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 3,101–3,150 of 3,901.

• 
  Sagina decumbens (Elliott) Torr. & A. Gray ssp. decumbens Native SADED

  trailing pearlwort · Caryophyllaceae 4 counties
• 
  Sagina japonica (Sw.) Ohwi Introduced SAJA2

  Japanese pearlwort · Caryophyllaceae 4 counties
• 
  Sagina procumbens L. Introduced SAPR

  birdeye pearlwort · Caryophyllaceae 25 counties
• 
  Sagittaria australis (J.G. Sm.) Small Native SAAU2

  longbeak arrowhead · Alismataceae 13 counties
• 
  Sagittaria calycina Engelm. Native SACA21

  hooded arrowhead · Alismataceae 2 counties
• 
  Sagittaria calycina Engelm. var. spongiosa Native SACAS

  hooded arrowhead · Alismataceae 2 counties
• 
  Sagittaria cuneata Sheldon Native SACU

  arumleaf arrowhead · Alismataceae 1 county
• 
  Sagittaria filiformis J.G. Sm. Native SAFI2

  threadleaf arrowhead · Alismataceae 1 county
• 
  Sagittaria graminea Michx. Native SAGR

  grassy arrowhead · Alismataceae 22 counties
• 
  Sagittaria graminea Michx. var. graminea Native SAGRG

  grassy arrowhead · Alismataceae 22 counties
• 
  Sagittaria latifolia Willd. Native SALA2

  broadleaf arrowhead · Alismataceae 61 counties
• 
  Sagittaria rigida Pursh Native SARI

  sessilefruit arrowhead · Alismataceae 42 counties
• 
  Sagittaria subulata (L.) Buchenau Native SASU

  awl-leaf arrowhead · Alismataceae 3 counties
• 
  Salix alba L. Introduced SAAL2

  white willow · Salicaceae 31 counties
• 
  Salix amygdaloides Andersson Native SAAM2

  peachleaf willow · Salicaceae 10 counties
• 
  Salix atrocinerea Brot. Introduced SAAT2

  large gray willow · Salicaceae 1 county
• 
  Salix bebbiana Sarg. Native SABE2

  Bebb willow · Salicaceae 43 counties
• 
  Salix candida Flueggé ex Willd. Native SACA4

  sageleaf willow · Salicaceae 4 counties
• 
  Salix caprea L. Introduced SACA22

  goat willow · Salicaceae 11 counties
• 
  Salix caroliniana Michx. Native SACA5

  coastal plain willow · Salicaceae 13 counties
• 
  Salix cinerea L. Introduced SACI

  large gray willow · Salicaceae 5 counties
• 
  Salix discolor Muhl. Native SADI

  pussy willow · Salicaceae 44 counties
• 
  Salix eriocephala Michx. Native SAER

  Missouri River willow · Salicaceae 66 counties
• ⚘
  Salix fragilis L. Introduced SAFR

  crack willow · Salicaceae 44 counties
• 
  Salix humilis Marshall Native SAHU2

  prairie willow · Salicaceae 61 counties
• 
  Salix humilis Marshall var. humilis Native SAHUH

  prairie willow · Salicaceae 61 counties
• 
  Salix humilis Marshall var. tristis (Aiton) Griggs Native SAHUT

  prairie willow · Salicaceae 26 counties
• 
  Salix interior Rowlee Native SAIN3

  sandbar willow · Salicaceae 31 counties
• 
  Salix lucida Muhl. Native SALU

  shining willow · Salicaceae 34 counties
• 
  Salix lucida Muhl. ssp. lucida Native SALUL2

  shining willow · Salicaceae 34 counties
• 
  Salix myricoides Muhl. Native SAMY2

  bayberry willow · Salicaceae 16 counties
• 
  Salix myricoides Muhl. var. albovestita (C.R. Ball) Dorn Native SAMYA

  bayberry willow · Salicaceae 6 counties
• 
  Salix myricoides Muhl. var. myricoides Native SAMYM

  bayberry willow · Salicaceae 11 counties
• 
  Salix nigra Marshall Native SANI

  black willow · Salicaceae 64 counties
• 
  Salix pedicellaris Pursh Native SAPE2

  bog willow · Salicaceae 1 county
• 
  Salix pentandra L. Introduced SAPE4

  laurel willow · Salicaceae 14 counties
• 
  Salix petiolaris Sm. Native SAPE5

  meadow willow · Salicaceae 18 counties
• 
  Salix purpurea L. Introduced SAPU2

  purpleosier willow · Salicaceae 23 counties
• 
  Salix sericea Marshall Native SASE

  silky willow · Salicaceae 65 counties
• 
  Salix serissima (L.H. Bailey) Fernald Native SASE2

  autumn willow · Salicaceae 9 counties
• 
  Salix viminalis L. Introduced SAVI2

  basket willow · Salicaceae 1 county
• ⚘
  Salix ×pendulina Wender. [babylonica × euxina] Introduced SAPE12

  Wisconsin weeping willow · Salicaceae 1 county
• ⚘
  Salix ×rubens Schrank (pro sp.) [alba × fragilis] Introduced SARU3

  hybrid crack willow · Salicaceae 10 counties
• 
  Salsola kali L. Introduced SAKA

  Russian thistle · Chenopodiaceae 5 counties
• 
  Salsola kali L. ssp. kali Introduced SAKAK

  Russian thistle · Chenopodiaceae 4 counties
• 
  Salsola tragus L. Introduced SATR12

  prickly Russian thistle · Chenopodiaceae 20 counties
• 
  Salvia lyrata L. Native SALY2

  lyreleaf sage · Lamiaceae 23 counties
• 
  Salvia officinalis L. Introduced SAOF2

  kitchen sage · Lamiaceae 4 counties
• 
  Salvia pratensis L. Introduced SAPR2

  introduced sage · Lamiaceae 4 counties
• 
  Salvia reflexa Hornem. Native SARE3

  lanceleaf sage · Lamiaceae 6 counties