Illinois

• Adams 17001
  1,183 taxa Open ↗
• Alexander 17003
  1,220 taxa Open ↗
• Bond 17005
  682 taxa Open ↗
• Boone 17007
  1,163 taxa Open ↗
• Brown 17009
  836 taxa Open ↗
• Bureau 17011
  652 taxa Open ↗
• Calhoun 17013
  1,017 taxa Open ↗
• Carroll 17015
  931 taxa Open ↗
• Cass 17017
  1,389 taxa Open ↗
• Champaign 17019
  1,420 taxa Open ↗

Showing 2,401–2,450 of 2,969 (native).

• 
  Sagittaria graminea Michx. Native SAGR

  grassy arrowhead · Alismataceae 28 counties
• 
  Sagittaria graminea Michx. var. graminea Native SAGRG

  grassy arrowhead · Alismataceae 28 counties
• 
  Sagittaria latifolia Willd. Native SALA2

  broadleaf arrowhead · Alismataceae 73 counties
• 
  Sagittaria rigida Pursh Native SARI

  sessilefruit arrowhead · Alismataceae 20 counties
• 
  Salicornia depressa Standl. Native SADE10

  Virginia glasswort · Chenopodiaceae 1 county
• 
  Salix amygdaloides Andersson Native SAAM2

  peachleaf willow · Salicaceae 58 counties
• 
  Salix bebbiana Sarg. Native SABE2

  Bebb willow · Salicaceae 11 counties
• 
  Salix candida Flueggé ex Willd. Native SACA4

  sageleaf willow · Salicaceae 13 counties
• 
  Salix caroliniana Michx. Native SACA5

  coastal plain willow · Salicaceae 14 counties
• 
  Salix cordata Michx. Native SACO3

  heartleaf willow · Salicaceae 3 counties
• 
  Salix discolor Muhl. Native SADI

  pussy willow · Salicaceae 45 counties
• 
  Salix eriocephala Michx. Native SAER

  Missouri River willow · Salicaceae 54 counties
• 
  Salix humilis Marshall Native SAHU2

  prairie willow · Salicaceae 83 counties
• 
  Salix humilis Marshall var. humilis Native SAHUH

  prairie willow · Salicaceae 80 counties
• 
  Salix humilis Marshall var. tristis (Aiton) Griggs Native SAHUT

  prairie willow · Salicaceae 7 counties
• 
  Salix interior Rowlee Native SAIN3

  sandbar willow · Salicaceae 98 counties
• 
  Salix lucida Muhl. Native SALU

  shining willow · Salicaceae 8 counties
• 
  Salix lucida Muhl. ssp. lucida Native SALUL2

  shining willow · Salicaceae 8 counties
• 
  Salix myricoides Muhl. Native SAMY2

  bayberry willow · Salicaceae 17 counties
• 
  Salix myricoides Muhl. var. myricoides Native SAMYM

  bayberry willow · Salicaceae 17 counties
• 
  Salix nigra Marshall Native SANI

  black willow · Salicaceae 102 counties
• 
  Salix pedicellaris Pursh Native SAPE2

  bog willow · Salicaceae 8 counties
• 
  Salix petiolaris Sm. Native SAPE5

  meadow willow · Salicaceae 12 counties
• 
  Salix sericea Marshall Native SASE

  silky willow · Salicaceae 26 counties
• 
  Salix serissima (L.H. Bailey) Fernald Native SASE2

  autumn willow · Salicaceae 2 counties
• 
  Salvia azurea Michx. ex Lam. Native SAAZ

  azure blue sage · Lamiaceae 13 counties
• 
  Salvia azurea Michx. ex Lam. var. grandiflora Benth. Native SAAZG

  pitcher sage · Lamiaceae 13 counties
• 
  Salvia lyrata L. Native SALY2

  lyreleaf sage · Lamiaceae 13 counties
• 
  Salvia reflexa Hornem. Native SARE3

  lanceleaf sage · Lamiaceae 21 counties
• 
  Sambucus nigra L. ssp. canadensis (L.) R. Bolli Native SANIC4

  American black elderberry · Caprifoliaceae 102 counties
• 
  Sambucus racemosa L. Native SARA2

  red elderberry · Caprifoliaceae 7 counties
• 
  Sambucus racemosa L. var. racemosa Native SARAR3

  red elderberry · Caprifoliaceae 7 counties
• 
  Samolus valerandi L. ssp. parviflorus (Raf.) Hultén Native SAVAP

  seaside brookweed · Primulaceae 55 counties
• 
  Sanguinaria canadensis L. Native SACA13

  bloodroot · Papaveraceae 95 counties
• 
  Sanguisorba canadensis L. Native SACA14

  Canadian burnet · Rosaceae 3 counties
• 
  Sanicula canadensis L. Native SACA15

  Canadian blacksnakeroot · Apiaceae 98 counties
• 
  Sanicula canadensis L. var. canadensis Native SACAC2

  Canadian blacksnakeroot · Apiaceae 2 counties
• 
  Sanicula marilandica L. Native SAMA2

  Maryland sanicle · Apiaceae 30 counties
• 
  Sanicula odorata (Raf.) K.M. Pryer & L.R. Phillippe Native SAOD

  clustered blacksnakeroot · Apiaceae 88 counties
• 
  Sanicula trifoliata E.P. Bicknell Native SATR4

  largefruit blacksnakeroot · Apiaceae 9 counties
• 
  Sarracenia purpurea L. Native SAPU4

  purple pitcherplant · Sarraceniaceae 3 counties
• 
  Sarracenia purpurea L. ssp. purpurea var. purpurea Native SAPUP6

  northern purple pitcherplant · Sarraceniaceae 3 counties
• 
  Sassafras albidum (Nutt.) Nees Native SAAL5

  sassafras · Lauraceae 81 counties
• 
  Saururus cernuus L. Native SACE

  lizard's tail · Saururaceae 58 counties
• 
  Saxifraga pensylvanica L. Native SAPE8

  eastern swamp saxifrage · Saxifragaceae 36 counties
• 
  Saxifraga virginiensis Michx. Native SAVI5

  early saxifrage · Saxifragaceae 2 counties
• 
  Saxifraga virginiensis Michx. var. virginiensis Native SAVIV

  early saxifrage · Saxifragaceae 2 counties
• 
  Schedonnardus paniculatus (Nutt.) Trel. Native SCPA

  tumblegrass · Poaceae 1 county
• 
  Scheuchzeria palustris L. Native SCPA2

  rannoch-rush · Scheuchzeriaceae 4 counties
• 
  Scheuchzeria palustris L. ssp. americana (Fernald) Hultén Native SCPAA3

  rannoch-rush · Scheuchzeriaceae 4 counties