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 801–850 of 2,748 (native).

• 
  Cypripedium parviflorum Salisb. var. parviflorum Native CYPAP4

  lesser yellow lady's slipper · Orchidaceae 14 counties
• 
  Cypripedium parviflorum Salisb. var. pubescens (Willd.) Knight Native CYPAP3

  greater yellow lady's slipper · Orchidaceae 53 counties
• 
  Cypripedium reginae Walter Native CYRE6

  showy lady's slipper · Orchidaceae 14 counties
• 
  Cystopteris bulbifera (L.) Bernh. Native CYBU3

  bulblet bladderfern · Dryopteridaceae 41 counties
• 
  Cystopteris fragilis (L.) Bernh. Native CYFR2

  brittle bladderfern · Dryopteridaceae 31 counties
• 
  Cystopteris protrusa (Weath.) Blasdell Native CYPR4

  lowland bladderfern · Dryopteridaceae 30 counties
• 
  Cystopteris tenuis (Michx.) Desv. Native CYTE7

  upland brittle bladderfern · Dryopteridaceae 65 counties
• 
  Dactylorhiza viridis (L.) R.M. Bateman, A.M. Pridgeon & M.W. Chase Native DAVI6

  longbract frog orchid · Orchidaceae 18 counties
• 
  Dalibarda repens L. Native DARE

  robin runaway · Rosaceae 36 counties
• 
  Danthonia compressa Austin Native DACO

  flattened oatgrass · Poaceae 55 counties
• 
  Danthonia spicata (L.) P. Beauv. ex Roem. & Schult. Native DASP2

  poverty oatgrass · Poaceae 66 counties
• 
  Dasiphora fruticosa (L.) Rydb. Native DAFR6

  shrubby cinquefoil · Rosaceae 2 counties
• 
  Dasiphora fruticosa (L.) Rydb. ssp. floribunda (Pursh) Kartesz Native DAFRF

  shrubby cinquefoil · Rosaceae 2 counties
• 
  Datura quercifolia Kunth Native DAQU

  Chinese thorn-apple · Solanaceae 1 county
• 
  Datura wrightii Regel Native DAWR2

  sacred thorn-apple · Solanaceae 8 counties
• 
  Decodon verticillatus (L.) Elliott Native DEVE

  swamp loosestrife · Lythraceae 20 counties
• 
  Delphinium exaltatum Aiton Native DEEX

  tall larkspur · Ranunculaceae 7 counties
• 
  Delphinium tricorne Michx. Native DETR

  dwarf larkspur · Ranunculaceae 13 counties
• 
  Dennstaedtia punctilobula (Michx.) T. Moore Native DEPU2

  eastern hayscented fern · Dennstaedtiaceae 67 counties
• 
  Deparia acrostichoides (Sw.) M. Kato Native DEAC4

  silver false spleenwort · Dryopteridaceae 65 counties
• 
  Deschampsia cespitosa (L.) P. Beauv. Native DECE

  tufted hairgrass · Poaceae 16 counties
• 
  Deschampsia flexuosa (L.) Trin. Native DEFL

  wavy hairgrass · Poaceae 33 counties
• 
  Deschampsia flexuosa (L.) Trin. var. flexuosa Native DEFLF

  wavy hairgrass · Poaceae 33 counties
• 
  Descurainia pinnata (Walter) Britton Native DEPI

  western tansymustard · Brassicaceae 2 counties
• 
  Descurainia pinnata (Walter) Britton ssp. brachycarpa (Richardson) Detling Native DEPIB

  western tansymustard · Brassicaceae 2 counties
• 
  Desmodium canadense (L.) DC. Native DECA7

  showy ticktrefoil · Fabaceae 54 counties
• 
  Desmodium canescens (L.) DC. Native DECA8

  hoary ticktrefoil · Fabaceae 31 counties
• 
  Desmodium ciliare (Muhl. ex Willd.) DC. Native DECI

  hairy small-leaf ticktrefoil · Fabaceae 17 counties
• 
  Desmodium ciliare (Muhl. ex Willd.) DC. var. ciliare Native DECIC

  hairy small-leaf ticktrefoil · Fabaceae 16 counties
• 
  Desmodium cuspidatum (Muhl. ex Willd.) DC. ex D. Don Native DECU

  largebract ticktrefoil · Fabaceae 31 counties
• 
  Desmodium cuspidatum (Muhl. ex Willd.) DC. ex D. Don var. cuspidatum Native DECUC

  largebract ticktrefoil · Fabaceae 31 counties
• 
  Desmodium glabellum (Michx.) DC. Native DEGL4

  Dillenius' ticktrefoil · Fabaceae 9 counties
• 
  Desmodium glutinosum (Muhl. ex Willd.) Alph. Wood Native DEGL5

  pointedleaf ticktrefoil · Fabaceae 56 counties
• ⚘
  Desmodium humifusum (Muhl. ex Bigelow) Beck Native DEHU3

  eastern trailing ticktrefoil · Fabaceae 4 counties
• 
  Desmodium laevigatum (Nutt.) DC. Native DELA2

  smooth ticktrefoil · Fabaceae 11 counties
• 
  Desmodium marilandicum (L.) DC. Native DEMA2

  smooth small-leaf ticktrefoil · Fabaceae 25 counties
• 
  Desmodium nudiflorum (L.) DC. Native DENU4

  nakedflower ticktrefoil · Fabaceae 60 counties
• 
  Desmodium nuttallii (Schindl.) B.G. Schub. Native DENU5

  Nuttall's ticktrefoil · Fabaceae 9 counties
• 
  Desmodium obtusum (Muhl. ex Willd.) DC. Native DEOB5

  stiff ticktrefoil · Fabaceae 13 counties
• 
  Desmodium paniculatum (L.) DC. Native DEPA6

  panicledleaf ticktrefoil · Fabaceae 57 counties
• 
  Desmodium paniculatum (L.) DC. var. paniculatum Native DEPAP2

  panicledleaf ticktrefoil · Fabaceae 57 counties
• 
  Desmodium perplexum B.G. Schub. Native DEPE80

  perplexed ticktrefoil · Fabaceae 53 counties
• 
  Desmodium rotundifolium DC. Native DERO3

  prostrate ticktrefoil · Fabaceae 43 counties
• 
  Desmodium sessilifolium (Torr.) Torr. & A. Gray Native DESE

  sessileleaf ticktrefoil · Fabaceae 3 counties
• 
  Desmodium viridiflorum (L.) DC. Native DEVI4

  velvetleaf ticktrefoil · Fabaceae 4 counties
• 
  Diarrhena obovata (Gleason) Brandenburg Native DIOB3

  obovate beakgrain · Poaceae 2 counties
• 
  Dicentra canadensis (Goldie) Walp. Native DICA

  squirrel corn · Fumariaceae 42 counties
• 
  Dicentra cucullaria (L.) Bernh. Native DICU

  dutchman's breeches · Fumariaceae 55 counties
• 
  Dicentra eximia (Ker Gawl.) Torr. Native DIEX

  turkey corn · Fumariaceae 7 counties
• 
  Dichanthelium acuminatum (Sw.) Gould & C.A. Clark Native DIAC2

  tapered rosette grass · Poaceae 66 counties