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 601–650 of 1,109 (introduced).

• 
  Lychnis chalcedonica L. Introduced LYCH3

  maltesecross · Caryophyllaceae 8 counties
• 
  Lychnis coronaria (L.) Desr. Introduced LYCO

  rose campion · Caryophyllaceae 16 counties
• 
  Lychnis flos-cuculi L. Introduced LYFL3

  ragged robin · Caryophyllaceae 6 counties
• 
  Lychnis fulgens Fisch. ex Sims Introduced LYFU2

  brilliant campion · Caryophyllaceae 1 county
• 
  Lycium barbarum L. Introduced LYBA4

  matrimony vine · Solanaceae 27 counties
• 
  Lycium chinense Mill. Introduced LYCH

  Chinese desert-thorn · Solanaceae 3 counties
• 
  Lycopus europaeus L. Introduced LYEU

  gypsywort · Lamiaceae 6 counties
• 
  Lysimachia clethroides Duby Introduced LYCL2

  gooseneck yellow loosestrife · Primulaceae 8 counties
• 
  Lysimachia nummularia L. Introduced LYNU

  creeping jenny · Primulaceae 56 counties
• 
  Lysimachia punctata L. Introduced LYPU2

  large yellow loosestrife · Primulaceae 8 counties
• 
  Lysimachia vulgaris L. Introduced LYVU

  garden yellow loosestrife · Primulaceae 13 counties
• 
  Lythrum hyssopifolium L. Introduced LYHY3

  hyssop loosestrife · Lythraceae 2 counties
• 
  Lythrum salicaria L. Introduced LYSA2

  purple loosestrife · Lythraceae 36 counties
• 
  Lythrum virgatum L. Introduced LYVI3

  European wand loosestrife · Lythraceae 1 county
• 
  Macleaya cordata (Willd.) R. Br. Introduced MACO10

  plume poppy · Papaveraceae 9 counties
• 
  Malus baccata (L.) Borkh. Introduced MABA

  Siberian crab apple · Rosaceae 6 counties
• ⚘
  Malus floribunda Siebold ex Van Houtte Introduced MAFL80

  Japanese flowering crab apple · Rosaceae 3 counties
• 
  Malus prunifolia (Willd.) Borkh. Introduced MAPR

  plumleaf crab apple · Rosaceae 3 counties
• 
  Malus pumila Mill. Introduced MAPU

  paradise apple · Rosaceae 47 counties
• 
  Malus toringo (Siebold) Siebold ex de Vriese Introduced MATO6

  toringo crab · Rosaceae 1 county
• 
  Malva alcea L. Introduced MAAL

  vervain mallow · Malvaceae 2 counties
• 
  Malva moschata L. Introduced MAMO2

  musk mallow · Malvaceae 47 counties
• 
  Malva neglecta Wallr. Introduced MANE

  common mallow · Malvaceae 55 counties
• 
  Malva pusilla Sm. Introduced MAPU5

  low mallow · Malvaceae 3 counties
• 
  Malva sylvestris L. Introduced MASY

  high mallow · Malvaceae 17 counties
• 
  Malva verticillata L. Introduced MAVE

  cluster mallow · Malvaceae 3 counties
• 
  Malvastrum coromandelianum (L.) Garcke Introduced MACO6

  threelobe false mallow · Malvaceae 2 counties
• 
  Marrubium vulgare L. Introduced MAVU

  horehound · Lamiaceae 21 counties
• 
  Marsilea quadrifolia L. Introduced MAQU

  European waterclover · Marsileaceae 3 counties
• 
  Matricaria discoidea DC. Introduced MADI6

  disc mayweed · Asteraceae 46 counties
• 
  Matricaria recutita L. Introduced MARE6

  German chamomile · Asteraceae 9 counties
• 
  Mazus miquelii Makino Introduced MAMI4

  Miquel's mazus · Scrophulariaceae 6 counties
• 
  Mazus pumilus (Burm. f.) Steenis Introduced MAPU7

  Japanese mazus · Scrophulariaceae 6 counties
• 
  Medicago arabica (L.) Huds. Introduced MEAR

  spotted medick · Fabaceae 1 county
• 
  Medicago lupulina L. Introduced MELU

  black medick · Fabaceae 67 counties
• 
  Medicago polymorpha L. Introduced MEPO3

  burclover · Fabaceae 3 counties
• 
  Medicago sativa L. Introduced MESA

  alfalfa · Fabaceae 63 counties
• 
  Medicago sativa L. ssp. falcata (L.) Arcang. Introduced MESAF

  yellow alfalfa · Fabaceae 2 counties
• 
  Medicago sativa L. ssp. sativa Introduced MESAS

  alfalfa · Fabaceae 1 county
• 
  Melilotus altissimus Thuill. Introduced MEAL3

  tall yellow sweetclover · Fabaceae 3 counties
• 
  Melilotus officinalis (L.) Lam. Introduced MEOF

  sweetclover · Fabaceae 67 counties
• 
  Melilotus sulcatus Desf. Introduced MESU2

  Mediterranean sweetclover · Fabaceae 1 county
• 
  Melissa officinalis L. Introduced MEOF2

  common balm · Lamiaceae 22 counties
• 
  Mentha aquatica L. Introduced MEAQ

  water mint · Lamiaceae 3 counties
• 
  Mentha pulegium L. Introduced MEPU

  pennyroyal · Lamiaceae 2 counties
• 
  Mentha spicata L. Introduced MESP3

  spearmint · Lamiaceae 56 counties
• ⚘
  Mentha ×gracilis Sole (pro sp.) [arvensis × spicata] Introduced MEGR2

  gingermint · Lamiaceae 31 counties
• ⚘
  Mentha ×rotundifolia (L.) Huds. (pro sp.) [longifolia × suaveolens] Introduced MERO2

  Lamiaceae 13 counties
• ⚘
  Mentha ×verticillata L., nom. inq. [aquatica × arvensis] Introduced MEVE2

  mint · Lamiaceae 5 counties
• 
  Mentha ×villosa Huds. (pro sp.) [spicata × suaveolens] Introduced MEVI6

  mint · Lamiaceae 30 counties