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 2,901–2,950 of 3,901.

• 
  Quercus montana Willd. Native QUMO4

  chestnut oak · Fagaceae 67 counties
• 
  Quercus muehlenbergii Engelm. Native QUMU

  chinquapin oak · Fagaceae 29 counties
• 
  Quercus palustris Münchh. Native QUPA2

  pin oak · Fagaceae 44 counties
• 
  Quercus phellos L. Native QUPH

  willow oak · Fagaceae 5 counties
• 
  Quercus prinoides Willd. Native QUPR

  dwarf chinquapin oak · Fagaceae 40 counties
• 
  Quercus robur L. Introduced QURO2

  English oak · Fagaceae 9 counties
• 
  Quercus rubra L. Native QURU

  northern red oak · Fagaceae 66 counties
• 
  Quercus rubra L. var. ambigua (A. Gray) Fernald Native QURUA

  northern red oak · Fagaceae 1 county
• 
  Quercus shumardii Buckley Native QUSH

  Shumard's oak · Fagaceae 3 counties
• 
  Quercus stellata Wangenh. Native QUST

  post oak · Fagaceae 18 counties
• 
  Quercus velutina Lam. Native QUVE

  black oak · Fagaceae 61 counties
• ⚘
  Quercus ×heterophylla Michx. f. (pro sp.) [phellos × rubra] Native QUHE

  Bartram oak · Fagaceae 6 counties
• ⚘
  Quercus ×leana Nutt. (pro sp.) [imbricaria × velutina] Native QULE

  hybrid oak · Fagaceae 9 counties
• 
  Quercus ×rehderi Trel. [ilicifolia × velutina] Native QURE

  hybrid oak · Fagaceae 5 counties
• ⚘
  Quercus ×runcinata (A. DC.) Engelm. [imbricaria × rubra] Native QURU3

  hybrid oak · Fagaceae 4 counties
• ⚘
  Quercus ×saulii C.K. Schneid. [alba × montana] Native QUSA

  hybrid oak · Fagaceae 14 counties
• 
  Ranunculus abortivus L. Native RAAB

  littleleaf buttercup · Ranunculaceae 67 counties
• 
  Ranunculus acris L. Both RAAC3

  tall buttercup · Ranunculaceae 61 counties
• 
  Ranunculus acris L. var. acris Introduced RAACA3

  showy buttercup · Ranunculaceae 61 counties
• 
  Ranunculus allegheniensis Britton Native RAAL2

  Allegheny Mountain buttercup · Ranunculaceae 27 counties
• 
  Ranunculus ambigens S. Watson Native RAAM

  waterplantain spearwort · Ranunculaceae 35 counties
• 
  Ranunculus arvensis L. Introduced RAAR3

  corn buttercup · Ranunculaceae 1 county
• 
  Ranunculus bulbosus L. Introduced RABU

  St. Anthony's turnip · Ranunculaceae 36 counties
• 
  Ranunculus fascicularis Muhl. ex Bigelow Native RAFA

  early buttercup · Ranunculaceae 9 counties
• 
  Ranunculus ficaria L. Introduced RAFI

  fig buttercup · Ranunculaceae 11 counties
• 
  Ranunculus ficaria L. var. bulbifera Marsden-Jones Introduced RAFIB

  fig buttercup · Ranunculaceae 10 counties
• 
  Ranunculus flabellaris Raf. Native RAFL

  yellow water buttercup · Ranunculaceae 15 counties
• 
  Ranunculus flammula L. Native RAFL2

  greater creeping spearwort · Ranunculaceae 8 counties
• 
  Ranunculus flammula L. var. filiformis (Michx.) Hook. Native RAFLF

  greater creeping spearwort · Ranunculaceae 5 counties
• 
  Ranunculus flammula L. var. flammula Native RAFLF2

  greater creeping spearwort · Ranunculaceae 6 counties
• 
  Ranunculus hederaceus L. Native RAHE2

  ivy buttercup · Ranunculaceae 1 county
• 
  Ranunculus hispidus Michx. Native RAHI

  bristly buttercup · Ranunculaceae 63 counties
• 
  Ranunculus hispidus Michx. var. caricetorum (Greene) T. Duncan Native RAHIC

  bristly buttercup · Ranunculaceae 51 counties
• 
  Ranunculus hispidus Michx. var. hispidus Native RAHIH

  bristly buttercup · Ranunculaceae 1 county
• 
  Ranunculus hispidus Michx. var. nitidus (Chapm.) T. Duncan Native RAHIN

  bristly buttercup · Ranunculaceae 1 county
• 
  Ranunculus longirostris Godr. Native RALO2

  longbeak buttercup · Ranunculaceae 11 counties
• 
  Ranunculus micranthus Nutt. Native RAMI2

  rock buttercup · Ranunculaceae 11 counties
• 
  Ranunculus pensylvanicus L. f. Native RAPE2

  Pennsylvania buttercup · Ranunculaceae 21 counties
• 
  Ranunculus pusillus Poir. Native RAPU

  low spearwort · Ranunculaceae 6 counties
• 
  Ranunculus pusillus Poir. var. pusillus Native RAPUP

  low spearwort · Ranunculaceae 6 counties
• 
  Ranunculus recurvatus Poir. Native RARE2

  blisterwort · Ranunculaceae 66 counties
• 
  Ranunculus recurvatus Poir. var. recurvatus Native RARER2

  blisterwort · Ranunculaceae 66 counties
• 
  Ranunculus repens L. Introduced RARE3

  creeping buttercup · Ranunculaceae 49 counties
• 
  Ranunculus sardous Crantz Introduced RASA

  hairy buttercup · Ranunculaceae 3 counties
• 
  Ranunculus sceleratus L. Native RASC3

  cursed buttercup · Ranunculaceae 16 counties
• 
  Ranunculus sceleratus L. var. sceleratus Native RASCS

  cursed buttercup · Ranunculaceae 16 counties
• 
  Ranunculus trichophyllus Chaix Native RATR

  threadleaf crowfoot · Ranunculaceae 20 counties
• 
  Ranunculus trichophyllus Chaix var. trichophyllus Native RATRT

  threadleaf crowfoot · Ranunculaceae 20 counties
• 
  Raphanus raphanistrum L. Introduced RARA2

  wild radish · Brassicaceae 31 counties
• ⚘
  Raphanus sativus L. Introduced RASA2

  cultivated radish · Brassicaceae 35 counties