Washington

• Adams 53001
  571 taxa Open ↗
• Asotin 53003
  959 taxa Open ↗
• Benton 53005
  796 taxa Open ↗
• Chelan 53007
  1,875 taxa Open ↗
• Clallam 53009
  1,390 taxa Open ↗
• Clark 53011
  658 taxa Open ↗
• Columbia 53013
  1,183 taxa Open ↗
• Cowlitz 53015
  798 taxa Open ↗
• Douglas 53017
  679 taxa Open ↗
• Ferry 53019
  994 taxa Open ↗

Showing 951–1,000 of 4,423.

• 
  Celtis laevigata Willd. Native CELA

  sugarberry · Ulmaceae 10 counties
• 
  Celtis laevigata Willd. var. reticulata (Torr.) L.D. Benson Native CELAR

  netleaf hackberry · Ulmaceae 10 counties
• 
  Cenchrus longispinus (Hack.) Fernald Native CELO3

  mat sandbur · Poaceae 15 counties
• 
  Centaurea calcitrapa L. Introduced CECA2

  red star-thistle · Asteraceae 5 counties
• 
  Centaurea cyanus L. Introduced CECY2

  garden cornflower · Asteraceae 24 counties
• 
  Centaurea diffusa Lam. Introduced CEDI3

  diffuse knapweed · Asteraceae 34 counties
• 
  Centaurea iberica Trevir. ex Spreng. Introduced CEIB

  Iberian knapweed · Asteraceae 1 county
• 
  Centaurea jacea L. Introduced CEJA

  brownray knapweed · Asteraceae 17 counties
• 
  Centaurea macrocephala Puschk. ex Willd. Introduced CEMA9

  bighead knapweed · Asteraceae 13 counties
• 
  Centaurea melitensis L. Introduced CEME2

  Maltese star-thistle · Asteraceae 5 counties
• 
  Centaurea montana L. Introduced CEMO

  perennial cornflower · Asteraceae 5 counties
• 
  Centaurea nigra L. Introduced CENI2

  lesser knapweed · Asteraceae 9 counties
• 
  Centaurea nigrescens Willd. Introduced CENI3

  Tyrol knapweed · Asteraceae 22 counties
• 
  Centaurea solstitialis L. Introduced CESO3

  yellow star-thistle · Asteraceae 23 counties
• 
  Centaurea stoebe L. Introduced CEST8

  spotted knapweed · Asteraceae 37 counties
• 
  Centaurea stoebe L. ssp. micranthos (Gugler) Hayek Introduced CESTM

  spotted knapweed · Asteraceae 37 counties
• 
  Centaurea trichocephala M. Bieb. ex Willd. Introduced CETR12

  feather-head knapweed · Asteraceae 1 county
• 
  Centaurium erythraea Rafn Introduced CEER5

  European centaury · Gentianaceae 13 counties
• 
  Centaurium exaltatum (Griseb.) W. Wight ex Piper Native CEEX

  desert centaury · Gentianaceae 10 counties
• 
  Centaurium muehlenbergii (Griseb.) W. Wight ex Piper Native CEMU2

  Muhlenberg's centaury · Gentianaceae 4 counties
• 
  Centranthus ruber (L.) DC. Introduced CERU2

  red valerian · Valerianaceae 5 counties
• 
  Centromadia pungens (Hook. & Arn.) Greene Native CEPU14

  common tarweed · Asteraceae 8 counties
• 
  Centromadia pungens (Hook. & Arn.) Greene ssp. pungens Native CEPUP6

  common tarweed · Asteraceae 8 counties
• 
  Centromadia pungens (Hook. & Arn.) Greene ssp. septentrionalis (D.D. Keck) B.G. Baldw. Native CEPUS2

  common tarweed · Asteraceae 1 county
• 
  Cephalanthera austiniae (A. Gray) A. Heller Native CEAU

  phantom orchid · Orchidaceae 9 counties
• 
  Cerastium arvense L. Both CEAR4

  field chickweed · Caryophyllaceae 25 counties
• 
  Cerastium arvense L. ssp. strictum (L.) Ugborogho Native CEARS2

  field chickweed · Caryophyllaceae 25 counties
• 
  Cerastium beeringianum Cham. & Schltdl. Native CEBE2

  Bering chickweed · Caryophyllaceae 4 counties
• 
  Cerastium beeringianum Cham. & Schltdl. ssp. earlei (Rydb.) Hultén Native CEBEE

  Bering chickweed · Caryophyllaceae 4 counties
• 
  Cerastium dichotomum L. Introduced CEDI5

  forked chickweed · Caryophyllaceae 4 counties
• 
  Cerastium dubium (Bast.) Guépin Introduced CEDU2

  doubtful chickweed · Caryophyllaceae 3 counties
• 
  Cerastium fontanum Baumg. Introduced CEFO2

  common mouse-ear chickweed · Caryophyllaceae 28 counties
• 
  Cerastium fontanum Baumg. ssp. vulgare (Hartm.) Greuter & Burdet Introduced CEFOV2

  big chickweed · Caryophyllaceae 28 counties
• 
  Cerastium glomeratum Thuill. Introduced CEGL2

  sticky chickweed · Caryophyllaceae 23 counties
• 
  Cerastium nutans Raf. Native CENU2

  nodding chickweed · Caryophyllaceae 15 counties
• 
  Cerastium nutans Raf. var. nutans Native CENUN

  nodding chickweed · Caryophyllaceae 15 counties
• 
  Cerastium semidecandrum L. Introduced CESE4

  fivestamen chickweed · Caryophyllaceae 6 counties
• 
  Cerastium tomentosum L. Introduced CETO2

  snow in summer · Caryophyllaceae 6 counties
• 
  Ceratocephala testiculata (Crantz) Roth Introduced CETE5

  curveseed butterwort · Ranunculaceae 14 counties
• 
  Ceratophyllum demersum L. Native CEDE4

  coon's tail · Ceratophyllaceae 17 counties
• 
  Ceratophyllum echinatum A. Gray Native CEEC2

  spineless hornwort · Ceratophyllaceae 4 counties
• 
  Cercocarpus ledifolius Nutt. Native CELE3

  curl-leaf mountain mahogany · Rosaceae 4 counties
• 
  Cercocarpus ledifolius Nutt. var. intercedens C.K. Schneid. Native CELEI

  curl-leaf mountain mahogany · Rosaceae 4 counties
• 
  Chaenactis douglasii (Hook.) Hook. & Arn. Native CHDO

  Douglas' dustymaiden · Asteraceae 20 counties
• 
  Chaenactis douglasii (Hook.) Hook. & Arn. var. douglasii Native CHDOD

  Douglas' dustymaiden · Asteraceae 20 counties
• 
  Chaenactis thompsonii Cronquist Native CHTH

  Thompson's pincushion · Asteraceae 5 counties
• 
  Chaenorhinum minus (L.) Lange Introduced CHMI

  dwarf snapdragon · Scrophulariaceae 2 counties
• 
  Chamaesyce glyptosperma (Engelm.) Small Native CHGL13

  ribseed sandmat · Euphorbiaceae 16 counties
• 
  Chamaesyce maculata (L.) Small Native CHMA15

  spotted sandmat · Euphorbiaceae 10 counties
• 
  Chamaesyce serpyllifolia (Pers.) Small Native CHSE6

  thymeleaf sandmat · Euphorbiaceae 14 counties