Ohio

• Adams 39001
  1,331 taxa Open ↗
• Allen 39003
  1,038 taxa Open ↗
• Ashland 39005
  998 taxa Open ↗
• Ashtabula 39007
  1,437 taxa Open ↗
• Athens 39009
  1,149 taxa Open ↗
• Auglaize 39011
  958 taxa Open ↗
• Belmont 39013
  945 taxa Open ↗
• Brown 39015
  629 taxa Open ↗
• Butler 39017
  850 taxa Open ↗
• Carroll 39019
  933 taxa Open ↗

Showing 501–550 of 796 (introduced).

• 
  Papaver somniferum L. Introduced PASO2

  opium poppy · Papaveraceae 4 counties
• 
  Parthenium hysterophorus L. Introduced PAHY

  Santa Maria feverfew · Asteraceae 2 counties
• 
  Pastinaca sativa L. Introduced PASA2

  wild parsnip · Apiaceae 80 counties
• 
  Paulownia tomentosa (Thunb.) Siebold & Zucc. ex Steud. Introduced PATO2

  princesstree · Scrophulariaceae 4 counties
• 
  Pennisetum alopecuroides (L.) Spreng. Introduced PEAL

  Chinese fountaingrass · Poaceae 3 counties
• 
  Pennisetum glaucum (L.) R. Br. Introduced PEGL2

  pearl millet · Poaceae 6 counties
• 
  Perilla frutescens (L.) Britton Introduced PEFR4

  beefsteakplant · Lamiaceae 20 counties
• 
  Perilla frutescens (L.) Britton var. frutescens Introduced PEFRF2

  beefsteakplant · Lamiaceae 19 counties
• 
  Petasites hybridus (L.) G. Gaertn., B. Mey. & Scherb. Introduced PEHY

  pestilence wort · Asteraceae 1 county
• 
  Petrorhagia prolifera (L.) P.W. Ball & Heywood Introduced PEPR4

  childing pink · Caryophyllaceae 1 county
• 
  Petrorhagia saxifraga (L.) Link Introduced PESA9

  saxifrage pink · Caryophyllaceae 1 county
• 
  Petroselinum crispum (Mill.) Nyman ex A.W. Hill Introduced PECR2

  parsley · Apiaceae 2 counties
• ⚘
  Petunia ×atkinsiana D. Don ex Loudon [axillaris × integrifolia] Introduced PEAT7

  petunia · Solanaceae 18 counties
• 
  Phalaris canariensis L. Introduced PHCA5

  annual canarygrass · Poaceae 1 county
• 
  Phaseolus coccineus L. Introduced PHCO6

  scarlet runner · Fabaceae 2 counties
• 
  Phaseolus vulgaris L. Introduced PHVU

  kidney bean · Fabaceae 2 counties
• 
  Philadelphus coronarius L. Introduced PHCO7

  sweet mock orange · Hydrangeaceae 14 counties
• 
  Phleum pratense L. Introduced PHPR3

  timothy · Poaceae 4 counties
• 
  Phragmites australis (Cav.) Trin. ex Steud. ssp. australis Introduced PHAUA7

  European common reed · Poaceae 4 counties
• 
  Phyllanthus tenellus Roxb. Introduced PHTE5

  Mascarene Island leaf-flower · Euphorbiaceae 1 county
• 
  Phyllostachys nigra (Lodd. ex Lindl.) Munro Introduced PHNI80

  black bamboo · Poaceae 1 county
• 
  Physalis alkekengi L. Introduced PHAL5

  strawberry groundcherry · Solanaceae 6 counties
• 
  Physalis philadelphica Lam. Introduced PHPH2

  Mexican groundcherry · Solanaceae 3 counties
• 
  Physalis philadelphica Lam. var. immaculata Waterf. Introduced PHPHI

  Mexican groundcherry · Solanaceae 3 counties
• 
  Picea abies (L.) Karst. Introduced PIAB

  Norway spruce · Pinaceae 1 county
• 
  Picris echioides L. Introduced PIEC

  bristly oxtongue · Asteraceae 3 counties
• 
  Picris hieracioides L. ssp. hieracioides Introduced PIHIH

  hawkweed oxtongue · Asteraceae 3 counties
• 
  Pinellia ternata (Thunb.) Makino ex Breitenbach Introduced PITE

  crowdipper · Araceae 1 county
• 
  Plantago arenaria Waldst. & Kit. Introduced PLAR6

  sand plantain · Plantaginaceae 9 counties
• 
  Plantago lanceolata L. Introduced PLLA

  narrowleaf plantain · Plantaginaceae 78 counties
• 
  Plantago major L. Introduced PLMA2

  common plantain · Plantaginaceae 47 counties
• 
  Poa annua L. Introduced POAN

  annual bluegrass · Poaceae 2 counties
• 
  Poa bulbosa L. Introduced POBU

  bulbous bluegrass · Poaceae 1 county
• 
  Poa compressa L. Introduced POCO

  Canada bluegrass · Poaceae 4 counties
• 
  Poa nemoralis L. ssp. nemoralis Introduced PONEN2

  wood bluegrass · Poaceae 1 county
• 
  Poa pratensis L. ssp. pratensis Introduced POPRP2

  Kentucky bluegrass · Poaceae 5 counties
• 
  Poa trivialis L. Introduced POTR2

  rough bluegrass · Poaceae 2 counties
• 
  Polemonium caeruleum L. Introduced POCA2

  charity · Polemoniaceae 1 county
• 
  Polygonum arenastrum Jord. ex Boreau Introduced POAR11

  oval-leaf knotweed · Polygonaceae 3 counties
• 
  Polygonum aviculare L. Introduced POAV

  prostrate knotweed · Polygonaceae 64 counties
• 
  Polygonum cespitosum Blume var. longisetum (Bruijn) A.N. Steward Introduced POCEL

  Oriental lady's thumb · Polygonaceae 36 counties
• 
  Polygonum cespitosum Blume, nom. inq. Introduced POCE4

  Oriental lady's thumb · Polygonaceae 36 counties
• 
  Polygonum convolvulus L. Introduced POCO10

  black bindweed · Polygonaceae 64 counties
• 
  Polygonum convolvulus L. var. convolvulus Introduced POCOC2

  black bindweed · Polygonaceae 64 counties
• 
  Polygonum cuspidatum Siebold & Zucc. Introduced POCU6

  Japanese knotweed · Polygonaceae 35 counties
• 
  Polygonum hydropiper L. Introduced POHY

  marshpepper knotweed · Polygonaceae 56 counties
• 
  Polygonum orientale L. Introduced POOR2

  kiss me over the garden gate · Polygonaceae 28 counties
• 
  Polygonum perfoliatum L. Introduced POPE10

  Asiatic tearthumb · Polygonaceae 1 county
• 
  Polygonum persicaria L. Introduced POPE3

  spotted ladysthumb · Polygonaceae 73 counties
• 
  Polygonum sachalinense F. Schmidt ex Maxim. Introduced POSA4

  giant knotweed · Polygonaceae 7 counties