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