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 2,251–2,300 of 3,901.

• 
  Mentha ×villosa Huds. (pro sp.) [spicata × suaveolens] Introduced MEVI6

  mint · Lamiaceae 30 counties
• 
  Menyanthes trifoliata L. Native METR3

  buckbean · Menyanthaceae 19 counties
• 
  Menziesia pilosa (Michx. ex Lam.) Juss. ex Pers. Native MEPI2

  minniebush · Ericaceae 7 counties
• 
  Mercurialis annua L. Introduced MEAN

  annual mercury · Euphorbiaceae 2 counties
• 
  Merremia dissecta (Jacq.) Hallier f. Native MEDI2

  noyau vine · Convolvulaceae 1 county
• 
  Mertensia virginica (L.) Pers. ex Link Native MEVI3

  Virginia bluebells · Boraginaceae 45 counties
• 
  Mesembryanthemum crystallinum L. Introduced MECR3

  common iceplant · Aizoaceae 1 county
• 
  Micranthemum micranthemoides (Nutt.) Wettst. Native MIMI6

  Nuttall's mudflower · Scrophulariaceae 2 counties
• 
  Microstegium vimineum (Trin.) A. Camus Introduced MIVI

  Nepalese browntop · Poaceae 22 counties
• 
  Microthlaspi perfoliatum (L.) F.K. Mey. Introduced MIPE8

  claspleaf pennycress · Brassicaceae 10 counties
• 
  Mikania scandens (L.) Willd. Native MISC

  climbing hempvine · Asteraceae 15 counties
• 
  Milium effusum L. Native MIEF

  American milletgrass · Poaceae 26 counties
• 
  Milium effusum L. var. cisatlanticum Fernald Native MIEFC

  American milletgrass · Poaceae 26 counties
• 
  Mimosa nuttallii (DC. ex Britton & Rose) B.L. Turner Native MINU6

  Nuttall's sensitive-briar · Fabaceae 1 county
• 
  Mimulus alatus Aiton Native MIAL2

  sharpwing monkeyflower · Scrophulariaceae 32 counties
• 
  Mimulus guttatus DC. Native MIGU

  seep monkeyflower · Scrophulariaceae 1 county
• 
  Mimulus moschatus Douglas ex Lindl. Native MIMO3

  muskflower · Scrophulariaceae 18 counties
• 
  Mimulus moschatus Douglas ex Lindl. var. moschatus Native MIMOM2

  muskflower · Scrophulariaceae 18 counties
• 
  Mimulus ringens L. Native MIRI

  Allegheny monkeyflower · Scrophulariaceae 67 counties
• 
  Mimulus ringens L. var. ringens Native MIRIR

  Allegheny monkeyflower · Scrophulariaceae 67 counties
• 
  Minuartia glabra (Michx.) Mattf. Native MIGL5

  Appalachian stitchwort · Caryophyllaceae 5 counties
• 
  Minuartia michauxii (Fenzl) Farw. Native MIMI2

  Michaux's stitchwort · Caryophyllaceae 18 counties
• 
  Minuartia michauxii (Fenzl) Farw. var. michauxii Native MIMIM

  Michaux's stitchwort · Caryophyllaceae 17 counties
• 
  Minuartia patula (Michx.) Mattf. Native MIPA6

  pitcher's stitchwort · Caryophyllaceae 3 counties
• 
  Mirabilis albida (Walter) Heimerl Native MIAL4

  white four o'clock · Nyctaginaceae 1 county
• 
  Mirabilis jalapa L. Introduced MIJA

  marvel of Peru · Nyctaginaceae 7 counties
• 
  Mirabilis linearis (Pursh) Heimerl Native MILI3

  narrowleaf four o'clock · Nyctaginaceae 1 county
• 
  Mirabilis nyctaginea (Michx.) MacMill. Native MINY

  heartleaf four o'clock · Nyctaginaceae 32 counties
• 
  Miscanthus sinensis Andersson Introduced MISI

  Chinese silvergrass · Poaceae 11 counties
• 
  Misopates orontium (L.) Raf. Introduced MIOR

  linearleaf snapdragon · Scrophulariaceae 2 counties
• 
  Mitchella repens L. Native MIRE

  partridgeberry · Rubiaceae 67 counties
• 
  Mitella diphylla L. Native MIDI3

  twoleaf miterwort · Saxifragaceae 66 counties
• 
  Mitella nuda L. Native MINU3

  naked miterwort · Saxifragaceae 2 counties
• 
  Modiola caroliniana (L.) G. Don Native MOCA

  Carolina bristlemallow · Malvaceae 1 county
• 
  Moehringia lateriflora (L.) Fenzl Native MOLA6

  bluntleaf sandwort · Caryophyllaceae 29 counties
• 
  Moenchia erecta (L.) G. Gaertn., B. Mey. & Scherb. Introduced MOER

  upright chickweed · Caryophyllaceae 1 county
• 
  Molinia caerulea (L.) Moench Introduced MOCA2

  purple moorgrass · Poaceae 1 county
• 
  Mollugo cerviana (L.) Ser. Introduced MOCE

  threadstem carpetweed · Molluginaceae 1 county
• 
  Mollugo verticillata L. Native MOVE

  green carpetweed · Molluginaceae 55 counties
• 
  Moluccella laevis L. Introduced MOLA

  shellflower · Lamiaceae 2 counties
• 
  Momordica charantia L. Introduced MOCH2

  balsampear · Cucurbitaceae 2 counties
• 
  Monarda clinopodia L. Native MOCL

  white bergamot · Lamiaceae 61 counties
• 
  Monarda didyma L. Native MODI

  scarlet beebalm · Lamiaceae 55 counties
• 
  Monarda fistulosa L. Native MOFI

  wild bergamot · Lamiaceae 53 counties
• 
  Monarda fistulosa L. ssp. fistulosa Native MOFIF

  wild bergamot · Lamiaceae 53 counties
• 
  Monarda fistulosa L. ssp. fistulosa var. mollis (L.) Benth. Native MOFIM3

  wild bergamot · Lamiaceae 37 counties
• 
  Monarda fistulosa L. ssp. fistulosa var. rubra A. Gray Native MOFIR

  wild bergamot · Lamiaceae 4 counties
• 
  Monarda media Willd. Native MOME

  purple bergamot · Lamiaceae 31 counties
• 
  Monarda punctata L. Native MOPU

  spotted beebalm · Lamiaceae 5 counties
• 
  Monarda punctata L. ssp. punctata Native MOPUP

  spotted beebalm · Lamiaceae 4 counties