Arkansas

• Arkansas 05001
  816 taxa Open ↗
• Ashley 05003
  1,236 taxa Open ↗
• Baxter 05005
  1,025 taxa Open ↗
• Benton 05007
  1,372 taxa Open ↗
• Boone 05009
  697 taxa Open ↗
• Bradley 05011
  1,145 taxa Open ↗
• Calhoun 05013
  573 taxa Open ↗
• Carroll 05015
  1,039 taxa Open ↗
• Chicot 05017
  440 taxa Open ↗
• Clark 05019
  896 taxa Open ↗

Showing 101–150 of 562 (introduced).

• 
  Capsella bursa-pastoris (L.) Medik. Introduced CABU2

  shepherd's purse · Brassicaceae 56 counties
• 
  Cardamine flexuosa With. Introduced CAFL14

  woodland bittercress · Brassicaceae 1 county
• 
  Cardamine hirsuta L. Introduced CAHI3

  hairy bittercress · Brassicaceae 54 counties
• 
  Cardiospermum halicacabum L. Introduced CAHA13

  balloon vine · Sapindaceae 21 counties
• 
  Carduus crispus L. Introduced CACR2

  curly plumeless thistle · Asteraceae 1 county
• 
  Carduus nutans L. Introduced CANU4

  nodding plumeless thistle · Asteraceae 11 counties
• 
  Castanea mollissima Blume Introduced CAMO83

  Chinese chestnut · Fagaceae 1 county
• 
  Celastrus orbiculatus Thunb. Introduced CEOR7

  Oriental bittersweet · Celastraceae 1 county
• 
  Centaurea cyanus L. Introduced CECY2

  garden cornflower · Asteraceae 26 counties
• 
  Centaurea stoebe L. Introduced CEST8

  spotted knapweed · Asteraceae 13 counties
• 
  Centaurea stoebe L. ssp. micranthos (Gugler) Hayek Introduced CESTM

  spotted knapweed · Asteraceae 13 counties
• 
  Cerastium brachypetalum Pers. Introduced CEBR2

  gray chickweed · Caryophyllaceae 6 counties
• 
  Cerastium diffusum Pers. Introduced CEDI7

  fourstamen chickweed · Caryophyllaceae 1 county
• 
  Cerastium dubium (Bast.) Guépin Introduced CEDU2

  doubtful chickweed · Caryophyllaceae 1 county
• 
  Cerastium fontanum Baumg. Introduced CEFO2

  common mouse-ear chickweed · Caryophyllaceae 17 counties
• 
  Cerastium fontanum Baumg. ssp. vulgare (Hartm.) Greuter & Burdet Introduced CEFOV2

  big chickweed · Caryophyllaceae 17 counties
• 
  Cerastium glomeratum Thuill. Introduced CEGL2

  sticky chickweed · Caryophyllaceae 58 counties
• 
  Cerastium semidecandrum L. Introduced CESE4

  fivestamen chickweed · Caryophyllaceae 4 counties
• 
  Chaenomeles speciosa (Sweet) Nakai Introduced CHSP12

  flowering quince · Rosaceae 1 county
• 
  Chaenorhinum minus (L.) Lange Introduced CHMI

  dwarf snapdragon · Scrophulariaceae 8 counties
• 
  Chenopodium album L. var. album Introduced CHALA

  lambsquarters · Chenopodiaceae 41 counties
• 
  Chenopodium murale L. Introduced CHMU2

  nettleleaf goosefoot · Chenopodiaceae 4 counties
• 
  Chorispora tenella (Pall.) DC. Introduced CHTE2

  crossflower · Brassicaceae 3 counties
• 
  Cichorium intybus L. Introduced CIIN

  chicory · Asteraceae 18 counties
• 
  Cirsium arvense (L.) Scop. Introduced CIAR4

  Canada thistle · Asteraceae 1 county
• 
  Cirsium vulgare (Savi) Ten. Introduced CIVU

  bull thistle · Asteraceae 25 counties
• 
  Citrullus lanatus (Thunb.) Matsum. & Nakai Introduced CILA3

  watermelon · Cucurbitaceae 2 counties
• 
  Citrullus lanatus (Thunb.) Matsum. & Nakai var. citroides (L.H. Bailey) Mansf. Introduced CILAC

  watermelon · Cucurbitaceae 1 county
• 
  Citrullus lanatus (Thunb.) Matsum. & Nakai var. lanatus Introduced CILAL

  watermelon · Cucurbitaceae 2 counties
• 
  Clematis terniflora DC. Introduced CLTE4

  sweet autumn virginsbower · Ranunculaceae 19 counties
• 
  Clematis terniflora DC. var. terniflora Introduced CLTET2

  sweet autumn virginsbower · Ranunculaceae 1 county
• ⚘
  Clematis ×jackmanii T. Moore [lanuginosa × viticella] Introduced CLJA2

  leather flower · Ranunculaceae 1 county
• 
  Cleome hassleriana Chod. Introduced CLHA

  pink queen · Capparaceae 21 counties
• 
  Cnicus benedictus L. Introduced CNBE

  blessed thistle · Asteraceae 1 county
• 
  Colocasia esculenta (L.) Schott Introduced COES

  coco yam · Araceae 1 county
• 
  Commelina caroliniana Walter Introduced COCA17

  Carolina dayflower · Commelinaceae 1 county
• 
  Commelina communis L. Introduced COCO3

  Asiatic dayflower · Commelinaceae 46 counties
• 
  Conium maculatum L. Introduced COMA2

  poison hemlock · Apiaceae 7 counties
• 
  Conringia orientalis (L.) Dumort. Introduced COOR

  hare's ear mustard · Brassicaceae 2 counties
• 
  Consolida ajacis (L.) Schur Introduced COAJ

  doubtful knight's-spur · Ranunculaceae 17 counties
• 
  Convallaria majalis L. Introduced COMA7

  European lily of the valley · Liliaceae 3 counties
• 
  Convolvulus arvensis L. Introduced COAR4

  field bindweed · Convolvulaceae 20 counties
• 
  Conyza bonariensis (L.) Cronquist Introduced COBO

  asthmaweed · Asteraceae 2 counties
• 
  Conyza floribunda Kunth Introduced COFL

  asthmaweed · Asteraceae 1 county
• 
  Coronopus didymus (L.) Sm. Introduced CODI6

  lesser swinecress · Brassicaceae 17 counties
• 
  Cosmos bipinnatus Cav. Introduced COBI2

  garden cosmos · Asteraceae 1 county
• 
  Cosmos sulphureus Cav. Introduced COSU5

  sulphur cosmos · Asteraceae 2 counties
• 
  Crepis pulchra L. Introduced CRPU3

  smallflower hawksbeard · Asteraceae 9 counties
• 
  Crotalaria spectabilis Roth Introduced CRSP2

  showy rattlebox · Fabaceae 3 counties
• 
  Cruciata pedemontana (Bellardi) Ehrend. Introduced CRPE10

  piedmont bedstraw · Rubiaceae 20 counties