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 301–350 of 434 (introduced).

• 
  Polygonum cuspidatum Siebold & Zucc. Introduced POCU6

  Japanese knotweed · Polygonaceae 1 county
• 
  Polygonum hydropiper L. Introduced POHY

  marshpepper knotweed · Polygonaceae 3 counties
• 
  Polygonum persicaria L. Introduced POPE3

  spotted ladysthumb · Polygonaceae 20 counties
• 
  Polypogon monspeliensis (L.) Desf. Introduced POMO5

  annual rabbitsfoot grass · Poaceae 22 counties
• 
  Polypogon viridis (Gouan) Breistr. Introduced POVI9

  beardless rabbitsfoot grass · Poaceae 2 counties
• 
  Populus alba L. Introduced POAL7

  white poplar · Salicaceae 2 counties
• 
  Potamogeton crispus L. Introduced POCR3

  curly pondweed · Potamogetonaceae 2 counties
• 
  Potentilla anglica Laicharding Introduced POAN7

  English cinquefoil · Rosaceae 1 county
• 
  Potentilla argentea L. Introduced POAR8

  silver cinquefoil · Rosaceae 3 counties
• 
  Potentilla argentea L. var. argentea Introduced POARA3

  silver cinquefoil · Rosaceae 3 counties
• 
  Potentilla recta L. Introduced PORE5

  sulphur cinquefoil · Rosaceae 4 counties
• 
  Prunus armeniaca L. Introduced PRAR3

  apricot · Rosaceae 3 counties
• 
  Prunus cerasus L. Introduced PRCE

  sour cherry · Rosaceae 1 county
• 
  Psathyrostachys juncea (Fisch.) Nevski Introduced PSJU3

  Russian wildrye · Poaceae 12 counties
• 
  Puccinellia distans (Jacq.) Parl. ssp. distans Introduced PUDID

  weeping alkaligrass · Poaceae 5 counties
• 
  Ranunculus repens L. Introduced RARE3

  creeping buttercup · Ranunculaceae 4 counties
• 
  Raphanus raphanistrum L. Introduced RARA2

  wild radish · Brassicaceae 2 counties
• 
  Reseda lutea L. Introduced RELU

  yellow mignonette · Resedaceae 4 counties
• 
  Rhamnus cathartica L. Introduced RHCA3

  common buckthorn · Rhamnaceae 2 counties
• 
  Rheum rhabarbarum L. Introduced RHRH2

  garden rhubarb · Polygonaceae 2 counties
• 
  Rorippa sylvestris (L.) Besser Introduced ROSY

  creeping yellowcress · Brassicaceae 1 county
• 
  Rosa multiflora Thunb. Introduced ROMU

  multiflora rose · Rosaceae 1 county
• 
  Rosa rubiginosa L. Introduced RORU82

  sweetbriar rose · Rosaceae 1 county
• 
  Rubus laciniatus Willd. Introduced RULA

  cutleaf blackberry · Rosaceae 1 county
• 
  Rumex acetosella L. Introduced RUAC3

  common sheep sorrel · Polygonaceae 20 counties
• 
  Rumex crispus L. Introduced RUCR

  curly dock · Polygonaceae 28 counties
• 
  Rumex crispus L. ssp. crispus Introduced RUCRC

  curly dock · Polygonaceae 28 counties
• 
  Rumex obtusifolius L. Introduced RUOB

  bitter dock · Polygonaceae 4 counties
• 
  Rumex patientia L. Introduced RUPA5

  patience dock · Polygonaceae 2 counties
• 
  Rumex stenophyllus Ledeb. Introduced RUST4

  narrowleaf dock · Polygonaceae 6 counties
• 
  Saccharum ravennae (L.) L. Introduced SARA3

  ravennagrass · Poaceae 1 county
• 
  Salix alba L. Introduced SAAL2

  white willow · Salicaceae 5 counties
• ⚘
  Salix fragilis L. Introduced SAFR

  crack willow · Salicaceae 5 counties
• 
  Salix matsudana Koidzumi Introduced SAMA13

  corkscrew willow · Salicaceae 1 county
• 
  Salix purpurea L. Introduced SAPU2

  purpleosier willow · Salicaceae 3 counties
• ⚘
  Salix ×sepulcralis Simonkai [alba × babylonica] Introduced SASE10

  weeping willow · Salicaceae 1 county
• 
  Salsola collina Pall. Introduced SACO8

  slender Russian thistle · Chenopodiaceae 13 counties
• 
  Salsola paulsenii Litv. Introduced SAPA8

  barbwire Russian thistle · Chenopodiaceae 1 county
• 
  Salsola tragus L. Introduced SATR12

  prickly Russian thistle · Chenopodiaceae 32 counties
• 
  Salvia aethiopis L. Introduced SAAE

  Mediterranean sage · Lamiaceae 1 county
• 
  Salvia pratensis L. Introduced SAPR2

  introduced sage · Lamiaceae 1 county
• 
  Salvia sclarea L. Introduced SASC2

  Europe sage · Lamiaceae 1 county
• ⚘
  Salvia ×sylvestris L. (pro sp.) [nemorosa × pratensis] Introduced SASY

  woodland sage · Lamiaceae 4 counties
• 
  Sanguisorba minor Scop. Introduced SAMI3

  small burnet · Rosaceae 7 counties
• 
  Sanguisorba minor Scop. ssp. balearica (Bourg. ex Nyman) M. Garm. & C. Navarro Introduced SAMIB2

  small burnet · Rosaceae 7 counties
• 
  Saponaria officinalis L. Introduced SAOF4

  bouncingbet · Caryophyllaceae 10 counties
• 
  Schedonorus arundinaceus (Schreb.) Dumort., nom. cons. Introduced SCAR7

  tall fescue · Poaceae 9 counties
• 
  Schedonorus pratensis (Huds.) P. Beauv. Introduced SCPR4

  meadow fescue · Poaceae 15 counties
• 
  Sclerochloa dura (L.) P. Beauv. Introduced SCDU2

  common hardgrass · Poaceae 1 county
• 
  Scorzonera laciniata L. Introduced SCLA6

  cutleaf vipergrass · Asteraceae 11 counties