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 451–500 of 3,901.

• 
  Bromus racemosus L. Introduced BRRA2

  bald brome · Poaceae 56 counties
• 
  Bromus secalinus L. Introduced BRSE

  rye brome · Poaceae 35 counties
• 
  Bromus secalinus L. var. secalinus Introduced BRSES

  rye brome · Poaceae 35 counties
• 
  Bromus squarrosus L. Introduced BRSQ2

  corn brome · Poaceae 1 county
• 
  Bromus sterilis L. Introduced BRST2

  poverty brome · Poaceae 23 counties
• 
  Bromus tectorum L. Introduced BRTE

  cheatgrass · Poaceae 41 counties
• 
  Broussonetia papyrifera (L.) L'Hér. ex Vent. Introduced BRPA4

  paper mulberry · Moraceae 15 counties
• 
  Buchnera americana L. Native BUAM

  American bluehearts · Scrophulariaceae 4 counties
• 
  Buddleja davidii Franch. Introduced BUDA2

  orange eye butterflybush · Buddlejaceae 14 counties
• 
  Buglossoides arvensis (L.) I.M. Johnst. Introduced BUAR3

  corn gromwell · Boraginaceae 40 counties
• 
  Bulbostylis capillaris (L.) Kunth ex C.B. Clarke Native BUCA2

  densetuft hairsedge · Cyperaceae 52 counties
• 
  Bulbostylis capillaris (L.) Kunth ex C.B. Clarke ssp. capillaris Native BUCAC

  densetuft hairsedge · Cyperaceae 52 counties
• 
  Bunias orientalis L. Introduced BUOR

  Turkish wartycabbage · Brassicaceae 2 counties
• 
  Bupleurum rotundifolium L. Introduced BURO

  hare's ear · Apiaceae 7 counties
• 
  Butomus umbellatus L. Introduced BUUM

  flowering rush · Butomaceae 1 county
• 
  Cabomba caroliniana A. Gray Native CACA

  Carolina fanwort · Cabombaceae 5 counties
• 
  Cabomba caroliniana A. Gray var. caroliniana Native CACAC4

  Carolina fanwort · Cabombaceae 5 counties
• 
  Cakile edentula (Bigelow) Hook. Native CAED

  American searocket · Brassicaceae 1 county
• 
  Cakile edentula (Bigelow) Hook. ssp. edentula Native CAEDE

  American searocket · Brassicaceae 1 county
• 
  Cakile edentula (Bigelow) Hook. ssp. edentula var. lacustris Fernald Native CAEDL2

  American searocket · Brassicaceae 1 county
• 
  Cakile maritima Scop. Introduced CAMA

  European searocket · Brassicaceae 2 counties
• 
  Calamagrostis canadensis (Michx.) P. Beauv. Native CACA4

  bluejoint · Poaceae 48 counties
• 
  Calamagrostis canadensis (Michx.) P. Beauv. var. canadensis Native CACAC10

  bluejoint · Poaceae 48 counties
• 
  Calamagrostis canadensis (Michx.) P. Beauv. var. macouniana (Vasey) Stebbins Native CACAM

  Macoun's reedgrass · Poaceae 10 counties
• 
  Calamagrostis coarctata Eaton Native CACO71

  Nuttall's reedgrass · Poaceae 33 counties
• 
  Calamagrostis epigeios (L.) Roth Introduced CAEP

  chee reedgrass · Poaceae 6 counties
• 
  Calamagrostis porteri A. Gray Native CAPO3

  Porter's reedgrass · Poaceae 13 counties
• 
  Calamagrostis porteri A. Gray ssp. porteri Native CAPOP

  Porter's reedgrass · Poaceae 12 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
• 
  Calamovilfa longifolia (Hook.) Scribn. Native CALO

  prairie sandreed · Poaceae 1 county
• 
  Calamovilfa longifolia (Hook.) Scribn. var. magna Scribn. & Merr. Native CALOM

  prairie sandreed · Poaceae 1 county
• 
  Calendula officinalis L. Introduced CAOF

  pot marigold · Asteraceae 6 counties
• 
  Calla palustris L. Native CAPA

  water arum · Araceae 21 counties
• 
  Calliergonella cuspidata (Hedw.) Loeske Native CACU18

  calliergonella moss · Amblystegiaceae 1 county
• 
  Callirhoe involucrata (Torr. & A. Gray) A. Gray Native CAIN2

  purple poppymallow · Malvaceae 1 county
• 
  Callirhoe involucrata (Torr. & A. Gray) A. Gray var. involucrata Native CAINI4

  purple poppymallow · Malvaceae 1 county
• 
  Callistephus chinensis (L.) Nees Introduced CACH25

  China aster · Asteraceae 1 county
• 
  Callitriche heterophylla Pursh Native CAHE3

  twoheaded water-starwort · Callitrichaceae 57 counties
• 
  Callitriche heterophylla Pursh ssp. heterophylla Native CAHEH

  twoheaded water-starwort · Callitrichaceae 57 counties
• 
  Callitriche palustris L. Native CAPA52

  vernal water-starwort · Callitrichaceae 41 counties
• 
  Callitriche stagnalis Scop. Introduced CAST

  pond water-starwort · Callitrichaceae 13 counties
• 
  Callitriche terrestris Raf. Native CATE19

  terrestrial water-starwort · Callitrichaceae 17 counties
• 
  Calopogon tuberosus (L.) Britton, Sterns & Poggenb. Native CATU5

  tuberous grasspink · Orchidaceae 34 counties
• 
  Calopogon tuberosus (L.) Britton, Sterns & Poggenb. var. tuberosus Native CATUT

  tuberous grasspink · Orchidaceae 34 counties
• 
  Caltha palustris L. Native CAPA5

  yellow marsh marigold · Ranunculaceae 61 counties
• 
  Caltha palustris L. var. palustris Native CAPAP6

  yellow marsh marigold · Ranunculaceae 61 counties
• 
  Calycanthus floridus L. Native CAFL22

  eastern sweetshrub · Calycanthaceae 10 counties
• 
  Calycanthus floridus L. var. floridus Native CAFLF

  eastern sweetshrub · Calycanthaceae 6 counties
• 
  Calycanthus floridus L. var. glaucus (Willd.) Torr. & A. Gray Native CAFLG

  eastern sweetshrub · Calycanthaceae 6 counties