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 851–900 of 3,901.

• 
  Chenopodium album L. var. missouriense (Aellen) I.J. Bassett & C.W. Crompton Native CHALM2

  Missouri lambsquarters · Chenopodiaceae 49 counties
• 
  Chenopodium album L. var. striatum Krašan Native CHALS2

  lateflowering goosefoot · Chenopodiaceae 6 counties
• 
  Chenopodium berlandieri Moq. Native CHBE4

  pitseed goosefoot · Chenopodiaceae 55 counties
• 
  Chenopodium berlandieri Moq. var. bushianum (Aellen) Cronquist Native CHBEB3

  Bush's goosefoot · Chenopodiaceae 53 counties
• 
  Chenopodium bonus-henricus L. Introduced CHBO

  good King Henry · Chenopodiaceae 1 county
• 
  Chenopodium capitatum (L.) Asch. Native CHCA4

  blite goosefoot · Chenopodiaceae 12 counties
• 
  Chenopodium ficifolium Sm. Introduced CHFI4

  figleaf goosefoot · Chenopodiaceae 2 counties
• 
  Chenopodium foggii Wahl Native CHFO3

  Fogg's goosefoot · Chenopodiaceae 5 counties
• 
  Chenopodium glaucum L. Introduced CHGL3

  oakleaf goosefoot · Chenopodiaceae 18 counties
• 
  Chenopodium murale L. Introduced CHMU2

  nettleleaf goosefoot · Chenopodiaceae 14 counties
• 
  Chenopodium opulifolium Schrad. ex W.D.J. Koch & Ziz Introduced CHOP

  seaport goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium polyspermum L. Introduced CHPO

  manyseed goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium polyspermum L. var. acutifolium (Sm.) Gaudich. Introduced CHPOA

  manyseed goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium polyspermum L. var. obtusifolium Gaudich. Introduced CHPOO

  manyseed goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium pratericola Rydb. Native CHPR5

  desert goosefoot · Chenopodiaceae 5 counties
• 
  Chenopodium rubrum L. Native CHRU

  red goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium simplex (Torr.) Raf. Native CHSI2

  mapleleaf goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium standleyanum Aellen Native CHST2

  Standley's goosefoot · Chenopodiaceae 28 counties
• 
  Chenopodium urbicum L. Introduced CHUR

  city goosefoot · Chenopodiaceae 11 counties
• 
  Chenopodium vulvaria L. Introduced CHVU

  stinking goosefoot · Chenopodiaceae 1 county
• 
  Chimaphila maculata (L.) Pursh Native CHMA3

  striped prince's pine · Pyrolaceae 48 counties
• 
  Chimaphila umbellata (L.) W.P.C. Barton Native CHUM

  pipsissewa · Pyrolaceae 51 counties
• 
  Chimaphila umbellata (L.) W.P.C. Barton ssp. cisatlantica (S.F. Blake) Hultén Native CHUMC2

  pipsissewa · Pyrolaceae 51 counties
• 
  Chionanthus virginicus L. Native CHVI3

  white fringetree · Oleaceae 13 counties
• 
  Chloris verticillata Nutt. Native CHVE2

  tumble windmill grass · Poaceae 2 counties
• 
  Chloris virgata Sw. Native CHVI4

  feather fingergrass · Poaceae 1 county
• 
  Chondrilla juncea L. Introduced CHJU

  rush skeletonweed · Asteraceae 6 counties
• 
  Chorispora tenella (Pall.) DC. Introduced CHTE2

  crossflower · Brassicaceae 3 counties
• ⚘
  Chrysanthemum ×morifolium Ramat. (pro sp.) Introduced CHMO14

  florist's daisy · Asteraceae 3 counties
• 
  Chrysogonum virginianum L. Native CHVI5

  green and gold · Asteraceae 2 counties
• 
  Chrysogonum virginianum L. var. virginianum Native CHVIV

  green and gold · Asteraceae 2 counties
• 
  Chrysopsis mariana (L.) Elliott Native CHMA14

  Maryland goldenaster · Asteraceae 8 counties
• 
  Chrysosplenium americanum Schwein. ex Hook. Native CHAM2

  American golden saxifrage · Saxifragaceae 65 counties
• 
  Cichorium endivia L. Introduced CIEN

  cultivated endive · Asteraceae 3 counties
• 
  Cichorium intybus L. Introduced CIIN

  chicory · Asteraceae 64 counties
• 
  Cicuta bulbifera L. Native CIBU

  bulblet-bearing water hemlock · Apiaceae 38 counties
• 
  Cicuta maculata L. Native CIMA2

  spotted water hemlock · Apiaceae 65 counties
• 
  Cicuta maculata L. var. maculata Native CIMAM

  spotted water hemlock · Apiaceae 65 counties
• 
  Cinna arundinacea L. Native CIAR2

  sweet woodreed · Poaceae 63 counties
• 
  Cinna latifolia (Trevis. ex Goepp.) Griseb. Native CILA2

  drooping woodreed · Poaceae 29 counties
• 
  Circaea alpina L. Native CIAL

  small enchanter's nightshade · Onagraceae 49 counties
• 
  Circaea alpina L. ssp. alpina Native CIALA

  small enchanter's nightshade · Onagraceae 49 counties
• 
  Circaea lutetiana L. Native CILU

  broadleaf enchanter's nightshade · Onagraceae 65 counties
• 
  Circaea lutetiana L. ssp. canadensis (L.) Asch. & Magnus Native CILUC

  broadleaf enchanter's nightshade · Onagraceae 65 counties
• ⚘
  Circaea ×intermedia Ehrh. (pro sp.) [alpina × lutetiana] Native CIIN4

  enchanter's nightshade · Onagraceae 19 counties
• 
  Cirsium altissimum (L.) Hill Native CIAL2

  tall thistle · Asteraceae 26 counties
• 
  Cirsium arvense (L.) Scop. Introduced CIAR4

  Canada thistle · Asteraceae 61 counties
• 
  Cirsium discolor (Muhl. ex Willd.) Spreng. Native CIDI

  field thistle · Asteraceae 48 counties
• 
  Cirsium horridulum Michx. Native CIHO2

  yellow thistle · Asteraceae 7 counties
• 
  Cirsium horridulum Michx. var. horridulum Native CIHOH

  yellow thistle · Asteraceae 7 counties