Polk County

Showing 151–200 of 971.

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  Cardamine occidentalis (S. Watson ex B.L. Rob.) Howell Native CAOC

  big western bittercress · Brassicaceae
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  Cardamine oligosperma Nutt. Native CAOL

  little western bittercress · Brassicaceae
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  Cardamine penduliflora O.E. Schulz Native CAPE2

  Willamette Valley bittercress · Brassicaceae
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  Carex arcta Boott Native CAAR2

  northern cluster sedge · Cyperaceae
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  Carex californica L.H. Bailey Native CACA9

  California sedge · Cyperaceae
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  Carex densa (L.H. Bailey) L.H. Bailey Native CADE8

  dense sedge · Cyperaceae
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  Carex hendersonii L.H. Bailey Native CAHE7

  Henderson's sedge · Cyperaceae
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  Carex laeviculmis Meinsh. Native CALA13

  smoothstem sedge · Cyperaceae
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  Carex lenticularis Michx. Native CALE8

  lakeshore sedge · Cyperaceae
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  Carex luzulina Olney Native CALU7

  woodrush sedge · Cyperaceae
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  Carex mertensii Prescott ex Bong. Native CAME6

  Mertens' sedge · Cyperaceae
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  Carex nudata W. Boott Native CANU5

  naked sedge · Cyperaceae
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  Carex obnupta L.H. Bailey Native CAOB3

  slough sedge · Cyperaceae
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  Carex praticola Rydb. Native CAPR7

  meadow sedge · Cyperaceae
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  Carex rossii Boott Native CARO5

  Ross' sedge · Cyperaceae
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  Carex stipata Muhl. ex Willd. Native CAST5

  awlfruit sedge · Cyperaceae
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  Carex stipata Muhl. ex Willd. var. stipata Native CASTS3

  owlfruit sedge · Cyperaceae
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  Carex tumulicola Mack. Native CATU3

  splitawn sedge · Cyperaceae
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  Carex unilateralis Mack. Native CAUN3

  lateral sedge · Cyperaceae
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  Carex utriculata Boott Native CAUT

  Northwest Territory sedge · Cyperaceae
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  Castilleja attenuata (A. Gray) T.I. Chuang & Heckard Native CAAT25

  attenuate Indian paintbrush · Scrophulariaceae
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  Castilleja tenuis (A. Heller) T.I. Chuang & Heckard Native CATE26

  hairy Indian paintbrush · Scrophulariaceae
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  Ceanothus sanguineus Pursh Native CESA

  redstem ceanothus · Rhamnaceae
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  Ceanothus velutinus Douglas ex Hook. Native CEVE

  snowbrush ceanothus · Rhamnaceae
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  Ceanothus velutinus Douglas ex Hook. var. hookeri M.C. Johnst. Native CEVEH2

  Hooker's ceanothus · Rhamnaceae
• 
  Centaurea cyanus L. Introduced CECY2

  garden cornflower · Asteraceae
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  Centaurea nigrescens Willd. Introduced CENI3

  Tyrol knapweed · Asteraceae
• 
  Centaurea stoebe L. Introduced CEST8

  spotted knapweed · Asteraceae
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  Centaurea stoebe L. ssp. micranthos (Gugler) Hayek Introduced CESTM

  spotted knapweed · Asteraceae
• 
  Centaurium erythraea Rafn Introduced CEER5

  European centaury · Gentianaceae
• 
  Cerastium arvense L. Both CEAR4

  field chickweed · Caryophyllaceae
• 
  Cerastium fontanum Baumg. Introduced CEFO2

  common mouse-ear chickweed · Caryophyllaceae
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  Cerastium fontanum Baumg. ssp. vulgare (Hartm.) Greuter & Burdet Introduced CEFOV2

  big chickweed · Caryophyllaceae
• 
  Cerastium glomeratum Thuill. Introduced CEGL2

  sticky chickweed · Caryophyllaceae
• 
  Chamerion angustifolium (L.) Holub Native CHAN9

  fireweed · Onagraceae
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  Chamerion angustifolium (L.) Holub ssp. circumvagum (Mosquin) Hoch Native CHANC

  fireweed · Onagraceae
• 
  Chenopodium album L. Both CHAL7

  lambsquarters · Chenopodiaceae
• 
  Chenopodium album L. var. album Introduced CHALA

  lambsquarters · Chenopodiaceae
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  Chrysolepis chrysophylla (Douglas ex Hook.) Hjelmqvist Native CHCH7

  giant chinquapin · Fagaceae
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  Chrysolepis chrysophylla (Douglas ex Hook.) Hjelmqvist var. chrysophylla Native CHCHC4

  giant chinquapin · Fagaceae
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  Chrysosplenium glechomifolium Nutt. Native CHGL5

  Pacific golden saxifrage · Saxifragaceae
• 
  Cichorium intybus L. Introduced CIIN

  chicory · Asteraceae
• 
  Cinna latifolia (Trevis. ex Goepp.) Griseb. Native CILA2

  drooping woodreed · Poaceae
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  Circaea alpina L. Native CIAL

  small enchanter's nightshade · Onagraceae
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  Circaea alpina L. ssp. pacifica (Asch. & Magnus) P.H. Raven Native CIALP2

  small enchanter's nightshade · Onagraceae
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  Cirsium arvense (L.) Scop. Introduced CIAR4

  Canada thistle · Asteraceae
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  Cirsium brevistylum Cronquist Native CIBR2

  clustered thistle · Asteraceae
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  Cirsium edule Nutt. Native CIED

  edible thistle · Asteraceae
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  Cirsium remotifolium (Hook.) DC. Native CIRE

  fewleaf thistle · Asteraceae
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  Cirsium vulgare (Savi) Ten. Introduced CIVU

  bull thistle · Asteraceae