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 3,151–3,200 of 3,901.

• 
  Salvia sclarea L. Introduced SASC2

  Europe sage · Lamiaceae 3 counties
• 
  Salvia verbenaca L. Introduced SAVE12

  wild clary · Lamiaceae 1 county
• 
  Salvia verticillata L. Introduced SAVE5

  lilac sage · Lamiaceae 7 counties
• ⚘
  Salvia ×sylvestris L. (pro sp.) [nemorosa × pratensis] Introduced SASY

  woodland sage · Lamiaceae 3 counties
• 
  Sambucus nigra L. Both SANI4

  black elderberry · Caprifoliaceae 67 counties
• 
  Sambucus nigra L. ssp. canadensis (L.) R. Bolli Native SANIC4

  American black elderberry · Caprifoliaceae 67 counties
• 
  Sambucus racemosa L. Native SARA2

  red elderberry · Caprifoliaceae 58 counties
• 
  Sambucus racemosa L. var. racemosa Native SARAR3

  red elderberry · Caprifoliaceae 58 counties
• 
  Samolus valerandi L. Both SAVA3

  seaside brookweed · Primulaceae 10 counties
• 
  Samolus valerandi L. ssp. parviflorus (Raf.) Hultén Native SAVAP

  seaside brookweed · Primulaceae 10 counties
• 
  Sanguinaria canadensis L. Native SACA13

  bloodroot · Papaveraceae 61 counties
• 
  Sanguisorba canadensis L. Native SACA14

  Canadian burnet · Rosaceae 35 counties
• 
  Sanguisorba minor Scop. Introduced SAMI3

  small burnet · Rosaceae 14 counties
• 
  Sanguisorba minor Scop. ssp. balearica (Bourg. ex Nyman) M. Garm. & C. Navarro Introduced SAMIB2

  small burnet · Rosaceae 14 counties
• 
  Sanicula canadensis L. Native SACA15

  Canadian blacksnakeroot · Apiaceae 54 counties
• 
  Sanicula canadensis L. var. canadensis Native SACAC2

  Canadian blacksnakeroot · Apiaceae 1 county
• 
  Sanicula marilandica L. Native SAMA2

  Maryland sanicle · Apiaceae 62 counties
• 
  Sanicula odorata (Raf.) K.M. Pryer & L.R. Phillippe Native SAOD

  clustered blacksnakeroot · Apiaceae 48 counties
• 
  Sanicula trifoliata E.P. Bicknell Native SATR4

  largefruit blacksnakeroot · Apiaceae 31 counties
• 
  Saponaria officinalis L. Introduced SAOF4

  bouncingbet · Caryophyllaceae 66 counties
• 
  Sarracenia purpurea L. Native SAPU4

  purple pitcherplant · Sarraceniaceae 23 counties
• 
  Sarracenia purpurea L. ssp. purpurea var. purpurea Native SAPUP6

  northern purple pitcherplant · Sarraceniaceae 23 counties
• 
  Sassafras albidum (Nutt.) Nees Native SAAL5

  sassafras · Lauraceae 67 counties
• 
  Satureja hortensis L. Introduced SAHO3

  summer savory · Lamiaceae 9 counties
• 
  Saururus cernuus L. Native SACE

  lizard's tail · Saururaceae 26 counties
• 
  Saxifraga micranthidifolia (Haw.) Steud. Native SAMI6

  lettuceleaf saxifrage · Saxifragaceae 7 counties
• 
  Saxifraga pensylvanica L. Native SAPE8

  eastern swamp saxifrage · Saxifragaceae 54 counties
• 
  Saxifraga virginiensis Michx. Native SAVI5

  early saxifrage · Saxifragaceae 62 counties
• 
  Saxifraga virginiensis Michx. var. virginiensis Native SAVIV

  early saxifrage · Saxifragaceae 62 counties
• 
  Scandix pecten-veneris L. Introduced SCPE

  shepherdsneedle · Apiaceae 1 county
• 
  Schedonorus arundinaceus (Schreb.) Dumort., nom. cons. Introduced SCAR7

  tall fescue · Poaceae 1 county
• 
  Schedonorus pratensis (Huds.) P. Beauv. Introduced SCPR4

  meadow fescue · Poaceae 65 counties
• 
  Scheuchzeria palustris L. Native SCPA2

  rannoch-rush · Scheuchzeriaceae 15 counties
• 
  Scheuchzeria palustris L. ssp. americana (Fernald) Hultén Native SCPAA3

  rannoch-rush · Scheuchzeriaceae 15 counties
• 
  Schizachne purpurascens (Torr.) Swallen Native SCPU

  false melic · Poaceae 22 counties
• 
  Schizachyrium littorale (Nash) E.P. Bicknell Native SCLI11

  shore little bluestem · Poaceae 1 county
• 
  Schizachyrium scoparium (Michx.) Nash Native SCSC

  little bluestem · Poaceae 51 counties
• 
  Schizachyrium scoparium (Michx.) Nash var. scoparium Native SCSCS

  little bluestem · Poaceae 51 counties
• 
  Schoenoplectiella purshiana (Fernald) Lye Native SCPU14

  weakstalk bulrush · Cyperaceae 28 counties
• 
  Schoenoplectiella smithii (A. Gray) Hayas. Native SCSM3

  Smith's bulrush · Cyperaceae 4 counties
• 
  Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve Native SCAC3

  hardstem bulrush · Cyperaceae 8 counties
• 
  Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve var. acutus Native SCACA

  hardstem bulrush · Cyperaceae 8 counties
• 
  Schoenoplectus americanus (Pers.) Volkart ex Schinz & R. Keller Native SCAM6

  chairmaker's bulrush · Cyperaceae 1 county
• 
  Schoenoplectus heterochaetus (Chase) Soják Native SCHE5

  slender bulrush · Cyperaceae 1 county
• 
  Schoenoplectus pungens (Vahl) Palla Native SCPU10

  common threesquare · Cyperaceae 37 counties
• 
  Schoenoplectus pungens (Vahl) Palla var. pungens Native SCPUP5

  common threesquare · Cyperaceae 36 counties
• 
  Schoenoplectus subterminalis (Torr.) Soják Native SCSU10

  swaying bulrush · Cyperaceae 10 counties
• 
  Schoenoplectus tabernaemontani (C.C. Gmel.) Palla Native SCTA2

  softstem bulrush · Cyperaceae 61 counties
• 
  Schoenoplectus torreyi (Olney) Palla Native SCTO3

  Torrey's bulrush · Cyperaceae 12 counties
• 
  Scilla siberica Andrews Introduced SCSI2

  Siberian squill · Liliaceae 3 counties