Cook County

Showing 1–50 of 359.

• 
  Acalypha gracilens A. Gray Native ACGR2

  slender threeseed mercury · Euphorbiaceae
• 
  Acanthospermum hispidum DC. Introduced ACHI

  hispid starbur · Asteraceae
• 
  Acer rubrum L. Native ACRU

  red maple · Aceraceae
• 
  Agalinis fasciculata (Elliott) Raf. Native AGFA2

  beach false foxglove · Scrophulariaceae
• 
  Ageratina aromatica (L.) Spach Native AGAR4

  lesser snakeroot · Asteraceae
• 
  Ageratina aromatica (L.) Spach var. aromatica Native AGARA

  lesser snakeroot · Asteraceae
• 
  Agrimonia microcarpa Wallr. Native AGMI2

  smallfruit agrimony · Rosaceae
• 
  Agrostis perennans (Walter) Tuck. Native AGPE

  upland bentgrass · Poaceae
• 
  Aletris aurea Walter Native ALAU

  golden colicroot · Liliaceae
• 
  Aletris obovata Nash Native ALOB3

  southern colicroot · Liliaceae
• 
  Alnus serrulata (Aiton) Willd. Native ALSE2

  hazel alder · Betulaceae
• 
  Amaranthus palmeri S. Watson Native AMPA

  carelessweed · Amaranthaceae
• 
  Ambrosia artemisiifolia L. Both AMAR2

  annual ragweed · Asteraceae
• 
  Ambrosia artemisiifolia L. var. paniculata (Michx.) Blank. Native AMARP

  annual ragweed · Asteraceae
• 
  Amphicarpum muehlenbergianum (Schult.) Hitchc. Native AMMU2

  Muhlenberg maidencane · Poaceae
• 
  Amsonia ciliata Walter Native AMCI

  fringed bluestar · Apocynaceae
• 
  Andropogon ternarius Michx. Native ANTE2

  splitbeard bluestem · Poaceae
• 
  Andropogon ternarius Michx. var. ternarius Native ANTET

  splitbeard bluestem · Poaceae
• 
  Angelica dentata (Chapm.) J.M. Coult. & Rose Native ANDE4

  coastal plain angelica · Apiaceae
• 
  Anthaenantia rufa (Nutt.) Schult. Native ANRU

  purple silkyscale · Poaceae
• 
  Aristida beyrichiana Trin. & Rupr. Native ARBE7

  Beyrich threeawn · Poaceae
• 
  Aristida longespica Poir. Native ARLO16

  slimspike threeawn · Poaceae
• 
  Arnoglossum ovatum (Walter) H. Rob. Native AROV

  ovateleaf cacalia · Asteraceae
• 
  Aronia arbutifolia (L.) Pers. Native ARAR7

  red chokeberry · Rosaceae
• 
  Arundinaria gigantea (Walter) Muhl. Native ARGI

  giant cane · Poaceae
• 
  Asclepias cinerea Walter Native ASCI5

  Carolina milkweed · Asclepiadaceae
• 
  Asplenium platyneuron (L.) Britton, Sterns & Poggenb. Native ASPL

  ebony spleenwort · Aspleniaceae
• 
  Athyrium filix-femina (L.) Roth Native ATFI

  common ladyfern · Dryopteridaceae
• 
  Athyrium filix-femina (L.) Roth ssp. asplenioides (Michx.) Hultén Native ATFIA2

  asplenium ladyfern · Dryopteridaceae
• 
  Axonopus furcatus (Flueggé) Hitchc. Native AXFU

  big carpetgrass · Poaceae
• 
  Azolla caroliniana Willd. Native AZCA

  Carolina mosquitofern · Azollaceae
• 
  Balduina atropurpurea Harper Native BAAT

  purpledisk honeycombhead · Asteraceae
• 
  Betula nigra L. Native BENI

  river birch · Betulaceae
• 
  Bigelowia nudata (Michx.) DC. Native BINU

  pineland rayless goldenrod · Asteraceae
• 
  Bigelowia nudata (Michx.) DC. ssp. nudata Native BINUN

  pineland rayless goldenrod · Asteraceae
• 
  Boehmeria cylindrica (L.) Sw. Native BOCY

  smallspike false nettle · Urticaceae
• 
  Botrychium lunarioides (Michx.) Sw. Native BOLU2

  winter grapefern · Ophioglossaceae
• 
  Brasenia schreberi J.F. Gmel. Native BRSC

  watershield · Cabombaceae
• 
  Bromus catharticus Vahl Introduced BRCA6

  rescuegrass · Poaceae
• 
  Brunnichia ovata (Walter) Shinners Native BROV4

  American buckwheat vine · Polygonaceae
• 
  Bulbostylis capillaris (L.) Kunth ex C.B. Clarke Native BUCA2

  densetuft hairsedge · Cyperaceae
• 
  Bulbostylis capillaris (L.) Kunth ex C.B. Clarke ssp. capillaris Native BUCAC

  densetuft hairsedge · Cyperaceae
• 
  Burmannia capitata (J.F. Gmel.) Mart. Native BUCA3

  southern bluethread · Burmanniaceae
• 
  Callicarpa americana L. Native CAAM2

  American beautyberry · Verbenaceae
• 
  Carex frankii Kunth Native CAFR3

  Frank's sedge · Cyperaceae
• 
  Carex glaucescens Elliott Native CAGL5

  southern waxy sedge · Cyperaceae
• 
  Carphephorus odoratissimus (J.F. Gmel.) Herb. Native CAOD3

  vanillaleaf · Asteraceae
• 
  Carphephorus paniculatus (J.F. Gmel.) Herb. Native CAPA53

  hairy chaffhead · Asteraceae
• 
  Cenchrus echinatus L. Native CEEC

  southern sandbur · Poaceae
• 
  Centella erecta (L. f.) Fernald Native CEER2

  erect centella · Apiaceae