Winter Weeds Table of Contents Common name Scien fic name Family Page # Wild garlic Allium vineale Liliaceae Lily Family 2 Star of bethlehem Ornithogalum umbellatum Liliaceae Lily Family 3 Bulbous oatgrass Arrhenatherum ela us Poaceae Grass Family 4 Downy brome Bromus tectorum Poaceae Grass Family 5 Annual ryegrass Lolium mul florum Poaceae Grass Family 6 Annual bluegrass Poa annua Poaceae Grass Family 7 Roughstalk bluegrass Poa trivialis Poaceae Grass Family 8 Wild carrot Daucus carota Apiaceae Carrot Family 9 Mayweed chamomile Anthemis cotula Asteraceae Aster Family 10 Cornflower Centaurea cyanus Asteraceae Aster Family 11 Canada thistle Cirsium arvense Asteraceae Aster Family 12 Bull thistle Cirsium vulgare Asteraceae Aster Family 13 Horseweed Conyza canadensis Asteraceae Aster Family 14 Common catsear Hypochoeris radicata Asteraceae Aster Family 15 Prickly le uce Lactuca serriola Asteraceae Aster Family 16 Common groundsel Senecio vulgaris Asteraceae Aster Family 17 Dandelion Taraxacum officinale Asteraceae Aster Family 18 Mouseear cress Arabidopsis thaliana Brassicaceae Mustard Family 19 Yellow rocket Barbarea vulgaris Brassicaceae Mustard Family 20 Shepherd's purse Capsella bursa pastoris Brassicaceae Mustard Family 21 Hairy bi ercress Cardamine hirsuta Brassicaceae Mustard Family 22 Whitlowgrass Draba verna Brassicaceae Mustard Family 23 Virginia pepperweed Lepidium virginicum Brassicaceae Mustard Family 24 Pennycress Thlaspi arvense Brassicaceae Mustard Family 25 Venus looking glass Tridanis perfoliata Campanulaceae Bellflower Family 26 Mouseear chickweed Ceras um vulgatum Caryophyllaceae Pink Family 27 Jagged chickweed Holosteum umbellatum Caryophyllaceae Pink Family 28 Common chickweed Stellaria media Caryophyllaceae Pink Family 29 Knawel Scleranthus annuus Caryophyllaceae Pink Family 30 Yellow flowered vetch Vicia grandiflora Fabaceae Pea Family 31 Common vetch Vicia sa va Fabaceae Pea Family 32 Redstem filaree Erodium cicutarium Geraniaceae Geranium Family 33 Smallflower geranium Geranium pusillum Geraniaceae Geranium Family 34 Carolina geranium Geranium carolinianum Geraniaceae Geranium Family 34 Henbit Lamium amplexicaule Lamiaceae Mint Family 35 Purple deadne le Lamium purpureum Lamiaceae Mint Family 36 Cutleaf eveningprimrose Oenothera laciniata Onagraceae Eveningprimrose Family 37 Yellow woodsorrel Oxalis stricta Oxalidaceae Woodsorrel Family 38 Curly dock Rumex crispus Polygonaceae Smartweed Family 39 Catchweed bedstraw Galium aparine Rubiaceae Madder Family 40 Corn speedwell Veronica arvensis Scrophulariaceae Figwort Family 41 Ivyleaf speedwell Veronica hederifolia Scrophulariaceae Figwort Family 42 Purslane speedwell Veronica peregrine Scrophulariaceae Figwort Family 43 Field pansy Viola arvensis Violaceae Violet Family 44
Wild garlic Allium vineale Perennial Liliaceae (Lily Family) 2
Star of Bethlehem Ornithogalum umbellatum Perennial Liliaceae (Lily Family) 3
Bulbous oatgrass Arrhenatherum ela us Perennial Poaceae (Grass Family) 4
Downy brome (Cheatgrass) Bromus tectorum Annual Poaceae (Grass Family) 5
Italian ryegrass Lolium mul florum Annual Poaceae (Grass Family) Synonyms: Annual ryegrass 6
Annual bluegrass Poa annua Annual Poaceae (Grass Family) 7
Roughstalk bluegrass Poa trivialis Perennial Poaceae (Grass Family) 8
Wild carrot (Queen Anne's Lace) Daucus carota Biennial Apiaceae (Carrot Family) 9
Mayweed chamomile Anthemis cotula Annual Asteraceae (Aster Family) 10
Cornflower Centaurea cyanus Annual Asteraceae (Aster Family) Synonyms: Bachelors bu ons 11
Canada thistle Cirsium arvense Perennial Asteraceae (Aster Family) 12
Bull thistle Cirsium vulgare Biennial Asteraceae (Aster Family) 13
Horseweed Conyza canadensis Annual Asteraceae (Aster Family) Synonyms: marestail 14
Common catsear Hypochoeris radicata Perennial Asteraceae (Aster Family) Synonyms: False dandelion 15
Prickly le uce Lactuca serriola Annual (or a biennial) Asteraceae (Aster family) 16
Common groundsel Senecio vulgaris Annual Asteraceae (Aster Family) 17
Dandelion Taraxacum officinale Perennial Asteraceae (Aster Family) 18
Mouseear cress Arabidopsis thaliana Annual Brassicaceae (Mustard Family) 19
Yellow rocket Barbarea vulgaris Annual Brassicaceae (Mustard Family) 20
Shepherd's purse Capsella bursa pastoris Annual Brassicaceae (Mustard Family) 21
Hairy bi ercress Cardamine hirsuta Annual Brassicaceae (Mustard Family) 22
Whitlowgrass Draba verna Annual Brassicaceae (Mustard Family) 23
Virginia pepperweed Lepidium virginicum Annual Brassicaceae (Mustard Family) 24
Pennycress Thlaspi arvense Annual Brassicaceae (Mustard Family) 25
Venus looking glass Triodanis perfoliata Annual Campanulaceae (Bellflower Family) 26
Mouseear chickweed Ceras um vulgatum Perennial Caryophyllaceae (Pink Family) 27
Jagged chickweed Holosteum umbellatum Annual Caryophyllaceae (Pink Family) 28
Common chickweed Stellaria media Annual Caryophyllaceae (Pink Family) 29
Knawel Scleranthus annuus Annual Caryophyllaceae (Pink Family) 30
Yellow flowered vetch Vicia grandiflora Annual Fabaceae (Pea Family) 31
Common vetch Vicia sa va Annual Fabaceae (Pea Family) 32
Redstem filaree (Storksbill) Erodium cicutarium Annual or biennial Geraniaceae (Geranium Family) 33
Smallflower geranium Geranium pusillum Biennial Geraniaceae (Geranium Family) Carolina geranium (Cranesbill) Geranium carolinianum Biennial Geraniaceae (Geranium Family) 34
Henbit Lamium amplexicaule Annual Lamiaceae (Mint Family) 35
Purple deadne le Lamium purpureum Annual Lamiaceae (Mint Family) 36
Cutleaf eveningprimrose Oenothera laciniata Annual or biennial Onagraceae (Eveningprimrose Family) 37
Yellow woodsorrel Oxalis stricta Perennial Oxalidaceae (Woodsorrel Family) 38
Curly dock Rumex crispus Perennial Polygonaceae (Smartweed Family) 39
Catchweed bedstraw Galium aparine Annual Rubiaceae (Madder Family) 40
Corn speedwell Veronica arvensis Annual Scrophulariaceae (Figwort Family) 41
Ivyleaf speedwell Veronica hederifolia Annual Scrophulariaceae (Figwort Family) 42
Purslane speedwell Veronica peregrina Annual Scrophulariaceae (Figwort Family) 43
Field violet Viola arvensis Annual Violaceae (Violet Family) Synonyms: Field pansy, Johnny jump up. 44
Resources Uva, R.H., J. C. Neal, and J.M. DiTomaso. Weeds of the Northeast. Cornell University Press, 1997. USDA/NRCS Plants Database. (2017) h ps://plants.usda.gov/java/ Photos taken by B. A. Sco, University of Delaware Research Associate Weed Science. 45