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 2,551–2,600 of 3,901.

• 
  Phlox paniculata L. Native PHPA9

  fall phlox · Polemoniaceae 53 counties
• 
  Phlox pilosa L. Native PHPI

  downy phlox · Polemoniaceae 11 counties
• 
  Phlox pilosa L. ssp. pilosa Native PHPIP2

  downy phlox · Polemoniaceae 11 counties
• 
  Phlox stolonifera Sims Native PHST3

  creeping phlox · Polemoniaceae 17 counties
• 
  Phlox subulata L. Native PHSU3

  moss phlox · Polemoniaceae 38 counties
• 
  Phlox subulata L. ssp. brittonii (Small) Wherry Native PHSUB2

  Britton's phlox · Polemoniaceae 2 counties
• 
  Phlox subulata L. ssp. subulata Native PHSUS2

  moss phlox · Polemoniaceae 38 counties
• 
  Phoradendron leucarpum (Raf.) Reveal & M.C. Johnst. Native PHLE14

  oak mistletoe · Viscaceae 4 counties
• 
  Photinia villosa (Thunb.) DC. Introduced PHVI81

  Oriental photinia · Rosaceae 2 counties
• 
  Phragmites australis (Cav.) Trin. ex Steud. Both PHAU7

  common reed · Poaceae 22 counties
• 
  Phragmites australis (Cav.) Trin. ex Steud. ssp. australis Introduced PHAUA7

  European common reed · Poaceae 6 counties
• 
  Phryma leptostachya L. Native PHLE5

  American lopseed · Verbenaceae 49 counties
• 
  Phyla lanceolata (Michx.) Greene Native PHLA3

  lanceleaf fogfruit · Verbenaceae 13 counties
• 
  Phyllanthus caroliniensis Walter Native PHCA9

  Carolina leaf-flower · Euphorbiaceae 4 counties
• 
  Phyllanthus caroliniensis Walter ssp. caroliniensis Native PHCAC

  Carolina leaf-flower · Euphorbiaceae 4 counties
• 
  Physalis alkekengi L. Introduced PHAL5

  strawberry groundcherry · Solanaceae 16 counties
• 
  Physalis heterophylla Nees Native PHHE5

  clammy groundcherry · Solanaceae 50 counties
• 
  Physalis heterophylla Nees var. heterophylla Native PHHEH3

  clammy groundcherry · Solanaceae 50 counties
• 
  Physalis longifolia Nutt. Native PHLO4

  longleaf groundcherry · Solanaceae 48 counties
• 
  Physalis longifolia Nutt. var. subglabrata (Mack. & Bush) Cronquist Native PHLOS

  longleaf groundcherry · Solanaceae 48 counties
• 
  Physalis philadelphica Lam. Introduced PHPH2

  Mexican groundcherry · Solanaceae 3 counties
• 
  Physalis philadelphica Lam. var. immaculata Waterf. Introduced PHPHI

  Mexican groundcherry · Solanaceae 3 counties
• 
  Physalis pubescens L. Native PHPU7

  husk tomato · Solanaceae 14 counties
• 
  Physalis pubescens L. var. integrifolia (Dunal) Waterf. Native PHPUI

  husk tomato · Solanaceae 11 counties
• 
  Physalis pubescens L. var. pubescens Native PHPUP4

  husk tomato · Solanaceae 4 counties
• 
  Physalis virginiana Mill. Native PHVI5

  Virginia groundcherry · Solanaceae 7 counties
• 
  Physalis virginiana Mill. var. virginiana Native PHVIV3

  Virginia groundcherry · Solanaceae 6 counties
• 
  Physocarpus opulifolius (L.) Maxim. var. opulifolius Native PHOPO

  common ninebark · Rosaceae 62 counties
• 
  Physocarpus opulifolius (L.) Maxim., orth. cons. Native PHOP

  common ninebark · Rosaceae 62 counties
• 
  Physostegia virginiana (L.) Benth. Native PHVI8

  obedient plant · Lamiaceae 44 counties
• 
  Physostegia virginiana (L.) Benth. ssp. virginiana Native PHVIV

  obedient plant · Lamiaceae 44 counties
• 
  Phytolacca americana L. Native PHAM4

  American pokeweed · Phytolaccaceae 64 counties
• 
  Phytolacca americana L. var. americana Native PHAMA3

  American pokeweed · Phytolaccaceae 64 counties
• 
  Picea abies (L.) Karst. Introduced PIAB

  Norway spruce · Pinaceae 14 counties
• 
  Picea glauca (Moench) Voss Native PIGL

  white spruce · Pinaceae 7 counties
• 
  Picea mariana (Mill.) Britton, Sterns & Poggenb. Native PIMA

  black spruce · Pinaceae 17 counties
• 
  Picea pungens Engelm. Native PIPU

  blue spruce · Pinaceae 3 counties
• 
  Picea rubens Sarg. Native PIRU

  red spruce · Pinaceae 13 counties
• 
  Picris echioides L. Introduced PIEC

  bristly oxtongue · Asteraceae 3 counties
• 
  Picris hieracioides L. Both PIHI

  hawkweed oxtongue · Asteraceae 16 counties
• 
  Picris hieracioides L. ssp. hieracioides Introduced PIHIH

  hawkweed oxtongue · Asteraceae 16 counties
• 
  Pilea fontana (Lunell) Rydb. Native PIFO

  lesser clearweed · Urticaceae 9 counties
• 
  Pilea pumila (L.) A. Gray Native PIPU2

  Canadian clearweed · Urticaceae 66 counties
• 
  Pilea pumila (L.) A. Gray var. pumila Native PIPUP

  Canadian clearweed · Urticaceae 66 counties
• 
  Pimpinella major (L.) Huds. Introduced PIMA6

  hollowstem burnet saxifrage · Apiaceae 1 county
• 
  Pimpinella saxifraga L. Introduced PISA

  solidstem burnet saxifrage · Apiaceae 16 counties
• 
  Pimpinella saxifraga L. ssp. saxifraga Introduced PISAS

  solidstem burnet saxifrage · Apiaceae 16 counties
• 
  Pinellia ternata (Thunb.) Makino ex Breitenbach Introduced PITE

  crowdipper · Araceae 3 counties
• 
  Pinus banksiana Lamb. Native PIBA2

  jack pine · Pinaceae 9 counties
• 
  Pinus echinata Mill. Native PIEC2

  shortleaf pine · Pinaceae 15 counties