Search Results — 467 specimen records retrieved (460 records with coordinates)
Results for search: County=SUTTER; Source=All; Collector=Helmkamp;   

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC175461  Cyperus eragrostis G. K. Helmkamp; E. A. Helmkamp 2007-10-28 13116 Sutter Sacramento Valley: along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  CAS-BOT-BC175663  Rosa multiflora G. K. Helmkamp; E. A. Helmkamp 2007-10-28 13115 Sutter Sacramento Valley: along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  CAS-BOT-BC224892  Polygonum aviculare George K. Helmkamp; E. A. Helmkamp 2010-10-20 17036 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  CAS-BOT-BC226907  Physalis lancifolia George K. Helmkamp; E. A. Helmkamp 2010-10-20 17038 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  CAS-BOT-BC226908  Atriplex dioica George K. Helmkamp; E. A. Helmkamp 2010-10-20 17035 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  CAS-BOT-BC227089  Epilobium brachycarpum George K. Helmkamp; E. A. Helmkamp 2010-10-20 17052 Sutter Sacramento Valley: along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  CAS-BOT-BC227210  Sorghum halepense George K. Helmkamp; E. A. Helmkamp 2010-10-20 17033 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  CAS-BOT-BC516745  Pseudognaphalium luteoalbum George K. Helmkamp; Amy Barnes 2013-3-28 20265 Sutter Sacramento Valley: Hageman Road just S of its jct with CA-20, E of Meridian 17 Comment
  CAS-BOT-BC516746  Triticum aestivum George K. Helmkamp; Amy Barnes 2013-3-28 20268 Sutter Sacramento Valley: Hageman Road just S of its jct with CA-20, E of Meridian 17 Comment
  CAS-BOT-BC516747  Planodes virginica George K. Helmkamp; Amy Barnes 2013-3-28 20278 Sutter Sacramento Valley: Hageman Road just S of its jct with CA-20, E of Meridian 17 Comment
  CAS-BOT-BC536081  Amaranthus albus G. K. Helmkamp; E. A. Helmkamp 2011-11-28 18495 Sutter Sacramento Valley: Sacramento Ave., 0.2 mi from its jct with CA-99, 0.75 mi NW of Nicolaus, betside the levee of the FEather River 20 Comment
  CDA25207  Alisma lanceolatum G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13122 Sutter Sacramento Valley; Along Nicolaus Road, 0.1 mile west of the Placer County line. Comment
  CDA25210  Rosa gymnocarpa G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13115 Sutter Sacramento Valley; Along Nicolaus Road, 0.1 mile west of the Placer County line. Comment
  CDA25211  Ambrosia psilostachya G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13114 Sutter Sacramento Valley; Along Nicolaus Road at Coon Creek, 0.9 mile west of Placer County line. Comment
  CDA25216  Polygonum punctatum G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13121 Sutter Sacramento Valley; Along Nicolaus Road, 0.1 mile west of the Placer County line. Comment
  CDA25244  Vicia villosa subsp. varia G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13124 Sutter Sacramento Valley; Along Nicolaus Road, 0.1 mile west of the Placer County line. Comment
  CDA25624  Cyperus eragrostis G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13116 Sutter Sacramento Valley; Along Nicolaus Road, 0.1 mile west of the Placer County line. Comment
  CDA25630  Phoradendron macrophyllum G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13111 Sutter Sacramento Valley; Along Nicolaus Road at Coon Creek, 0.9 mile west of Placer County line. Comment
  CDA25633  Eclipta prostrata G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13117 Sutter Sacramento Valley; Along Nicolaus Road, 0.1 mile west of the Placer County line. Comment
  CDA25790  Polygonum persicaria G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13120 Sutter Sacramento Valley; Along Nicolaus Road, 0.1 mile west of the Placer County line. Comment
  CDA25793  Verbena brasiliensis G. K. Helmkamp, E. A. HelmkampAug 2007-10-28 13123 Sutter Sacramento Valley; Along Nicolaus Road, 0.1 mile west of the Placer County line. Comment
  OBI81419  Triticum aestivum George K. Helmkamp, Amy Barnes 2013-3-28 20268 Sutter Sacramento Valley; Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  OBI81420  Avena barbata George K. Helmkamp, Amy Barnes 2013-3-28 20269 Sutter Sacramento Valley; Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  OBI82125  Matricaria discoidea George K. Helmkamp 2013-3-9 20164 Sutter North Butte Road, 0.2 mile east of its junction with West Butte Road, NW foot of Sutter Buttes 26 Comment
  OBI83555  Calandrinia menziesii George K. Helmkamp, Amy Barnes 2013-3-28 20274 Sutter Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  OBI83557  Pseudognaphalium luteoalbum George K. Helmkamp, Amy Barnes 2013-3-28 20265 Sutter Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  RSA0012108  Rosa gymnocarpa George K. Helmkamp, E. A. Helmkamp 2010-10-20 17046 Sutter along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  RSA0035741  Lepidium nitidum var. nitidum George K. Helmkamp 2013-3-9 20157 Sutter West Butte Road, 5.5 miles north of its junction with West Butte Pass Road, NW foot of Sutter Buttes 24 Comment
  RSA0036009  Salix lasiolepis George K. Helmkamp 2013-3-9 20160 Sutter North Butte Road, 0.4 mile west of its junction with West Butte Road, NW foot of Sutter Buttes 24 Comment
  RSA0036010  Bromus diandrus George K. Helmkamp 2013-3-9 20159 Sutter North Butte Road, 0.4 mile west of its junction with West Butte Road, NW foot of Sutter Buttes 24 Comment
  RSA0106511  Bromus diandrus George K. Helmkamp, Amy Barnes 2014-3-21 22618 Sutter Sacramento Valley: 2.8 miles WSW (257 deg ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  RSA0106512  Amsinckia intermedia George K. Helmkamp, Amy Barnes 2014-3-21 22620 Sutter Sacramento Valley: 2.8 miles WSW (257 deg ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  RSA0106513  Festuca perennis George K. Helmkamp, Amy Barnes 2014-3-21 22622 Sutter Sacramento Valley: 2.8 miles WSW (257 deg ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  RSA0115710  Rorippa palustris subsp. palustris George K. Helmkamp, Amy Barnes 2014-3-21 22604 Sutter Sacramento Valley: along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air miles SW of Sutter. 13 Comment
  RSA0115712  Geranium carolinianum George K. Helmkamp, Amy Barnes 2014-3-21 22592 Sutter Sacramento Valley: along CA-20 (Colusa Hwy). 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter. 13 Comment
  RSA0115745  Erodium moschatum George K. Helmkamp, Amy Barnes 2014-3-21 22591 Sutter Sacramento Valley: along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter. 13 Comment
  RSA0115746  Lepidium strictum George K. Helmkamp, Amy Barnes 2014-3-21 22601 Sutter Sacramento Valley: along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter. 13 Comment
  RSA0115747  Gazania linearis George K. Helmkamp, Amy Barnes 2014-3-21 22606 Sutter Sacramento Valley: Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian. 13 Comment
  RSA0115748  Poa annua George K. Helmkamp, Amy Barnes 2014-3-21 22594 Sutter Sacramento Valley: along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter. 13 Comment
  RSA746975  Aster subulatus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13058 Sutter Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  RSA747028  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13049 Sutter Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  RSA747474  Oenothera glazioviana George K. Helmkamp, E. A. Helmkamp 2007-9-30 13041 Sutter Sacramento Valley: Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 8 Comment
  RSA749528  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2008-10-6 14216 Sutter South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City. 23 Comment
  RSA749530  Amaranthus blitoides George K. Helmkamp, E. Helmkamp 2008-10-6 14213 Sutter South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  RSA749531  Platanus X acerifolia George K. Helmkamp, E. A. Helmkamp 2008-10-6 14220 Sutter Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter 56 Comment
Read comments
May 5 2014
  RSA749725  Acer negundo var. californicum George K. Helmkamp, E. A. Helmkamp 2008-10-6 14224 Sutter Pass Road at the south side of Sutter Buttes, beside Butte Slough, 9.2 miles west of Sutter 32 Comment
  RSA749728  Helianthus bolanderi George K. Helmkamp, E. A. Helmkamp 2008-10-6 14219 Sutter Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter 56 Comment
  RSA749729  Hemizonia George K. Helmkamp, E. A. Helmkamp 2008-10-6 14222 Sutter Pass Road on the south side of Sutter Buttes, 6.9 miles west of Sutter 84 Comment
  RSA749733  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2008-10-6 14223 Sutter Pass Road on the south side of Sutter Buttes, 6.9 miles west of Sutter 84 Comment
  RSA755855  Platanus X acerifolia George K. Helmkamp, E. A. Helmkamp 2008-10-6 14220 Sutter Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter 56 Comment
  RSA781580  Juglans californica var. hindsii George K. Helmkamp, E. A. Helmkamp 2009-8-30 15566 Sutter Trowbridge, along Nicolaus Ave. just east of the Western Pacific railroad tracks, c. 0.1 mile east of Pacific Ave. 15 Comment
  RSA787271  Juglans californica var. hindsii George K. Helmkamp, E. A. Helmkamp 2009-8-30 15566 Sutter Trowbridge, along Nicolaus Ave. just east of the Western Pacific railroad tracks, c. 0.1 mile east of Pacific Ave. 15 Comment
  RSA795179  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2011-5-12 17260 Sutter along Catlett Road immediately west of the Placer County line, 1.65 mi. NE (20 deg ) of Pleasant Grove 15 Comment
  SBBG128855  Vicia sativa subsp. sativa G. K. Helmkamp, E. A. Helmkamp 2011-5-12 17283 Sutter 0.1 mi SW of village of Nicolaus on 1st St, beside the Feather River, Sacramento Valley 9 Comment
  SD197850  Platanus acerifolia G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14220 Sutter Sacramento Valley: Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter. 56 Comment
  SD212423  Bromus hordeaceus G. K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10144 Sutter Sutter Buttes, north end of Great Valley; 5.6 miles westnorthwest of Sutter along Pass Road on the south end of Sutter Buttes. 68 Comment
  SD234541  Tribulus terrestris G. K. Helmkamp, E. A. Helmkamp 2007-9-30 13044 Sutter Sacramento Valley: Oak Ave, at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 7 Comment
  SD236155  Acer negundo var. californicum G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14224 Sutter Sacramento Valley: Pass Road at the south side of Sutter Buttes, beside Butte Slough, 9.2 miles west of Sutter 32 Comment
  SD236157  Amaranthus blitoides G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14213 Sutter Sacramento Valley: South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 22 Comment
  SD236174  Artemisia douglasiana G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14226 Sutter Sacramento Valley: Pass Road at the south side of Sutter Buttes, beside Butte Slough, 9.2 miles west of Sutter 32 Comment
  SD236195  Helianthus bolanderi G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14219 Sutter Sacramento Valley: Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter 56 Comment
  SD236196  Hemizonia congesta subsp. calyculata G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14222 Sutter Sacramento Valley: Pass Road on the south side of Sutter Buttes, 6.9 miles west of Sutter 84 Comment
  SD236198  Centromadia fitchii G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14223 Sutter Sacramento Valley: Pass Road on south side of Sutter Buttes, 6.9 miles west of Sutter 84 Comment
  SD236301  Vicia villosa subsp. villosa G. K. Helmkamp, E. A. Helmkamp 2008-4-17 13277 Sutter Sacramento Valley: along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter. 70 Comment
  SD236356  Platanus acerifolia G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14220 Sutter Sacramento Valley: Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter. 56 Comment
  SD236381  Polygonum aviculare G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14216 Sutter Sacramento Valley: South Butte Road 1.2 miles northwest of junction with CA-20 west of Yuba City. 22 Comment
  SD236443  Vitis californica G. K. Helmkamp, E. A. Helmkamp 2008-4-17 13278 Sutter Sacramento Valley: along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  SD237281  Amaranthus retroflexus G. K. Helmkamp, E. A. Helmkamp 2009-8-30 15546 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86a^z) of Nicolaus. 7 Comment
  SD239537  Oryza sativa George K. Helmkamp, E. A. Helmkamp 2009-8-30 15556 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86a^z) on Nicolaus (Shericen 7.5'Q) 7 Comment
  SD239812  Ammannia coccinea George K. Helmkamp, E. A. Helmkamp 2010-10-20 17051 Sutter Sacramento Valley: along Nicolaus Ave., 0.5 miles east of Trowbridge (Nicolaus 7.5'Q) 14 Comment
  SD240910  Xanthium spinosum George K. Helmkamp, E. A. Helmkamp 2011-11-28 18496 Sutter Sacramento Valley: Sacramento Ave., 0.2 miles from its junction with CA-99, 0.75 mile NW of Nicolaus, beside the levee of the Feather River (Nicolaus 7.5'Q) 20 Comment
  SD240963  Stellaria media George K. Helmkamp, E. A. Helmkamp 2011-5-12 17274 Sutter Sacramento Valley: Garden Highway at the junction with Garwood Road, c. 1 mi SW of Nicolaus (Nicoaus 7.5'Q) 10 Comment
  SD240969  Atriplex dioica George K. Helmkamp, E. A. Helmkamp 2010-10-20 17035 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave;, 2 miles SE (105a^z) of Trowbridge (Sheridan 7.5'Q) 17 Comment
  SD243058  Amaranthus blitoides George K. Helmkamp, E. A. Helmkamp 2011-10-8 18405 Sutter Northern Sacramento Valley: Live Oak, Larkin Road, 0.3 mile south of Live Oak and just west of CA-99. 34 Comment
  SD243148  Vicia benghalensis George K. Helmkamp, E. A. Helmkamp 2011-5-12 17267 Sutter Sacramento Valley: Howsley Reoad at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove (Verona 7.5'Q) 29 Comment
  SD243174  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2011-10-8 18404 Sutter Northern Sacramento Valley: Live Oak, Larkin Road, 0.3 mile south of Live Oak and just west of CA-99. 34 Comment
  SD244135  Stellaria media George K. Helmkamp, E. A. Helmkamp 2011-5-12 17274 Sutter Sacramento Valley: Garden Highway at the junction with Garwood Road, c. 1 mile SW of Nicolaus (Nicolaus 7.5'Q) 10 Comment
  SD248363  Sibara virginica George K. Helmkamp, Amy Barnes 2013-3-28 20278 Sutter Sacramento Valley: Hageman Road just south of its junction with CA-20, east of Meridian (Sutter Buttes 7.5'Q) 17 Comment
  SD248484  Calandrinia ciliata George K. Helmkamp, Amy Barnes 2013-3-28 20274 Sutter Sacramento Valley: Hageman Road just south of its juncton with CA-20, east of Meridian (Sutter Buttes 7.5'Q) 17 Comment
  SD255606  Avena barbata George K. Helmkamp 2014-3-21 22623 Sutter Sacramento Valley: 2.8 miles WSW (257a^z) of Sutter, along CA-20 at the junction with Morehead Road. (Sutter Buttes 7.5'Q) 10 Comment
  SD255648  Gazania linearis George K. Helmkamp, Amy Barnes 2014-3-21 22606 Sutter Sacramento Valley: Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian (Sutter Buttes 7.5'Q) 13 Comment
  SD255667  Amsinckia intermedia George K. Helmkamp, Amy Barnes 2014-3-21 22620 Sutter Sacramento Valley: 2.8 miles WSW (257a^z) of Sutter, along CA-20 at the juncction with Morehead Road. (Sutter Buttes 7.5'Q) 10 Comment
  SD255687  Lepidium strictum George K. Helmkamp, Amy Barnes 2014-3-21 22601 Sutter Sacramento Valley: along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter (Sutter Buttes 7.5'Q) 13 Comment
  SD255689  Rorippa palustris var. palustris George K. Helmkamp, Amy Barnes 2014-3-21 22604 Sutter Sacramento Valley: along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter (Sutter Buttes 7.5'Q) 13 Comment
  SD255736  Lupinus bicolor George K. Helmkamp, Amy Barnes 2014-3-21 22617 Sutter Sacramento Valley; 2.8 miles WSW of Sutter along CA 20 at the junctionwith Morehead Rd. 10 Comment
  SD255850  Salix lasiolepis George K. Helmkamp, Amy Barnes 2014-3-21 22609 Sutter Sacramento Valley: Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian. Grassy strip between CA-20 and a parallel orchard road. 13 Comment
  SD257137  Hordeum murinum subsp. glaucum George K. Helmkamp, Amy Barnes 2014-3-21 22597 Sutter Sacremento Valley: along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air miles SW of Sutter (Sutter 7.5'Q) 13 Comment
  SD257228  Lepidium nitidum var. nitidum George K. Helmkamp, Amy Barnes 2014-3-21 22600 Sutter Sacramento Valley, along CA-20 (Colusa Highway ), 1.3 miles west of its junction with Acacia Ave., 1.7 air miles SW of Sutter. 13 Comment
  SD257235  Raphanus sativus George K. Helmkamp, Amy Barnes 2014-3-21 22612 Sutter Sacramento Valley, along CA 20 (Colusa Highway), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian. 13 Comment
  SEINET11265850  Epilobium brachycarpum George Helmkamp, E. A. Helmkamp 2010-10-20 17034 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (1051/4) of Trowbridge (Sheridan 7.5' Q.); 0 17 Comment
  SEINET13203094 Image available Erodium moschatum George K. Helmkamp, Amy Barnes 2014-1 22591 Sutter Sacramento Valley: aling CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter (Sutter Buttes 7.5' Q.) 13 Comment
  SEINET13203103 Image available Medicago polymorpha George K. Helmkamp, Amy Barnes 2014-1 22599 Sutter Sacramento Valley: aling CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter (Sutter Buttes 7.5' Q.) 13 Comment
  SEINET13203104 Image available Hordeum murinum subsp. glaucum George K. Helmkamp, Amy Barnes 2014-1 22597 Sutter Sacramento Valley: aling CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter (Sutter Buttes 7.5' Q.) 13 Comment
  SEINET13276772 Image available Quercus lobata G. K. Helmkamp, E. A. Helmkamp 2007-1 13038 Sutter Sacramento Valley: Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road (Sutter Buttes 7.5' Q.) 70 Comment
  SEINET1908455  Brassica rapa G. K. Helmkamp, E. A. Helmkamp 2008-1 13136 Sutter Sacramento Valley: Sutter Basin; junction of Ca-20 and South Butte Rd, west of Yuba City. 19 Comment
  SEINET1908456  Echinochloa crus-galli G. K. Helmkamp, E. A. Helmkamp 2008-1 14215 Sutter Sacramento Valley: South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City. 23 Comment
  SEINET1908457  Acer negundo var. californicum G. K. Helmkamp, E. A. Helmkamp 2008-1 14224 Sutter Sacramento Valley: Pass Road at the south side of Sutter Buttes, beside Butte Slough, 9.2 miles wes tof Sutter. 32 Comment
  SEINET1908658  Hemizonia congesta subsp. calyculata G. K. Helmkamp, E. A. Helmkamp 2008-1 14222 Sutter Sacramento Valley: Pass Road on the south side of Sutter Buttes, 6.9 miles west of Sutter. 84 Comment
  SEINET1908710  Amsinckia intermedia G. K. Helmkamp, E. A. Helmkamp 2008-1 13135 Sutter Sacramento Valley, Sutter Basin: Junction of CA-20 and South Butte Rd. west of Yuba City 19 Comment
  SEINET1908713  Raphanus sativus G. K. Helmkamp, E. A. Helmkamp 2008-1 13137 Sutter Sacramento Valley: Sutter Basin; Junction of CA-20 and South Butte Rd. west of Yuba City 19 Comment
  SEINET2042546 Image available Chamaesyce glyptosperma George K. Helmkamp, E. A. Helmkamp 1999-6-29 5052 Sutter Corner of Dry Creek Rd. & Bowman Rd, near Nielsburg, 3 mi NE of Auburn besdie I-80 & 1.5 NW of North Fork Lake on American River. (Auburn Quad 7.5'). T13N R 8 E S24 (SW/4) 457 Comment
  SEINET2473443 Image available Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2009-1 15564 Sutter Sacramento Valley; along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  SEINET2473444 Image available Leptochloa uninervia George K. Helmkamp, E. A. Helmkamp 2009-1 15559 Sutter Sacramento Valley; along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  SEINET2473466 Image available Leptochloa fascicularis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15565 Sutter Sacramento Valley; along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  SEINET2473469 Image available Cynodon dactylon George K. Helmkamp, E. A. Helmkamp 2009-8-30 15550 Sutter Sacramento Valley; along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  SEINET3237952 Image available Polygonum punctatum 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. 12 Comment
  SEINET3238894 Image available Avena sativa George K. Helmkamp, E. A. Helmkamp 2008-3-6 13133 Sutter Sacramento Valley: Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City. 19 Comment
  SEINET3238895 Image available Erodium botrys George K. Helmkamp, E. A. Helmkamp 2008-3-6 13140 B Sutter Sacramento Valley: Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City. 19 Comment
  SEINET3238896 Image available Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2008-3-6 13141 Sutter Sutter Basin, Sutter Buttes: West Butte Road 2.3 miles northwest of its junction with CA-20, south edge of Sutter Buttes. 22 Comment
  SEINET3245626  Conyza bonariensis G. K. Helmkamp, E. A. Helmkamp 2009-1 15547 Sutter Sacramento Valley; along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus (Sheridan 7.5') 8 Comment
  SEINET3245628  Eclipta prostrata G. K. Helmkamp, E. A. Helmkamp 2009-1 15557 -B Sutter Sacramento Valley; along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus (Sheridan 7.5') 8 Comment
  SEINET3245634  Cynodon dactylon G. K. Helmkamp, E. A. Helmkamp 2009-1 15550 Sutter Sacramento Valley; along Nicolaus Ave., 2.2 miles northwestof the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus (Sheridan 7.5') 8 Comment
  SEINET3245710  Epilobium brachycarpum G. K. Helmkamp, E. A. Helmkamp 2007-1 13034 Sutter Sacramento Valley: Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
  SEINET3245713  Polygonum aviculare G. K. Helmkamp, E. A. Helmkamp 2007-1 13037 Sutter Sacramento Valley: Sutter Buttes. 2.3 miles northwest of Sutter on Pass Road 70 Comment
  SEINET3245715  Centaurea solstitialis G. K. Helmkamp, E. A. Helmkamp 2007-1 13029 Sutter Central Valley; Sacramento Valley; American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  SEINET3245717  Symphyotrichum subulatum G. K. Helmkamp, E. A. Helmkamp30 2007-1 13024 Sutter Central Valley; Sacramento Valley; American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  SEINET3245765  Brassica geniculata G. K. Helmkamp, E. A. Helmkamp 2007-1 13026 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  SEINET3245833  Diplachne fusca var. uninervia G. K. Helmkamp, E. A. Helmkamp 2009-1 15559 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus (Sheridan 7.5') 8 Comment
  SEINET3245867  Convolvulus arvensis G. K. Helmkamp, E. A. Helmkamp 2009-1 15560 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus. 8 Comment
  SEINET3245869  Lactuca serriola G. K. Helmkamp, E. A. Helmkamp 2009-1 15562 Sutter Sacramento Valley: along Nicolaus Ave. 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus. 8 Comment
  SEINET3245871  Conyza canadensis G. K. Helmkamp, E. A. Helmkamp 2009-1 15563 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus. 8 Comment
  SEINET3246118  Daucus carota G. K. Helmkamp, E. A. Helmkamp 2009-1 15553 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus. 8 Comment
  SEINET3246119  Ammannia robusta G. K. Helmkamp, E. A. Helmkamp 2009-1 15555 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus. 8 Comment
  SEINET3246136 Image available Oryza sativa G. K. Helmkamp, E. A. Helmkamp 2009-1 15556 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus. 8 Comment
  SEINET3246138  Cynodon dactylon G. K. Helmkamp, E. A. Helmkamp 2007-1 13047 Sutter Sacramento Valley: Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing 8 Comment
  SEINET3257991 Image available Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2008-3-6 13139 Sutter Sacramento Valley; Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City. 19 Comment
  SEINET3257992 Image available Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2008-3-6 13138 Sutter Sacramento Valley; Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City. 19 Comment
  SEINET3257994 Image available Avena barbata George K. Helmkamp, E. A. Helmkamp 2008-3-6 13143 Sutter Sutter Basin, Sutter Buttes; West Butte Road 2.3 miles northwest of its junction with CA-20, south edge of Sutter Buttes. 22 Comment
  SEINET3285082 Image available Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-9-30 13051 Sutter Sacramento Valley; Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  SEINET3285083 Image available Cyperus difformis George K. Helmkamp, E. A. Helmkamp 2007-9-30 13053 Sutter Sacramento Valley; Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  SEINET3285084 Image available Vicia villosa subsp. varia George K. Helmkamp, E. A. Helmkamp 2007-9-30 13046 Sutter Sacramento Valley; Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 8 Comment
  SEINET3285085 Image available Cynodon dactylon George K. Helmkamp, E. A. Helmkamp 2007-9-30 13047 Sutter Sacramento Valley; Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 8 Comment
  SEINET3285086 Image available Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2007-9-30 13043 Sutter Sacramento Valley; Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 8 Comment
  SEINET3285087 Image available Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13045 Sutter Sacramento Valley; Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 8 Comment
  SEINET3828399  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2011-1 18489 Sutter Sacramento Valley: Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles SW of Nicolaus (Verona 7.5') 14 Comment
  SEINET3828546  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2011-1 18485 Sutter Sacramento Valley: Garden Hwy at the southwest end of the village of Nicolaus (Nicolaus 7.5') 18 Comment
  SEINET3828582  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2011-1 18490 Sutter Sacramento Valley: Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles SW of Nicolaus (Verona 7.5') 14 Comment
  SEINET3856758 Image available Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2010-10-20 17036 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile N of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE of Trowbridge 17 Comment
  SEINET3856760 Image available Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2010-10-20 17037 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile N of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE of Trowbridge 17 Comment
  SEINET3856762 Image available Physalis lancifolia George K. Helmkamp, E. A. Helmkamp 2010-10-20 17038 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile N of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE of Trowbridge 17 Comment
  SEINET3856764 Image available Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2010-10-20 17039 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile N of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE of Trowbridge 17 Comment
  SEINET3856766 Image available Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2010-10-20 17033 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile N of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE of Trowbridge 17 Comment
  SEINET3856776 Image available Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2010-10-20 17052 Sutter Sacrament Valley: along Nicolalus Ave. 0.5 miles E of Trowbridge 15 Comment
  SEINET3866229  Equisetum laevigatum George K. Helmkamp, E. A. Helmkamp 2007-10-28 13127 Sutter Sacramento Valley: between Nicolaus and CA-99, 0.1 mile southwest of Nicolaus (Nicolaus 7.5' Q). Levee along the Feather River and adjacent orchards with wet irrigation ditches.; 0 11 Comment
  SEINET3909453  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2007-10-28 13116 Sutter Sacramento Vallet: along Nicolaus Road, 0.1 mile west of the Placer County line.; 0 12 Comment
  SEINET3919646  Avena barbata George K. Helmkamp, E. A. Helmkamp 2008-3-6 13143 Sutter Sutter Basin, Sutter Buttes: West Butte Road 2.3 miles northwest of its junction with CA-20, south edge of Sutter buttes.; 0 22 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
  SEINET4560743  Vicia benghalensis George K. Helmkamp, E. A. Helmkamp 2011-1 17267 Sutter Sacramento Valley: Howsley Road at CA-99/El centro Blvd., 3.3 miles west of Pleasant Grove. 30 Comment
  SEINET4560783  Galium aparine George K. Helmkamp, E. A. Helmkamp 2011-1 17279 Sutter Sacramento Valley: 0.1 mile southwest of village of Nicolaus on 1st street, beside the Feather River 9 Comment
  SEINET4560816  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2011-1 17286 Sutter Sacramento Valley: junction of Nicolaus Road and Pleasant Grove Road, 2 miles ESE (97 degrees) of Trowbridge. 16 Comment
  SEINET4560819  Rumex pulcher George K. Helmkamp, E. A. Helmkamp 2011-1 17285 Sutter Sacramento Valley: junction of Nicolaus Road and Pleasant Grove Road, 2 miles ESE (97 degrees) of Trowbridge. 16 Comment
  SEINET4691713  Equisetum laevigatum George K. Helmkamp 2011-1 17281 Sutter Sacramento Valley: 0.1 mile southwest of village of Nicolaus on 1st street, beside the Feather River 9 Comment
  SEINET4691714  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2011-1 17283 Sutter Sacramento Valley: 0.1 mile southwest of village of Nicolaus on 1st street, beside the Feather River 9 Comment
  SEINET4691715  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-1 17265 Sutter Sacramento Valley: Pleasant grove, along Howsley Road opposite pl. Gr elementary School, 1.0 mile west of Pleasant Grove Road and just west of the Post office 15 Comment
  SEINET4691716  Medicago polymorpha George K. Helmkamp 2011-1 17260 Sutter Southern Sacramento Valley: along Catlett Road immediatly west of the Placer County Line 1.65 mi NE (20 degrees) of Pleasant Grove 15 Comment
  SEINET4691729  Stellaria media George K. Helmkamp, E. A. Helmkamp 2011-1 17274 Sutter Sacramento Valley: Garden Highway at the junction with Garwood Road, c. 1 mi. SW of Nicolaus. 11 Comment
  SEINET4691730  Lythrum hyssopifolia George K. Helmkamp, E. A. Helmkamp 2011-1 17264 Sutter Sacramento Valley: Pleasant grove, along Howsley Road opposite pl. Gr elementary School, 1.0 mile west of Pleasant Grove Road and just west of the Post office 15 Comment
  SEINET8043932 Image available Abutilon theophrasti George K. Helmkamp, E. A. Helmkamp 2011-1 18487 Sutter Sacramento Valley: Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles SW of Nicolaus. 14 Comment
  UCD100037  Polygonum aviculare subsp. depressum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13027 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line. 3 Comment
  UCD100043  Polygonum aviculare subsp. depressum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13037 Sutter Sacramento Valley: Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road. 3 Comment
  UCD102862  Ammannia robusta G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13055 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCD105371  Epilobium brachycarpum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13030 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line. 3 Comment
  UCD105372  Epilobium brachycarpum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13034 Sutter Sacramento Valley: Sutter Buttes, 2.3 miles NW of Sutter on Pass Road. 70 Comment
  UCD105373  Epilobium brachycarpum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13051 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCD106872  Oenothera glazioviana G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13041 Sutter Sacramento Valley: Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 8 Comment
  UCD107241  Lupinus bicolor G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10146 Sutter Sutter Buttes, N end of Great Valley: 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes. 69 Comment
  UCD107396  Tribulus terrestris G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13044 Sutter Sacramento Valley. Oak Ave. at its junction with CA-99, about 2.8 miles N of the Feather River crossing. 8 Comment
  UCD108009  Melilotus albus G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13050 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCD109125  Vicia villosa subsp. varia G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13046 Sutter Sacramento Valley: Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 8 Comment
  UCD114514  Cardamine hirsuta G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10138 Sutter Sutter Buttes, N end of Great Valley; 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes. 69 Comment
  UCD115114  Hirschfeldia incana G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13026 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line. 3 Comment
  UCD119676  Amsinckia intermedia G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10134 Sutter Sutter Buttes, N end of Great Valley: 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes. 69 Comment
  UCD120897  Plagiobothrys nothofulvus G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10140 Sutter Sutter Buttes, N end of Great Valley: 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes. 69 Comment
  UCD124589  Plantago lanceolata G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13025 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line. 3 Comment
  UCD126195  Convolvulus arvensis G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13028 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento County line. 3 Comment
  UCD126196  Convolvulus arvensis G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13052 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCD127198  Anthriscus caucalis G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10143 Sutter Sutter Buttes, N end of Great Valley: 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes. 69 Comment
  UCD130095  Centaurea solstitialis G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13029 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and Ca-99, 2.0 miles north of the Sacramento County. 3 Comment
  UCD132903  Helianthus bolanderi G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13035 Sutter Sacramento Valley: Sutter Buttes, 2.3 miles NW of Sutter on Pass Road. 70 Comment
  UCD133020  Heterotheca grandiflora G. K. Helmkamp; E. A. Helmkamp 2007-10-7 13061 Sutter Nothern Sacramento Valley: Sacramento Ave., 1.9 miles east of its junction with CA-99, at the Feather River levee. 12 Comment
  UCD134215  Madia elegans G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13036 Sutter Sacramento Valley: Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road. 70 Comment
  UCD136683  Symphyotrichum subulatum var. parviflorum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13024 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line. 3 Comment
  UCD136685  Symphyotrichum subulatum var. parviflorum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13058 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCD141007  Cyperus difformis G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13053 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCD142110  Croton setiger G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13033 Sutter Sacramento Valley. Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road. 70 Comment
  UCD142631  Euphorbia nutans G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13054 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCD58822  Bromus hordeaceus G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10144 Sutter Sutter Buttes, N end of Great Valley: 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes. 68 Comment
  UCD61310  Quercus lobata G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13038 Sutter Sacramento Valley. Sutter Buttes, 2.3 miles NW of Sutter on Pass Road. 70 Comment
  UCD63219  Quercus douglasii G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13039 Sutter Sacramento Valley. Sutter Buttes, 2.3 miles NW of Sutter on Pass Road. 70 Comment
  UCD74338  Cynodon dactylon G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13047 Sutter Sacramento Valley. Oak Ave. at its junction with CA-99, about 2.8 miles N of the Feather River crossing. 8 Comment
  UCD92662  Sorghum halepense G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13043 Sutter Sacramento Valley. Oak Ave. at its junction with CA-99, about 2.8 miles N of the Feather River crossing. 8 Comment
  UCD94866  Typha latifolia G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13057 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCD97159  Amaranthus albus G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13045 Sutter Sacramento Valley. Oak Ave. at its junction with CA-99, about 2.8 miles N of the Feather River crossing. 8 Comment
  UCD97536  Amaranthus powellii G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13042 Sutter Sacramento Valley. Oak Ave. at its junction with CA-99, about 2.8 miles N of the Feather River crossing. 8 Comment
  UCR173372  Bromus hordeaceus George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10144 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173538A  Hypochaeris glabra George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10135 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173538B  Amsinckia intermedia George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10134 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173539  Plagiobothrys nothofulvus George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10136 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173540  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10137 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173541  Matricaria matricarioides George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10139 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173542  Cardamine hirsuta George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10138 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173543  Plagiobothrys nothofulvus George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10140 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173544  Amsinckia intermedia George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10141 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173649  Erodium botrys George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10142 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173671  Anthriscus caucalis George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10143 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173776  Lupinus bicolor George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10146 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR173777  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10145 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR188481  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13050 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188482  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-9-30 13051 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188483  Convolvulus arvensis George K. Helmkamp, E. A. Helmkamp 2007-9-30 13052 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188484  Cyperus difformis George K. Helmkamp, E. A. Helmkamp 2007-9-30 13053 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188485  Euphorbia nutans George K. Helmkamp, E. A. Helmkamp 2007-9-30 13054 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188486  Ammannia robusta George K. Helmkamp, E. A. Helmkamp 2007-9-30 13055 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188487  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2007-9-30 13056 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188488  Typha latifolia George K. Helmkamp, E. A. Helmkamp 2007-9-30 13057 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188489  Vicia villosa subsp. varia George K. Helmkamp, E. A. Helmkamp 2007-9-30 13046 Sutter Sacramento Valley, Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing 8 Comment
  UCR188490  Cynodon dactylon George K. Helmkamp, E. A. Helmkamp 2007-9-30 13047 Sutter Sacramento Valley, Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing 8 Comment
  UCR188491  Malvella leprosa George K. Helmkamp, E. A. Helmkamp 2007-9-30 13048 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188492  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13049 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188493  Oenothera glazioviana George K. Helmkamp, E. A. Helmkamp 2007-9-30 13041 Sutter Sacramento Valley, Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing 8 Comment
  UCR188494  Amaranthus powellii George K. Helmkamp, E. A. Helmkamp 2007-9-30 13042 Sutter Sacramento Valley, Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing 8 Comment
  UCR188495  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2007-9-30 13043 Sutter Sacramento Valley, Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing 8 Comment
  UCR188496  Tribulus terrestris George K. Helmkamp, E. A. Helmkamp 2007-9-30 13044 Sutter Sacramento Valley, Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing 8 Comment
  UCR188497  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13045 Sutter Sacramento Valley, Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing 8 Comment
  UCR188566  Aster subulatus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13058 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR188568  Oenothera biennis George K. Helmkamp, E. A. Helmkamp 2007-10-7 13062 Sutter Northern Sacramento Valley, Sacramento Ave. 1.9 miles east of its junction with CA-99, at the Feather River levee 12 Comment
  UCR188569  Heterotheca grandiflora George K. Helmkamp, E. A. Helmkamp 2007-10-7 13061 Sutter Northern Sacramento Valley, Sacramento Ave. 1.9 miles east of its junction with CA-99, at the Feather River levee 12 Comment
  UCR188877  Prunus dulcis George K. Helmkamp, E. A. Helmkamp 2007-9-30 13040 Sutter Sacramento Valley, Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
  UCR188879  Quercus douglasii George K. Helmkamp, E. A. Helmkamp 2007-9-30 13039 Sutter Sacramento Valley, Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
  UCR188880  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2007-9-30 13038 Sutter Sacramento Valley, Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
  UCR190153  Brassica geniculata George K. Helmkamp, E. A. Helmkamp 2007-9-30 13026 Sutter Central Valley; Sacramento Valley, American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  UCR190162  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2007-9-30 13027 Sutter Central Valley; Sacramento Valley, American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  UCR190231  Aster subulatus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13024 Sutter Central Valley; Sacramento Valley, American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  UCR190232  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2007-9-30 13029 Sutter Central Valley; Sacramento Valley, American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  UCR190233  Convolvulus arvensis George K. Helmkamp, E. A. Helmkamp 2007-9-30 13028 Sutter Central Valley; Sacramento Valley, American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  UCR190234  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2007-9-30 13037 Sutter Sacramento Valley, Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
Read comments
Dec 5 2010
  UCR190235  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-9-30 13034 Sutter Sacramento Valley, Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
  UCR190236  Croton setiger George K. Helmkamp, E. A. Helmkamp 2007-9-30 13033 Sutter Sacramento Valley, Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
  UCR190331  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2007-9-30 13032 Sutter Sacramento Valley, Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
  UCR190332  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2007-9-30 13031 Sutter Central Valley; Sacramento Valley, American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  UCR190333  Madia elegans subsp. densifolia George K. Helmkamp, E. A. Helmkamp 2007-9-30 13036 Sutter Sacramento Valley, Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
  UCR190334  Helianthus bolanderi George K. Helmkamp, E. A. Helmkamp 2007-9-30 13035 Sutter Sacramento Valley, Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road 70 Comment
  UCR190335  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-9-30 13030 Sutter Central Valley; Sacramento Valley, American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  UCR190477  Plantago lanceolata George K. Helmkamp, E. A. Helmkamp 2007-9-30 13025 Sutter Central Valley; Sacramento Valley, American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  UCR194709  Foeniculum vulgare George K. Helmkamp, E. A. Helmkamp 2007-10-28 13113 Sutter Sacramento Valley, along Nicolaus Road at Coon Creek, 0.9 mi west of Placer County line 18 Comment
  UCR194710  Polygonum lapathifolium George K. Helmkamp, E. A. Helmkamp 2007-10-28 13119 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR194711  Vicia villosa subsp. varia George K. Helmkamp, E. A. Helmkamp 2007-10-28 13124 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR194712  Cephalanthus occidentalis var. californicus George K. Helmkamp, E. A. Helmkamp 2007-10-28 13112 Sutter Sacramento Valley, along Nicolaus Road at Coon Creek, 0.9 mi west of Placer County line 18 Comment
  UCR194713  Phoradendron macrophyllum George K. Helmkamp, E. A. Helmkamp 2007-10-28 13111 Sutter Sacramento Valley, along Nicolaus Road at Coon Creek, 0.9 mi west of Placer County line 18 Comment
  UCR194714  Verbena litoralis George K. Helmkamp, E. A. Helmkamp 2007-10-28 13123 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR194715  Oryza sativa George K. Helmkamp, E. A. Helmkamp 2007-10-28 13118 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR194887  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2007-10-28 13125 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR194888  Equisetum laevigatum George K. Helmkamp, E. A. Helmkamp 2007-10-28 13127 Sutter Sacramento Valley, between Nicolaus and CA-99, 0.1 mile southwest of Nicolaus 11 Comment
  UCR194889  Equisetum laevigatum George K. Helmkamp, E. A. Helmkamp 2007-10-28 13126 Sutter Sacramento Valley, between Nicolaus and CA-99, 0.1 mile southwest of Nicolaus 11 Comment
  UCR194890  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2007-10-28 13114 Sutter Sacramento Valley, along Nicolaus Road at Coon Creek, 0.9 mi west of Placer County line 18 Comment
  UCR194891  Rosa gymnocarpa George K. Helmkamp, E. A. Helmkamp 2007-10-28 13115 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR194892  Eclipta prostrata George K. Helmkamp, E. A. Helmkamp 2007-10-28 13117 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR194893  Polygonum persicaria George K. Helmkamp, E. A. Helmkamp 2007-10-28 13120 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR194894  Alisma lanceolatum George K. Helmkamp, E. A. Helmkamp 2007-10-28 13122 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR195150  Polygonum punctatum 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 12 Comment
  UCR195151  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2007-10-28 13116 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  UCR197382  Spergularia villosa George K. Helmkamp, E. A. Helmkamp 2008-4-17 13274 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCR197383  Triteleia hyacinthina George K. Helmkamp, E. A. Helmkamp 2008-4-17 13276 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCR197384  Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2008-4-17 13277 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCR197385  Vitis californica George K. Helmkamp, E. A. Helmkamp 2008-4-17 13278 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCR197387  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2008-4-17 13273 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCR198409  Sonchus tenerrimus George K. Helmkamp, E. A. Helmkamp 2008-4-17 13280 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCR198412  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2008-4-17 13275 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCR198441  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2008-3-6 13139 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR198442  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2008-3-6 13138 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR198443  Erodium cicutarium George K. Helmkamp, E. A. Helmkamp 2008-3-6 13140 A Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR198444  Crassula connata George K. Helmkamp, E. A. Helmkamp 2008-3-6 13142 Sutter Sutter Basin, Sutter Buttes, West Butte Road 2.3 miles northwest of its junction with CA-20, south edge of Sutter Buttes 22 Comment
  UCR198445  Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2008-3-6 13141 Sutter Sutter Basin, Sutter Buttes, West Butte Road 2.3 miles northwest of its junction with CA-20, south edge of Sutter Buttes 22 Comment
  UCR198446  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2008-3-6 13140 B Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR198447  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2008-3-6 13137 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR198448  Amsinckia intermedia George K. Helmkamp, E. A. Helmkamp 2008-3-6 13135 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR198535  Carex douglasii George K. Helmkamp, E. A. Helmkamp 2008-4-17 13279 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCR198540  Avena sativa George K. Helmkamp, E. A. Helmkamp 2008-3-6 13133 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR198543  Festuca myuros var. hirsuta George K. Helmkamp, E. A. Helmkamp 2008-3-6 13134 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR198550  Avena barbata George K. Helmkamp, E. A. Helmkamp 2008-3-6 13143 Sutter Sutter Basin, Sutter Buttes, West Butte Road 2.3 miles northwest of its junction with CA-20, south edge of Sutter Buttes 22 Comment
  UCR198554  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2008-3-6 13136 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR201527  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2008-10-6 14226 Sutter Sacramento Valley, Pass Road at the south side of Sutter Buttes, beside Butte Slough, 9.2 miles west of Sutter 32 Comment
  UCR201528  Acer negundo var. californicum George K. Helmkamp, E. A. Helmkamp 2008-10-6 14224 Sutter Sacramento Valley, Pass Road at the south side of Sutter Buttes, beside Butte Slough, 9.2 miles west of Sutter 32 Comment
  UCR201567  Cichorium intybus George K. Helmkamp, E. A. Helmkamp 2008-10-6 14225 Sutter Sacramento Valley, Pass Road at the south side of Sutter Buttes, beside Butte Slough, 9.2 miles west of Sutter 32 Comment
  UCR201740  Amaranthus blitoides George K. Helmkamp, E. A. Helmkamp 2008-10-6 14213 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  UCR201741  Xanthium spinosum George K. Helmkamp, E. A. Helmkamp 2008-10-6 14214 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  UCR201760  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2008-10-6 14216 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  UCR201761  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-6 14215 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  UCR201763  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2008-10-6 14217 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  UCR201765  Polygonum punctatum George K. Helmkamp, E. A. Helmkamp 2008-10-6 14218 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  UCR201767  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2008-10-6 14223 Sutter Sacramento Valley, Pass Road on the south side of Sutter Buttes, 6.9 miles west of Sutter 84 Comment
  UCR201768  Helianthus bolanderi George K. Helmkamp, E. A. Helmkamp 2008-10-6 14219 Sutter Sacramento Valley, Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter 56 Comment
  UCR201773  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-6 14221 Sutter Sacramento Valley, Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter 56 Comment
  UCR201774  Platanus acerifolia George K. Helmkamp, E. A. Helmkamp 2008-10-6 14220 Sutter Sacramento Valley, Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter 56 Comment
  UCR201780  Hemizonia congesta subsp. calyculata George K. Helmkamp, E. A. Helmkamp 2008-10-6 14222 Sutter Sacramento Valley, Pass Road on the south side of Sutter Buttes, 6.9 miles west of Sutter 84 Comment
  UCR218947  Leptochloa fascicularis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15565 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR218948  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2009-8-30 15569 Sutter Sacramento Valley, 1 mile north of Trowbridge at the junction of Pacific Ave. and Cornelius Ave. 12 Comment
  UCR218949  Fraxinus latifolia George K. Helmkamp, E. A. Helmkamp 2009-8-30 15567 Sutter Sacramento Valley, along Nicolaus Ave., at the crossing over Coon Creek, just south of the junction with Warren Road, 1.1 mi. SE (103 deg. ) of Trowbridge 14 Comment
  UCR218950  Bidens frondosa George K. Helmkamp, E. A. Helmkamp 2009-8-30 15557 A Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR218951  Leptochloa uninervia George K. Helmkamp, E. A. Helmkamp 2009-8-30 15559 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR218952  Convolvulus arvensis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15560 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR218953  Cichorium intybus George K. Helmkamp, E. A. Helmkamp 2009-8-30 15561 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR218954  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2009-8-30 15562 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR218955  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2009-8-30 15564 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR218956  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15563 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR218957  Ludwigia peploides subsp. montevidensis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15568 Sutter Sacramento Valley, along Nicolaus Ave., at the crossing over Coon Creek, just south of the junction with Warren Road, 1.1 mi. SE (103 deg. ) of Trowbridge 14 Comment
  UCR219114  Juglans californica var. hindsii George K. Helmkamp, E. A. Helmkamp 2009-8-30 15566 Sutter Sacramento Valley, Trowbridge, along Nicolaus Ave. just east of the Western Pacific railroad tracks, c. 0.1 mile east of Pacific Ave. 15 Comment
  UCR219115  Amaranthus retroflexus George K. Helmkamp, E. A. Helmkamp 2009-8-30 15546 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219116  Oryza sativa George K. Helmkamp, E. A. Helmkamp 2009-8-30 15556 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219117  Eclipta prostrata George K. Helmkamp, E. A. Helmkamp 2009-8-30 15557 B Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219118  Verbena litoralis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15551 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219119  Cynodon dactylon George K. Helmkamp, E. A. Helmkamp 2009-8-30 15550 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219120  Euphorbia serpillifolia subsp. hirtula George K. Helmkamp, E. A. Helmkamp 2009-8-30 15549 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219121  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2009-8-30 15548 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219122  Conyza bonariensis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15547 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219123  Cyperus odoratus George K. Helmkamp, E. A. Helmkamp 2009-8-30 15552 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219124  Daucus carota George K. Helmkamp, E. A. Helmkamp 2009-8-30 15553 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219125  Cyperus difformis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15554 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR219126  Ammannia robusta George K. Helmkamp, E. A. Helmkamp 2009-8-30 15555 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR230077  Verbena litoralis George K. Helmkamp, E. A. Helmkamp 2010-10-20 17047 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  UCR230078  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2010-10-20 17048 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  UCR230079  Polygonum lapathifolium George K. Helmkamp, E. A. Helmkamp 2010-10-20 17049 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  UCR230080  Cyperus odoratus George K. Helmkamp, E. A. Helmkamp 2010-10-20 17050 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  UCR230081  Ammannia coccinea George K. Helmkamp, E. A. Helmkamp 2010-10-20 17051 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  UCR230089  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2010-10-20 17052 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  UCR230092  Cichorium intybus George K. Helmkamp, E. A. Helmkamp 2010-10-20 17043 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR230093  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2010-10-20 17044 Sutter Sacramento Valley, along Nicolaus Road/Garden Hwy at the southwest edge of Nicolaus, 0.3 mi. NE of Hwy 99 17 Comment
  UCR230094  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2010-10-20 17045 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  UCR230095  Rosa gymnocarpa George K. Helmkamp, E. A. Helmkamp 2010-10-20 17046 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  UCR230732  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2010-10-20 17034 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR230733  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2010-10-20 17036 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR230734  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2010-10-20 17037 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR230735  Physalis lancifolia George K. Helmkamp, E. A. Helmkamp 2010-10-20 17038 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR230736  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2010-10-20 17039 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR230737  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2010-10-20 17041 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR230741  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2010-10-20 17033 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR230746  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2010-10-20 17042 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR230747  Atriplex subspicata George K. Helmkamp, E. A. Helmkamp 2010-10-20 17035 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR232175  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2011-10-8 18404 Sutter Northern Sacramento Valley, Live Oak, Larkin Road, 0.3 mile south of Live Oak and just west of CA-99 34 Comment
  UCR232176  Amaranthus blitoides George K. Helmkamp, E. A. Helmkamp 2011-10-8 18405 Sutter Northern Sacramento Valley, Live Oak, Larkin Road, 0.3 mile south of Live Oak and just west of CA-99 34 Comment
  UCR232619  Eriochloa contracta George K. Helmkamp, E. A. Helmkamp 2011-10-8 18406 Sutter Northern Sacramento Valley, Live Oak, Larkin Road, 0.3 mile south of Live Oak and just west of CA-99 34 Comment
  UCR233014  Stellaria media George K. Helmkamp, E. A. Helmkamp 2011-5-12 17274 Sutter Sacramento Valley, Garden Highway at the junction with Garwood Road, c. 1 mi. SW of Nicolaus 11 Comment
  UCR233015  Hemizonia George K. Helmkamp, E. A. Helmkamp 2011-5-12 17263 Sutter Sacramento Valley, Pleasant Grove, along Howsley Road opposite Pl. Gr. Elementary School, 1.0 mile west of Pleasant Grove Road and just west of the Post Office 15 Comment
  UCR233016  Lythrum hyssopifolia George K. Helmkamp, E. A. Helmkamp 2011-5-12 17264 Sutter Sacramento Valley, Pleasant Grove, along Howsley Road opposite Pl. Gr. Elementary School, 1.0 mile west of Pleasant Grove Road and just west of the Post Office 15 Comment
  UCR233017  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-5-12 17265 Sutter Sacramento Valley, Pleasant Grove, along Howsley Road opposite Pl. Gr. Elementary School, 1.0 mile west of Pleasant Grove Road and just west of the Post Office 15 Comment
  UCR233018  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2011-5-12 17275 Sutter Sacramento Valley, Garden Highway at the junction with Garwood Road, c. 1 mi. SW of Nicolaus 11 Comment
  UCR233019  Sinapis arvensis George K. Helmkamp, E. A. Helmkamp 2011-5-12 17269 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR233035  Malva parviflora George K. Helmkamp, E. A. Helmkamp 2011-5-12 17259 Sutter Southern Sacramento Valley, along Catlett Road immediately west of the Placer County line, 1.65 mi. NE (20 deg. ) of Pleasant Grove 15 Comment
  UCR233036  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2011-5-12 17260 Sutter Southern Sacramento Valley, along Catlett Road immediately west of the Placer County line, 1.65 mi. NE (20 deg. ) of Pleasant Grove 15 Comment
  UCR233037  Prunus dulcis George K. Helmkamp, E. A. Helmkamp 2011-5-12 17262 Sutter Sacramento Valley, Pleasant Grove, along Howsley Road opposite Pl. Gr. Elementary School, 1.0 mile west of Pleasant Grove Road and just west of the Post Office 15 Comment
  UCR233038  Silybum marianum George K. Helmkamp, E. A. Helmkamp 2011-5-12 17261 Sutter Southern Sacramento Valley, along Catlett Road immediately west of the Placer County line, 1.65 mi. NE (20 deg. ) of Pleasant Grove 15 Comment
  UCR233040  Picris echioides George K. Helmkamp, E. A. Helmkamp 2011-5-12 17268 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR233045  Bromus catharticus George K. Helmkamp, E. A. Helmkamp 2011-5-12 17276 Sutter Sacramento Valley, Garden Highway at the junction with Garwood Road, c. 1 mi. SW of Nicolaus 11 Comment
  UCR233046  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2011-5-12 17271 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR233047  Malva nicaeensis George K. Helmkamp, E. A. Helmkamp 2011-5-12 17270 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR233050  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2011-5-12 17283 Sutter Sacramento Valley, 0.1 mile southwest of village of Nicolaus on 1st Street, beside the Feather River 9 Comment
  UCR233051  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2011-5-12 17282 Sutter Sacramento Valley, 0.1 mile southwest of village of Nicolaus on 1st Street, beside the Feather River 9 Comment
  UCR233054  Phalaris paradoxa George K. Helmkamp, E. A. Helmkamp 2011-5-12 17266 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR233055  Vicia benghalensis George K. Helmkamp, E. A. Helmkamp 2011-5-12 17267 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR233056  Melilotus indicus George K. Helmkamp, E. A. Helmkamp 2011-5-12 17273 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR233057  Malva parviflora George K. Helmkamp, E. A. Helmkamp 2011-5-12 17272 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR233058  Equisetum laevigatum George K. Helmkamp, E. A. Helmkamp 2011-5-12 17281 Sutter Sacramento Valley, 0.1 mile southwest of village of Nicolaus on 1st Street, beside the Feather River 9 Comment
  UCR233061  Lythrum hyssopifolia George K. Helmkamp, E. A. Helmkamp 2011-5-12 17277 Sutter Sacramento Valley, Garden Highway at the junction with Garwood Road, c. 1 mi. SW of Nicolaus 11 Comment
  UCR233063  Acroptilon repens George K. Helmkamp, E. A. Helmkamp 2011-5-12 17278 Sutter Sacramento Valley, 0.1 mile southwest of village of Nicolaus on 1st Street, beside the Feather River 9 Comment
  UCR233064  Galium aparine George K. Helmkamp, E. A. Helmkamp 2011-5-12 17279 Sutter Sacramento Valley, 0.1 mile southwest of village of Nicolaus on 1st Street, beside the Feather River 9 Comment
  UCR233065  Coronopus didymus George K. Helmkamp, E. A. Helmkamp 2011-5-12 17280 Sutter Sacramento Valley, 0.1 mile southwest of village of Nicolaus on 1st Street, beside the Feather River 9 Comment
  UCR233110A  Daucus carota George K. Helmkamp, E. A. Helmkamp 2011-5-12 17287 Sutter Sacramento Valley, junction of Nicolaus Road and Pleasant Grove Road, 2 miles ESE (97 deg. ) of Trowbridge 16 Comment
  UCR233111A  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2011-5-12 17286 Sutter Sacramento Valley, junction of Nicolaus Road and Pleasant Grove Road, 2 miles ESE (97 deg. ) of Trowbridge 16 Comment
  UCR233119A  Rumex pulcher George K. Helmkamp, E. A. Helmkamp 2011-5-12 17285 Sutter Sacramento Valley, junction of Nicolaus Road and Pleasant Grove Road, 2 miles ESE (97 deg. ) of Trowbridge 16 Comment
  UCR233120A  Verbena litoralis George K. Helmkamp, E. A. Helmkamp 2011-5-12 17284 Sutter Sacramento Valley, junction of Nicolaus Road and Pleasant Grove Road, 2 miles ESE (97 deg. ) of Trowbridge 16 Comment
  UCR235277  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2011-11-28 18495 Sutter Sacramento Valley, Sacramento Ave., 0.2 miles from its junction with CA-99, 0.75 mi. NW of Nicolaus, beside the levee of the Feather River 20 Comment
  UCR235280  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2011-11-28 18490 Sutter Sacramento Valley, Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles southwest of Nicolaus 14 Comment
  UCR235281  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2011-11-28 18491 Sutter Sacramento Valley, Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles southwest of Nicolaus 14 Comment
  UCR235282  Conyza bonariensis George K. Helmkamp, E. A. Helmkamp 2011-11-28 18492 Sutter Sacramento Valley, Sacramento Ave., 0.3 mile east of its junctiion with CA-99, 1.45 mi. airline NW of Nicolaus 20 Comment
  UCR235288  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2011-11-28 18494 Sutter Sacramento Valley, Sacramento Ave., 0.2 miles from its junction with CA-99, 0.75 mi. NW of Nicolaus, beside the levee of the Feather River 20 Comment
  UCR235289  Oenothera biennis George K. Helmkamp, E. A. Helmkamp 2011-11-28 18493 Sutter Sacramento Valley, Sacramento Ave., 0.2 miles from its junction with CA-99, 0.75 mi. NW of Nicolaus, beside the levee of the Feather River 20 Comment
  UCR235290  Oenothera elata subsp. hirsutissima George K. Helmkamp, E. A. Helmkamp 2011-11-28 18492 A Sutter Sacramento Valley, Sacramento Ave., 0.2 miles from its junction with CA-99, 0.75 mi. NW of Nicolaus, beside the levee of the Feather River 20 Comment
  UCR235402  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2011-11-28 18485 Sutter Sacramento Valley, Garden Hwy at the southwest end of the village of Nicolaus 18 Comment
  UCR235403  Heterotheca grandiflora George K. Helmkamp, E. A. Helmkamp 2011-11-28 18486 Sutter Sacramento Valley, Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles southwest of Nicolaus 14 Comment
  UCR235404  Abutilon theophrasti George K. Helmkamp, E. A. Helmkamp 2011-11-28 18487 Sutter Sacramento Valley, Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles southwest of Nicolaus 14 Comment
  UCR235405  Conyza bonariensis George K. Helmkamp, E. A. Helmkamp 2011-11-28 18488 Sutter Sacramento Valley, Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles southwest of Nicolaus 14 Comment
  UCR235406  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2011-11-28 18489 Sutter Sacramento Valley, Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles southwest of Nicolaus 14 Comment
  UCR235437  Daucus carota George K. Helmkamp, E. A. Helmkamp 2011-11-28 18497 Sutter Sacramento Valley, Marcum Road/Nicolaus Ave., 0.1 mile west of the Placer County line, c. 9.5 mi. west of Lincoln 18 Comment
  UCR235438  Xanthium spinosum George K. Helmkamp, E. A. Helmkamp 2011-11-28 18496 Sutter Sacramento Valley, Sacramento Ave., 0.2 miles from its junction with CA-99, 0.75 mi. NW of Nicolaus, beside the levee of the Feather River 20 Comment
  UCR237450  Phoradendron macrophyllum George K. Helmkamp, E. A. Helmkamp 2012-2-23 18571 Sutter Sacramento Valley, Kirkville Rd., west end of Sacramento Ave. at the east end of the Sutter Bypass Causeway, NW of Nicolaus 16 Comment
  UCR237451  Sonchus oleraceus George K. Helmkamp, E. A. Helmkamp 2012-2-23 18567 Sutter Sacramento Valley, east end of Kirkville Road at the west edge of Sutter Bypass Causeway 15 Comment
  UCR237452  Grindelia hirsutula var. davyi George K. Helmkamp, E. A. Helmkamp 2012-2-23 18566 Sutter Sacramento Valley, east end of Kirkville Road at the west edge of Sutter Bypass Causeway 15 Comment
  UCR237463  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2012-2-23 18569 Sutter Sacramento Valley, east end of Kirkville Road at the west edge of Sutter Bypass Causeway 15 Comment
  UCR237464  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2012-2-23 18568 Sutter Sacramento Valley, east end of Kirkville Road at the west edge of Sutter Bypass Causeway 15 Comment
  UCR237465  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2012-2-23 18565 Sutter Sacramento Valley, east end of Kirkville Road at the west edge of Sutter Bypass Causeway 15 Comment
  UCR237466  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2012-2-23 18570 Sutter Sacramento Valley, Kirkville Rd., west end of Sacramento Ave. at the east end of the Sutter Bypass Causeway, NW of Nicolaus 16 Comment
  UCR237467  Oxalis pes-caprae George K. Helmkamp, E. A. Helmkamp 2012-2-23 18563 Sutter Sacramento Valley, Nicolaus Ave. (Garden Hwy) at the west end of the village of Nicolaus, just southeast of the Feather River levee 17 Comment
  UCR237468  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2012-2-23 18562 Sutter Sacramento Valley, Nicolaus Ave. at the east entrance to CA-70, west end of Trobridge 30 Comment
  UCR237469  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2012-2-23 18561 Sutter Sacramento Valley, Nicolaus Ave. at the east entrance to CA-70, west end of Trobridge 30 Comment
  UCR237596  Avena fatua George K. Helmkamp, E. A. Helmkamp 2012-2-23 18564 Sutter Sacramento Valley, east end of Kirkville Road at the west edge of Sutter Bypass Causeway 15 Comment
  UCR237597  Dimorphotheca sinuata George K. Helmkamp, E. A. Helmkamp 2012-2-23 18560 Sutter Sacramento Valley, Nicolaus Ave. at the east entrance to CA-70, west end of Trobridge 30 Comment
  UCR249541  Poa annua George K. Helmkamp 2013-3-1 20148 Sutter Sacramento Valley, Sacramento River levee along Cranmore Road, 0.7 mile south of Seymour Road via an unnamed road, 2 miles due west of Robbins 7 Comment
  UCR249542  Conium maculatum George K. Helmkamp 2013-3-1 20147 Sutter Sacramento Valley, Sacramento River levee along Cranmore Road, 0.7 mile south of Seymour Road via an unnamed road, 2 miles due west of Robbins 7 Comment
  UCR249543  Capsella bursa-pastoris George K. Helmkamp 2013-3-1 20146 Sutter Sacramento Valley, Sacramento River levee along Cranmore Road, 0.7 mile south of Seymour Road via an unnamed road, 2 miles due west of Robbins 7 Comment
  UCR249546  Brassica rapa George K. Helmkamp 2013-3-1 20145 Sutter Sacramento Valley, Sacramento River levee along Cranmore Road, 0.7 mile south of Seymour Road via an unnamed road, 2 miles due west of Robbins 7 Comment
  UCR249547  Raphanus sativus George K. Helmkamp 2013-3-1 20144 Sutter Sacramento Valley, Sacramento River levee along Cranmore Road, 0.7 mile south of Seymour Road via an unnamed road, 2 miles due west of Robbins 7 Comment
  UCR249548  Senecio vulgaris George K. Helmkamp 2013-3-1 20143 Sutter Sacramento Valley, east side of the Sacramento River levee along Cranmore Road, 2.4 miles north of Knights Landing 21 Comment
  UCR249575  Triticum aestivum George K. Helmkamp, Amy Barnes 2013-3-28 20268 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249576  Gnaphalium luteoalbum George K. Helmkamp, Amy Barnes 2013-3-28 20265 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249578  Sibara virginica George K. Helmkamp, Amy Barnes 2013-3-28 20278 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249579  Rubus ursinus George K. Helmkamp, Amy Barnes 2013-3-28 20277 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249580  Senecio vulgaris George K. Helmkamp, Amy Barnes 2013-3-28 20276 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249581  Stellaria media George K. Helmkamp, Amy Barnes 2013-3-28 20275 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249582  Calandrinia ciliata George K. Helmkamp, Amy Barnes 2013-3-28 20274 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249583  Rorippa palustris George K. Helmkamp, Amy Barnes 2013-3-28 20273 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249584  Sinapis alba George K. Helmkamp, Amy Barnes 2013-3-28 20270 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249585  Avena barbata George K. Helmkamp, Amy Barnes 2013-3-28 20269 Sutter Sacramento Valley, Hageman Road just south of its junction with CA-20, east of Meridian 17 Comment
  UCR249929  Festuca myuros George K. Helmkamp 2013-3-9 20163 Sutter Northern Sancramento Valley, North Butte Road, 0.2 mile east of its junction with West Butte Road, NW foot of Sutter Buttes 26 Comment
  UCR249930  Raphanus sativus George K. Helmkamp 2013-3-9 20162 Sutter Northern Sancramento Valley, North Butte Road, 0.2 mile east of its junction with West Butte Road, NW foot of Sutter Buttes 26 Comment
  UCR249931  Matricaria discoidea George K. Helmkamp 2013-3-9 20164 Sutter Northern Sancramento Valley, North Butte Road, 0.2 mile east of its junction with West Butte Road, NW foot of Sutter Buttes 26 Comment
  UCR250085  Salix lasiolepis George K. Helmkamp 2013-3-9 20160 Sutter Northern Sacramento Valley, North Butte Road, 0.4 mile west of its junction with West Butte Road, NW foot of Sutter Buttes 24 Comment
  UCR250180  Bromus diandrus George K. Helmkamp 2013-3-9 20159 Sutter Northern Sacramento Valley, North Butte Road, 0.4 mile west of its junction with West Butte Road, NW foot of Sutter Buttes 24 Comment
  UCR250181  Eschscholzia lobbii George K. Helmkamp 2013-3-9 20158 Sutter Northern Sacramento Valley, West Butte Road, 5.5 miles north of its junction with West Butte Pass Road, NW foot of Sutter Buttes 24 Comment
  UCR250182  Lepidium nitidum var. nitidum George K. Helmkamp 2013-3-9 20157 Sutter Northern Sacramento Valley, West Butte Road, 5.5 miles north of its junction with West Butte Pass Road, NW foot of Sutter Buttes 24 Comment
  UCR250183  Lupinus succulentus George K. Helmkamp 2013-3-9 20156 Sutter Northern Sacramento Valley, West Butte Road, 5.5 miles north of its junction with West Butte Pass Road, NW foot of Sutter Buttes 24 Comment
  UCR250184  Amsinckia lunaris George K. Helmkamp 2013-3-9 20155 Sutter Northern Sacramento Valley, West Butte Road, 5.5 miles north of its junction with West Butte Pass Road, NW foot of Sutter Buttes 24 Comment
  UCR253592  Cephalanthus occidentalis var. californicus George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20111 Sutter Sacramento Valley, Kirkville Rd., west of CA-99 on Sacramento Ave. to the east side of the Sutter Causeway 17 Comment
  UCR253593  Atriplex triangularis George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20110 Sutter Sacramento Valley, Kirkville Rd., west of CA-99 on Sacramento Ave. to the east side of the Sutter Causeway 17 Comment
  UCR253594  Lotus purshianus var. purshianus George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20109 Sutter Sacramento Valley, Kirkville Rd., west of CA-99 on Sacramento Ave. to the east side of the Sutter Causeway 17 Comment
  UCR253595  Melilotus albus George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20108 Sutter Sacramento Valley, Kirkville Rd., west of CA-99 on Sacramento Ave. to the east side of the Sutter Causeway 17 Comment
  UCR253601  Epilobium brachycarpum George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20113 Sutter Sacramento Valley, Kirkville Rd., west of CA-99 on Sacramento Ave. to the east side of the Sutter Causeway 17 Comment
  UCR253602  Helianthus annuus George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20112 Sutter Sacramento Valley, Kirkville Rd., west of CA-99 on Sacramento Ave. to the east side of the Sutter Causeway 17 Comment
  UCR256997  Lepidium nitidum var. nitidum George K. Helmkamp, Amy Barnes 2014-3-21 22600 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257000  Brassica kaber George K. Helmkamp, Amy Barnes 2014-3-21 22598 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257001  Hordeum murinum subsp. glaucum George K. Helmkamp, Amy Barnes 2014-3-21 22597 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257002  Matricaria discoidea George K. Helmkamp, Amy Barnes 2014-3-21 22596 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257003  Raphanus sativus George K. Helmkamp, Amy Barnes 2014-3-21 22612 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257004  Poa annua George K. Helmkamp, Amy Barnes 2014-3-21 22608 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257005  Avena fatua George K. Helmkamp, Amy Barnes 2014-3-21 22607 A Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257024  Avena barbata George K. Helmkamp, Amy Barnes 2014-3-21 22607 B Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257025  Gazania linearis George K. Helmkamp, Amy Barnes 2014-3-21 22606 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257027  Lepidium strictum George K. Helmkamp, Amy Barnes 2014-3-21 22601 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257028  Medicago polymorpha George K. Helmkamp, Amy Barnes 2014-3-21 22599 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257035  Lamium amplexicaule George K. Helmkamp, Amy Barnes 2014-3-21 22615 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257036  Festuca myuros var. hirsuta George K. Helmkamp, Amy Barnes 2014-3-21 22614 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257037  Geranium dissectum George K. Helmkamp, Amy Barnes 2014-3-21 22613 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257042  Salix lasiolepis George K. Helmkamp, Amy Barnes 2014-3-21 22609 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257130  Rorippa palustris subsp. palustris George K. Helmkamp, Amy Barnes 2014-3-21 22604 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257131  Brassica rapa George K. Helmkamp, Amy Barnes 2014-3-21 22602 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257136  Brassica kaber George K. Helmkamp, Amy Barnes 2014-3-21 22611 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257137  Silybum marianum George K. Helmkamp, Amy Barnes 2014-3-21 22610 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR257552  Poa annua George K. Helmkamp, Amy Barnes 2014-3-21 22594 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257553  Erodium cicutarium George K. Helmkamp, Amy Barnes 2014-3-21 22593 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257554  Geranium carolinianum George K. Helmkamp, Amy Barnes 2014-3-21 22592 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257555  Erodium moschatum George K. Helmkamp, Amy Barnes 2014-3-21 22591 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR257589  Plantago lanceolata George K. Helmkamp, Amy Barnes 2014-3-21 22616 Sutter Sacramento Valley, 2.8 miles WSW (257 deg. ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR258126  Festuca perennis George K. Helmkamp, Amy Barnes 2014-3-21 22622 Sutter Sacramento Valley, 2.8 miles WSW (257 deg. ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR258127  Amsinckia intermedia George K. Helmkamp, Amy Barnes 2014-3-21 22620 Sutter Sacramento Valley, 2.8 miles WSW (257 deg. ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR258538  Triticum aestivum George K. Helmkamp, Amy Barnes 2014-3-21 22624 Sutter Sacramento Valley, 2.8 miles WSW (257 deg. ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR258539  Avena barbata George K. Helmkamp, Amy Barnes 2014-3-21 22623 Sutter Sacramento Valley, 2.8 miles WSW (257 deg. ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR258794  Bromus diandrus George K. Helmkamp, Amy Barnes 2014-3-21 22618 Sutter Sacramento Valley, 2.8 miles WSW (257 deg. ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR258986  Lupinus bicolor George K. Helmkamp, Amy Barnes 2014-3-21 22617 Sutter Sacramento Valley, 2.8 miles WSW (257 deg. ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR262436  Picris echioides George K. Helmkamp, E. A. Helmkamp 2011-12-9 18506 Sutter Sacramento Valley, beside Cross Canal, just west of Hwy 99, 0.3 mile west of Howsley Road on an unnamed dirt road 17 Comment
  UCR262444  Polygonum lapathifolium George K. Helmkamp, E. A. Helmkamp 2011-12-9 18505 Sutter Sacramento Valley, beside Cross Canal, just west of Hwy 99, 0.3 mile west of Howsley Road on an unnamed dirt road 17 Comment
  UCR262446  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2011-12-9 18504 Sutter Sacramento Valley, beside Cross Canal, just west of Hwy 99, 0.3 mile west of Howsley Road on an unnamed dirt road 17 Comment
  SBBG128405  Achillea millefolium G. K. Helmkamp, E. A. Helmkamp 2012-2-23 18562 Sutter Nicolaus Ave at the E entrance to CA-70, W end of Trobridge 30 Comment
  SBBG128875  Dimorphotheca sinuata G. K. Helmkamp, E. A. Helmkamp 2012-2-23 18560 Sutter Nicolaus Ave at the E entrance to CA-70, W end of Trobridge 30 Comment
  SBBG129056  Salix lasiolepis G. K. Helmkamp 2013-3-9 20160 Sutter N Butte Rd, 0.4 mi W of its jct with W Butte Rd, NW foot of Sutter Buttes 24 Comment
  SBBG129057  Bromus diandrus G. K. Helmkamp 2013-3-9 20159 Sutter N Butte Rd, 0.4 mi W of its jct with W Butte Rd, NW foot of Sutter Buttes 24 Comment
  SBBG129233  Lepidium nitidum G. K. Helmkamp 2013-3-9 20157 Sutter W Butte Rd, 5.5 mi N of its jct with W Butte Pass Rd, NW foot of Sutter Buttes 24 Comment
  SEINET3246192  Cyperus odoratus G. K. Helmkamp, E. A. Helmkamp 2009-1 15552 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86) of Nicolaus 8 Comment
  SEINET7249199  Poa annua George K. Helmkamp 2013-1 Sutter Comment



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