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 3,301–3,350 of 3,901.

• ⚘
  Silphium trifoliatum L. var. trifoliatum Native SITRT

  whorled rosinweed · Asteraceae 26 counties
• 
  Silybum marianum (L.) Gaertn. Introduced SIMA3

  blessed milkthistle · Asteraceae 2 counties
• 
  Sinapis alba L. Introduced SIAL5

  white mustard · Brassicaceae 12 counties
• 
  Sinapis arvensis L. Introduced SIAR4

  charlock mustard · Brassicaceae 52 counties
• 
  Sinapis arvensis L. ssp. arvensis Introduced SIARA

  wild mustard · Brassicaceae 52 counties
• 
  Sisymbrium altissimum L. Introduced SIAL2

  tall tumblemustard · Brassicaceae 39 counties
• 
  Sisymbrium irio L. Introduced SIIR

  London rocket · Brassicaceae 1 county
• 
  Sisymbrium loeselii L. Introduced SILO3

  small tumbleweed mustard · Brassicaceae 1 county
• 
  Sisymbrium officinale (L.) Scop. Introduced SIOF

  hedgemustard · Brassicaceae 56 counties
• 
  Sisyrinchium albidum Raf. Native SIAL3

  white blue-eyed grass · Iridaceae 1 county
• 
  Sisyrinchium angustifolium Mill. Native SIAN3

  narrowleaf blue-eyed grass · Iridaceae 67 counties
• 
  Sisyrinchium atlanticum E.P. Bicknell Native SIAT

  eastern blue-eyed grass · Iridaceae 9 counties
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  Sisyrinchium fuscatum E.P. Bicknell Native SIFU2

  coastal plain blue-eyed grass · Iridaceae 1 county
• 
  Sisyrinchium montanum Greene Native SIMO2

  strict blue-eyed grass · Iridaceae 19 counties
• 
  Sisyrinchium montanum Greene var. crebrum Fernald Native SIMOC

  strict blue-eyed grass · Iridaceae 19 counties
• 
  Sisyrinchium mucronatum Michx. Native SIMU3

  needletip blue-eyed grass · Iridaceae 46 counties
• 
  Sium suave Walter Native SISU2

  hemlock waterparsnip · Apiaceae 44 counties
• 
  Smallanthus uvedalius (L.) Mack. ex Small Native SMUV

  hairy leafcup · Asteraceae 19 counties
• 
  Smilax ecirrhata (Engelm. ex Kunth) S. Watson Native SMEC

  upright carrionflower · Smilacaceae 1 county
• 
  Smilax glauca Walter Native SMGL

  cat greenbrier · Smilacaceae 38 counties
• 
  Smilax herbacea L. Native SMHE

  smooth carrionflower · Smilacaceae 61 counties
• 
  Smilax pseudochina L. Native SMPS

  bamboo vine · Smilacaceae 1 county
• 
  Smilax pulverulenta Michx. Native SMPU2

  downy carrionflower · Smilacaceae 15 counties
• 
  Smilax rotundifolia L. Native SMRO

  roundleaf greenbrier · Smilacaceae 59 counties
• 
  Smilax tamnoides L. Native SMTA2

  bristly greenbrier · Smilacaceae 59 counties
• 
  Solanum carolinense L. Native SOCA3

  Carolina horsenettle · Solanaceae 61 counties
• 
  Solanum carolinense L. var. carolinense Native SOCAC4

  Carolina horsenettle · Solanaceae 61 counties
• 
  Solanum dulcamara L. Introduced SODU

  climbing nightshade · Solanaceae 64 counties
• 
  Solanum dulcamara L. var. dulcamara Introduced SODUD

  climbing nightshade · Solanaceae 64 counties
• 
  Solanum dulcamara L. var. villosissimum Desv. Introduced SODUV

  climbing nightshade · Solanaceae 2 counties
• 
  Solanum lycopersicum L. Introduced SOLY2

  garden tomato · Solanaceae 20 counties
• 
  Solanum lycopersicum L. var. lycopersicum Introduced SOLYL

  garden tomato · Solanaceae 20 counties
• 
  Solanum nigrum L. Introduced SONI

  black nightshade · Solanaceae 1 county
• 
  Solanum physalifolium Rusby Introduced SOPH

  hoe nightshade · Solanaceae 1 county
• 
  Solanum ptycanthum Dunal Native SOPT7

  West Indian nightshade · Solanaceae 44 counties
• 
  Solanum rostratum Dunal Native SORO

  buffalobur nightshade · Solanaceae 16 counties
• 
  Solanum sisymbriifolium Lam. Introduced SOSI

  sticky nightshade · Solanaceae 1 county
• 
  Solanum tuberosum L. Introduced SOTU

  Irish potato · Solanaceae 9 counties
• 
  Solanum villosum (L.) Mill. Introduced SOVI8

  hairy nightshade · Solanaceae 1 county
• 
  Solidago altissima L. Native SOAL6

  Canada goldenrod · Asteraceae 57 counties
• 
  Solidago arguta Aiton Native SOAR

  Atlantic goldenrod · Asteraceae 50 counties
• 
  Solidago arguta Aiton var. arguta Native SOARA

  Atlantic goldenrod · Asteraceae 50 counties
• 
  Solidago arguta Aiton var. harrisii (Steele) Cronquist Native SOARH

  Harris' goldenrod · Asteraceae 3 counties
• 
  Solidago bicolor L. Native SOBI

  white goldenrod · Asteraceae 66 counties
• 
  Solidago caesia L. Native SOCA4

  wreath goldenrod · Asteraceae 65 counties
• 
  Solidago canadensis L. Native SOCA6

  Canada goldenrod · Asteraceae 60 counties
• 
  Solidago canadensis L. var. canadensis Native SOCAC3

  Canada goldenrod · Asteraceae 45 counties
• 
  Solidago canadensis L. var. hargeri Fernald Native SOCAH

  Harger's goldenrod · Asteraceae 51 counties
• 
  Solidago curtisii Torr. & A. Gray Native SOCU

  mountain decumbent goldenrod · Asteraceae 2 counties
• 
  Solidago erecta Pursh Native SOER

  showy goldenrod · Asteraceae 6 counties