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 151–200 of 1,109 (introduced).

• 
  Calamagrostis epigeios (L.) Roth Introduced CAEP

  chee reedgrass · Poaceae 6 counties
• 
  Calamintha nepeta (L.) Savi Introduced CANE17

  lesser calamint · Lamiaceae 2 counties
• 
  Calamintha nepeta (L.) Savi ssp. glandulosa (Riquien) P.W. Ball Introduced CANEG

  lesser calamint · Lamiaceae 2 counties
• 
  Calendula officinalis L. Introduced CAOF

  pot marigold · Asteraceae 6 counties
• 
  Callistephus chinensis (L.) Nees Introduced CACH25

  China aster · Asteraceae 1 county
• 
  Callitriche stagnalis Scop. Introduced CAST

  pond water-starwort · Callitrichaceae 13 counties
• 
  Calystegia hederacea Wall. Introduced CAHE21

  Japanese false bindweed · Convolvulaceae 22 counties
• 
  Calystegia sepium (L.) R. Br. ssp. sepium Introduced CASES

  hedge false bindweed · Convolvulaceae 1 county
• 
  Camelina microcarpa Andrz. ex DC. Introduced CAMI2

  littlepod false flax · Brassicaceae 32 counties
• 
  Camelina sativa (L.) Crantz Introduced CASA2

  false flax · Brassicaceae 9 counties
• 
  Camelina sativa (L.) Crantz ssp. sativa Introduced CASAS2

  gold-of-pleasure · Brassicaceae 9 counties
• 
  Campanula glomerata L. Introduced CAGL2

  Dane's blood · Campanulaceae 2 counties
• 
  Campanula latifolia L. Introduced CALA40

  giant bellflower · Campanulaceae 2 counties
• 
  Campanula persicifolia L. Introduced CAPE20

  peachleaf bellflower · Campanulaceae 1 county
• 
  Campanula rapunculoides L. Introduced CARA

  rampion bellflower · Campanulaceae 37 counties
• 
  Campanula trachelium L. Introduced CATR4

  bats in the belfry · Campanulaceae 1 county
• ⚘
  Canna ×generalis L.H. Bailey (pro sp.) [glauca × indica] Introduced CAGE3

  canna lily · Cannaceae 5 counties
• 
  Cannabis sativa L. Introduced CASA3

  marijuana · Cannabaceae 17 counties
• 
  Cannabis sativa L. ssp. sativa Introduced CASAS3

  marijuana · Cannabaceae 17 counties
• 
  Cannabis sativa L. ssp. sativa var. sativa Introduced CASAS9

  marijuana · Cannabaceae 17 counties
• 
  Capsella bursa-pastoris (L.) Medik. Introduced CABU2

  shepherd's purse · Brassicaceae 60 counties
• 
  Cardamine flexuosa With. Introduced CAFL14

  woodland bittercress · Brassicaceae 4 counties
• 
  Cardamine hirsuta L. Introduced CAHI3

  hairy bittercress · Brassicaceae 26 counties
• 
  Cardamine impatiens L. Introduced CAIM

  narrowleaf bittercress · Brassicaceae 11 counties
• 
  Cardaria draba (L.) Desv. Introduced CADR

  whitetop · Brassicaceae 10 counties
• 
  Cardaria pubescens (C.A. Mey.) Jarmolenko Introduced CAPU6

  hairy whitetop · Brassicaceae 1 county
• 
  Cardiospermum halicacabum L. Introduced CAHA13

  balloon vine · Sapindaceae 4 counties
• 
  Carduus acanthoides L. Introduced CAAC

  spiny plumeless thistle · Asteraceae 17 counties
• 
  Carduus crispus L. Introduced CACR2

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

  nodding plumeless thistle · Asteraceae 19 counties
• 
  Carduus tenuiflorus W. Curtis Introduced CATE2

  winged plumeless thistle · Asteraceae 1 county
• 
  Carex distans L. Introduced CADI27

  distant sedge · Cyperaceae 1 county
• 
  Carex distenta Kunze Introduced CADI17

  widow's sedge · Cyperaceae 1 county
• 
  Carex divulsa Stokes Introduced CADI19

  grassland sedge · Cyperaceae 2 counties
• 
  Carex divulsa Stokes ssp. divulsa Introduced CADID3

  grassland sedge · Cyperaceae 2 counties
• 
  Carex hirta L. Introduced CAHI10

  hammer sedge · Cyperaceae 3 counties
• 
  Carex muricata L. Introduced CAMU7

  rough sedge · Cyperaceae 1 county
• 
  Carex spicata Huds. Introduced CASP10

  prickly sedge · Cyperaceae 16 counties
• 
  Carlina vulgaris L. Introduced CAVU3

  carline thistle · Asteraceae 1 county
• 
  Carum carvi L. Introduced CACA19

  caraway · Apiaceae 23 counties
• 
  Castanea crenata Siebold & Zucc. Introduced CACR27

  Japanese chestnut · Fagaceae 1 county
• 
  Catalpa ovata G. Don Introduced CAOV5

  Chinese catalpa · Bignoniaceae 3 counties
• 
  Caucalis platycarpos L. Introduced CAPL11

  carrot bur parsley · Apiaceae 3 counties
• 
  Celastrus orbiculatus Thunb. Introduced CEOR7

  Oriental bittersweet · Celastraceae 23 counties
• 
  Celosia argentea L. Introduced CEAR3

  silver cock's comb · Amaranthaceae 7 counties
• 
  Centaurea calcitrapa L. Introduced CECA2

  red star-thistle · Asteraceae 3 counties
• 
  Centaurea cyanus L. Introduced CECY2

  garden cornflower · Asteraceae 15 counties
• 
  Centaurea jacea L. Introduced CEJA

  brownray knapweed · Asteraceae 27 counties
• 
  Centaurea melitensis L. Introduced CEME2

  Maltese star-thistle · Asteraceae 1 county
• 
  Centaurea montana L. Introduced CEMO

  perennial cornflower · Asteraceae 2 counties