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 2,051–2,100 of 3,901.

• 
  Lindernia dubia (L.) Pennell var. dubia Native LIDUD

  yellowseed false pimpernel · Scrophulariaceae 59 counties
• 
  Linnaea borealis L. Native LIBO3

  twinflower · Caprifoliaceae 11 counties
• 
  Linnaea borealis L. ssp. americana (Forbes) Hultén ex R.T. Clausen Native LIBOA

  twinflower · Caprifoliaceae 11 counties
• 
  Linum bienne Mill. Introduced LIBI5

  pale flax · Linaceae 6 counties
• 
  Linum catharticum L. Introduced LICA9

  fairy flax · Linaceae 1 county
• 
  Linum intercursum E.P. Bicknell Native LIIN

  sandplain flax · Linaceae 5 counties
• 
  Linum medium (Planch.) Britton Native LIME2

  stiff yellow flax · Linaceae 16 counties
• 
  Linum medium (Planch.) Britton var. medium Native LIMEM

  stiff yellow flax · Linaceae 1 county
• 
  Linum medium (Planch.) Britton var. texanum (Planch.) Fernald Native LIMET

  stiff yellow flax · Linaceae 16 counties
• 
  Linum perenne L. Introduced LIPE2

  blue flax · Linaceae 6 counties
• 
  Linum striatum Walter Native LIST

  ridged yellow flax · Linaceae 42 counties
• 
  Linum sulcatum Riddell Native LISU4

  grooved flax · Linaceae 6 counties
• 
  Linum sulcatum Riddell var. sulcatum Native LISUS

  grooved flax · Linaceae 6 counties
• 
  Linum usitatissimum L. Introduced LIUS

  common flax · Linaceae 23 counties
• 
  Linum virginianum L. Native LIVI

  woodland flax · Linaceae 50 counties
• 
  Liparis liliifolia (L.) Rich. ex Ker Gawl. Native LILI3

  brown widelip orchid · Orchidaceae 42 counties
• 
  Liparis loeselii (L.) Rich. Native LILO

  yellow widelip orchid · Orchidaceae 26 counties
• 
  Lipocarpha micrantha (Vahl) G. Tucker Native LIMI12

  smallflower halfchaff sedge · Cyperaceae 2 counties
• 
  Liquidambar styraciflua L. Native LIST2

  sweetgum · Hamamelidaceae 8 counties
• 
  Liriodendron tulipifera L. Native LITU

  tuliptree · Magnoliaceae 62 counties
• 
  Listera australis Lindl. Native LIAU3

  southern twayblade · Orchidaceae 2 counties
• 
  Listera cordata (L.) R. Br. Native LICO6

  heartleaf twayblade · Orchidaceae 6 counties
• 
  Listera cordata (L.) R. Br. var. cordata Native LICOC2

  heartleaf twayblade · Orchidaceae 6 counties
• 
  Listera smallii Wiegand Native LISM

  kidneyleaf twayblade · Orchidaceae 5 counties
• 
  Lithospermum canescens (Michx.) Lehm. Native LICA12

  hoary puccoon · Boraginaceae 10 counties
• 
  Lithospermum caroliniense (Walter ex J.F. Gmel.) MacMill. Native LICA13

  Carolina puccoon · Boraginaceae 2 counties
• 
  Lithospermum caroliniense (Walter ex J.F. Gmel.) MacMill. var. croceum (Fernald) Cronquist Native LICAC9

  Carolina puccoon · Boraginaceae 2 counties
• 
  Lithospermum latifolium Michx. Native LILA2

  American stoneseed · Boraginaceae 7 counties
• 
  Lithospermum officinale L. Introduced LIOF

  European stoneseed · Boraginaceae 1 county
• 
  Lobelia cardinalis L. Native LOCA2

  cardinalflower · Campanulaceae 64 counties
• 
  Lobelia chinensis Lour. Introduced LOCH4

  Chinese lobelia · Campanulaceae 2 counties
• 
  Lobelia dortmanna L. Native LODO

  Dortmann's cardinalflower · Campanulaceae 6 counties
• 
  Lobelia erinus L. Introduced LOER

  edging lobelia · Campanulaceae 2 counties
• 
  Lobelia inflata L. Native LOIN

  Indian-tobacco · Campanulaceae 67 counties
• 
  Lobelia kalmii L. Native LOKA

  Ontario lobelia · Campanulaceae 6 counties
• 
  Lobelia nuttallii Schult. Native LONU

  Nuttall's lobelia · Campanulaceae 2 counties
• 
  Lobelia puberula Michx. Native LOPU

  downy lobelia · Campanulaceae 4 counties
• 
  Lobelia puberula Michx. var. puberula Native LOPUP2

  downy lobelia · Campanulaceae 4 counties
• 
  Lobelia siphilitica L. Native LOSI

  great blue lobelia · Campanulaceae 61 counties
• 
  Lobelia siphilitica L. var. siphilitica Native LOSIS2

  great blue lobelia · Campanulaceae 61 counties
• 
  Lobelia spicata Lam. Native LOSP

  palespike lobelia · Campanulaceae 47 counties
• 
  Lobelia spicata Lam. var. campanulata McVaugh Native LOSPC

  palespike lobelia · Campanulaceae 16 counties
• 
  Lobelia spicata Lam. var. leptostachys (A. DC.) Mack. & Bush Native LOSPL

  palespike lobelia · Campanulaceae 2 counties
• 
  Lobelia spicata Lam. var. scaposa McVaugh Native LOSPS

  palespike lobelia · Campanulaceae 9 counties
• 
  Lobelia spicata Lam. var. spicata Native LOSPS4

  palespike lobelia · Campanulaceae 46 counties
• 
  Lobularia maritima (L.) Desv. Introduced LOMA

  sweet alyssum · Brassicaceae 8 counties
• 
  Logfia minima (Sm.) Dumort. Introduced LOMI4

  little cottonrose · Asteraceae 1 county
• 
  Lolium perenne L. Introduced LOPE

  perennial ryegrass · Poaceae 48 counties
• 
  Lolium perenne L. ssp. multiflorum (Lam.) Husnot Introduced LOPEM2

  Italian ryegrass · Poaceae 32 counties
• 
  Lolium temulentum L. Introduced LOTE2

  Darnel ryegrass · Poaceae 6 counties