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 2,301–2,350 of 3,901.

• 
  Monotropa hypopitys L. Native MOHY3

  pinesap · Monotropaceae 51 counties
• 
  Monotropa uniflora L. Native MOUN3

  Indianpipe · Monotropaceae 62 counties
• 
  Montia chamissoi (Ledeb. ex Spreng.) Greene Native MOCH

  water minerslettuce · Portulacaceae 1 county
• 
  Morella caroliniensis (Mill.) Small Native MOCA7

  southern bayberry · Myricaceae 2 counties
• 
  Morella pensylvanica (Mirb.) Kartesz Native MOPE6

  northern bayberry · Myricaceae 24 counties
• 
  Morus alba L. Introduced MOAL

  white mulberry · Moraceae 46 counties
• 
  Morus rubra L. Native MORU2

  red mulberry · Moraceae 41 counties
• 
  Morus rubra L. var. rubra Native MORUR

  red mulberry · Moraceae 41 counties
• 
  Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi Native MUAS

  scratchgrass · Poaceae 2 counties
• 
  Muhlenbergia capillaris (Lam.) Trin. Native MUCA2

  hairawn muhly · Poaceae 1 county
• 
  Muhlenbergia cuspidata (Torr. ex Hook.) Rydb. Native MUCU3

  plains muhly · Poaceae 1 county
• 
  Muhlenbergia frondosa (Poir.) Fernald Native MUFR2

  wirestem muhly · Poaceae 60 counties
• 
  Muhlenbergia glomerata (Willd.) Trin. Native MUGL3

  spiked muhly · Poaceae 24 counties
• 
  Muhlenbergia mexicana (L.) Trin. Native MUME2

  Mexican muhly · Poaceae 29 counties
• 
  Muhlenbergia schreberi J.F. Gmel. Native MUSC

  nimblewill · Poaceae 59 counties
• 
  Muhlenbergia sobolifera (Muhl. ex Willd.) Trin. Native MUSO

  rock muhly · Poaceae 32 counties
• 
  Muhlenbergia sylvatica (Torr.) Torr. ex A. Gray Native MUSY

  woodland muhly · Poaceae 47 counties
• 
  Muhlenbergia tenuiflora (Willd.) Britton, Sterns & Poggenb. Native MUTE

  slimflower muhly · Poaceae 32 counties
• 
  Muhlenbergia uniflora (Muhl.) Fernald Native MUUN

  bog muhly · Poaceae 5 counties
• 
  Muscari botryoides (L.) Mill. Introduced MUBO

  common grape hyacinth · Liliaceae 28 counties
• 
  Muscari neglectum Guss. ex Ten. Introduced MUNE

  starch grape hyacinth · Liliaceae 4 counties
• 
  Myosotis arvensis (L.) Hill Introduced MYAR

  field forget-me-not · Boraginaceae 11 counties
• 
  Myosotis discolor Pers. Introduced MYDI

  changing forget-me-not · Boraginaceae 3 counties
• 
  Myosotis laxa Lehm. Native MYLA

  bay forget-me-not · Boraginaceae 55 counties
• 
  Myosotis scorpioides L. Introduced MYSC

  true forget-me-not · Boraginaceae 53 counties
• 
  Myosotis stricta Link ex Roem. & Schult. Introduced MYST2

  strict forget-me-not · Boraginaceae 7 counties
• 
  Myosotis sylvatica Ehrh. Introduced MYSY

  woodland forget-me-not · Boraginaceae 3 counties
• 
  Myosotis verna Nutt. Native MYVE

  spring forget-me-not · Boraginaceae 27 counties
• 
  Myosoton aquaticum (L.) Moench Introduced MYAQ

  giantchickweed · Caryophyllaceae 39 counties
• 
  Myosurus minimus L. Native MYMI2

  tiny mousetail · Ranunculaceae 1 county
• 
  Myrica gale L. Native MYGA

  sweetgale · Myricaceae 5 counties
• 
  Myriophyllum aquaticum (Vell.) Verdc. Introduced MYAQ2

  parrot feather watermilfoil · Haloragaceae 6 counties
• 
  Myriophyllum farwellii Morong Native MYFA2

  Farwell's watermilfoil · Haloragaceae 3 counties
• 
  Myriophyllum heterophyllum Michx. Native MYHE2

  twoleaf watermilfoil · Haloragaceae 3 counties
• 
  Myriophyllum humile (Raf.) Morong Native MYHU

  low watermilfoil · Haloragaceae 14 counties
• 
  Myriophyllum sibiricum Kom. Native MYSI

  shortspike watermilfoil · Haloragaceae 10 counties
• 
  Myriophyllum spicatum L. Introduced MYSP2

  Eurasian watermilfoil · Haloragaceae 23 counties
• 
  Myriophyllum tenellum Bigelow Native MYTE

  slender watermilfoil · Haloragaceae 4 counties
• 
  Myriophyllum verticillatum L. Native MYVE3

  whorl-leaf watermilfoil · Haloragaceae 2 counties
• 
  Najas flexilis (Willd.) Rostk. & Schmidt Native NAFL

  nodding waternymph · Najadaceae 31 counties
• 
  Najas gracillima (A. Braun ex Engelm.) Magnus Native NAGR

  slender waternymph · Najadaceae 13 counties
• 
  Najas guadalupensis (Spreng.) Magnus Native NAGU

  southern waternymph · Najadaceae 8 counties
• 
  Najas guadalupensis (Spreng.) Magnus ssp. guadalupensis Native NAGUG

  southern waternymph · Najadaceae 8 counties
• 
  Najas marina L. Native NAMA

  spiny naiad · Najadaceae 1 county
• 
  Najas minor All. Introduced NAMI

  brittle waternymph · Najadaceae 11 counties
• 
  Narcissus poeticus L. Introduced NAPO

  poet's narcissus · Liliaceae 15 counties
• 
  Narcissus pseudonarcissus L. Introduced NAPS

  daffodil · Liliaceae 14 counties
• 
  Nasturtium microphyllum Boenn. ex Rchb. Introduced NAMI2

  onerow yellowcress · Brassicaceae 4 counties
• 
  Nasturtium officinale W.T. Aiton Introduced NAOF

  watercress · Brassicaceae 51 counties
• 
  Navarretia squarrosa (Eschsch.) Hook. & Arn. Native NASQ

  skunkbush · Polemoniaceae 1 county