UMass Extension Landscape, Nursery and Urban Forestry Program

Weed Herbarium – by Scientific Name

Welcome to the UMass Extension Weed Herbarium! Weeds in the herbarium can be viewed by common name, scientific name, or plant family by using the menu tabs below. Images and notes to aid in identification are revealed by clicking on the weed name. For questions and permission to use photos contact Randy Prostak; rprostak@umext.umass.edu.

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Abutilon
Abutilon theophrasti velvetleaf Malvaceae - Mallow Family
Acalypha
Acalypha rhomboidea copper-leaf, rhombic Euphorbiaceae - Spurge Family
Achillea
Achillea millefolium yarrow Asteraceae (Compositae) - Aster or Sunflower Family
Actinomeris
Actinomeris alternifolia see - Verbesina alternifolia
Aegopodium
Aegopodium podagraria goutweed, bishops Apiaceae (Umbelliferae) - Carrot Family
Ageratina
Ageratina altissima see - Eupatorium rugosum
Agrimonia
Agrimonia gryposepala agrimony Rosaceae - Rose Family
Agropyron
Agropyron repens see - Elytrigia repens
Agrostis
Agrostis palustris see - Agrostis stolonifera
Agrostis stolonifera bentgrass, creeping Poaceae (Graminae) - Grass Family
Ailanthus
Ailanthus altissima tree-of-Heaven Simaroubaceae - Quassia Family
Akebia
Akebia quinata akebia, five-leaf Lardizabalaceae - Lardizabala Family
Alliaria
Alliaria petiolata mustard, garlic Brassicaceae (Cruciferae) - Mustard Family
Allium
Allium vineale garlic, wild Liliaceae - Lily Family
Alopecurus
Alopecurus pratensis foxtail, meadow Poaceae (Graminae) - Grass Family
Amaranthus
Amaranthus lividus pigweed, livid Amaranthaceae - Amaranth Family
Amaranthus retroflexus pigweed, red root Amaranthaceae - Amaranth Family
Amaranthus spinosus amaranth, spiny Amaranthaceae - Amaranth Family
Ambrosia
Ambrosia artemisiifolia ragweed , common Asteraceae (Compositae) - Aster or Sunflower Family
Ambrosia trifida ragweed, giant Asteraceae (Compositae) - Aster or Sunflower Family
Ampelopsis
Ampelopsis brevipedunculata porcelainberry Vitaceae - Grape Family
Amphicarpaea
Amphicarpaea bracteata hog-peanut Fabaceae (Leguminosae) - Pea or Bean Family
Anagallis
Anagallis arvensis pimpernel, scarlet Primulaceae - Primrose Family
Anaphalis
Anaphalis margaritacea pearly-everlasting Asteraceae (Compositae) - Aster or Sunflower Family
Andropogon
Andropogon gerardii big bluestem Poaceae (Graminae) - Grass Family
Andropogon scoparius bluestem, little Poaceae (Graminae) - Grass Family
Angelica
Angelica atropurpurea angelica, purplestem Apiaceae (Umbelliferae) - Carrot Family
Anoda
Anoda cristata anoda, spurred Malvaceae - Mallow Family
Antennaria
Antennaria neglecta pussytoes, field Asteraceae (Compositae) - Aster or Sunflower Family
Anthoxanthum
Anthoxanthum odoratum vernalgrass, sweet Poaceae (Graminae) - Grass Family
Apios
Apios americana groundnut Fabaceae (Leguminosae) - Pea or Bean Family
Apocynum
Apocynum androsaemifolium dogbane, spreading Apocynaceae - Dogbane Family
Apocynum cannabinum dogbane, hemp Apocynaceae - Dogbane Family
Arabidopsis
Arabidopsis thaliana cress, mouse-ear Brassicaceae (Cruciferae) - Mustard Family
Arabis
Arabis glabra mustard, tower Brassicaceae (Cruciferae) - Mustard Family
Aralia
Aralia spinosa devil's walkingstick Araliaceae - Aralia Family
Arctium
Arctium lappa burdock, great Asteraceae (Compositae) - Aster or Sunflower Family
Arctium minus burdock, common Asteraceae (Compositae) - Aster or Sunflower Family
Arenaria
Arenaria serpyllifolia sandwort, thymeleaf Caryophyllaceae - Pink Family
Artemisia
Artemisia vulgaris mugwort Asteraceae (Compositae) - Aster or Sunflower Family
Asclepias
Asclepias incarnata milkweed, swamp Asclepiadaceae - Milkweed Family
Asclepias syriaca milkweed, common Asclepiadaceae - Milkweed Family
Aster
Aster acuminatus see - Oclemena acuminata
Aster divaricatus aster, white wood Asteraceae (Compositae) - Aster or Sunflower Family