Weed Herbarium – by Scientific Name

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Panicum
Panicum capillare witchgrass Poaceae (Graminae) - Grass Family
Panicum dichotomiflorum fall panicum Poaceae (Graminae) - Grass Family
Panicum virgatum switchgrass Poaceae (Graminae) - Grass Family
Parthenocissus
Parthenocissus quinquefolia Virginia creeper Vitaceae - Grape Family
Paspalum
Paspalum dilatatum dallis grass Poaceae (Graminae) - Grass Family
Paspalum setaceum paspalum Poaceae (Graminae) - Grass Family
Pastinaca
Pastinaca sativa wild parsnip Apiaceae (Umbelliferae) - Carrot Family
Persicaria
Persicaria sagittata see - Polygonum sagittatum
Persicaria virginica see - Tovara virginiana
Persicaria arifolia see - Polygonum arifolium
Persicaria maculosa see - Polygonum persicaria
Persicaria pensylvanica see - Polygonum pensylvanicum
Petasites
Petasites hybridus butterburdock Asteraceae (Compositae) - Aster or Sunflower Family
Phalaris
Phalaris arundinacea reed canary grass Poaceae (Graminae) - Grass Family
Phleum
Phleum pratense timothy Poaceae (Graminae) - Grass Family
Phragmites
Phragmites communis see - Phragmites australis
Phragmites australis common reed Poaceae (Graminae) - Grass Family
Phytolacca
Phytolacca americana common pokeweed Phytolaccaceae - Pokeweed Family
Pilea
Pilea pumila clearweed Urticaceae - Nettle Family
Plantago
Plantago lanceolata narrowleaf plantain Plantaginaceae - Plantain Family
Plantago major broadleaf plantain Plantaginaceae - Plantain Family
Poa
Poa annua annual bluegrass Poaceae (Graminae) - Grass Family
Poa bulbosa bulbous bluegrass Poaceae (Graminae) - Grass Family
Polygonum
Polygonum virginianum see - Tovara virginiana
Polygonum arifolium Halberd-leaved tearthumb Polygonaceae - Smartweed or Buckwheat Family
Polygonum aviculare prostrate knotweed Polygonaceae - Smartweed or Buckwheat Family
Polygonum cilinode black fringed knotweed Polygonaceae - Smartweed or Buckwheat Family
Polygonum convolvulus wild buckwheat Polygonaceae - Smartweed or Buckwheat Family
Polygonum cuspidatum Japanese knotweed Polygonaceae - Smartweed or Buckwheat Family
Polygonum pensylvanicum Pennsylvania smartweed Polygonaceae - Smartweed or Buckwheat Family
Polygonum persicaria lady's thumb smartweed Polygonaceae - Smartweed or Buckwheat Family
Polygonum sachalinense giant knotweed Polygonaceae - Smartweed or Buckwheat Family
Polygonum sagittatum arrowleaf tear-thumb Polygonaceae - Smartweed or Buckwheat Family
Polygonum scandens hedge smartweed Polygonaceae - Smartweed or Buckwheat Family
Portulaca
Portulaca oleracea common purslane Portulacaceae - Purslane Family
Potentilla
Potentilla argentea silvery cinquefoil Rosaceae - Rose Family
Potentilla norvegica rough cinquefoil Rosaceae - Rose Family
Potentilla recta sulfur cinquefoil Rosaceae - Rose Family
Potentilla simplex old field cinquefoil Rosaceae - Rose Family
Prunella
Prunella vulgaris heal-all Lamiaceae (Labiatae) - Mint Family
Pteridium
Pteridium aquilinum bracken fern Polypodiaceae - Fern Family
Pueraria
Pueraria lobata see - Pueraria montana
Pueraria montana kudzu Fabaceae (Leguminosae) - Pea or Bean Family