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 951–1,000 of 1,109 (introduced).

• 
  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 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
• 
  Sonchus arvensis L. Introduced SOAR2

  field sowthistle · Asteraceae 45 counties
• 
  Sonchus arvensis L. ssp. arvensis Introduced SOARA2

  field sowthistle · Asteraceae 19 counties
• 
  Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman Introduced SOARU

  moist sowthistle · Asteraceae 44 counties
• 
  Sonchus asper (L.) Hill Introduced SOAS

  spiny sowthistle · Asteraceae 46 counties
• 
  Sonchus oleraceus L. Introduced SOOL

  common sowthistle · Asteraceae 32 counties
• 
  Sorbaria sorbifolia (L.) A. Braun Introduced SOSO2

  false spiraea · Rosaceae 24 counties
• 
  Sorbus aucuparia L. Introduced SOAU

  European mountain ash · Rosaceae 14 counties
• 
  Sorghum bicolor (L.) Moench Introduced SOBI2

  sorghum · Poaceae 22 counties
• 
  Sorghum bicolor (L.) Moench ssp. bicolor Introduced SOBIB

  grain sorghum · Poaceae 16 counties
• 
  Sorghum bicolor (L.) Moench ssp. drummondii (Nees ex Steud.) de Wet & Harlan Introduced SOBID

  Sudangrass · Poaceae 11 counties
• 
  Sorghum halepense (L.) Pers. Introduced SOHA

  Johnsongrass · Poaceae 14 counties
• 
  Sparganium erectum L. Introduced SPER

  simplestem bur-reed · Sparganiaceae 1 county
• 
  Spergula arvensis L. Introduced SPAR

  corn spurry · Caryophyllaceae 23 counties
• 
  Spergularia maritima (All.) Chiov. Introduced SPMA10

  media sandspurry · Caryophyllaceae 1 county
• 
  Spergularia rubra (L.) J. Presl & C. Presl Introduced SPRU

  red sandspurry · Caryophyllaceae 14 counties
• 
  Spinacia oleracea L. Introduced SPOL

  spinach · Chenopodiaceae 1 county
• 
  Spiraea japonica L. f. Introduced SPJA

  Japanese meadowsweet · Rosaceae 15 counties
• 
  Spiraea japonica L. f. var. fortunei (Planch.) Rehder Introduced SPJAF

  fortune meadowsweet · Rosaceae 15 counties
• 
  Spiraea prunifolia Siebold & Zucc. Introduced SPPR

  bridalwreath spirea · Rosaceae 10 counties
• 
  Spiraea thunbergii Siebold ex Blume Introduced SPTH2

  Thunberg's meadowsweet · Rosaceae 1 county
• ⚘
  Spiraea ×bumalda Burven [albiflora × japonica] Introduced SPBU2

  Japanese spiraea · Rosaceae 1 county
• 
  Sporobolus indicus (L.) R. Br. Introduced SPIN4

  smut grass · Poaceae 1 county
• 
  Sporobolus indicus (L.) R. Br. var. indicus Introduced SPINI2

  smut grass · Poaceae 1 county
• 
  Stachys annua (L.) L. Introduced STAN

  annual hedgenettle · Lamiaceae 1 county
• 
  Stachys arvensis (L.) L. Introduced STAR

  staggerweed · Lamiaceae 1 county
• 
  Stachys germanica L. Introduced STGE

  German hedgenettle · Lamiaceae 3 counties
• 
  Stachys sylvatica L. Introduced STSY2

  whitespot · Lamiaceae 1 county
• 
  Stellaria graminea L. Introduced STGR

  grass-like starwort · Caryophyllaceae 54 counties
• 
  Stellaria holostea L. Introduced STHO2

  addersmeat · Caryophyllaceae 2 counties
• 
  Stellaria media (L.) Vill. Introduced STME2

  common chickweed · Caryophyllaceae 63 counties
• 
  Suaeda maritima (L.) Dumort. ssp. maritima Introduced SUMAM

  herbaceous seepweed · Chenopodiaceae 1 county
• 
  Succisella inflexa (Kluk) G. Beck Introduced SUIN2

  southern succisella · Dipsacaceae 2 counties
• 
  Symphytum officinale L. Introduced SYOF

  common comfrey · Boraginaceae 27 counties
• 
  Syringa vulgaris L. Introduced SYVU

  common lilac · Oleaceae 23 counties
• 
  Taeniatherum caput-medusae (L.) Nevski Introduced TACA8

  medusahead · Poaceae 1 county
• 
  Tagetes erecta L. Introduced TAER

  Aztec marigold · Asteraceae 4 counties
• 
  Tagetes minuta L. Introduced TAMI3

  muster John Henry · Asteraceae 1 county
• 
  Tagetes patula L. Introduced TAPA

  French marigold · Asteraceae 6 counties
• 
  Tamarix parviflora DC. Introduced TAPA4

  smallflower tamarisk · Tamaricaceae 3 counties
• 
  Tanacetum balsamita L. Introduced TABA

  costmary · Asteraceae 4 counties
• 
  Tanacetum parthenium (L.) Sch. Bip. Introduced TAPA6

  feverfew · Asteraceae 24 counties
• 
  Tanacetum vulgare L. Introduced TAVU

  common tansy · Asteraceae 46 counties
• 
  Taraxacum laevigatum (Willd.) DC. Introduced TALA2

  rock dandelion · Asteraceae 34 counties