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 3,451–3,500 of 4,111.

• 
  Salix lutea Nutt. Native SALU2

  yellow willow · Salicaceae 4 counties
• 
  Salix matsudana Koidzumi Introduced SAMA13

  corkscrew willow · Salicaceae 1 county
• 
  Salix melanopsis Nutt. Native SAME2

  dusky willow · Salicaceae 3 counties
• 
  Salix monticola Bebb Native SAMO2

  park willow · Salicaceae 31 counties
• 
  Salix myrtillifolia Andersson Native SAMY

  blueberry willow · Salicaceae 1 county
• 
  Salix nigra Marshall Native SANI

  black willow · Salicaceae 1 county
• 
  Salix nivalis Hook. Native SANI8

  snow willow · Salicaceae 21 counties
• 
  Salix orestera C.K. Schneid. Native SAOR

  Sierra willow · Salicaceae 13 counties
• 
  Salix petiolaris Sm. Native SAPE5

  meadow willow · Salicaceae 2 counties
• 
  Salix petrophila Rydb. Native SAPE18

  alpine willow · Salicaceae 23 counties
• 
  Salix planifolia Pursh Native SAPL2

  diamondleaf willow · Salicaceae 23 counties
• 
  Salix planifolia Pursh ssp. planifolia Native SAPLP4

  diamondleaf willow · Salicaceae 23 counties
• 
  Salix purpurea L. Introduced SAPU2

  purpleosier willow · Salicaceae 3 counties
• 
  Salix scouleriana Barratt ex Hook. Native SASC

  Scouler's willow · Salicaceae 20 counties
• 
  Salix serissima (L.H. Bailey) Fernald Native SASE2

  autumn willow · Salicaceae 6 counties
• 
  Salix taxifolia Kunth Native SATA

  yewleaf willow · Salicaceae 1 county
• 
  Salix wolfii Bebb Native SAWO

  Wolf's willow · Salicaceae 17 counties
• ⚘
  Salix ×glatfelteri C.K. Schneid. [amygdaloides × nigra] Native SAGL3

  hybrid willow · Salicaceae 1 county
• ⚘
  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 azurea Michx. ex Lam. Native SAAZ

  azure blue sage · Lamiaceae 4 counties
• 
  Salvia azurea Michx. ex Lam. var. grandiflora Benth. Native SAAZG

  pitcher sage · Lamiaceae 4 counties
• 
  Salvia pratensis L. Introduced SAPR2

  introduced sage · Lamiaceae 1 county
• 
  Salvia reflexa Hornem. Native SARE3

  lanceleaf sage · Lamiaceae 28 counties
• 
  Salvia sclarea L. Introduced SASC2

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

  woodland sage · Lamiaceae 4 counties
• 
  Sambucus nigra L. Both SANI4

  black elderberry · Caprifoliaceae 9 counties
• 
  Sambucus nigra L. ssp. canadensis (L.) R. Bolli Native SANIC4

  American black elderberry · Caprifoliaceae 4 counties
• 
  Sambucus nigra L. ssp. cerulea (Raf.) R. Bolli Native SANIC5

  blue elderberry · Caprifoliaceae 5 counties
• 
  Sambucus racemosa L. Native SARA2

  red elderberry · Caprifoliaceae 31 counties
• 
  Sambucus racemosa L. var. racemosa Native SARAR3

  red elderberry · Caprifoliaceae 31 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
• 
  Sanicula marilandica L. Native SAMA2

  Maryland sanicle · Apiaceae 8 counties
• 
  Sapindus saponaria L. Native SASA4

  wingleaf soapberry · Sapindaceae 3 counties
• 
  Sapindus saponaria L. var. drummondii (Hook. & Arn.) L.D. Benson Native SASAD

  western soapberry · Sapindaceae 3 counties
• 
  Saponaria officinalis L. Introduced SAOF4

  bouncingbet · Caryophyllaceae 10 counties
• 
  Sarcobatus vermiculatus (Hook.) Torr. Native SAVE4

  greasewood · Chenopodiaceae 18 counties
• 
  Saussurea weberi Hultén Native SAWE

  Weber's saw-wort · Asteraceae 2 counties
• 
  Saxifraga adscendens L. Native SAAD

  wedgeleaf saxifrage · Saxifragaceae 10 counties
• 
  Saxifraga adscendens L. ssp. oregonensis (Raf.) Bacig. Native SAADO2

  small saxifrage · Saxifragaceae 10 counties
• 
  Saxifraga bronchialis L. Native SABR6

  yellowdot saxifrage · Saxifragaceae 29 counties
• 
  Saxifraga bronchialis L. ssp. austromontana (Wiegand) Piper Native SABRA2

  matted saxifrage · Saxifragaceae 29 counties
• 
  Saxifraga caespitosa L. Native SACA50

  tufted alpine saxifrage · Saxifragaceae 15 counties
• 
  Saxifraga caespitosa L. ssp. delicatula (Small) A.E. Porsild Native SACAD2

  tufted alpine saxifrage · Saxifragaceae 14 counties
• 
  Saxifraga caespitosa L. ssp. monticola (Small) A.E. Porsild Native SACAM2

  tufted alpine saxifrage · Saxifragaceae 5 counties
• 
  Saxifraga cernua L. Native SACE2

  nodding saxifrage · Saxifragaceae 13 counties