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 3,201–3,250 of 3,901.

• 
  Scirpus ancistrochaetus Schuyler Native SCAN5

  barbedbristle bulrush · Cyperaceae 11 counties
• 
  Scirpus atrocinctus Fernald Native SCAT4

  blackgirdle bulrush · Cyperaceae 18 counties
• 
  Scirpus atrovirens Willd. Native SCAT2

  green bulrush · Cyperaceae 57 counties
• 
  Scirpus cyperinus (L.) Kunth Native SCCY

  woolgrass · Cyperaceae 64 counties
• 
  Scirpus expansus Fernald Native SCEX

  woodland bulrush · Cyperaceae 23 counties
• 
  Scirpus georgianus Harper Native SCGE2

  Georgia bulrush · Cyperaceae 31 counties
• 
  Scirpus hattorianus Makino Native SCHA3

  mosquito bulrush · Cyperaceae 63 counties
• 
  Scirpus microcarpus J. Presl & C. Presl Native SCMI2

  panicled bulrush · Cyperaceae 22 counties
• 
  Scirpus pallidus (Britton) Fernald Native SCPA8

  cloaked bulrush · Cyperaceae 2 counties
• 
  Scirpus pedicellatus Fernald Native SCPE3

  stalked bulrush · Cyperaceae 5 counties
• 
  Scirpus pendulus Muhl. Native SCPE4

  rufous bulrush · Cyperaceae 32 counties
• 
  Scirpus polyphyllus Vahl Native SCPO2

  leafy bulrush · Cyperaceae 64 counties
• 
  Scleranthus annuus L. Introduced SCAN2

  German knotgrass · Caryophyllaceae 23 counties
• 
  Scleria minor W. Stone Native SCMI4

  slender nutrush · Cyperaceae 2 counties
• 
  Scleria muehlenbergii Steud. Native SCMU8

  Muehlenberg's nutrush · Cyperaceae 7 counties
• 
  Scleria pauciflora Muhl. ex Willd. Native SCPA5

  fewflower nutrush · Cyperaceae 9 counties
• 
  Scleria pauciflora Muhl. ex Willd. var. pauciflora Native SCPAP2

  fewflower nutrush · Cyperaceae 9 counties
• 
  Scleria triglomerata Michx. Native SCTR

  whip nutrush · Cyperaceae 14 counties
• 
  Scleria verticillata Muhl. ex Willd. Native SCVE2

  low nutrush · Cyperaceae 5 counties
• 
  Sclerochloa dura (L.) P. Beauv. Introduced SCDU2

  common hardgrass · Poaceae 1 county
• 
  Scolymus hispanicus L. Introduced SCHI

  common goldenthistle · Asteraceae 1 county
• 
  Scorpiurus muricatus L. Introduced SCMU3

  prickly scorpion's-tail · Fabaceae 1 county
• 
  Scrophularia lanceolata Pursh Native SCLA

  lanceleaf figwort · Scrophulariaceae 53 counties
• 
  Scrophularia marilandica L. Native SCMA2

  carpenter's square · Scrophulariaceae 55 counties
• 
  Scrophularia umbrosa Dumort. Introduced SCUM

  water figwort · Scrophulariaceae 1 county
• 
  Scutellaria elliptica Muhl. ex Spreng. Native SCEL

  hairy skullcap · Lamiaceae 28 counties
• 
  Scutellaria elliptica Muhl. ex Spreng. var. elliptica Native SCELE

  hairy skullcap · Lamiaceae 27 counties
• 
  Scutellaria elliptica Muhl. ex Spreng. var. hirsuta (Short & Peter) Fernald Native SCELH

  hairy skullcap · Lamiaceae 3 counties
• 
  Scutellaria galericulata L. Native SCGA

  marsh skullcap · Lamiaceae 32 counties
• 
  Scutellaria incana Biehler Native SCIN

  hoary skullcap · Lamiaceae 35 counties
• 
  Scutellaria incana Biehler var. incana Native SCINI2

  hoary skullcap · Lamiaceae 35 counties
• 
  Scutellaria integrifolia L. Native SCIN2

  helmet flower · Lamiaceae 28 counties
• 
  Scutellaria lateriflora L. Native SCLA2

  blue skullcap · Lamiaceae 65 counties
• 
  Scutellaria lateriflora L. var. lateriflora Native SCLAL2

  blue skullcap · Lamiaceae 65 counties
• 
  Scutellaria nervosa Pursh Native SCNE2

  veiny skullcap · Lamiaceae 28 counties
• 
  Scutellaria parvula Michx. Native SCPA7

  small skullcap · Lamiaceae 21 counties
• 
  Scutellaria parvula Michx. var. missouriensis (Torr.) Goodman & C.A. Lawson Native SCPAM

  Leonard's skullcap · Lamiaceae 21 counties
• 
  Scutellaria saxatilis Riddell Native SCSA5

  smooth rock skullcap · Lamiaceae 8 counties
• 
  Scutellaria serrata Andrews Native SCSE5

  showy skullcap · Lamiaceae 5 counties
• 
  Secale cereale L. Introduced SECE

  cereal rye · Poaceae 23 counties
• 
  Securigera varia (L.) Lassen Introduced SEVA4

  crownvetch · Fabaceae 30 counties
• 
  Sedum acre L. Introduced SEAC

  goldmoss stonecrop · Crassulaceae 20 counties
• 
  Sedum album L. Introduced SEAL

  white stonecrop · Crassulaceae 5 counties
• 
  Sedum sarmentosum Bunge Introduced SESA

  stringy stonecrop · Crassulaceae 29 counties
• 
  Sedum ternatum Michx. Native SETE3

  woodland stonecrop · Crassulaceae 43 counties
• 
  Selaginella apoda (L.) Spring Native SEAP

  meadow spikemoss · Selaginellaceae 40 counties
• 
  Selaginella rupestris (L.) Spring Native SERU

  northern selaginella · Selaginellaceae 25 counties
• 
  Senecio erucifolius L. Introduced SEER5

  hoary ragwort · Asteraceae 1 county
• 
  Senecio jacobaea L. Introduced SEJA

  stinking willie · Asteraceae 2 counties
• 
  Senecio sylvaticus L. Introduced SESY

  woodland ragwort · Asteraceae 1 county