Pennsylvania

• Adams 42001
  1,101 taxa Open ↗
• Allegheny 42003
  1,943 taxa Open ↗
• Armstrong 42005
  1,126 taxa Open ↗
• Beaver 42007
  1,402 taxa Open ↗
• Bedford 42009
  1,989 taxa Open ↗
• Berks 42011
  2,115 taxa Open ↗
• Blair 42013
  1,613 taxa Open ↗
• Bradford 42015
  1,111 taxa Open ↗
• Bucks 42017
  2,298 taxa Open ↗
• Butler 42019
  1,422 taxa Open ↗

Showing 1,001–1,050 of 3,901.

• 
  Cosmos sulphureus Cav. Introduced COSU5

  sulphur cosmos · Asteraceae 6 counties
• 
  Cotinus coggygria Scop. Introduced COCO10

  European smoketree · Anacardiaceae 10 counties
• 
  Cotoneaster apiculatus Rehder & E.H. Wilson Introduced COAP3

  cranberry cotoneaster · Rosaceae 3 counties
• 
  Crassula aquatica (L.) Schoenl. Native CRAQ

  water pygmyweed · Crassulaceae 1 county
• 
  Crataegus brainerdii Sarg. Native CRBR3

  Brainerd's hawthorn · Rosaceae 4 counties
• 
  Crataegus calpodendron (Ehrh.) Medik. Native CRCA

  pear hawthorn · Rosaceae 17 counties
• 
  Crataegus chrysocarpa Ashe Native CRCH

  fireberry hawthorn · Rosaceae 26 counties
• 
  Crataegus chrysocarpa Ashe var. chrysocarpa Native CRCHC2

  red haw · Rosaceae 26 counties
• 
  Crataegus crus-galli L. Native CRCR2

  cockspur hawthorn · Rosaceae 33 counties
• 
  Crataegus dilatata Sarg. Native CRDI

  broadleaf hawthorn · Rosaceae 3 counties
• 
  Crataegus dodgei Ashe Native CRDO3

  Dodge's hawthorn · Rosaceae 1 county
• 
  Crataegus flabellata (Bosc ex Spach) K. Koch Native CRFL

  fanleaf hawthorn · Rosaceae 47 counties
• 
  Crataegus intricata Lange Native CRIN3

  Copenhagen hawthorn · Rosaceae 21 counties
• 
  Crataegus macrosperma Ashe Native CRMA3

  bigfruit hawthorn · Rosaceae 2 counties
• 
  Crataegus mollis Scheele Native CRMO2

  downy hawthorn · Rosaceae 2 counties
• 
  Crataegus monogyna Jacq. Introduced CRMO3

  oneseed hawthorn · Rosaceae 12 counties
• ⚘
  Crataegus pedicellata Sarg. Native CRPE

  scarlet hawthorn · Rosaceae 38 counties
• 
  Crataegus phaenopyrum (L. f.) Medik. Native CRPH

  Washington hawthorn · Rosaceae 11 counties
• 
  Crataegus pruinosa (Wendl. f.) K. Koch Native CRPR2

  waxyfruit hawthorn · Rosaceae 36 counties
• 
  Crataegus punctata Jacq. Native CRPU

  dotted hawthorn · Rosaceae 37 counties
• 
  Crataegus succulenta Schrad. ex Link Native CRSU5

  fleshy hawthorn · Rosaceae 16 counties
• 
  Crataegus uniflora Münchh. Native CRUN

  dwarf hawthorn · Rosaceae 14 counties
• 
  Crepis biennis L. Introduced CRBI3

  rough hawksbeard · Asteraceae 2 counties
• 
  Crepis capillaris (L.) Wallr. Introduced CRCA3

  smooth hawksbeard · Asteraceae 24 counties
• 
  Crepis setosa Haller f. Introduced CRSE2

  bristly hawksbeard · Asteraceae 3 counties
• 
  Crepis tectorum L. Introduced CRTE3

  narrowleaf hawksbeard · Asteraceae 4 counties
• 
  Crepis vesicaria L. Introduced CRVE3

  beaked hawksbeard · Asteraceae 2 counties
• 
  Crepis vesicaria L. ssp. taraxacifolia (Thuill.) Thell. Introduced CRVET

  beaked hawksbeard · Asteraceae 2 counties
• 
  Crotalaria sagittalis L. Native CRSA4

  arrowhead rattlebox · Fabaceae 18 counties
• 
  Croton capitatus Michx. Native CRCA6

  hogwort · Euphorbiaceae 4 counties
• 
  Croton capitatus Michx. var. capitatus Native CRCAC2

  hogwort · Euphorbiaceae 4 counties
• 
  Croton glandulosus L. Both CRGL2

  vente conmigo · Euphorbiaceae 6 counties
• 
  Croton glandulosus L. var. scordioides (Lam.) Müll. Arg. Introduced CRGLS4

  Brazilian croton · Euphorbiaceae 1 county
• 
  Croton glandulosus L. var. septentrionalis Müll. Arg. Native CRGLS

  vente conmigo · Euphorbiaceae 6 counties
• 
  Croton lindheimerianus Scheele Native CRLI2

  threeseed croton · Euphorbiaceae 2 counties
• 
  Croton lindheimerianus Scheele var. lindheimerianus Native CRLIL

  threeseed croton · Euphorbiaceae 2 counties
• 
  Croton michauxii G.L. Webster Native CRMI8

  Michaux's croton · Euphorbiaceae 2 counties
• 
  Croton michauxii G.L. Webster var. ellipticus (Willd.) B.W. van Ee & P.E. Berry Native CRMIE

  Michaux's croton · Euphorbiaceae 2 counties
• 
  Croton punctatus Jacq. Native CRPU6

  gulf croton · Euphorbiaceae 2 counties
• 
  Cruciata pedemontana (Bellardi) Ehrend. Introduced CRPE10

  piedmont bedstraw · Rubiaceae 1 county
• 
  Crypsis alopecuroides (Piller & Mitterp.) Schrad. Introduced CRAL2

  foxtail pricklegrass · Poaceae 1 county
• 
  Crypsis schoenoides (L.) Lam. Introduced CRSC

  swamp pricklegrass · Poaceae 6 counties
• 
  Cryptogramma stelleri (S.G. Gmel.) Prantl Native CRST2

  fragile rockbrake · Pteridaceae 4 counties
• 
  Cryptotaenia canadensis (L.) DC. Native CRCA9

  Canadian honewort · Apiaceae 66 counties
• 
  Cucumis melo L. Introduced CUME

  cantaloupe · Cucurbitaceae 8 counties
• 
  Cucumis sativus L. Introduced CUSA4

  garden cucumber · Cucurbitaceae 4 counties
• 
  Cucurbita maxima Duchesne Introduced CUMA3

  winter squash · Cucurbitaceae 1 county
• 
  Cucurbita moschata Duchesne Introduced CUMO

  crookneck squash · Cucurbitaceae 4 counties
• 
  Cucurbita pepo L. Both CUPE

  field pumpkin · Cucurbitaceae 13 counties
• 
  Cucurbita pepo L. var. pepo Introduced CUPEP

  field pumpkin · Cucurbitaceae 13 counties