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UMass Extension Weed Herbarium
 

Welcome to the UMass Extension Weed Herbarium! Weeds in the herbarium can be sorted by common name, scientific name, or plant family by using the "Sort list by" links 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.

This online herbarium is a feature of the UMass Extension Landscape, Nursery, and Urban Forestry Program web site. Take me to the home page >>

Sort list by: Common Name | Scientific Name | Family Name

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R |S | T |U |V | W | X | Y | Z

A    
Abutilon theophrasti velvetleaf Malvaceae - Mallow Family
Acalypha virginica copper-leaf, Virginia Euphorbiaceae - Spurge Family
Achillea millefolium yarrow Asteraceae (Compositae) - Aster or Sunflower Family
Aegopodium podagraria bishops goutweed Apiaceae (Umbelliferae) - Carrot Family
Agropyron repens - see Elytrigia repens -
Agrostis palustris - see Agrostis stolonifera -
Agrostis stolonifera creeping bentgrass Poaceae (Graminae) - Grass Family
Ailanthus altissima tree-of-heaven Simaroubaceae - Quassia Family
Alliaria petiolata mustard, garlic Brassicaceae (Cruciferae) - Mustard Family
Allium vineale garlic, wild Liliaceae - Lily Family
Amaranthus lividus pigweed, prostrate Amaranthaceae - Amaranth Family
Amaranthus retroflexus pigweed, redroot 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
Anagallis arvensis pimpernel, scarlet Primulaceae - Primrose Family
Anaphalis margaritacea pearly-everlasting Asteraceae (Compositae) - Aster or Sunflower Family
Andropogon gerardii bluestem, big Poaceae (Graminae) - Grass Family
Andropogon scoparius bluestem, little Poaceae (Graminae) - Grass 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 Bassicaceae (Cruciferae) - Mustard Family
Arabis glabra mustard, tower Brassicaceae (Cruciferae) - Mustard Family
Arctium minus burdock, common Asteraceae (Compositae) - Aster or Sunflower Family
Artemisia vulgaris mugwort Asteraceae (Compositae) - Aster or Sunflower Family
Asclepias syriaca milkweed, common Asclepiadaceae - Milkweed Family
Aster divaricatus aster, white wood Asteraceae (Compositae) - Aster or Sunflower Family
B    
Barbarea vulgaris rocket, yellow Brassicaceae (Cruciferae) - Mustard Family
Berteroa incana alyssum, hoary Brassicaceae (Cruciferae) - Mustard Family
Bidens frondosa beggarticks, devil's Asteraceae (Compositae) - Aster or Sunflower
Brassica arvensis - see Brassica kaber -
Brassica kaber mustard, wild Brassicaceae (Cruciferae) - Mustard Family
Bromus inermis brome, smooth Poaceae (Graminae) - Grass Family
Bromus tectorum brome, downy Poaceae (Graminae) - Grass Family
C    
Calystegia sepium bindweed, hedge Convolvulaceae - Morningglory Family
Capsella bursa-pastoris shepherd's-purse Brassicaceae (Cruciferae) - Mustard Family
Cardamine hirsuta bittercress Brassicaceae (Cruciferae) - Mustard Family
Cardamine pratensis bittercress, cuckoo Brassicaceae (Cruciferae) - Mustard Family
Carduus arvensis - see Cirsium arvensis -
Carduus vulgare - see Cirsium vulgare -
Celastrus orbiculatus bittersweet, oriental Celastraceae - Stafftree Family
Centaurea maculosa knapweed, spotted Asteraceae (Compositae) - Aster or Sunflower Family
Cerastium vulgatum chickweed, mouseear Caryophyllaceae - Pink Family
Chamaesyce maculata - see Euphorbia maculata -
Chelidonium majus celandine, greater Papaveraceae - Poppy Family
Chenopodium album lambsquarters, common Chenopodiaceae - Goosefoot Family
Chenopodium ambrosioides mexicantea Chenopodiaceae - Goosefoot Family
Chrysanthemum leucanthemum daisy, oxeye Asteraceae (Compositae) - Aster or Sunflower Family
Cichorium intybus chicory Asteraceae (Compositae) - Aster or Sunflower Family
Cicuta maculata waterhemlock, spotted Apiaceae (Umbelliferae) - Carrot Family
Cirsium arvense thistle, Canada Asteraceae (Compositae) - Aster or Sunflower Family
Cirsium vulgare thistle, bull Asteraceae (Compositae) - Aster or Sunflower Family
Clematis virginiana virgin's bower Ranunculaceae - Buttercup Family
Commelia communis dayflower, Asiatic Commelinaceae - Spiderwort Family
Convolvulus arvensis bindweed, field Convolvulaceae - Morningglory Family
Convolvulus sepium - see Calystegia sepium -
Conyza canadensis horseweed Asteraceae (Compositae) - Aster or Sunflower Family
Coronilla varia crownvetch, trailing Fabaceae (Leguminosae) - Pea or Bean Family
Crepis tectorum hawksbeard, narrowleaf Asteraceae (Compositae) - Aster or Sunflower Family
Cuscuta spp. dodder Convolvulaceae - Morningglory Family
Cymbalaria muralis kenilworth ivy Scrophulariaceae - Figwort Family
Cynanchum lousieae - see Cynanchum nigrum -
Cynanchum nigrum swallowwort, black Asclepiadaceae - Milkweed Family
Cynanchum rossicum swallowwort, pale Asclepiadaceae - Milkweed Family
Cyperus esculentus nutsedge, yellow Cyperaceae - Sedge Family
D    
Dactylis glomerata orchardgrass Poaceae (Graminae) - Grass Family
Datura stramonium jimsonweed Solanaceae - Nightshade Family
Daucus carota carrot, wild Apiaceae (Umbelliferae) - Carrot Family
Dianthus deltoides maiden pink Caryophyllaceae - Pink Family
Dicanthelium clandestinum deertonguegrass Poaceae (Graminae) - Grass Family
Dicanthelium sphaerocarpon panicgrass, round fruited Poaceae (Graminae) - Grass Family
Digitaria ischaemum crabgrass, smooth Poaceae (Graminae) - Grass Family
Digitaria sanguinalis crabgrass, large Poaceae (Graminae) - Grass Family
Dipsacus fullonum teasel Dipsacaceae - Teasel Family
Dipsacus sylvestris - see Dipsacus fullonum -
Draba verna whitlowgrass, spring Brassicaceae (Cruciferae) - Mustard Family
E    
Echinochloa crus-galli barnyardgrass Poaceae (Graminae) - Grass Family
Echinocystis lobata cucumber, wild Cucurbitaceae - Gourd Family
Echium vulgare blueweed Boraginaceae - Borage Family
Eleusine indica goosegrass Poaceae (Graminae) - Grass Family
Elymus repens - see Elytrigia repens -
Elytrigia repens quackgrass Poaceae (Graminae) - Grass Family
Epilobium angustifolium fireweed Onagraceae - Evening Primrose Family
Equisetum arvense horsetail, field Equisetaceae - Horsetail Family
Erechtites hieraciifolia pilewort Asteraceae (Compositae) - Aster or Sunflower Family
Erigeron annuus fleabane, annual Asteraceae (Compositae) - Aster or Sunflower Family
Eragrostis cilianensis stinkgrass Poaceae (Graminae) - Grass Family
Eragrotis spectabilis lovegrass, purple Poaceae (Graminae) - Grass Family
Erigeron canadensis - see Conyza canadensis -
Erigeron pulchellus fleabane, poor-robin Asteraceae (Compositae) - Aster or Sunflower Family
Erodium cicutarium filaree, redstem Geranium - Geranium Family
Eupatoriadelphus dubius - see Eupatorium dubium -
Eupatoriadelphus maculatus - see Eupatorium maculatum -
Eupatoriadelphus dubius - see Eupatorium dubium -
Eupatorium dubium joe-pye weed, eastern Asteraceae (Compositae) - Aster or Sunflower Family
Eupatorium fistulosum joe-pye weed, hollow-stemmed Asteraceae (Compositae) - Aster or Sunflower Family
Eupatorium maculatum joe-pye weed, spotted Asteraceae (Compositae) - Aster or Sunflower Family
Eupatorium perfoliatum boneset Asteraceae (Compositae) - Aster or Sunflower Family
Eupatorium rugosum snakeroot, white Asteraceae (Compositae) - Aster or Sunflower Family
Euphorbia cyparissias spurge, cypress Euphorbiaceae - Spurge Family
Euphorbia maculata spurge, spotted Euphorbiaceae - Spurge Family
F    
Fallopia japonica - see Polygonum cuspidatum -
Festuca arundinacea fescue, tall Poaceae (Graminae) - Grass Family
Fragaria virginiana strawberry, wild Rosaceae - Rose Family
Froelichia gracilis cottonweed Amaranthaceae - Amaranth Family
G    
Galinsoga ciliata galinsoga, hairy Asteraceae (Compositae) - Aster or Sunflower Family
Galium aparine bedstraw, catchweed Rubiaceae - Madder Family
Galium mollugo bedstraw, smooth Rubiaceae - Madder Family
Glechoma hederacea ground ivy Lamiaceae (Labiatae) - Mint Family
H    
Helianthus tuberosus Jerusalem artichoke Asteraceae (Compositae) - Aster or Sunflower Family
Heracleum lanatum cowparsnip Apiaceae (Umbelliferae) - Carrot Family
Hesperis matronalis damesrocket Brassicaceae (Cruciferae) - Mustard Family
Hibicus trionum mallow, venice Malvaceae - Mallow Family
Hieracium aurantiacum hawkweed, orange Asteraceae (Compositae) - Aster or Sunflower Family
Hieracium pratense hawkweed Asteraceae (Compositae) - Aster or Sunflower Family
Houstonia caerulea bluets Rubiaceae - Madder Family
Hypericum perforatum St. Johnswort Hyperiacaceae - St. Johnswort Family
Hypochaeris radicata cat's ear/false dandelion Asteraceae (Compositae) - Aster or Sunflower Family
I    
Impatiens capensis touch-me-not, spotted Balsaminaceae - Touch-me-not Family
Impatiens glandulifera balsam, Himalaya Balsaminaceae - Touch-me-not Family
Impatiens pallida touch-me-not, pale Balsaminaceae - Touch-me-not Family
J    
Juncus tenuis rush, path Juncaceae - Rush Family
L    
Lactuca biennis lettuce, biennial Asteraceae (Compositae) - Aster or Sunflower Family
Lactuca canadensis lettuce, tall Asteraceae (Compositae) - Aster or Sunflower Family
Lactuca scariola - see Lactuca serriola -
Lactuca serriola lettuce, prickly Asteraceae (Compositae) - Aster or Sunflower Family
Lamium amplexicaule henbit Lamiaceae (Labiatae) - Mint Family
Lamium purpureum deadnettle, red Lamiaceae (Labiatae) - Mint Family
Lapsana communis nipplewort Asteraceae (Compositae) - Aster or Sunflower Family
Leucanthemum leucanthemum - see Chrysanthemum leucanthemum -
Leontodon autumnalis dandelion, fall Asteraceae (Compositae) - Aster or Sunflower Family
Leonurus cardiaca motherwort Lamiaceae (Labiatae) - Mint Family
Lepidium campestre pepperweed, field Brassicaceae (Cruciferae) - Mustard Family
Lepidium virginicum pepperweed, Virginia Brassicaceae (Cruciferae) - Mustard Family
Linaria canadensis toadflax, oldfield Scrophulariaceae - Figwort Family
Linaria cymbalaria - see Cymbularia muralis -
Linaria vulgaris toadflax, yellow Scrophulariaceae - Figwort Family
Lobelia inflata tobacco, indian Lobeliaceae - Bluebell Family
Lotus corniculatus trefoil, birdfoot Fabaceae (Leguminosae) - Pea or Bean Family
Lychnis alba - see Silene alba -
Lychnis flos-cuculi ragged robin Caryophyllaceae - Pink Family
Lysimachia nummularia moneywort Primulaceae - Primrose Family
Lythrum salicaria loosestrife, purple Lythraceae - Loosestrife Family
M    
Malva neglecta mallow, common Malvaceae - Mallow Family
Marchantia polymorpha liverwort Phylum: Hepatophyta
Matricaria matricariodes pineappleweed Asteraceae (Compositae) - Aster or Sunflower Family
Medicago lupulina medic, black Fabaceae (Leguminosae) - Pea or Bean Family
Melilotus alba sweetclover, white Fabaceae (Leguminosae) - Pea or Bean Family
Melilotus offincinalis sweetclover, yellow Fabaceae (Leguminosae) - Pea or Bean Family
Microstegium vimineum stiltgrass, Japanese Poaceae (Graminae) - Grass Family
Mirabilis nyctaginea four-o'clock, wild Nyctaginaceae - Four-O'clock Family
Mollugo verticillata carpetweed Aizoaceae - Carpetweed Family
Muhlenbergia schreberi nimblewill Poaceae (Graminae) - Grass Family
N    
Nuttallanthus canadensis - see Linaria canadensis -
O    
Oenothera biennis eveningprimrose, common Onagraceae - Evening Primrose Family
Oxalis corniculata woodsorrel, creeping Oxalidaceae - Woodsorrel Family
Oxalis stricta woodsorrel, yellow Oxalidaceae - Woodsorrel Family
P    
Panicum capillare witchgrass Poaceae (Graminae) - Grass Family
Panicum dichotomiflorum panicum, fall Poaceae (Graminae) - Grass Family
Paspalum setaceum paspalum Poaceae (Graminae) - Grass Family
Pastinaca sativa parsnip, wild Apiaceae (Umbelliferae) - Carrot Family
Phalaris arundinacea canarygrass, reed Poaceae (Graminae) - Grass Family
Phleum pratense timothy Poaceae (Graminae) - Grass Family
Phytolacca americana pokeweed, common Phytolaccaceae - Pokeweed Family
Pilea pumila clearweed Urticaceae - Nettle Family
Plantago lanceolata plantain, narrowleaf Plantaginaceae - Plantain Family
Plantago major plantain, broadleaf Plantaginaceae - Plantain Family
Poa annua bluegrass, annual Poaceae (Graminae) - Grass Family
Poa bulbosa bluegrass, bulbous Poaceae (Graminae) – Grass Family
Polygonum aviculare knotweed, prostrate Polygonaceae - Smartweed or Buckwheat Family
Polygonum cilinode knotweed, black fringed Polygonaceae - Smartweed or Buckwheat Family
Polygonum cuspidatum knotweed, Japanese Polygonaceae - Smartweed or Buckwheat Family
Polygonum pensylvanicum smartweed, Pennsylvania Polygonaceae - Smartweed or Buckwheat Family
Polygonum persicaria smartweed, ladysthumb Polygonaceae - Smartweed or Buckwheat Family
Polygonum sachalinense knotweed, giant Polygonaceae - Smartweed or Buckwheat Family
Polygonum scandens buckwheat, wild Polygonaceae - Smartweed or Buckwheat Family
Polygonum virginianum - see Tovara virginianum -
Portulaca oleracea purslane, common Portulacaceae - Purslane Family
Potentilla argentea cinquefoil, silvery Rosaceae - Rose Family
Potentilla norvegica cinquefoil, rough Rosaceae - Rose Family
Potentilla recta cinquefoil, sulfur Rosaceae - Rose Family
Potentilla simplex cinquefoil, old field Rosaceae - Rose Family
Prunella vulgaris healall Lamiaceae (Labiatae) - Mint Family
Pteridium aquilinum brackenfern Polypodiaceae – Fern Family
R    
Ranunculus acris buttercup, tall Ranunculaceae - Buttercup Family
Ranunculus bulbosus buttercup, bulbous Ranunculaceae - Buttercup Family
Raphanus raphanistrum radish, wild Brassicaceae (Cruciferae) - Mustard Family
Rhus glabra sumac, smooth Anacardiaceae - Cashew Family
Rhus typhina sumac, staghorn Anacardiaceae - Cashew Family
Rhus radicans - see Toxicodendron radicans -
Rorippa x prostrata fieldcress, prostrate Brassicaceae (Cruciferae) - Mustard Family
Rosa multiflora rose, multiflora Rosaceae - Rose Family
Rudbeckia hirta black-eyed susan Asteraceae (Compositae) - Aster or Sunflower Family
Rumex acetosella sorrel, red/sheep sorrel Polygonaceae - Smartweed or Buckwheat Family
Rumex crispus dock, curly Polygonaceae - Smartweed or Buckwheat Family
Rumex obtusifolius dock, broadleaf Polygonaceae - Smartweed or Buckwheat Family
S    
Saponaria officinalis bouncingbet Caryophyllaceae - Pink Family
Schizachyrium scoparium - see Andropogon scoparius -
Scleranthus annuus knawel Caryophyllaceae - Pink Family
Senecio jacobaea ragwort, tansy Asteraceae (Compositae) - Aster or Sunflower Family
Senecio vulgaris groundsel, common Asteraceae (Compositae) - Aster or Sunflower Family
Setaria faberi foxtail, giant Poaceae (Graminae) - Grass Family
Setaria glauca foxtail, yellow Poaceae (Graminae) - Grass Family
Setaria lutescens - see Setaria glauca -
Sicyos angulatus burcucumber Curcurbitaceae - Gourd Family
Silene vulgaris bladder campion Caryophyllaceae - Pink Family
Silene alba cockle, white Caryophyllaceae - Pink Family
Silene cucubalus - see Silene vulgaris -
Sinapis arvensis - see Brassica kaber -
Solanum carolinense horsenettle Solanaceae - Nightshade Family
Solanum dulcamara nightshade, bittersweet Solanaceae - Nightshade Family
Solanum ptycanthum nightshade, eastern black Solanaceae - Nightshade Family
Solidago canadensis goldenrod, Canada Asteraceae (Compositae) - Aster or Sunflower Family
Solidago graminifolia goldenrod, narrowleaf Asteraceae (Compositae) - Aster or Sunflower Family
Solidago sempervirens goldenrod, seashore Asteraceae (Compositae) - Aster or Sunflower Family
Sonchus arvensis sowthistle, perennial Asteraceae (Compositae) - Aster or Sunflower Family
Sonchus asper sowthistle, spiny Asteraceae (Compositae) - Aster or Sunflower Family
Sonchus oleraceus sowthistle, annual Asteraceae (Compositae) - Aster or Sunflower Family
Sorghastrum nutans indiangrass, yellow Poaceae (Graminae) – Grass Family
Spergularia rubra sandspurry, red Caryophyllaceae - Pink Family
Stellaria media chickweed, common Caryophyllaceae - Pink Family
Stellaria graminea little starwort Caryophyllaceae - Pink Family
Stellaria graminifolia - see Stellaria graminea -
T    
Tanacetum vulgare tansy Asteraceae (Compositae) - Aster or Sunflower Family
Taraxacum officinale dandelion Asteraceae (Compositae) - Aster or Sunflower Family
Thalictrum polygamum meadowrue, tall Ranunculaceae - Buttercup Family
Thalictrum pubescens - see Thalictrum polygamum -
Thlaspi arvense pennycress, field Brassicaceae (Cruciferae) - Mustard Family
Tovara virginiana knotweed, Virginia Polygonaceae - Smartweed or Buckwheat Family
Toxicodendron radicans poison-ivy Anacardiaceae - Cashew Family
Tragopogon dubius salsify, yellow Asteraceae (Compositae) - Aster or Sunflower Family
Tridens flavus purpletop Poaceae (Graminae) - Grass Family
Trifolium arvense clover, rabbitfoot Fabaceae (Leguminosae) - Pea or Bean Family
Trifolium pratense clover, red Fabaceae (Leguminosae) - Pea or Bean Family
Trifolium repens clover, white Fabaceae (Leguminosae) - Pea or Bean Family
Triodanis perfoliata Venus lookingglass Campanulaceae - Bluebell Family
Triodia flava flavus - see Tridens flavus -
Tussilago farfara coltsfoot Asteraceae (Compositae) - Aster or Sunflower Family
U    
Urtica dioica nettle, stinging Urticaceae - Nettle Family
V    
Verbascum thapsus mullein, common Scrophulariaceae - Figwort Family
Veronica arvensis speedwell, corn Scrophulariaceae - Figwort Family
Veronica hederifolia speedwell, ivyleaf Scrophulariaceae - Figwort Family
Veronica officinalis speedwell, common Scrophulariaceae - Figwort Family
Veronica peregrina speedwell, purslane Scrophulariaceae - Figwort Family
Veronica serpyllifolia speedwell, thymeleaf Scrophulariaceae - Figwort Family
Vicia cracca vetch, bird Fabaceae (Leguminosae) - Pea or Bean Family
Vincetoxicum nigrum - see Cynanchum nigrum -
Vincetoxicum rossicum - see Cynanchum rossicum -
Viola arvensis violet, field Violaceae - Violet Family
Viola papilionacea violet, common blue Violaceae - Violet Family
Vitis spp. grape, wild Vitaceae - Grape Family
X    
Xanthium strumarium cocklebur