Colorado

• Adams 08001
  205 taxa Open ↗
• Alamosa 08003
  652 taxa Open ↗
• Arapahoe 08005
  254 taxa Open ↗
• Archuleta 08007
  651 taxa Open ↗
• Baca 08009
  785 taxa Open ↗
• Bent 08011
  267 taxa Open ↗
• Boulder 08013
  1,961 taxa Open ↗
• Broomfield 08014
  0 taxa Open ↗
• Chaffee 08015
  607 taxa Open ↗
• Cheyenne 08017
  694 taxa Open ↗

Showing 351–400 of 434 (introduced).

• 
  Secale cereale L. Introduced SECE

  cereal rye · Poaceae 6 counties
• 
  Securigera varia (L.) Lassen Introduced SEVA4

  crownvetch · Fabaceae 5 counties
• 
  Sedum acre L. Introduced SEAC

  goldmoss stonecrop · Crassulaceae 1 county
• 
  Senecio vulgaris L. Introduced SEVU

  old-man-in-the-Spring · Asteraceae 6 counties
• 
  Setaria italica (L.) P. Beauv. Introduced SEIT

  foxtail millet · Poaceae 8 counties
• 
  Setaria pumila (Poir.) Roem. & Schult. Introduced SEPU8

  yellow foxtail · Poaceae 4 counties
• 
  Setaria verticillata (L.) P. Beauv. Introduced SEVE3

  hooked bristlegrass · Poaceae 3 counties
• 
  Setaria viridis (L.) P. Beauv. Introduced SEVI4

  green bristlegrass · Poaceae 26 counties
• 
  Setaria viridis (L.) P. Beauv. var. viridis Introduced SEVIV

  green bristlegrass · Poaceae 26 counties
• 
  Silene csereii Baumg. Introduced SICS

  Balkan catchfly · Caryophyllaceae 1 county
• 
  Silene dichotoma Ehrh. Introduced SIDI2

  forked catchfly · Caryophyllaceae 2 counties
• 
  Silene gallica L. Introduced SIGA

  common catchfly · Caryophyllaceae 1 county
• 
  Silene latifolia Poir. Introduced SILA21

  bladder campion · Caryophyllaceae 10 counties
• 
  Silene latifolia Poir. ssp. alba (Mill.) Greuter & Burdet Introduced SILAA3

  bladder campion · Caryophyllaceae 10 counties
• 
  Silene noctiflora L. Introduced SINO

  nightflowering silene · Caryophyllaceae 2 counties
• 
  Silene vulgaris (Moench) Garcke Introduced SIVU

  maidenstears · Caryophyllaceae 2 counties
• 
  Sinapis alba L. Introduced SIAL5

  white mustard · Brassicaceae 1 county
• 
  Sinapis arvensis L. Introduced SIAR4

  charlock mustard · Brassicaceae 13 counties
• 
  Sinapis arvensis L. ssp. arvensis Introduced SIARA

  wild mustard · Brassicaceae 13 counties
• 
  Sisymbrium altissimum L. Introduced SIAL2

  tall tumblemustard · Brassicaceae 36 counties
• 
  Sisymbrium austriacum Jacq. Introduced SIAU6

  jeweled rocket · Brassicaceae 1 county
• 
  Sisymbrium irio L. Introduced SIIR

  London rocket · Brassicaceae 2 counties
• 
  Sisymbrium loeselii L. Introduced SILO3

  small tumbleweed mustard · Brassicaceae 9 counties
• 
  Sisymbrium officinale (L.) Scop. Introduced SIOF

  hedgemustard · Brassicaceae 2 counties
• 
  Solanum dulcamara L. Introduced SODU

  climbing nightshade · Solanaceae 6 counties
• 
  Solanum dulcamara L. var. dulcamara Introduced SODUD

  climbing nightshade · Solanaceae 6 counties
• 
  Solanum physalifolium Rusby Introduced SOPH

  hoe nightshade · Solanaceae 11 counties
• 
  Sonchus arvensis L. Introduced SOAR2

  field sowthistle · Asteraceae 16 counties
• 
  Sonchus arvensis L. ssp. arvensis Introduced SOARA2

  field sowthistle · Asteraceae 1 county
• 
  Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman Introduced SOARU

  moist sowthistle · Asteraceae 8 counties
• 
  Sonchus asper (L.) Hill Introduced SOAS

  spiny sowthistle · Asteraceae 14 counties
• 
  Sonchus oleraceus L. Introduced SOOL

  common sowthistle · Asteraceae 7 counties
• 
  Sorbus aucuparia L. Introduced SOAU

  European mountain ash · Rosaceae 1 county
• 
  Sorghum bicolor (L.) Moench Introduced SOBI2

  sorghum · Poaceae 2 counties
• 
  Sorghum halepense (L.) Pers. Introduced SOHA

  Johnsongrass · Poaceae 6 counties
• 
  Spergula arvensis L. Introduced SPAR

  corn spurry · Caryophyllaceae 1 county
• 
  Spergularia maritima (All.) Chiov. Introduced SPMA10

  media sandspurry · Caryophyllaceae 3 counties
• 
  Spergularia rubra (L.) J. Presl & C. Presl Introduced SPRU

  red sandspurry · Caryophyllaceae 11 counties
• 
  Sphaerophysa salsula (Pall.) DC. Introduced SPSA3

  alkali swainsonpea · Fabaceae 6 counties
• 
  Spiraea trilobata L. Introduced SPTR2

  Asian meadowsweet · Rosaceae 1 county
• 
  Stellaria graminea L. Introduced STGR

  grass-like starwort · Caryophyllaceae 1 county
• 
  Stellaria media (L.) Vill. Introduced STME2

  common chickweed · Caryophyllaceae 5 counties
• 
  Stellaria media (L.) Vill. ssp. media Introduced STMEM

  common chickweed · Caryophyllaceae 5 counties
• 
  Symphytum officinale L. Introduced SYOF

  common comfrey · Boraginaceae 2 counties
• 
  Syringa vulgaris L. Introduced SYVU

  common lilac · Oleaceae 1 county
• 
  Tamarix chinensis Lour. Introduced TACH2

  five-stamen tamarisk · Tamaricaceae 1 county
• 
  Tamarix parviflora DC. Introduced TAPA4

  smallflower tamarisk · Tamaricaceae 2 counties
• 
  Tamarix ramosissima Ledeb. Introduced TARA

  saltcedar · Tamaricaceae 23 counties
• 
  Tanacetum balsamita L. Introduced TABA

  costmary · Asteraceae 1 county
• 
  Tanacetum coccineum (Willd.) Grierson Introduced TACO6

  pyrethum daisy · Asteraceae 1 county