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 1,951–2,000 of 3,901.

• 
  Laportea canadensis (L.) Weddell Native LACA3

  Canadian woodnettle · Urticaceae 65 counties
• 
  Lappula marginata (M. Bieb.) Guerke Introduced LAMA9

  margined stickseed · Boraginaceae 1 county
• 
  Lappula occidentalis (S. Watson) Greene Native LAOC3

  flatspine stickseed · Boraginaceae 1 county
• 
  Lappula occidentalis (S. Watson) Greene var. occidentalis Native LAOCO

  flatspine stickseed · Boraginaceae 1 county
• 
  Lappula squarrosa (Retz.) Dumort. Introduced LASQ

  European stickseed · Boraginaceae 14 counties
• 
  Lapsana communis L. Introduced LACO3

  common nipplewort · Asteraceae 25 counties
• 
  Larix decidua Mill. Introduced LADE2

  European larch · Pinaceae 13 counties
• 
  Larix kaempferi (Lam.) Carrière Introduced LAKA2

  Japanese larch · Pinaceae 4 counties
• 
  Larix laricina (Du Roi) K. Koch Native LALA

  tamarack · Pinaceae 30 counties
• 
  Lathyrus aphaca L. Introduced LAAP2

  yellow pea · Fabaceae 1 county
• 
  Lathyrus japonicus Willd. Native LAJA

  beach pea · Fabaceae 2 counties
• 
  Lathyrus japonicus Willd. var. maritimus (L.) Kartesz & Gandhi Native LAJAM

  beach pea · Fabaceae 2 counties
• 
  Lathyrus latifolius L. Introduced LALA4

  perennial pea · Fabaceae 41 counties
• 
  Lathyrus ochroleucus Hook. Native LAOC2

  cream pea · Fabaceae 10 counties
• 
  Lathyrus palustris L. Native LAPA4

  marsh pea · Fabaceae 20 counties
• 
  Lathyrus tuberosus L. Introduced LATU

  tuberous sweetpea · Fabaceae 5 counties
• 
  Lathyrus venosus Muhl. ex Willd. Native LAVE

  veiny pea · Fabaceae 16 counties
• 
  Lechea intermedia Leggett ex Britton Native LEIN

  largepod pinweed · Cistaceae 27 counties
• 
  Lechea intermedia Leggett ex Britton var. intermedia Native LEINI2

  largepod pinweed · Cistaceae 27 counties
• 
  Lechea minor L. Native LEMI

  thymeleaf pinweed · Cistaceae 8 counties
• 
  Lechea mucronata Raf. Native LEMU3

  hairy pinweed · Cistaceae 18 counties
• 
  Lechea pulchella Raf. Native LEPU4

  Leggett's pinweed · Cistaceae 32 counties
• 
  Lechea pulchella Raf. var. pulchella Native LEPUP2

  Leggett's pinweed · Cistaceae 32 counties
• 
  Lechea racemulosa Michx. Native LERA

  Illinois pinweed · Cistaceae 41 counties
• 
  Ledum groenlandicum Oeder Native LEGR

  bog Labrador tea · Ericaceae 7 counties
• 
  Leersia oryzoides (L.) Sw. Native LEOR

  rice cutgrass · Poaceae 65 counties
• 
  Leersia virginica Willd. Native LEVI2

  whitegrass · Poaceae 63 counties
• 
  Legousia speculum-veneris (L.) Fisch. ex A. DC. Introduced LESP2

  European Venus' looking glass · Campanulaceae 2 counties
• 
  Leiophyllum buxifolium (Bergius) Elliott Native LEBU

  sandmyrtle · Ericaceae 1 county
• 
  Lemna minor L. Native LEMI3

  common duckweed · Lemnaceae 50 counties
• 
  Lemna obscura (Austin) Daubs Native LEOB2

  little duckweed · Lemnaceae 1 county
• 
  Lemna perpusilla Torr. Native LEPE

  minute duckweed · Lemnaceae 10 counties
• 
  Lemna trisulca L. Native LETR

  star duckweed · Lemnaceae 18 counties
• 
  Lemna turionifera Landolt Native LETU2

  turion duckweed · Lemnaceae 8 counties
• 
  Lemna valdiviana Phil. Native LEVA

  valdivia duckweed · Lemnaceae 3 counties
• 
  Lens culinaris Medik. Introduced LECU2

  lentil · Fabaceae 5 counties
• 
  Leontodon autumnalis L. Introduced LEAU2

  fall dandelion · Asteraceae 10 counties
• 
  Leontodon taraxacoides (Vill.) Mérat Introduced LETA

  lesser hawkbit · Asteraceae 7 counties
• 
  Leontodon taraxacoides (Vill.) Mérat ssp. taraxacoides Introduced LETAT

  lesser hawkbit · Asteraceae 7 counties
• 
  Leonurus cardiaca L. Introduced LECA2

  common motherwort · Lamiaceae 62 counties
• 
  Leonurus cardiaca L. ssp. cardiaca Introduced LECAC7

  common motherwort · Lamiaceae 62 counties
• 
  Leonurus sibiricus L. Introduced LESI

  honeyweed · Lamiaceae 2 counties
• 
  Lepidium campestre (L.) W.T. Aiton Introduced LECA5

  field pepperweed · Brassicaceae 66 counties
• 
  Lepidium graminifolium L. Introduced LEGR5

  grassleaf pepperweed · Brassicaceae 1 county
• 
  Lepidium heterophyllum Benth. Introduced LEHE2

  purpleanther field pepperweed · Brassicaceae 1 county
• 
  Lepidium perfoliatum L. Introduced LEPE2

  clasping pepperweed · Brassicaceae 3 counties
• 
  Lepidium ruderale L. Introduced LERU

  roadside pepperweed · Brassicaceae 1 county
• 
  Lepidium sativum L. Introduced LESA2

  gardencress pepperweed · Brassicaceae 2 counties
• 
  Lepidium virginicum L. Native LEVI3

  Virginia pepperweed · Brassicaceae 58 counties
• 
  Lepidium virginicum L. var. virginicum Native LEVIV2

  Virginia pepperweed · Brassicaceae 58 counties