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 201–250 of 3,901.

• 
  Antennaria howellii Greene ssp. petaloidea (Fernald) Bayer Native ANHOP

  small pussytoes · Asteraceae 14 counties
• ⚘
  Antennaria neglecta Greene Native ANNE

  field pussytoes · Asteraceae 42 counties
• 
  Antennaria parlinii Fernald Native ANPA9

  Parlin's pussytoes · Asteraceae 56 counties
• 
  Antennaria parlinii Fernald ssp. fallax (Greene) Bayer & Stebbins Native ANPAF

  Parlin's pussytoes · Asteraceae 47 counties
• 
  Antennaria parlinii Fernald ssp. parlinii Native ANPAP

  Parlin's pussytoes · Asteraceae 46 counties
• 
  Antennaria plantaginifolia (L.) Richardson Native ANPL

  woman's tobacco · Asteraceae 57 counties
• 
  Antennaria solitaria Rydb. Native ANSO

  singlehead pussytoes · Asteraceae 2 counties
• 
  Antennaria virginica Stebbins Native ANVI13

  shale barren pussytoes · Asteraceae 9 counties
• 
  Anthemis arvensis L. Introduced ANAR6

  corn chamomile · Asteraceae 46 counties
• 
  Anthemis cotula L. Introduced ANCO2

  stinking chamomile · Asteraceae 57 counties
• 
  Anthemis tinctoria L. Introduced ANTI

  golden chamomile · Asteraceae 15 counties
• 
  Anthoxanthum aristatum Boiss. Introduced ANAR7

  annual vernalgrass · Poaceae 6 counties
• 
  Anthoxanthum odoratum L. Introduced ANOD

  sweet vernalgrass · Poaceae 65 counties
• 
  Anthoxanthum odoratum L. ssp. odoratum Introduced ANODO2

  sweet vernalgrass · Poaceae 65 counties
• 
  Anthriscus cerefolium (L.) Hoffm. Introduced ANCE

  garden chervil · Apiaceae 3 counties
• 
  Anthriscus sylvestris (L.) Hoffm. Introduced ANSY

  wild chervil · Apiaceae 8 counties
• 
  Anthyllis vulneraria L. Introduced ANVU

  common kidneyvetch · Fabaceae 2 counties
• 
  Antirrhinum majus L. Introduced ANMA3

  garden snapdragon · Scrophulariaceae 9 counties
• 
  Apera spica-venti (L.) P. Beauv. Introduced APSP

  loose silkybent · Poaceae 2 counties
• 
  Apios americana Medik. Native APAM

  groundnut · Fabaceae 58 counties
• 
  Apium graveolens L. Introduced APGR2

  wild celery · Apiaceae 5 counties
• 
  Apium graveolens L. var. dulce (Mill.) DC. Introduced APGRD

  wild celery · Apiaceae 5 counties
• 
  Aplectrum hyemale (Muhl. ex Willd.) Torr. Native APHY

  Adam and Eve · Orchidaceae 17 counties
• 
  Apocynum androsaemifolium L. Native APAN2

  spreading dogbane · Apocynaceae 67 counties
• 
  Apocynum cannabinum L. Native APCA

  Indianhemp · Apocynaceae 66 counties
• ⚘
  Apocynum ×floribundum Greene (pro sp.) [androsaemifolium × cannabinum] Native APFL

  Apocynaceae 41 counties
• 
  Aquilegia canadensis L. Native AQCA

  red columbine · Ranunculaceae 67 counties
• 
  Aquilegia vulgaris L. Introduced AQVU

  European columbine · Ranunculaceae 33 counties
• 
  Arabidopsis thaliana (L.) Heynh. Introduced ARTH

  mouseear cress · Brassicaceae 42 counties
• 
  Arabis canadensis L. Native ARCA

  sicklepod · Brassicaceae 55 counties
• 
  Arabis glabra (L.) Bernh. Native ARGL

  tower rockcress · Brassicaceae 39 counties
• 
  Arabis hirsuta (L.) Scop. Native ARHI

  hairy rockcress · Brassicaceae 14 counties
• 
  Arabis hirsuta (L.) Scop. var. pycnocarpa (M. Hopkins) Rollins Native ARHIP

  creamflower rockcress · Brassicaceae 14 counties
• 
  Arabis laevigata (Muhl. ex Willd.) Poir. Native ARLA

  smooth rockcress · Brassicaceae 62 counties
• 
  Arabis laevigata (Muhl. ex Willd.) Poir. var. burkii Porter Native ARLAB

  Burk's smooth rockcress · Brassicaceae 17 counties
• 
  Arabis laevigata (Muhl. ex Willd.) Poir. var. laevigata Native ARLAL

  smooth rockcress · Brassicaceae 61 counties
• 
  Arabis lyrata L. Native ARLY2

  lyrate rockcress · Brassicaceae 48 counties
• 
  Arabis missouriensis Greene Native ARMI5

  green rockcress · Brassicaceae 3 counties
• 
  Arabis patens Sull. Native ARPA2

  spreading rockcress · Brassicaceae 12 counties
• 
  Arabis shortii (Fernald) Gleason Native ARSH2

  Short's rockcress · Brassicaceae 18 counties
• 
  Arachis hypogaea L. Introduced ARHY

  peanut · Fabaceae 3 counties
• 
  Aralia chinensis L. Introduced ARCH12

  Chinese angelica tree · Araliaceae 1 county
• 
  Aralia hispida Vent. Native ARHI2

  bristly sarsaparilla · Araliaceae 47 counties
• 
  Aralia nudicaulis L. Native ARNU2

  wild sarsaparilla · Araliaceae 67 counties
• 
  Aralia racemosa L. Native ARRA

  American spikenard · Araliaceae 66 counties
• 
  Aralia racemosa L. ssp. racemosa Native ARRAR

  American spikenard · Araliaceae 66 counties
• 
  Aralia spinosa L. Native ARSP2

  devil's walkingstick · Araliaceae 40 counties
• 
  Arceuthobium pusillum Peck Native ARPU3

  eastern dwarf mistletoe · Viscaceae 7 counties
• 
  Arctium lappa L. Introduced ARLA3

  greater burdock · Asteraceae 18 counties
• 
  Arctium minus Bernh. Introduced ARMI2

  lesser burdock · Asteraceae 63 counties