Persicaria hydropiper Peter Rubtzoff 1973-8-15 7210 Mendocino Russian River at Squaw Rock, 6 miles south of Hopland Comment
  CAS-BOT-BC413718  Persicaria hydropiper Gladys L. Smith 1983-9-7 8329 Mendocino At edge of Mill Cr. at first bridge, Reeves Canyon north of Ukiah. 233 Comment
  CAS-BOT-BC413719  Persicaria hydropiper Clare R. Wheeler 1985-9-8 3764 Mendocino Russian River. Ca. 2 miles upriver from Preston Bridge 103 Comment
  CAS-BOT-BC413720  Persicaria hydropiper Clare R. Wheeler 1982-9-27 3290 Mendocino Rancheria Creek. Hwy. 128 & Fish Rock Road. 5 miles NW of Yorkville 243 Comment
  CAS-BOT-BC413721  Persicaria hydropiper Peter H. Raven 1954-8-27 7983 Nevada W. of Greenhorn Creek 914 Comment
  CAS-BOT-BC413722  Persicaria hydropiper Peter H. Raven 1954-8-28 8038 Nevada Flood plain of Greenhorn Creek 762 Comment
  CAS-BOT-BC413723  Persicaria hydropiper Peter H. Raven 1954-8-30 8065 Nevada Near Red Dog 792 Comment
  CAS-BOT-BC413724  Persicaria hydropiper Gordon H. True 1965-10-6 2673 Nevada East end of Omega Mine Road at Hiway 20 about 2 miles west of Bear Valley 1584 Comment
  CAS-BOT-BC413725  Persicaria hydropiper Gordon H. True 1968-8-26 4585 Nevada Taylor crossing on Bear River ca. 2.5 miles west of Colfax, just west of Placer County line Comment
  CAS-BOT-BC413726  Persicaria hydropiper Gordon H. True 1961-8-12 150 Nevada G. H. True Ranch, 7 miles south-west of Grass Valley on McCourtney Road 548 Comment
  CAS-BOT-BC413727  Persicaria hydropiper Gordon H. True 1969-10-23 5162 Nevada Wolf Creek at bridge ca. 1 mi. west of Higgins' Corner 426 Comment
  CAS-BOT-BC413728  Persicaria hydropiper Gordon H. True; J. T. Howell 1965-8-25 2549 Nevada Scotts Flat Reservoir on Deer Creek about 5 miles east of Nevada City 944 Comment
  CAS-BOT-BC413729  Persicaria hydropiper Walter Knight; Irja Knight; John Thomas Howell 1966-7-28 1459 Plumas Butterfly Botanical Area and Vicinity. In bed of Spanish Creek near confluence of Butterfly Creek 883 Comment
  CAS-BOT-BC413730  Persicaria hydropiper John Thomas Howell 1961-9-23 36847 Plumas Indian Valley 1082 Comment
  CAS-BOT-BC413731  Persicaria hydropiper John Thomas Howell 1959-9-26 35071 Plumas Feather River Canyon. Ca. 1.5 mi. W. of Belden 682 Comment
  CAS-BOT-BC413732  Persicaria hydropiper John Thomas Howell 1951-8-19 28164 Plumas Near Belden 670 Comment
  CAS-BOT-BC413733  Persicaria hydropiper Lowell Ahart 1981-9-6 3069 Plumas 1 1/2 miles SW of Crescent Mills 1200 Comment
  CAS-BOT-BC413734  Persicaria hydropiper A. A. Heller 1916-7-19 12455 Shasta 5 miles south of Redding Comment
  CAS-BOT-BC413735  Persicaria hydropiper A. A. Heller 1916-7-19 12455 Shasta 5 miles south of Redding Comment
  CAS-BOT-BC413736  Persicaria hydropiper Malcom A. Nobs; S. Galen Smith 1949-7-19 1027 Shasta Junction of Pit River and Hat Creek, Highway 299 Comment
  CAS-BOT-BC413737  Persicaria hydropiper Louis C. Wheeler 1934-9-20 3287 Siskiyou Lumgrey Creek, Siskiyou Mts. 670 Comment
  CAS-BOT-BC413738  Persicaria hydropiper Louis C. Wheeler 1934-9-20 3287 Siskiyou Klamath National Forest, Lumgrey Cr. 670 Comment
  CAS-BOT-BC413739  Persicaria hydropiper Louis C. Wheeler 1934-9-20 3287 Siskiyou Klamath National Forest, Lumgrey Cr. 670 Comment
  CAS-BOT-BC413740  Persicaria hydropiper John Thomas Howell 1932-9-18 10779 Sonoma Bank of slough draining Kenwood Marsh Comment
  CAS-BOT-BC413741  Persicaria hydropiper John Thomas Howell 1932-9-18 10779 Sonoma Bank of slough draining Kenwood Marsh Comment
  CAS-BOT-BC413742  Persicaria hydropiper Peter Rubtzoff 1970-9-17 6390 Sonoma Laguna de Santa Rosa north of Sebastopol, nr. Occidental Rd. crossing Comment
  CAS-BOT-BC413743  Persicaria hydropiper Peter Rubtzoff 1968-8-31 5951 Sonoma Russian River bottom at Forest Hills, 5.5 mi. east of Guerneville Comment
  CAS-BOT-BC413744  Persicaria hydropiper Peter Rubtzoff 1968-8-18 5930 Sonoma Laguna de Santa Rosa east of Graton, betw. Occidental and Guerneville roads Comment
  CAS-BOT-BC413745  Persicaria hydropiper Peter Rubtzoff 1966-9-25 5821 Sonoma Laguna de Santa Rosa east of Graton, betw. Occidental and Guerneville roads Comment
  CAS-BOT-BC413746  Persicaria hydropiper Peter Rubtzoff 1966-6-5 s.n. Sonoma Laguna de Santa Rosa east of Graton, betw. Occidental and Guerneville rds. Comment
  HSC86712  Persicaria hydropiper Clare R. Wheeler 1982-9-27 3290 Mendocino Rancheria Creek, Hwy. 128 and Fish Rock Rd., 5 mi. NW of Yorkville 244 Comment
  HSC86713  Persicaria hydropiper Clare R. Wheeler 1985-9-8 3764 Mendocino Russian River 2 mi. up river from Preston Bridge 103 Comment
  SBBG41737  Persicaria hydropiper P. Rubtzoff 1970-9-15 6388 Sacramento W side of Hwy 99, ca. 3 mi NW of Elk Grove, 1 mi N of Elk Grove Blvd crossing Comment
  SEINET12886980 Image available Persicaria hydropiper S. F. Blake 1910-1 679 Unknown Comment
  SEINET12886981 Image available Persicaria hydropiper A. A. Heller 1916-1 12455 Unknown Comment
  UCD143812  Persicaria hydropiper Beecher Crampton 1983-9-22 s.n. Yolo UC Davis. Comment
  UCD18458  Persicaria hydropiper Monte Bell, FA 1988-10-1 s.n. Shasta Shasta County. Comment
  UCD99057  Persicaria hydropiper Perry S. Allen 1969-7-24 473 Stanislaus A few hundred feet upstream from the mouth of Lower Dominici Creek, southwest of La Grange. Comment
  UCD99063  Persicaria hydropiper Beecher Crampton 1961-10-31 6075 Sacramento 1 mile south of Fair Oaks along the American River. Comment
  UCD99070  Persicaria hydropiper G. F. Hrusa 1992-8-26 9548 San Joaquin Caswell Memorial State Park, Oxbow Lake. Comment
  UCD99074  Persicaria hydropiper Malcolm A. Nobs; S. Galen Smith 1949-7-19 1027 Shasta Shasta County.: At junction of Pitt River and Hat Creek at Highway 299. Comment
  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
  CDA11697  Polygonum hydropiper G. F. Hrusa 1990-10-4 8247 Sacramento Natoma Unit-Folsom Lake State Rec. Area; Banks of Willow Creek at the Willow Creek vehicle access. Comment
  CDA11698  Polygonum hydropiper G. F. Hrusa 1990-10-4 8249 Sacramento Natoma Unit-Folsom Lake State Rec. Area; Banks of Willow Creek at the Willow Creek vehicle access. Comment
  CDA12488  Polygonum hydropiper G. F. Hrusa 1990-9-4 8208 Sacramento Natoma Unit-Folsom Lake State Rec. Area; Upper end of estuary of first canyon to S of American River Bluffs. Comment
  CDA2786  Polygonum hydropiper L. Ahart, J. Dittes 2003-9-17 10589 Tehama On the south side of Deer Creek, about 400 yards east of Highway 99, about 5 miles (air) southeast of Los Molinos. Comment
  CDA30222  Polygonum hydropiper M. K. Beyers, I. Shepardson 2009-9-12 234 Mendocino Along the Eel River, off of Highway 101 and just west of State Route 271. 0 Comment
  CDA6938  Polygonum hydropiper G. K. Helmkamp, E. A. Helmkamp 2006-10-1 11528 Yuba Northern Sierra Nevada Mountain Foothills; Along Highway CA-49 just north of the Nevada County line at the Middle Yuba River bridge. Comment
  JEPS101809  Polygonum hydropiper Dean W. Taylor 1999-9-16 17379 Madera San Joaquin River 0.5 miles west (downstream) from Skaggs Bridge (Highway 145 10 miles S of Madera) 64 Comment
  JEPS50605  Polygonum hydropiper Joseph P. Tracy 1926-9-6 7791 Trinity 3 mi e South Fork; Northern Coast Ranges, Trinity River, Sharber Slough 182 Comment
  JEPS50607  Polygonum hydropiper W. L. Jepson 1894-11-5 Napa towards Battle Mt. (near St. Helena) Comment
  JEPS50610  Polygonum hydropiper W. L. Jepson 1928-8-28 13319 Fresno between Lone Willow road sta. and Whites Bridge; Four-mile Slough 57 Comment
  JEPS66413  Polygonum hydropiper L. R. Heckard and P. Rubtzoff 1971-7-31 2674 Tehama land-locked lagoon off Sacramento River (just ne of Red Bluff) Comment
  JEPS74997  Polygonum hydropiper L. R. Heckard and P. Rubtzoff 1971-9-15 2806 San Joaquin along Airport Way 2.6 mi s junction of West Ripon road (ca 7 mi sw of Manteca) Comment
  JEPS74998  Polygonum hydropiper L. R. Heckard and P. Rubtzoff 1971-9-15 2806 San Joaquin along Airport Way 2.6 mi s junction of West Ripon road (ca 7 mi sw of Manteca) Comment
  JEPS95813  Polygonum hydropiper Lowell Ahart 1999-10-3 8293 Butte northwest of Parrott Landing; about 1 mile southeast of Ord Ferry; about 2 miles southeast of Ordbend; about 12 miles (air) southwest of Chico 32 Comment
  JEPS95814  Polygonum hydropiper Lowell Ahart 1999-9-21 8271 Butte northwest of Parrott Landing; about 1 mile southeast of Ord Ferry; about 2 miles southeast of Ordbend; about 12 miles (air) southwest of Chico 32 Comment
  JEPS96715  Polygonum hydropiper Dean W. Taylor 1997-9-19 16238 Mariposa Yosemite Valley, Yosemite National park, ruderal disturbed margin of paths and parking area in employee housing tents on SE edge of Yosemite Village area 1188 Comment
  RSA226853  Polygonum hydropiper Mary DeDecker 1970-8-21 2565 Inyo Sierra Nevada: Parker Ranch; South Fork of Oak Creek. 1555 Comment
  RSA234469  Polygonum hydropiper Peter Rubtzoff 1966-9-25 5821 Sonoma Laguna de Santa Rosa E of Graton, betw. Occidental and Guerneville Roads. Comment
  RSA466395  Polygonum hydropiper Wm. Martin 1971-9-8 20046 Inyo 5 miles NW of Bishop on Hwy 395. Comment
  RSA466396  Polygonum hydropiper Wm. Martin 1971-9-10 20225 Placer 1 mile east of Weimar on Hwy 80 610 Comment
  RSA618451  Polygonum hydropiper Mary DeDecker 1970-8-21 2565 Inyo Sierra Nevada: Parker Ranch; South Fork of Oak Creek, along streamlet. 1555 Comment
  RSA715234  Polygonum hydropiper George K. Helmkamp, E. A. Helmkamp 2005-9-12 9865 El Dorado Northern Sierra Nevada Foothills, E of Sacramento, Sly Park road (County Hwy E-16) 2 miles E of Pleasant Valley. 854 Comment
  RSA747208  Polygonum hydropiper K. M. Meyer, A. Townesmith 2007-9-24 251 Santa Clara Henry W. Coe State Park, SW corner of park, Hunting Hollow entrance and parking area. 253 Comment
  SEINET10853420  Polygonum hydropiper Karen M. Meyer, Andrew Townesmith 2007-9-24 Meyer 251 Santa Clara Henry W. Coe State Park, SW corner of park, Hunting Hollow entrance and parking area. 253 Comment
  SEINET4691499  Polygonum hydropiper Dan S. Cooper 2011-1 711 -90 Los Angeles South Coast: Madrona Marsh. Torrance 24 Comment
  UC1101180  Polygonum hydropiper Malcolm A. Nobs and S. Galen Smith 1949-9-2 1750 Inyo on Pine Creek road 2 mi w Highway 395 (13.5 mi n of Bishop) Comment
  UC1101182  Polygonum hydropiper Malcolm A. Nobs and S. Galen Smith 1949-8-22 1539 Placer Roseville; stream at sw city limits Comment
  UC1101183  Polygonum hydropiper Malcolm A. Nobs and S. Galen Smith 1949-8-22 1525 Nevada on Hwy 24 11 mi n Nevada-Placer County line (along creek); Cherry Creek Comment
  UC1192316  Polygonum hydropiper Malcolm A. Nobs and S. Galen Smith 1949-8-11 1336 Humboldt Stone Lagoon; marsh on e shore Comment
  UC1192346  Polygonum hydropiper Malcolm A. Nobs and S. Galen Smith 1949-7-19 1027 Shasta junction of river and Hat Creek (Hwy 299); Pit River Comment
  UC1283741  Polygonum hydropiper Beecher Crampton 1964-8-26 7179 Shasta Castle Crag Sacramento River Comment
  UC1299692  Polygonum hydropiper Freed W. Hoffman 1946-8-20 1264 Napa below Conn Lake Dam; North Coast Ranges Comment
  UC1509657  Polygonum hydropiper L. Ahart 1982-10-6 3846 Butte ca 3 mi ne Honcut; Peter Ahart Ranch, North Honcut Creek 50 Comment
  UC1509659  Polygonum hydropiper L. Ahart 1982-10-11 3864 Butte large duckpond ca 1/10 mi w Graylodge Wildlife Refuge (ca 12 mi sw of Gridley) 35 Comment
  UC153936  Polygonum hydropiper Geo. Hansen Aug 1895 754 Amador Irishtown Sequoia Gigantea Region 457 Comment
  UC1562373  Polygonum hydropiper Lowell Ahart 1990-6-16 6521 Butte along creek about 1/2 mi sw Enterprise Bridge across lake (below high-water line of lake); Lake Oroville, McCabe Creek 243 Comment
  UC1562376  Polygonum hydropiper Lowell Ahart 1990-5-25 6493 Butte about 1/8 mi nw Enterprise Bridge across lake (e of Enterprise Boat Launch Area, below high water line of lake); Lake Oroville 259 Comment
  UC1606435  Polygonum hydropiper Barbara Ertter 1993-11-8 12297 Tehama at Hwy 99 n Vina; Deer Creek Comment
Read comments
Jul 16 2009
  UC1965951  Polygonum hydropiper Alison Colwell, Dena Grossenbacher 2006-9-21 AC 06 -509 Tuolumne East side of pond on North side of the Tuolumne River, Poopenaut Valley. 1018 Comment
  UC302992  Polygonum hydropiper Joseph P. Tracy 1926-9-6 7792 Trinity Sharber Slough Northern Coast Ranges, Trinity River (on river 3 mi e of the South Fork) 182 Comment
  UC302993  Polygonum hydropiper Joseph P. Tracy 1926-9-6 7791 A Trinity Sharber Slough Northern Coast Ranges, Trinity River (on river 3 mi e of the South Fork) 182 Comment
  UC672982  Polygonum hydropiper Joseph P. Tracy 1927-10-8 8386 Humboldt Boyes Ranch Prairie Creek 91 Comment
  UC768464  Polygonum hydropiper R. F. Hoover 1937-8-24 2694 Tuolumne 2 mi e Tuolumne Comment
  UCD39000  Polygonum hydropiper Beecher Crampton 1961-10-31 6074 Sacramento 1 mile south of Fair Oaks along the American River. Comment
  UCD39152  Polygonum hydropiper Beecher Crampton 1964-8-26 7179 Shasta Castle Crag, 3 miles s. of Dusmuir, Sacramento River. Comment
  UCR123381  Polygonum hydropiper Lisa Kegarice 1993-6-22 s.n. San Joaquin Sacramento Valley, under the north side of the Orwood Trestle, Santa Fe Railway, 12 miles west of Stockton, between Bacon and Woodward Islands in the San Joaquin River delta between Old River and Middle River 0 Comment
  UCR170473  Polygonum hydropiper George K. Helmkamp, Elizabeth Helmkamp 2005-9-12 9865 El Dorado Northern Sierra Nevada Foothills, east of Sacramento; Sly Park Road (County Highway E-16), c. 2 mi east of Pleasant Valley 854 Comment
  UCR179302  Polygonum hydropiper George K. Helmkamp, E. A. Helmkamp 2006-10-10 11528 Yuba Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 49 just north of the Nevada County line at the Middle Yuba River bridge 451 Comment
  UCR185535  Polygonum hydropiper A. C. Sanders 2007-7-8 34304 Madera Sierra Nevada Mtns., Bass Lake, near Cedar Bluff Campground on the central west side of lake 1037 Comment
  UCR185540  Polygonum hydropiper A. C. Sanders 2007-7-8 34305 Madera Sierra Nevada Mtns., Bass Lake, near Cedar Bluff Campground on the central west side of lake 1037 Comment
  UCR259890  Polygonum hydropiper George K. Helmkamp, Elizabeth Helmkamp 2013-10-18 22442 Amador Sierra Nevada Mountains Foothills, Plymouth, at the junction of Mineral Street and Mill Street, near Hwy CA-49 329 Comment
  UCR280148  Polygonum hydropiper Peter Rubtzoff 1973-8-15 7210 Mendocino Russian River bottom at Squaw Rock, 6 miles south of Hopland 131 Comment
  UCR280149  Polygonum hydropiper Peter Rubtzoff 1973-8-20 7223 Sonoma Sonoma Creek bottom near Agua Caliente Road crossing west of Agua Caliente 38 Comment
  UCR36494  Polygonum hydropiper A. C. Sanders, J. Zabriskie 1984-6-18 5074 Sacramento American River NE of Sacramento, C.M. Goethe Park near Rancho Cordova 18 Comment
  YM-YOSE118624  Polygonum hydropiper Alison Colwell 2006-9-21 AC 06 -509 Tuolumne East side of pond on North side of the Tuolumne River, Poopenaut Valley. . 1018 Comment
  YM-YOSE118625  Polygonum hydropiper Alison Colwell 2006-9-21 AC 06 -509 Tuolumne East side of pond on North side of the Tuolumne River, Poopenaut Valley. . 1018 Comment
  CDA22799  Polygonum hydropiper J. F. Silva 1957-10-9 San Joaquin Escalon. 0 Comment
  CDA2785  Polygonum hydropiper J. F. Silva 1957-10-9 395 -57 San Joaquin Escalon. 0 Comment
  CDA2787  Polygonum hydropiper G. D. Barbe 1983-9-13 4099 El Dorado Vicinity of Finnon Reservoir, Rock Creek Road, northeast of Placerville. 0 Comment
  CDA2788  Polygonum hydropiper L. Ahart, Vernon Oswald 1999-10-3 8293 Butte Along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. Comment
  GH404959  Polygonum hydropiper L. Ahart & V. H. Oswald 1999-10-3 8293 Unknown east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ordbend, about 12 miles (air) southwest of Chico 32 Comment
  HREC711 Image available Polygonum hydropiper H. F. Heady 1952-8-25 426 Mendocino Pond Pasture - Hopland Field Station Comment
  JEPS50606  Polygonum hydropiper P. B. Kennedy 1921-7-13 Merced Clyne Field San Joaquin Valley, Santa Rita Island Comment
Read comments
Aug 18 2010
  JEPS50608  Polygonum hydropiper W. L. Jepson Sept. 1891 Sacramento Lower Sac. Comment
  NY412590  Polygonum hydropiper Collector unspecified s.n. Unknown Ross Landing Comment
  POM161060  Polygonum hydropiper Joseph P. Tracy 1926-9-6 7791 Trinity Sharber Slough on Trinity River 3 miles E of the S Fork. 183 Comment
  POM183305  Polygonum hydropiper J. T. Howell 1931-9-27 8118 Mendocino 3.5 miles N of Point Areua, Mendocino County Comment
  POM211807  Polygonum hydropiper Louis C. Wheeler 1934-9-20 3287 Siskiyou Lumgrey Creek, Siskiyou Mts. Mt. Diablo Mer. 671 Comment
  POM312908  Polygonum hydropiper Malcolm A. Nobs, S. Galen Smith 1949-7-19 1027 Shasta Jct of Pit River and Hat Creek, Hwy 299. Comment
  POM312909  Polygonum hydropiper S. Galen Smith, Malcolm A. Nobs 1949-8-29 1627 Tuolumne 1.5 miles W of Sonora ( Well fertilized by Sonora's sewer) Comment
  RSA128554  Polygonum hydropiper Peter H. Raven 1954-9-2 8115 Lassen Bed of St. Helena Creek at Mirabel Park, 4.8 miles S of Middletown Comment
  RSA128572  Polygonum hydropiper Peter H. Raven 1954-8-30 8065 Nevada A small pond along road, near Red Dog. 793 Comment
  RSA466397  Polygonum hydropiper E. E. Stanford 1927-9-17 699 San Joaquin Stockton Comment
  RSA466398  Polygonum hydropiper Wm. Martin 1971-9-19 20664 Tuolumne 15 miles south of the jct. of Hwy 49 and 108 on Hwy 49. Comment
  RSA488051  Polygonum hydropiper Claire R. Wheeler 1982-9-27 3290 Mendocino Rancheria Creek Hwy 128 and Fish Rock Road, 5 miles NW of Yorkville. 244 Comment
  RSA518661  Polygonum hydropiper L. R. Heckard 1971-7-31 26743 Tehama Damp mud of land locked lagoon off the Sacramento River just NE of Red Bluff. Comment
  RSA800607  Polygonum hydropiper Peter Rubtzoff 1973-8-15 7210 Sonoma Russian River at Squaw Rock, 6 mi south of Hopland. Comment
  SEINET10479466  Polygonum hydropiper Lowell Ahart 1983-9-17 Ahart 4437 Butte T24N R4E section 34. Ca. 1/4 mi se of Stirling City. Yellow Pine Forest; 1100 m. 1100 Comment
  SEINET10838763  Polygonum hydropiper Lowell Ahart 1985-10-19 Ahart 5210 Sutter Dean Ranch, Sutter Buttes. About 12 miles west of Marysville. Comment
  SEINET10937571  Polygonum hydropiper Lowell Ahart 1985-11-7 Ahart 5234 Butte Lake Oroville, on the north side of the South Fork of the Feather River, about 200 yards north-west of the Ponderosa Dam. Comment
  SEINET11930161  Polygonum hydropiper Unknown 1981-1 3069 Plumas On a sandbar along Indian Creek, about 1/2 mi SW of the intersection of Hwy 89 and 1097 Comment
  SEINET11934448  Polygonum hydropiper L. Ahart, Dean, M.; Sands, P. 1985-1 5210 Sutter Dean Ranch, Sutter Buttes About 12 mi W of Marysville. On pond sides about 1/8 mi SE from Dean Cabin 274 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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