Search Results — 314 specimen records retrieved (220 records with coordinates)
Results for search: Scientific name=Petrorhagia dubia (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/consortium/).
 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-BC183455  Petrorhagia dubia James R. Shevock 1982-5-6 9426 Tulare Along General's Highway, 2.5 miles north of Ash Mountain Park Headquarters near Potwisha Campground above Middle Fork Kaweah River 609 Comment
  CAS-BOT-BC183591  Petrorhagia dubia James R. Shevock 1982-4-24 9315 Tulare Along Marble Fork Trail north of Potwisha Campground 822 Comment
  CAS-BOT-BC251235  Petrorhagia dubia Peter Rubtzoff 1964-7-22 5423 Mendocino Navarro River bottom, 2 miles northwest of Philo, in Hendy Woods State Park. Comment
  CAS-BOT-BC438816  Petrorhagia dubia George K. Helmkamp; Mary Alice Barnes 2013-4-18 20357 Placer Northern Sierra Nevada Mtns Foothills: Yankee Jim Road, 2.4 miles east of its junction with Canyon Way, 2.5 mi. ENE (78 deg. ) of Weimar. 512 Comment
  CAS-BOT-BC541433  Petrorhagia dubia G. Ledyard Stebbins 1978-4-21 7820 El Dorado South Fork of the American River above Salmon Falls [exact location unknown] Comment
  CDA12572  Petrorhagia dubia G. F. Hrusa 1990-4-13 7680 Sacramento Natoma Unit - Folsom Lake State Rec. Area; Upper parts of American River Bluffs. Comment
  CDA15431  Petrorhagia dubia G. F. Hrusa, J. Hart 1998-5-1 14431 Tehama Sacramento Valley; Ridge above Coyote Creek wash, Coyote Creek Conservation Area ~1/2 mi. W of Paskenta Rd. Comment
  CDA16294  Petrorhagia dubia G. F. Hrusa, J. Glazner 2000-5-21 15400 Nevada Wolf Creek Drainage; Wolf Creek, opposite to Cerrito Rd on W side of Hwy 49. Comment
  CDA20465  Petrorhagia dubia P. Haggard 2003-9-15 PDR 1285905 Humboldt Northwestern California; Klamath River near Orleans. 0 Comment
  CDA21092  Petrorhagia dubia G. F. Hrusa, D. Kelch 2007-5-15 16992 Solano Vaca Mountains; Green Valley Canyon, entrance area. 152 Comment
  CDA21251  Petrorhagia dubia G. F. Hrusa, D. Kelch 2007-4-19 16971 Nevada Sierra Nevada Foothills; South Yuba River State Park. N side of Yuba River 175 Comment
  CDA24069  Petrorhagia dubia D. G. Kelch 2007-4-22 7 .195 Marin Mt. Tamalpais; E Bootjack Camp. 0 Comment
  CDA3412  Petrorhagia dubia F. Stewart 1963-5-15 Shasta Oak Run Road, ca. 2 miles south of Bullskin Ridge Road, ca. 2.5 miles southwest of Oak Run. 0 Comment
  CDA34251  Petrorhagia dubia David J. Keil, Field Botany class 2010-5-21 30776 Fresno Lower western slopes of Sierra Nevada. Highway 168, lower portion of 4-lane highway. Comment
  CDA36375  Petrorhagia dubia G. K. Helmkamp, E. A. Helmkamp 2009-5-7 14621 Placer Sierra Nevada Mountains Foothills; Oxbow Road, 2.0 miles south of its junction with Mosquito Ridge Road; north edge of Oxbow Reservoir. Comment
  CDA40135  Petrorhagia dubia G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18542 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 128 Comment
  CDA9188  Petrorhagia dubia Christopher Thayer 1995-6-5 s.n. Contra Costa Carquinez Strait; W of Pinole Peak. Comment
  CHSC101117  Petrorhagia dubia Zachary Garcia 2008-4-8 Butte Dark Canyon Rd. 591 Comment
  CHSC101313  Petrorhagia dubia Lowell Ahart 2009-4-22 15573 Butte West side of Guardians Trail, south side of the drainage just north of Pine Trail, Upper Bidwell Park, west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  CHSC102370  Petrorhagia dubia L. P. Janeway; B. Castro 2009-4-25 9747 Tehama Tehama Wildlife Area; along the Powerline Road near the Shaw Creek Bridge over an un-named northeastern fork of Shaw Creek. 518 Comment
  CHSC107092  Petrorhagia dubia V. Lockie 2010-4-6 Tehama Dye Creek Nature Conservancy Preserve. Specimen collected near trail adjacent to Dye Creek. 135 Comment
  CHSC108226  Petrorhagia dubia Lowell Ahart 2011-6-7 17388 Yuba On the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville. 66 Comment
  CHSC109071  Petrorhagia dubia Lowell Ahart; Linnea Hanson, Kaline Le Coq, Josephine Guardino 2012-4-27 17907 Butte On the north side of the path, near the sign, southwest of the intersection of Vallombrosa Avenue and Manzanita Avenue, Lower Bidwell Park, Chico. 80 Comment
  CHSC112283  Petrorhagia dubia Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18622 Mendocino Outer North Coast Range. Disturbed edges of Mountain View Road, 275 feet northeast of confluence of Bear Wallow and Honey Creeks. 237 Comment
  CHSC113344  Petrorhagia dubia Lowell Ahart; John Dittes 2014-5-16 19495 Tehama On the sides of the poor dirt road, about 200 yards southwest of the lone oak tree, about 1/2 mile east of the end of Lyon Cattle Road, about 3 miles (air) northeast of Los Molinos. 99 Comment
  CHSC116976  Petrorhagia dubia Matthew Forster 2013-4-9 Butte Centerville Rd., along flumes trail. 335 Comment
  CHSC118050  Petrorhagia dubia Daphne K. Christopher; Lowell Ahart, John Dittes, Hannah Stevens. 2003-4-17 193 Tehama Dye Creek Nature Conservancy Preserve. Antelope Creek trail. 767 Comment
  CHSC23020  Petrorhagia dubia Robert A. Schlising; G. Keator 1963-4-8 2489 Nevada Sierra Nevada. Near Bridgeport along Pleasant Valley Road. Roadside. Comment
  CHSC232  Petrorhagia dubia V. Holt 1941-5-10 Nevada Comment
  CHSC233  Petrorhagia dubia D. Sutton 1958-4-16 Butte Above first bridge on Richardson Springs road. 121 Comment
  CHSC2390  Petrorhagia dubia R. Carter 1965-5-19 214 Butte Found 7 mi. E of Oroville, along N side of Feathervale Ave., 20' from intersection with Wyandott LaPort Rd. 274 Comment
  CHSC27835  Petrorhagia dubia Eric J. Miller 1978-4-24 3 Tehama Ca. 1 km w of Sacramento River at Woodson Bridge. 28 Comment
  CHSC31264  Petrorhagia dubia R. K. Rabeler 1980-8-9 514 Plumas Plumas National Forest. On side of dirt road by Murphy Creek, 10 m W of CA 70, 3.5 km (2.2 mi) W of Belden Power House, Belden. Comment
  CHSC31334  Petrorhagia dubia Mark Stopher 1980-5-6 51 Trinity Along the Trinity River near Cedar Flat. Comment
  CHSC31381  Petrorhagia dubia J. D. Jokerst 1979-4-20 1209 Butte Top of North Table Mt., ca. .75 mi. NE of the junction of Cherokee Rd. and the E edge of the mountain. 396 Comment
  CHSC31563  Petrorhagia dubia L. Ahart 1974-4-11 376 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC33722  Petrorhagia dubia M. S. Taylor 1981-4-5 3487 Butte E side of Dark Canyon Rd, 2.2 mi s of its jct with Big Bend Rds, ca. 3 air mi s of Jarbo Gap on Hwy 70. 426 Comment
  CHSC37286  Petrorhagia dubia M. S. Taylor 1982-5-2 4382 Butte Along Truex Rd ca. 1/2 mi w of its jct with Hwy 70, ca. 10 air mi n of Oroville. Comment
  CHSC38297  Petrorhagia dubia Vernon Oswald 1983-3-14 184 Butte Upper Bidwell Park, Chico, on the north rim ca. 1500 ft w of the power lines. Along the edge of a jeep trail. 195 Comment
  CHSC3836  Petrorhagia dubia L. E. Dunkel 1965-4-15 19 Butte Along Lindo Channel, ca. 300 yards e of Longfellow Bridge and ca. 40 yards s of dwelling at 1356 Manzanita Ave. 27 Comment
  CHSC3909  Petrorhagia dubia J. Wheeler 1967-4-30 20 Tehama Along creek bank on sw side of intersection of Reeds Creek and Paskenta Road. 85 Comment
  CHSC40125  Petrorhagia dubia A. Petlock 1985-4-24 52 Mendocino Ca 3 mi sw of Boonville along s side of Hwy 128. 182 Comment
  CHSC40715  Petrorhagia dubia Pauleen Broyles 1982-4-15 420 Tehama The Nature Conservancy Vina Plains Preserve. 63 Comment
  CHSC44386  Petrorhagia dubia Lowell Ahart 1988-5-30 6026 Butte Near the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  CHSC45577  Petrorhagia dubia Lowell Ahart 1982-4-23 3348 Sutter Near the edge of the dirt road, about 1/4 mile north of the Myers home, Myers Ranch, Sutter Buttes. 45 Comment
  CHSC4644  Petrorhagia dubia R. Carter 1966-4-26 368 Butte Found ca. 10 mi. NE of Oroville on E side of Oroville-Quincy Rd., .3 mi. S of intersection with USFS road 21N40 to Bloomer Mt., growing 10 yds. off road. 609 Comment
  CHSC64520  Petrorhagia dubia Vernon H. Oswald; Lowell Ahart 1995-4-3 6579 Tehama Cascade Range Foothills. Dales Lake Ecological Reserve. W side of Manton Rd. (A6) ca. 1.5 mi n of Dales Station on Hwy. 36, ca. 14 mi ne of Red Bluff. On a bank of the intermittent stream located ne of the northern cluster of pools, upstream from the pile of discarded powerline insulators. 207 Comment
  CHSC66013  Petrorhagia dubia Vernon H. Oswald; Lowell Ahart 1996-4-29 7494 Tehama Northwest side of Sacramento Valley. Thomes Creek Ecological Reserve. CDFG parcel on the S side of Gyle Rd. Nw of Corning. (Collected on a gravel bar along the intermittent stream ca. 0.3 mi E of the W boundary). 102 Comment
  CHSC66483  Petrorhagia dubia Vernon H. Oswald; Lowell Ahart 1996-5-20 7611 Tehama Cascade Range Foothills. Hog Lake Plateau. BLM parcel along Hwy. 36 NE of Red Bluff. In a flood channel along Paynes Creek. 158 Comment
  CHSC75265  Petrorhagia dubia Jennifer Slater 1997-4-20 26 Butte At the Wurlitzer addition of the Vina Plains Preserve, west of Highway 99, approx 10 miles north of Chico. 67 Comment
  CHSC76048  Petrorhagia dubia G. F. Hrusa; J. Hart 1998-5-10 14431 Tehama Northern Sacramento Valley. Among pools on ridge above Coyote Creek wash, Coyote Creek Conservation Area +/- 1/2 mi. W of Paskenta Rd. 90 Comment
  CHSC90073  Petrorhagia dubia Charlie Crannell 1991-4-22 10 Butte Along side of Hwy 32, 4.1 mi northeast of Chico. 243 Comment
  CHSC9249  Petrorhagia dubia G. Strausbaugh 1970-4-26 53 Shasta NW side of Whiskeytown Hwy. beside culvert where Whiskey Creek inlets lake. 370 Comment
  CHSC92540  Petrorhagia dubia L. P. Janeway; M. Brown, S. Mackey Hillaire, C. Christofferson 2005-5-2 8372 Butte Northern High Sierra Nevada. Plumas National Forest; south side near top of ridge trending southeast from Flea Mountain; 2.1 km southeast of top of Flea Mountain and +-overlooking Pulga. Along un-used dirt road under high power lines. 1067 Comment
  CHSC9261  Petrorhagia dubia D. C. Burns 1971-4-6 128 Tehama Along Lassen rd., 5 yds. n of rd. and ca. 3.3 mi w of the intersection of Meridian rd. and Lassen rd. 76 Comment
  CHSC96551  Petrorhagia dubia L. P. Janeway 2006-4-30 8563 Butte Cascade Range Foothills. East edge of city of Chico; northwest side of Humboldt Road 2.4 km northeast of Bruce Road. 149 Comment
  CHSC96650  Petrorhagia dubia Lowell Ahart 2007-5-8 13733 Tehama Along flood plain of Dibble Creek, about 100 yards north of Highway 36, about 3.7 miles west of the intersection of Highway 36 and 99 or I-5, about 4 miles (air) northwest of Red Bluff. 111 Comment
  CHSC98957  Petrorhagia dubia Lowell Ahart 2008-5-12 14759 Butte Below the high water line of Lake Oroville, on the east side of Sucker Creek, about 100 yards north of where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile west of the Ponderosa Dam. 258 Comment
  HREC1127 Image available Petrorhagia dubia A. H. M. 1973-4-23 HF 260 Mendocino Foster Pasture Comment
  HREC1128 Image available Petrorhagia dubia A. H. M. 1978-7-24 HF 296 Mendocino Watershed II Comment
  HSC101570  Petrorhagia dubia J. P. Smith, J. O. Sawyer 2010-5-7 12843 Shasta Along Fender's Ferry Rd. at bridge across the Sacramento River. 339 Comment
  HSC101738  Petrorhagia dubia J. P. Smith, J. O. Sawyer 2010-5-2 12797 Siskiyou River access road, on the Salmon River. 164 Comment
  HSC32486  Petrorhagia dubia Bonnie Prange 1974-5-18 Humboldt Off Hwy. 299 at China Slide. Comment
  HSC47736  Petrorhagia dubia Thomas W. Nelson, Jane P. Nelson 1978-4-29 3942 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  JEPS100777  Petrorhagia dubia Dean W. Taylor 1999-4-29 17141 Calaveras serpentine hilltop ca 1 mile NW of Carson Hill on Highway 49 548 Comment
  JEPS103749  Petrorhagia dubia Art Hazebrook 2003-4-15 Monterey N of San Antonio River, S of Del Venturi Road, ca. 1.5 km E of confluence of San Antonio River and Pinalita Creek Santa Lucia Mountains, Fort Hunter Liggett 397 Comment
  JEPS111781  Petrorhagia dubia Christopher Thayer 1995-6-5 Contra Costa West of Pinole Peak 274 Comment
  JEPS113179  Petrorhagia dubia Lowell Ahart 2007-5-8 13733 Tehama Along flood plain of Dibble Creek, about 100 yards north of Highway 36, about 3.7 miles west of the intersection of Highway 36 and 99 or I-5, about 4 miles (air) northwest of Red Bluff 111 Comment
  JEPS114739  Petrorhagia dubia Lowell Ahart 2008-5-12 14759 Butte Below the high water line of Lake Oroville, on the east side of Sucker Creek, about 100 yards north of where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile west of the Ponderosa Dam 258 Comment
  JEPS115837  Petrorhagia dubia Lowell Ahart 2009-4-22 15573 Butte West side of Guardians Trail, south side of the drainage just north of Pine Trail, Upper Bidwell Park, west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico 381 Comment
  JEPS118316  Petrorhagia dubia Lowell Ahart 2011-6-7 17388 Yuba On the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville 66 Comment
  JEPS120009  Petrorhagia dubia Lowell Ahart, Linnea Hanson, Kaline Le Coq, Josephine Guardino 2012-4-27 17907 Butte Southwest of the intersection of Valllombrosa Avenue and Manzanita Avenue, Lower Bidwell Park, Chico. Comment
  JEPS121151  Petrorhagia dubia Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18622 Mendocino Mountain View Road, 275 feet northeast of confluence of Bear Wallow and Honey Creeks. Comment
  JEPS122122  Petrorhagia dubia Lowell Ahart, John Dittes 2014-5-16 19495 Tehama About 200 yards southwest of the lone oak tree, about 1/2 miles east of the end of Lyon Cattle Road, about 3 miles (air) northeast of Los Molinos. Comment
  JEPS125988  Petrorhagia dubia D. W. Taylor 2002-4-25 18010 Mariposa Western border of Yosemite National Park, along the Merced River Canyon on the terrace of the ridge adjacent to Hwy 140, ca 10 m inside the park boundary Comment
  JEPS14963  Petrorhagia dubia Peter H. Raven and G. L. Stebbins Jr. 1952-4-20 3992 Nevada 3 mi s Wolf 548 Comment
  JEPS1757  Petrorhagia dubia Duane Cutright 1952-4-12 32 Shasta 1 1/2 mi n Anderson 106 Comment
  JEPS18179  Petrorhagia dubia Rimo Bacigalupi with G. T. Robbins and F. Chisaki 1956-4-19 5615 Butte 5.3 mi n Bangor (along road from Oroville to Bangor) 182 Comment
  JEPS22658  Petrorhagia dubia Rimo Bacigalupi with Drs. Herbert and Lucille Mason 1958-4-22 6277 Yolo about 2.5 mi nw Rumsey (along roadside of California Highway 16 in canyon of Cache Creek, just e of mouth of Pocket Gulch); in canyon of Cache Creek, e of mouth Pocket Gulch 160 Comment
  JEPS23244  Petrorhagia dubia Herbert L. Mason 1927-5-11 3735 Yuba flat w North San Juan; w of North San Juan Comment
  JEPS67143  Petrorhagia dubia Gordon H. True 1971-4-20 6477 Marin on road to Black Point 1.5 mi ne Ignacio (ca 0.5 mi e of Redwood Highway); on road to Black Pont 3 Comment
  JEPS81863  Petrorhagia dubia L. R. Heckard with J. C. Hickman and R. C. Bacigalupi 1982-4-26 5846 Tehama about 2 1/2 mi w Paynes Creek (along highway 36 to Mt. Lassen (6 1/2 mi ne of Dales)); highway to Mt. Lassen, w of Paynes Creek 518 Comment
Read comments
Mar 21 2007
  JEPS88305  Petrorhagia dubia Vernon H. Oswald and Lowell Ahart 1996-5-20 7611 Tehama BLM parcel along Hwy. 36 n.e. Red Bluff (in flood channel along Paynes Creek); Cascade Range Foothills, Hog Lake Plateau, Paynes Creek 158 Comment
  JEPS96013  Petrorhagia dubia Vernon H. Oswald and Lowell Ahart 1996-4-29 7494 Tehama nw Corning (CDFG parcel on s side of Gyle Rd., along intermittent stream ca 0.3 mi e of the W boundary, Thomes Creek Ecological Reserve); nw Sacramento Valley, Thomes Creek Ecological Reserve 102 Comment
  JEPS97202  Petrorhagia dubia Vernon H. Oswald 1995-4-3 6579 Tehama T29N R2W SW1/4 NW1/4 Sec. 26, 680 ft, Cascade Range Foothills, Stony Tuscan Loam over hardpan. Dales Lake Reserve on the W side of Manton Rd. (A6) ca. 1.5 mi n of Dales Station on Hwy. 36, ca. 14 mi ne of Red Bluff 207 Comment
  OBI73322  Petrorhagia dubia David J. Keil, with Field Botany class 2010-5-21 30776 Fresno Lower western slopes of Sierra Nevada. Highway 168, lower portion of 4-lane highway; roadside area overlooking small reservoir 850 Comment
  OBI78874  Petrorhagia dubia Kristen Nelson 2013-5-22 s.n. San Luis Obispo Cuesta Grade. West side along dirt road west of TV tower Road 616 Comment
  OBI83006  Petrorhagia dubia David J. Keil 2015-6-12 33238 Monterey Area adjacent to campus of California State University, Monterey Bay. Bordered to east and north by Imjin Road and to south by 8th Street and Engineering Equipment Road, and traversed by blocked-off northern extension of 6th Avenue 60 Comment
  OBI83609  Petrorhagia dubia David J. Keil, Bill Waycott and Ron Rothman 2016-5-20 34215 San Luis Obispo Santa Rita Canyon area west of templeton. Ron Rothman property at 6140 High Laurel Lane. 400 Comment
  PGM3749  Petrorhagia dubia Vern Yadon 1995-5-4 Monterey Sierra de Salinas, Mt Toro summit Area, Dorrance Ranch S side lower elev Comment
  RSA0012079  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2011-5-6 17207 Yuba junction of Camp Far West Road and Spenceville Road, 5.4 mi. NE (47 deg ) of Wheatland. 56 Comment
  RSA0069353  Petrorhagia dubia Dean W. Taylor 2014-4-9 21466 Shasta Shasta Lake; Shasta-Trinity National Forest, along Gilman Road (Road 7H 009) about 0.4 road miles west of the entrance road to Dekas Rock Campground. 371 Comment
  RSA456109  Petrorhagia dubia Christopher Davidson 1977-6-19 5968 Mendocino 2.2 miles east of Gualala on County Road 502; bridge over Gualala River. 15 Comment
  RSA509435  Petrorhagia dubia B. Pitzer, S. Morgan, H. M. Soldan 1988-5-27 841 Nevada Sierra Nevada Mtns. Tahoe National Forest, 7 mi NE of Nevada City and c. 6 mi inside the forest, on Hwy 20 762 Comment
  RSA637565  Petrorhagia dubia Carol Chapman 1978-4-23 20 Napa Hwy 128, 4 miles E of intersection of Hwy 128 and Chiles Pope Valley Road. 488 Comment
  RSA710947  Petrorhagia dubia Sarah J. De Groot 2003-4-27 2611 San Diego Hidden Meadows, north of Escondido. Cerveza Drive. 427 Comment
  RSA711182  Petrorhagia dubia LeRoy Gross, Naomi Fraga, Aydee Virgen, Tim Thibault 2005-4-5 1805 San Diego Cuyamaca-Laguna Mountains region: West, southwest side of Viejas Mountain, at base of mountain. Just off West Boundary Truck Trail, just at the end of Anderson Road. Southwest side of the Cuyamaca Mountains. 795 Comment
  RSA725056  Petrorhagia dubia L. P. Janeway 2006-4-30 8563 Butte Cascade range Foothills. East edge of city of Chico; NW side of Humbolt Road 2.4 km northeast of Bruce Road. 149 Comment
  RSA781448  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2010-4-23 15934 El Dorado Salmon Falls Road at the Salmon Falls crossing of the American River 157 Comment
  RSA782284  Petrorhagia dubia R. W. Spjut 2008-4-28 16268 San Diego Inner Coast Ranges. Open space area above Valley Center and Lake Wohlford 550 Comment
  RSA788494  Petrorhagia dubia J. R. Shevock 1982-5-6 9426 Tulare Sequoia National Park. Along General s Highway, 2.5 mi N of Ash Mountain Park Headquarters near Potwisha Campground above Middle Fork Kaweah River. 610 Comment
  RSA789547  Petrorhagia dubia J. R. Shevock 1982-5-6 9426 Tulare Sequoia National Park. Along General s Highway, 2.5 mi N of Ash Mountain Park Headquarters near Potwisha Campground above Middle Fork Kaweah River. 610 Comment
  RSA789958  Petrorhagia dubia J. R. Shevock 1982-4-24 9315 Tulare Along Marble Fork Trail north of Potwisha Campground. 823 Comment
  RSA792084  Petrorhagia dubia J. R. Shevock 1982-4-24 9315 Tulare Along Marble Fork Trail north of Potwisha Campground. 823 Comment
  SBBG116330  Petrorhagia dubia A. Hazebrook 2003-4-15 Monterey N of San Antonio River, S of Del Venturi Rd, ca. 1.5 km E of confluence of San Antonio River and Pinalta Crk; Ft Hunter Liggett 397 Comment
  SBBG35402  Petrorhagia dubia D. Wilken with E. Painter 1999-5-5 Monterey ca. 1.6 km W of Ruby Cyn, ca. 2.9 km NNE of mouth of Oro Fino Cyn; Ft Hunter Liggett 330 Comment
  SBBG68313  Petrorhagia dubia D. Wilken with E. Painter 1999-5-17 15700 Monterey base of hills ca. 0.8 km E of Sam Jones Rd, ca. 1.6 km S of Martinus Corner; Ft Hunter Liggett 285 Comment
  SBBG7151  Petrorhagia dubia L. A. Eliassen 2005-4-12 100 Monterey ca. 1.4 km NNW of jct of Mission Rd and Sulphur Springs Rd, 0.3 km NNW of Engineers Reservoir; Ft Hunter Liggett 333 Comment
  SD129787 Image available Petrorhagia dubia Wayne P. Armstrong 1988-3-19 1289 San Diego Valley Center Grade -- burned area west side of Highway S-6 (near summit). 370 Comment
  SD155226  Petrorhagia dubia Jon P. Rebman, A. Pigniolo 2001-5-10 7333 San Diego Between Guatay and Pine Valley: near Pine Creek Trailhead southwest along trail to Pine Creek Wilderness; west of Pine Valley 1000 Comment
  SD157243  Petrorhagia dubia Jeannie Gregory 2004-4-17 773 San Diego Alpine, Viejas Mountain, Anderson Truck Trail, north of Anderson Road. Area burned in Oct 2003. 750 Comment
  SD181614  Petrorhagia dubia LeRoy Gross, Naomi Fraga, Aydee Virgen, Tim Thibault 2005-4-5 1805 San Diego Peninsular Ranges, Cuyamaca-Laguna Mts region, west-southwest side of Viejas Mtn, at base of mountain, just off West Boundary Truck Trail, just at the end of Anderson Rd, southwest side of the Cuyamaca Mtns. Gentle angle of slope, just south of creek. 794 Comment
  SD185633  Petrorhagia dubia Linda Shipman 2006-4-24 32 San Diego Escondido, Daley Ranch (southern end), no name hill, ca. 1 mi. NNE of the intersection of La Honda Dr. and El Norte Pkwy., ca. 1/4 mi. N of western half of Dixon Lake. 395 Comment
  SD228156  Petrorhagia dubia Jon P. Rebman, J. Green and C. Brennen 2012-5-24 24277 San Diego Lake Sutherland area: northeast of Ramona; north of Lake Sutherland; above the canyon on a rock outcrop just north of the dam and along Lake Sutherland Dam Road. 580 Comment
  SD228157  Petrorhagia dubia Jon P. Rebman, W. Schmidtmann, J. Green, V. Marshall,T. Barckley 2012-5-31 24532 San Diego Lake Hodges: south of Escondido; southeast of the intersection of Lake Drive and Beech Lane; north side of Lake along the shore near a small walking pier and adjacent habitats 99 Comment
  SD231093  Petrorhagia dubia James R. Shevock 1982-4-24 9315 Tulare Southern Sierra Nevada, Sequoia National Park. Along Marble Fork Trail north of Potwisha Campground. 822 Comment
  SD235309 Image available Petrorhagia dubia Jon P. Rebman, W. Schmidtmann & G. Kenney 2013-5-15 26434 San Diego Camp Pendleton: west-central portion of Base; Training Area Finch; east of Camp Horno, southwest of Range 216; along the South Fork of San Onofre Creek just north of Basilone Road 120 Comment
  SD237399  Petrorhagia dubia G. K. Helmkamp, E. A. Helmkamp 2010-4-23 15934 Placer Sierra Nevada Mountains Foothills: Salmon Falls Road at the Salmon Falls crossing of the American River (Pilot Hill 7.5'Q) 156 Comment
  SD239679  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2011-7-17 17774 Nevada Northern Sierra Nevada Mountains Foothills: You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95a^z) of Peardale (Chicago Park 7.5'Q) 686 Comment
  SDSU16412  Petrorhagia dubia Jon Rebman, A. Pigniolo 2001-5-10 7333 San Diego Between Guatay and Pine Valley: near Pine Creek Trailhead southwest along trail to Pine Creek Wilderness; west of Pine Valley 780 Comment
  SDSU17044  Petrorhagia dubia Jeannie Gregory 2004-4-17 773 San Diego Alpine, Viejas Mountain, Anderson Truck Trail, north of Anderson Road. Area burned in Oct 2003. 750 Comment
  SEINET11261936  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2012-4-30 18879 El Dorado Northern Sierra Nevada Mountains Footlhills: Mosquito Road, 0.3 miles N of the bridge over the South Fork American River.; 0 427 Comment
  SEINET12765173  Petrorhagia dubia Barbara Ertter 1990-5-12 8938 Tehama NW side of Dry Fork Creek NW of jct of Hwy 36 and Rt A5 (Bowman Rd) ca 15 air miles WNW of Red Bluff, on Reed property.; 0 183 Comment
  SEINET13203122 Image available Petrorhagia dubia George K. Helmkamp 2014-1 22749 Nevada Sierra Nevada Mountains Foothills: 8 miles west of Grass Valley, Penn Valley Drive, 0.2 mile southeast of its junction with CA-120 (Rough & Ready 7.5' Q.) 133 Comment
  SEINET207369  Petrorhagia dubia Rimo Bacigalupi, G. T. Robbins; F. Chisaki 1956-4-19 5615 Butte Along road from Oroville to Bangor, 5.3miles North of Bangor. 183 Comment
  SEINET223596  Petrorhagia dubia Richard R. Halse 1977-5-26 1585 Tehama By the first rest area north of Red Bluff along Interstate 5, 9 miles south of the Shasta County line. 125 Comment
  SEINET3245950  Petrorhagia dubia G. K. Helmkamp, E. A. Helmkamp 2010-1 15934 Placer Sierra Nevada Mountains Foothills: Salmon Falls Road at the Salmon Falls crossing of the American River (Pilot Hill 7.5') 157 Comment
  SEINET4560803  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2011-1 17774 Nevada Northern Sierra Nevada Mountains Foothills: You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 degrees) of Peardale 686 Comment
  SEINET4568264 Image available Petrorhagia dubia Sarah J. De Groot 2003-4-27 2611 San Diego Hidden Meadows, north of Escondido. Cerveza Drive. 427 Comment
  SEINET9367282  Petrorhagia dubia Unknown 2000-5-21 15400 Nevada Wolf Creek, serpentine outcrop near 1st house, opposite to Cerrito Rd on W side of Hwy 49. Uncommon, on serpentine edge. Comment
  SFV1248  Petrorhagia dubia M. L. Vincent 1962-4-17 201 Butte Sierra Nevada At Pentz and Nelson Bar Roads. 5 miles south of Paradise. 330 Comment
  SJSU5410  Petrorhagia dubia C. D. Duncan 1963-5-4 Butte Neal Rd between Chico & Paradise 487 Comment
  SJSU5411  Petrorhagia dubia C. D. Duncan 1963-5-4 Butte Honeyrun Rd between Chico & Paradise 487 Comment
  UC1076251  Petrorhagia dubia Herbert L. Mason 1927-5-11 3735 Yuba flat w North San Juan; flat w of North San Juan Comment
  UC1125846  Petrorhagia dubia H. S. Yates 1933-5-23 3616 Yuba two mi ne Spencerville Rd. Indian Springs--Spencerville; Smartsville Quad. Comment
  UC1481983  Petrorhagia dubia R. K. Rabeler 1980-8-9 514 Plumas 3.5 km (2.2 mi) w Belden Power House, Belden (10 m W of CA 70, on side of dirt road by Murphy Creek, Belden, Plumas National Forest); Plumas National Forest, by Murphy Creek Comment
  UC1561880  Petrorhagia dubia Barbara Ertter 1986-5-25 6158 San Diego 1.1 mi e of I-15 on Deer Springs Rd (Rt. S12) n San Marcos Comment
  UC1561881  Petrorhagia dubia Barbara Ertter with Thomas J. Delendick 1987-5-16 6957 Trinity ca 33 mi e Berry Summit (Hwy 299 w of Weaverville, edge of Trinity River on s side of hwy); edge of Trinity River, e of Berry Summit Comment
  UC1562742  Petrorhagia dubia Barbara Ertter with Linda Vorobik 1986-4-13 5874 Mendocino 6 mi w of Willits (on Hwy 20) 609 Comment
  UC1563726  Petrorhagia dubia Barbara Ertter with David Thompson 1989-4-8 8158 Placer Iowa Creek Road ca 2 mi from I-80 (near entrance to Auburn State Recreation Area, at creek crossing); near entrance Auburn State Recreation Area 518 Comment
  UC1585890  Petrorhagia dubia Barbara Ertter with David Thompson 1989-4-9 8187 Placer ca 8 airmi ne Auburn (Auburn-Forest Hill Road 6.2 mi sw of Spring Garden Road jct.) 609 Comment
  UC1787511  Petrorhagia dubia Jon P. Rebman, A. Pigniolo 2001-5-10 7333 San Diego Between Guatay and Pine Valley: near Pine Creek Trailhead southwest along trail to Pine Creek Wilderness; west of Pine Valley 780 Comment
  UC1969547  Petrorhagia dubia David Keil with Field Botany class 2010-5-21 30776 Fresno Lower western slopes of Sierra Nevada. Highway 168, lower portion of 4-lane highway; roadside area overlooking small reservoir. Comment
  UC2027620  Petrorhagia dubia Jon P. Rebman, J. Green, C. Brennen 2012-5-24 24277 San Diego Lake Sutherland area: northeast of Ramona; north of Lake Sutherland; above the canyon on a rock outcrop just north of the dam and along Lake Sutherland Dam Road. Comment
  UC2042834  Petrorhagia dubia Barbara Ertter 1990-5-12 8938 Tehama NW side of Dry Fork Creek NW of junction of Highway 36 and Route A5 (Bowman Road) ca. 15 air miles WNW of Red Bluff, on Reed property. Comment
  UC397060  Petrorhagia dubia Edith A. Wilkins 1929-4-21 Butte Bidwell Bar Comment
  UC572502  Petrorhagia dubia H. S. Yates 1933-5-23 3616 Yuba two mi ne Spenceville; Smartsville Quad. 304 Comment
  UC592758  Petrorhagia dubia Carl B. Wolf 1937-5-13 8632 Yuba on road to Stanfield Hill 2 mi above Browns Valley; Sierra Nevada foothills, above Browns Valley 121 Comment
  UC853258  Petrorhagia dubia A. A. Heller 1938-5-7 15077 Nevada on a roadside bank on Highway #20 between Smartsville and Rough and Ready Comment
  UC917309  Petrorhagia dubia R. L. Smith 1948-5-8 Napa 6 mi N of Aetna Springs, Pope Valley Comment
  UC942751  Petrorhagia dubia Peter H. Raven and G. L. Stebbins Jr. 1952-4-20 3992 Nevada 3 mi s Wolf 548 Comment
  UCD111922  Petrorhagia dubia Christopher Mallek 2008-1 AC1- 10 Shasta Ash Creek. 876 Comment
  UCD112264  Petrorhagia dubia Christopher Mallek 2008-5-8 AC4- 32 Shasta Ash Creek. 876 Comment
  UCD140561  Petrorhagia dubia Ellen Dean; T and M Starbuck, Davis Botanical Society 2013-4-6 7603 Sutter Sutter County; Sutter Buttes. Dean Ranch. Southeast of North Butte. South slope of Sunrise Ridge, above pond. 270 Comment
  UCD148794  Petrorhagia dubia Ellen Dean; Diana Hickson 2014-4-29 8102 Napa Knoxville public lands. California Department of Fish and Wildlife property. Headwaters of Nevada Creek. Most northwestern part of property. 603 Comment
  UCD149489  Petrorhagia dubia G. L. Stebbins 1978-4-21 7820 El Dorado South Fork of the American River above Salmon Falls. (Exact location unknown. Coordinates estimated by label maker.) Comment
  UCD15432  Petrorhagia dubia Margit Sands 1985-4-18 37 Sutter Sutter Buttes, Dean Place, at the base of North Butte, one mile northwest of ranch buildings; 213 Comment
  UCD18738  Petrorhagia dubia Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-10 31 Butte one mi. east of Rock River Mine and parking area, off Cherokee Rd., North Table Mountain, Oroville site. Comment
  UCD20834  Petrorhagia dubia N. Nicola 2001-4-4 50 Yolo Eastern foothills of inner North coast range, Capay Valley, 0.9 miles as the crow flies N. of Rumsey; Lowrey Ranch. Comment
  UCD21495  Petrorhagia dubia Jake Ruygt; Louise Vincenzio, Land Trust of Napa County 2002-4-22 4397 Napa Quail Ridge Reserve. 246 Comment
  UCD35950  Petrorhagia dubia Beecher Crampton 1953-4-29 1166 Tehama 4 miles south of Dales. Comment
  UCD37844  Petrorhagia dubia Beecher Crampton 1962-4-24 6241 Yuba 5 miles east of Brown's Valley, 2.5 miles north-northwest of Smartsville, University of California Foothill Field Station. Comment
  UCD37858  Petrorhagia dubia Beecher Crampton 1962-4-24 6264 Yuba 5 miles east of Brown's Valley, 2.5 miles north-northwest of Smartsville, University of California Foothill Field Station. Comment
  UCD37867  Petrorhagia dubia Beecher Crampton 1962-4-24 6283 Yuba 5 miles east of Brown's Valley, 2.5 miles north-northwest of Smartsville, University of California Foothill Field Station. Comment
  UCD39077  Petrorhagia dubia Beecher Crampton 1963-4-23 6737 Sacramento Michigan Bar. Comment
  UCD46328  Petrorhagia dubia Darrell Brandon; with Plant Biology 192 collection interns 2005-4-30 5 Sacramento California: Sacramento County, Deer Creek Hills Reserve, north of Latrobe Rd., starting out along Latrobe 1.5 road miles W of intersection with Michigan Bar Rd. 113 Comment
  UCD46418  Petrorhagia dubia Carol Witham; Rod Ries 2005-4-30 Sacramento California: Sacramento County, Deer Creek Hills Reserve, south of Latrobe Rd., starting out along Latrobe 1.5 road miles W of intersection with Michigan Bar Rd. 112 Comment
  UCD47552  Petrorhagia dubia G. Ledyard Stebbins 1983-5-7 C 395 Solano Stebbins Cold Canyon Reserve. W side of canyon, along trail. 213 Comment
  UCD47958  Petrorhagia dubia Ryan Knox; E. McDermott and G. Walden 2002-4-13 9 Napa Napa Co., McLaughlin Natural Reserve, from old town of Knoxville travel 0.4 miles south, turn west along Berryessa-Knoxville Rd. and continue 0.7 miles. Collected on north side of road near calcium seep area. 453 Comment
  UCD47959  Petrorhagia dubia M. K. Voigt; E. Sweeney and M. Miller 2002-4-13 1 Napa McLaughlin UC Reserve. SW of old town of Knoxville on N side of Knoxville-Berryessa Rd. 426 Comment
  UCD48848  Petrorhagia dubia M. Eng; W. Wong, N. Wannlund, and A. Holman 2002-5-4 18 Napa Quail Ridge UC Reserve, northern tip of peninsula just N of power lines in open grassy swale. 274 Comment
  UCD61965  Petrorhagia dubia CRP Monitoring Crew 2006; J. Buck, J. Baty, A. Causey, and S. Smith 2006-7-17 51 Sacramento SACRAMENTO COUNTY: Cosumnes River Preserve: Collected for Riparian Vegetation Monitoring project. Castello forest, east of Highway 99 north of Dillard Road. Macroplot 12. Comment
  UCD72534  Petrorhagia dubia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3825 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.5 mile downstream of bridge. 246 Comment
  UCD73711  Petrorhagia dubia Ayzik Solomeshch 2004-6-22 s. n. Yolo Audubon Bobcat Ranch, west of the city of Winters. Southeastern corner of ranch. 83 Comment
  UCD80213  Petrorhagia dubia CNPS SN Foothill Team 2005-4-12 SNFN 0105 a Placer Placer Legacy Spears/Didion Ranch, site is located in the Spear's Ranch boundary off of Highway 49. The south-facing plot is above Coon Creek. 216 Comment
  UCD81815  Petrorhagia dubia Ellen Dean 2009-4-24 5442 Napa Property on the SE slope of Mt. St. Helena. 3860 Hwy 29. 297 Comment
  UCD95056  Petrorhagia dubia Collin Edwards; PLS 102 Plant Collection Interns 2011-4-30 4 El Dorado North of Cameron Park. Pine Hill Preserve. Kanaka Valley Unit. Kanaka Valley near main dirt road. 304 Comment
  UCD98375  Petrorhagia dubia Carol Chapman 1978-4-23 20 Napa Hwy 128, 4 miles east of intersection of Hwy 128 and Chiles Pope Valley Road. 487 Comment
  UCD98376  Petrorhagia dubia M. D. Clegg 1963-5-4 27 Placer Folsom Reservoir, 2 miles north of Folsom, southeast corner of county. 60 Comment
  UCD98377  Petrorhagia dubia G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11820 Amador Northern Sierra Nevada Mountains; along CA E-16, 0.7 mile south of River Pines. 610 Comment
  UCD98378  Petrorhagia dubia G. K. Helmkamp; E. A. Helmkamp 2007-5-1 11907 El Dorado Northern Sierra Nevada Mountains; access to road to South Fork American River along CA-49, 4.4 miles northwest of Coloma. 207 Comment
  UCD98384  Petrorhagia dubia M. H. Mills 1996-4-21 167 Placer at 5830 Walden Lane, Loomis. 180 Comment
  UCD98389  Petrorhagia dubia R. L. Smith 1948-5-8 s.n. Napa 6 mlies north of Aetna Springs, Pope Valley. Comment
  UCD98392  Petrorhagia dubia Collector unknown 1950-1 s.n. Nevada near Nevada City. Comment
  UCR11246  Petrorhagia dubia Wm. Horn Jr. 1967-5-13 670513- 01 Shasta Anderson, immediately south of Pinon Ave., 100 yds west of Hwy 99 (Business Interstate 5) 152 Comment
  UCR153499  Petrorhagia dubia Jon P. Rebman, A. Pigniolo 2001-5-10 7333 San Diego Peninsular Ranges/ Coastal Foothills, Between Guatay and Pine Valley: near Pine Creek Trailhead, SW along the trail to Pine Creek Wilderness, west of Pine Valley (Square: P21) 780 Comment
  UCR169013  Petrorhagia dubia David Charlton 2005-5-16 8001 A Yuba Sacramento Valley, Yuba Gold Field; just south of Yuba River; c. 7.5 mi ENE of Marysville; N of Beale Air Force Base; Survey area c. 2 miles by 1 mile 46 Comment
  UCR173296  Petrorhagia dubia George K. Helmkamp, Elizabeth Helmkamp 2006-4-29 10253 El Dorado Northern Sierra Nevada Foothills, Rock Creek Road, 0.9 mi. east of Calif. Hwy 193 along the S Fork of the American River 415 Comment
  UCR173299  Petrorhagia dubia George K. Helmkamp, Elizabeth Helmkamp 2006-4-27 10246 El Dorado Northern Sierra Nevada Foothills, c. 20 mi. by air east of Sacramento; 0.9 mi. N of Brandon Corner along French Creek Road 256 Comment
  UCR173346  Petrorhagia dubia George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10380 Nevada Northern Sierra Nevada Mtns., Cedarsong Road, 0.1 mi. NE of Calif. Hwy 49 (NW of Nevada City) 637 Comment
  UCR173362  Petrorhagia dubia George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10363 Amador Northern Sierra Nevada Foothills, Near Enterprise, c. 0.4 mi. east of Calif. Hwy 88 on an unnamed dirt road (probably Bell Road) 305 Comment
  UCR177788  Petrorhagia dubia LeRoy Gross, Naomi Fraga, Aydee Virgen, T. Thibault 2005-4-5 1805 San Diego Cuyamaca-Luguna Mountains, W, SW side of Viejas Mtn, at base of mountain. Just off West Boundary Truck Trail, just at the end of Anderson Road. SW side of the Cuyamaca Mtns 795 Comment
  UCR184805  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2007-5-7 11968 El Dorado Foothills, Northern Sierra Nevada Mountains, Pedro Hills Road, 0.5 mile west of its junction with Calif. Hwy 49, junction of roads 5.3 miles south of Cool 311 Comment
  UCR184850  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2007-4-26 11820 Amador Foothills, northern Sierra Nevada Mountains, along Calif. E-16, 0.7 mile south of River Pines 610 Comment
  UCR187512  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2007-4-20 11752 El Dorado Foothills, Northern Sierra Nevada Mountains, junction of French Creek Road and Lost Creek road just north of Frenchtown 366 Comment
  UCR188157  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2007-5-1 11907 El Dorado Foothills, Northern Sierra Nevada Mountains, access road to South Fork American River along CA-49, 4.4 miles northwest of Coloma 207 Comment
  UCR196226  Petrorhagia dubia M. K. Voigt, E. Sweeney, M. Miller 2002-4-13 01 Napa McLaughlin UC Reserve. Southwest of old town of Knoxville on north side of Knoxville-Berryessa Road 427 Comment
  UCR196993  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2008-5-20 13462 Yuba Sierra Nevada Mountains Foothills, along CA-49, 0.1 mile north of the Nevada Co. line at Oregon Creek 466 Comment
  UCR207672  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2009-4-21 14529 El Dorado Sierra Nevada Mountains Foothills, junction of Rock Creek Road and CA-193, north of Chili Bar and the South Fork of the American River 390 Comment
  UCR207870  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2009-4-22 14576 Placer Sierra Nevada Mountains Foothills, Rucky Chuck Rd. (dirt) 1.2 miles southeast of Forest Hill Road 448 Comment
  UCR208579  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2009-5-7 14621 Placer Sierra Nevada Mountains Foothills, Oxbow Road, 2.0 miles south of its junction with Mosquito Ridge Road; north edge of Oxbow Reservoir 402 Comment
  UCR217875  Petrorhagia dubia George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16130 El Dorado Sierra Nevada Mountains Foothills, Slug Gulch Road, 2.9 miles east of its junction with Perry Creek road 1012 Comment
  UCR218141  Petrorhagia dubia George K. Helmkamp, Amy Barnes 2010-5-7 16001 Calaveras Sierra Nevada Mountains Foothills, Mountain Ranch Road, 3.2 miles east of San Andreas 436 Comment
  UCR223953  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2010-4-23 15934 El Dorado Sierra Nevada Mountains Foothills, Salmon Falls Road at the Salmon Falls crossing of the American River 157 Comment
  UCR231321  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2011-5-6 17207 Yuba East edge of Sacramento Valley, junction of Camp Far West Road and Spenceville Road, 5.4 mi. NE (47 deg. ) of Wheatland 56 Comment
  UCR232251  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2011-6-7 17491 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 7.6 rd. miles northeast (via Pine Gulch & Gopher Flat rds) of junction of Sutter Creek Rd. and Pine Gulch Rd. 712 Comment
  UCR233661  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2011-7-17 17774 Nevada Northern Sierra Nevada Mountains Foothills, You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 deg. ) of Peardale 686 Comment
  UCR235633  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2012-4-30 18879 El Dorado Northern Sierra Nevada Mountains Foothills, Mosquito Road, 0.3 mile north of the bridge over the South Fork American River 427 Comment
  UCR237048  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2012-4-21 18810 Nevada Northern Sierra Nevada Mountains Foothills, junction of Lime Kiln Road and Amberley Lane, 14.5 mi. NNW (345 deg. ) of Auburn 414 Comment
  UCR237312  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2012-4-14 18763 Butte Northwestern Sacramento Valley, entrance to Oroville Wildlife Area, 0.2 mile west of CA-70, near the Feather River 46 Comment
  UCR244955  Petrorhagia dubia Jon P. Rebman, W. Schmidtmann, J. Green, V. Marshall,T. Barckley 2012-5-31 24532 San Diego South Coast, Lake Hodges: south of Escondido, southeast of the intersection of Lake Drive and Beech Lane, north side of Lake along the shore near a small walking pier and adjacent habitats 100 Comment
  UCR245390  Petrorhagia dubia Linda Shipman 2006-4-24 032 San Diego Peninsular Range, Escondido, Daley Ranch (southern end), 'no name' hill, c. 1 mi. NNE of the intersection of La Honda Dr. and El Norte Pkwy., c. 1/4 mi. N of western half of Dixon Lake. Atlas Square: H11 396 Comment
  UCR250351  Petrorhagia dubia George K. Helmkamp, Mary Alice Barnes 2013-4-18 20357 Placer Northern Sierra Nevada Mtns Foothills, Yankee Jim Road, 2.4 miles east of its junction with Canyon Way, 2.5 mi. ENE (78 deg. ) of Weimar 512 Comment
  UCR250606  Petrorhagia dubia George K. Helmkamp, Mary Alice Barnes 2013-4-24 20381 Amador Northern Sierra Nevada Mountains Foothills, Along CA-26 (Red Corral/West Point-Pioneer Rd.), 2.8 miles southeast of its junction with CA-88 905 Comment
  UCR257150  Petrorhagia dubia George K. Helmkamp 2014-4-17 22749 Nevada Sierra Nevada Mountains Foothills, 8 miles west of Grass Valley, Penn Valley Drive, 0.2 mile southeast of its junction with CA-120 438 Comment
  UCR257559  Petrorhagia dubia George K. Helmkamp, Elizabeth Helmkamp 2013-5-2 20453 El Dorado Sierra Nevada Mountains Foothills, Happy Valley Road, 0.6 mile east of its junction with Mt. Aukum Road, 1.65 air miles NE (72 deg. ) of Somerset 665 Comment
  UCR258401  Petrorhagia dubia George K. Helmkamp 2014-5-21 22913 El Dorado Sierra Nevada Mountain Foothills, Bucks Bar Road, 0.8 mile northwest of the bridge over North Fork Cosumnes River 605 Comment
  UCR260826  Petrorhagia dubia M. Kauffman 1997-4-27 08 Nevada Sierra Nevada Mtns., Nevada City, from intersection Hwy 20 and Hwy 49, 0.3 miles on Hwy 49 to N Bloomfield Road, left 1.3 miles from Rector Road 793 Comment
  YM-YOSE225074  Petrorhagia dubia Alison Colwell 2009-4-27 09 049 c Mariposa El Portal Administrative Site, Resources Management and Science office building 546 Comment
  YM-YOSE225075  Petrorhagia dubia Alison Colwell 2009-4-27 09 049 c Mariposa El Portal Administrative Site, Resources Management and Science office building 546 Comment
  CAS-BOT-BC322135  Petrorhagia dubia A. Williams 2013-4-19 13253 Marin Mount Tamalpais, Marin Municipal Water District lands Comment
  CDA3408  Petrorhagia dubia T. C. Fuller 1963-7-15 10856 Butte East side of Highway 99E to Vina, 12.0 miles northwest of Chico. 0 Comment
  CDA3409  Petrorhagia dubia G. H. True 1971-6-3 6477 A Marin Road to Black Point 0.5 miles east of Redwood Highway and 1.5 miles northeast of Ignacio. Comment
  CDA3410  Petrorhagia dubia T. C. Fuller 1958-4-15 3805 Butte Highway 99E, 4 miles northwest of Oroville. 0 Comment
  CDA3411  Petrorhagia dubia G. D. Barbe 1985-4-5 4208 Tehama Reed Creek west of Red Bluff. Comment
  CDA3413  Petrorhagia dubia W. E. Simonds 1960-5-1 4116 El Dorado East shore of Folsom Lake, on road to Pilot Hill, ca. 5 miles northeast of Folsom. 0 Comment
  CDA3414  Petrorhagia dubia E. Yeaw 1963-5-14 Sacramento Deterding Woods, north bank of American River, Carmichael. 0 Comment
  CDA3415  Petrorhagia dubia D. H. Wilken, E. Painter 1999-5-5 s.n. Monterey ca. 1.6 air km due west of Ruby Cyn, ca. 2.9 air km north-northeast of mouth of Oro Fino Cyn. Comment
  CHSC118386  Petrorhagia dubia Tim Kask 2015-4-27 241 Tehama Antelope Creek along 'McClure Trail' 10T 0599021/4458480 Comment
  HSC1656  Petrorhagia dubia Larry Berti 1969-5-9 76 Tehama Antelope Creek Canyon, N face, 12 mi. E of Red Bluff, 3 mi. upstream from dam. 213 Comment
  HSC23287  Petrorhagia dubia T. C. DeWitt 1971-4-4 26 Butte 5.6 mi. NW of Oroville on Table Mtn. W side of rd. 213 Comment
  HSC26590  Petrorhagia dubia D. E. Anderson 1973-4-20 Humboldt Flood plain of Eel River 5 mi. E of Founders Tree area, Avenue of the Giants Comment
  HSC26798  Petrorhagia dubia Thomas W. Nelson 1971-4-25 418 Trinity Hwy. 299 at Big Flat Comment
  HSC32615  Petrorhagia dubia R. A. Vanbianchi 1974-4-20 231 Butte Table Mtn. 305 Comment
  HSC32618  Petrorhagia dubia Dave Knorr 1974-4-20 118 Butte On Pentz Rd. near intersection with Clark Rd. Comment
  HSC32619  Petrorhagia dubia David Johnson 1974-4-20 27 Butte Along Pentz Rd., S of Clark Rd. intersection. Comment
  HSC35088  Petrorhagia dubia A. M. Montalvo 1975-5-17 252 Trinity Humboldt Meridian, along Hwy. 299 at the Hayden Flat Campground 390 Comment
  HSC35421  Petrorhagia dubia Robert M. Specht 1975-5-4 173 Tehama 7.5 mi. N of Red Bluff on I-5 at the Rest Stop 91 Comment
  HSC4297  Petrorhagia dubia D. Norris 1969-5-10 Trinity Along Hwy. 299 across from Willy Jack Trail Comment
  HSC43129  Petrorhagia dubia Maralyn O'Meara 1974-4-20 282 Butte Along Pentz Rd. 300 yds. S of the intersection with Clark Rd. 76 Comment
  HSC46446  Petrorhagia dubia J. P. Smith 1975-5-17 8118 Trinity Along Hwy. 299 at Hayden Flat Campground 390 Comment
  HSC46447  Petrorhagia dubia J. P. Smith, J. O. Sawyer, Thomas W. Nelson 1978-4-9 9719 Shasta County Rd. A16, 9.7 mi. from its junction with Hwy. 36 381 Comment
  HSC46448  Petrorhagia dubia J. P. Smith, J. O. Sawyer 1973-4-14 6064 Butte Rock Rd., 1 mi. W of Cohasset Rd. near Chico Comment
  HSC62896  Petrorhagia dubia J. M. DiTomaso 1979-4-29 919 Trinity Grays Falls Campground, on rocky slope above Trinity River. 305 Comment
  HSC62993  Petrorhagia dubia David Wheeler 1979-4-29 87 Trinity Hwy. 299 1 mi. E of Big French Creek, beside Trinity River Comment
  HSC63487  Petrorhagia dubia M. A. Baker 1977-6-6 381 Humboldt Hoopa Indian Reservation Comment
  HSC65092  Petrorhagia dubia J. P. Smith, J. O. Sawyer 1976-5-2 8625 Humboldt 3.7 mi. N of junction with Hwy. 299 on Hwy. 96 61 Comment
  HSC66795  Petrorhagia dubia Cathy Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-5-4 90 Trinity Hwy. 299, 1/4 mi. E of Hayden Flat Campground Comment
  HSC85702  Petrorhagia dubia J. P. Smith, J. O. Sawyer 1982-5-8 10362 Shasta 0.7 mi. N of French Gulch 640 Comment
  HSC85781  Petrorhagia dubia Andrea Begnoche, Leonel Arguello, Bobbi Schnell 1987-4-25 40 Trinity Steelbridge Campground Comment
  HSC87177  Petrorhagia dubia Clare R. Wheeler 1981-4-10 2003 Mendocino Hopland, Mtn. House Rd., 6.85 mi. N of Hwy. 128 206 Comment
  HSC90019  Petrorhagia dubia Andrew Enberg, Brad Penkala, Dan Scofield 1990-3-31 26 Tehama Hwy. 36, 3 mi. E of Rd. A5 229 Comment
  HSC97931  Petrorhagia dubia Cara Witte 2007-6-14 272 Humboldt Along National Forest 1. Near Kinsey Ridge and cattle guard. 3 miles north of intersection with 4N09. 1393 Comment
  OBI17375  Petrorhagia dubia Robert F. Hoover 1968-5-28 11117 Shasta Stillwater Crk E of Redding Comment
  OBI48155  Petrorhagia dubia Rhonda Riggins 1989-4-26 1614 Nevada At corner of Rough and Ready hwy and Ridge Rd W of Grass Valley, 3.1 mi E Rough and Ready, 5.6 mi E hwy 20 1097 Comment
  OBI62169  Petrorhagia dubia D. H. Wilken, E. Painter 1999-5-5 s.n. Monterey Ca. 1.6 air km due W of Ruby Cyn, ca 2.9 air km due W of Ruby Cyn, ca 2.9 air km NNE of mouth of Oro Fino Cyn. UTM: 10S 661212E, 3984313N 330 Comment
  OBI72560  Petrorhagia dubia Laura Eliassen 2005-4-12 100 Monterey Ca. 1.4 air km NNW of intersection of Mission Rd and Sulphur Springs Rd, 0.3 km NNW of Engineers Reservoir; Ft Hunter Liggett. UTM (WGS84) zone 10N: 658999E, 3987181N 333 Comment
  OBI73332  Petrorhagia dubia David J. Keil, with Field Botany class 2010-5-7 30751 Monterey Fort Ord. Trail off Parker Flats Road near BLM headquarters building Comment
  OBI77899  Petrorhagia dubia A. Lison, M. Blumler 1987-4-24 654 -10 Tehama hwy 36 between Dales and Paynes Crk; 4-5 mi SW of Dales Comment
  PGM2797  Petrorhagia dubia Ron Branson 1986-5-27 Monterey Gabilan Range, Fremont Peak, at summit (specimen Garden grown) Comment
  PGM3114  Petrorhagia dubia Vern Yadon 1990-5-15 Monterey Santa Lucia Mountains, Big Pines Trail junction with Carmel Riv Tr, 200 yds W of tr Xing Comment
  PGM4150  Petrorhagia dubia Vern Yadon 1989-5-9 Monterey Gabilan Range, Fremon Peak summit, Cultivated oiginally fr Fremont Peak summit Comment
  POM244285  Petrorhagia dubia C. B. Wolf 1937-5-13 8632 Yuba Sierra Nevada Foothills, 2 miles above Browns Valley on road to Stanfield Hill. 122 Comment
  POM253230  Petrorhagia dubia A. A. Heller 1938-5-7 15077 Nevada On Hwy 20 between Smartsville and Rough and Ready. Comment
  RSA126122  Petrorhagia dubia P. H. Raven 1952-4-20 3992 Nevada Nevada County: 3 miles S of Wolf. 548 Comment
  RSA261406  Petrorhagia dubia H. J. Vaux Jr. 1961-5-20 47 Yuba State Hwy 20, 12.3 miles W of Marysville. Comment
  RSA293426  Petrorhagia dubia Reino Alava 1958-5-3 2021 Placer Near the Forestry Station at Auburn. Comment
  RSA418548  Petrorhagia dubia Mignonne Bivin, Gail Baker 1978-5-1 64 Tulare Sequoia National Park; Potwisha Campground, S side of Generals Hwy, beside Marble Fork. 610 Comment
  RSA41905  Petrorhagia dubia Ella Dales Cantelow 1940-5-10 3078 Butte 10 miles E of Oroville, Bidwell Bar Bridge. Comment
  RSA424717  Petrorhagia dubia Aaron Liston, M. Blumler 1987-4-24 654 -10 Tehama Hwy 36 between Dales and Paynes Creek; 4-5 miles SW of Dales. Comment
  RSA456110  Petrorhagia dubia Christopher Davidson 1973-5-28 2186 Trinity E of Burnt Ranch on Hwy 299, Trinity River Canyon, Trinity National Forest. 305 Comment
  RSA517010  Petrorhagia dubia Barbara Ertter, L. Vorobik 1986-4-13 5874 Mendocino Ca 6 miles W of Willits on Hwy 20. 610 Comment
  RSA537447  Petrorhagia dubia Barbara Ertter, David M. Thompson 1989-4-9 8187 Placer Auburn-Forest Hill Road 6.2 miles southwest of Spring Garden Road junction, 8 miles northeast of Auburn. 610 Comment
  RSA554582  Petrorhagia dubia Walter Wisura 1993-5-9 4900 Trinity NORTHWEST: Hwy 299, 64 miles W of Redding. Comment
  RSA638773  Petrorhagia dubia Michael A. Vincent, Ethan H. Freid 1998-4-7 8156 Yolo Above State Rt. 128, 4 miles west of Winters. Comment
  RSA669477  Petrorhagia dubia R. R. Halse 1977-5-26 1585 Tehama Creek bed by the first rest area N of Red Bluff along Interstate Hwy 5, 9 miles S of the Shasta County Line. 125 Comment
  RSA678087  Petrorhagia dubia Sarah J. De Groot 2002-5-26 727 San Diego 10678 Cerveza Dr., Hidden Meadows 92026 Comment
  RSA680414  Petrorhagia dubia Sarah J. De Groot 2002-5-8 550 San Diego 10678 Cerveza Dr., Hidden Meadows 92026. Comment
  SBBG115476  Petrorhagia dubia R. Molholm 1998-4-11 13 Butte upper Bidwell Park, ca. 1 km E of Horseshoe Lake, along rd that follows Chico Crk 104 Comment
  SBBG17322  Petrorhagia dubia M. Vincent 1962-4-17 201 Butte Pentz and Nelson Bar Rds, 5 mi S of Paradise Comment
  SEINET11933238  Petrorhagia dubia Unknown 1984-1 14 Butte ca 0.75 mi NE of Centinnial and Manzanita avenues 70 Comment
  SEINET12558101 Image available Petrorhagia dubia John Thomas Howell 1965-1 41229 Madera Near San Joaquin River bridge on road between Northfork and Auberry Comment
  SEINET12558102 Image available Petrorhagia dubia Barbara Ertter, David Thompson 1989-1 8187 Placer Auburn-Forest Hill Road 6.2 mi SW of Spring Garden Road jct., on NW side of road, ca 8 airmiles NE of Auburn 610 Comment
  SEINET12558103 Image available Petrorhagia dubia Barbara Ertter, Linda Vorobik; Elizabeth Neese 1988-1 7531 Lake Hwy 175 over Mayacamas Mtn between Lakeport and Hopland, just E of e-most summit on rd (between S Fk Scotts Cr and Manning Cr) Comment
  SEINET5337022  Petrorhagia dubia G. H. True Jr. 1971-4-20 6477 Marin On road to Black Point ca. 0.5 miles east of Redwood Highway and 1.5 miles northeast of Ignacio. 3 Comment
  SEINET5337023  Petrorhagia dubia C. Aarstad 1979-4-28 s.n. Yuba At junction of Rt. 20 and north fork of Yuba in Browns Valley 183 Comment
  SEINET5337024  Petrorhagia dubia D. Selleck 1979-4-27 s.n. Yuba Sierra Field Station-UC Davis Comment
  SEINET5337378  Petrorhagia dubia W. Short 1959-4-11 s.n. Yuba 5 miles west of Smartville, Calif. on California highway 20. 366 Comment
  SEINET5337379  Petrorhagia dubia M. Dailey 1959-4-24 s.n. Yuba Rough and Ready, California, just off highway 20. 732 Comment
  SEINET5337381  Petrorhagia dubia R. T. Short 1959-4-11 11 Nevada 5 miles west of Smartville on Calif. 20. 366 Comment
  SEINET5337382  Petrorhagia dubia C. Fitz 1959-4-24 s.n. Nevada Near Nevada City, Hw 20 open meadow, grow in profusion, tall in shade. 762 Comment
  SEINET5726582 Image available Petrorhagia dubia Gary L. Carlin 1971-1 28 Butte Honey Run Road crossing of Butte Creek, 3.7 miles east of Chico.; Chico 122 Comment
  SFV10239  Petrorhagia dubia M. L. Vincent 1964-4-9 s. n. Butte Pentz Road, 0.25 miles west from Barnum Road. Comment
  SFV8392  Petrorhagia dubia M. D. Clegg 1963-5-4 27 Placer Folsom Reservoir, 2 miles north of Folsom in southeast corner of Placer County. 61 Comment
  UC1949112  Petrorhagia dubia Barbara Ertter with Linda Vorobik and Elizabeth Neese 1988-6-4 7531 Lake Hwy 175 over Mayacamas Mtn between Lakeport and Hopland, just E of e-most summit on rd (between S Fk Scotts Cr and Manning Cr); S-facing slope Comment
  UC2070540  Petrorhagia dubia Barbara Ertter with J. Kerbavaz, David Gowen, Mike Park and Victoria Seidman 2004-4-22 18363 Contra Costa Old Pioneer Horse Camp on Green Ranch Road, south side of Mount Diablo summit. Comment
  UCD15484  Petrorhagia dubia Kathie Specht 1984-5-2 2 Amador 1 mile E of defender Rd on Red Corral Rd. 621 Comment
  UCD22706  Petrorhagia dubia April McCoy 1984-5-5 23 Amador 12 miles east of Jct. 88 on Hwy 88. 426 Comment
  UCD62209  Petrorhagia dubia B. Harbert 2007-6-11 66 Sacramento SACRAMENTO COUNTY: Cosumnes River Preserve, Denier 2 at levee breach. Comment
  UCD98373  Petrorhagia dubia L. Ahart 1982-4-23 3348 Sutter 1/4 mile north of Myers home, Myer's Ranch. 50 Comment
  UCD98374  Petrorhagia dubia Mary Anne Brayton 1964-5-2 22 Yuba Harry L. Englebright Dam, State Highway 20, 20 miles northwest of Marysville. 182 Comment
  UCD98380  Petrorhagia dubia Susan Horner 1976-5-2 22 Nevada Alleghany, on Graniteville Road, 2.3 miles Northeast of North Bloomfield. Comment
  UCD98382  Petrorhagia dubia Carl A. Huether Jr. 1964-4-18 34 El Dorado first picnic area near entrance, Folsom Lake State Park; 50 yards from high water line of lake. Comment
  UCD98386  Petrorhagia dubia Ted Niehaus 1959-4-11 35 Nevada Robert Ford Ranch, 200 feet from house on Piper Creek, 2 miles east of Englebright Dam (on Yuba River), western part of country. Comment
  UCD98387  Petrorhagia dubia R. H. Ramsey 1961-5-13 49 Butte 2 miles south of Berry Creek on Oroville-Quincy Road. Comment
  UCD98388  Petrorhagia dubia M. Rejmanek 1995-7-2 s.n. Nevada 15 km n. of Nevada City, South Yuba River. Comment
  UCD98390  Petrorhagia dubia Gordon H. True 1971-4-20 6477 Marin on road to Black Point, 0.5 mile east of Redwood Highway and 1.5 miles northeast of Ignacio. 3 Comment
  UCD98393  Petrorhagia dubia Michael A. Vincent; Ethan H. Freid 1998-4-7 8156 Yolo above St. Rt. 128, 4 road miles west of winters. Comment
  UCD98394  Petrorhagia dubia Barbara Yungert 1974-4-12 24 Yuba Along four wheel drive road, north of Yuba River, F-2 project area, Sierra Foothill Field Station. Comment
  UCSB27413  Petrorhagia dubia Kunze, G. 1971-6-6 Sierra California 49; 3 miles north of North San Juan 1371 Comment
  UCSB50207  Petrorhagia dubia Gray, John 1976-4-10 Yuba Along roadside on Loma Rica Road; 4 miles south of Loma Rica 42 Comment
  UCSB55401  Petrorhagia dubia Bivin, Mignonne; Baker, Gail 1978-5-1 Tulare Sequoia National Park; Potwisha Campground; S side of Generals Hwy.; beside Marble Fork 609 Comment
  UCSB63949  Petrorhagia dubia Snodgrass, G. 1981-4-11 Butte Ca. 5 mi. E of Chico; ca. 1/2 miles E of Rockwood Lake entrance on Humbug Rd. (now Honeyrun Rd.) Comment
  UCSC009596  Petrorhagia dubia D. Styer 2012-5-14 75 Monterey Parker Flats Road; Fort Ord Region F6 Comment



  Copyright © 2019 Regents of the University of California — Updated 11 January 2019
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