UMass Extension Weed Herbarium

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Common Name Scientific Name Family Name
paintbrush, yellow see - hawkweed
panicgrass, round-fruited Dichanthelium sphaerocarpon Poaceae (Graminae) - Grass Family
panicum, fall Panicum dichotomiflorum Poaceae (Graminae) - Grass Family
pansy, field see - violet, field
pansy, wild see - violet, field
parsnip, field see - parsnip, wild
parsnip, wild Pastinaca sativa Apiaceae (Umbelliferae) - Carrot Family
paspalum Paspalum setaceum Poaceae (Graminae) - Grass Family
pearlwort, birdseye Sagina procumbens Caryophyllaceae - Pink Family
pearly-everlasting Anaphalis margaritacea Asteraceae (Compositae) - Aster or Sunflower Family
peavine, everlasting Lathyrus latifolius Fabaceae (Leguminosae) - Pea or Bean Family
pennycress, field Thlaspi arvense Brassicaceae (Cruciferae) - Mustard Family
peppergrass, field see - pepperweed, field
peppergrass, wild see - pepperweed, Virginia
pepperweed, field Lepidium campestre Brassicaceae (Cruciferae) - Mustard Family
pepperweed, Virginia Lepidium virginicum Brassicaceae (Cruciferae) - Mustard Family
piemaker see - velvetleaf
pigeon berry see - pokeweed, common
pigweed, livid Amaranthus lividus Amaranthaceae - Amaranth Family
pigweed, redroot Amaranthus retroflexus Amaranthaceae - Amaranth Family
pigweed, spiny see - amaranth, spiny
pilewort Erechtites hieraciifolia Asteraceae (Compositae) - Aster or Sunflower Family
pimpernel, scarlet Anagallis arvensis Primulaceae - Primrose Family
pineappleweed Matricaria matricariodes Asteraceae (Compositae) - Aster or Sunflower Family
pinkweed see - smartweed, Pennsylvania
plantain, broadleaf Plantago major Plantaginaceae - Plantain Family
plantain, buckhorn see - plantain, narrowleaf
plantain, common see - plantain, broadleaf
plantain, dooryard see - plantain, broadleaf
plantain, English see - plantain, narrowleaf
plantain, narrowleaf Plantago lanceolata Plantaginaceae - Plantain Family
poison ivy Toxicodendron radicans Anacardiaceae - Cashew Family
poke see - pokeweed, common
pokeberry see - pokeweed, common
pokeweed, common Phytolacca americana Phytolaccaceae - Pokeweed Family
poor man's weatherglass see - pimpernel, scarlet
porcelainberry Ampelopsis brevipedunculata Vitaceae - Grape Family
portulaca , wild see - purslane, common
potato bean see - groundnut
purpletop Tridens flavus Poaceae (Graminae) - Grass Family
purslane, common Portulaca oleracea Portulacaceae - Purslane Family
pursley see - purslane, common
pussytoes, field Antennaria neglecta Asteraceae (Compositae) - Aster or Sunflower Family