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Winter Annual Weed Seedlings

On this page
  • Annual bluegrass
  • Common groundsel
  • Whitestem filaree
  • Redstem filarree
  • Little mallow
  • Poison hemlock
  • Italian ryegrass
  • Thymeleaf speedwell
  • Sheperd's-purse
  • Mustards

Names link to more information on identification and biology.

Click on photos to enlarge
Annual bluegrass seedling.
Annual bluegrass
(Poa annua): Grass family; winter annual; leaf tip shaped like bow of a boat; membranous ligule rounded with slightly pointed tip; leaf blade crinkled at midsection.
Seedling of common 
				groundsel, Senecio vulgaris.
Common groundsel
(Senecio vulgaris): Sunflower family; winter annual; seed leaves narrow, with blunt narrow tip; first true leaves with shallow teeth; third and fourth leaves more deeply lobed.
				filaree seedling.
Whitestem filaree
(Erodium moschatum): Geranium family; winter annual or biennial; seed leaves 3 to 4 lobed, center lobe largest; true leaves arranged as opposite or alternate; leaves and stems bristly and hairy.
Seedling of redstem 
				filaree, Erodium cicutarium, at the two-leaf stage.
Redstem filaree
(Erodium circutarium): Geranium family; winter annual; seed leaves deeply 3 to 4 lobed, center lobe largest; first true leaf deeply lobed and covered with white hairs; young leaves alternate or opposite and also deeply lobed.
Little mallow, Malva 
				parviflora, seedling.
Little mallow (Cheeseweed)
(Malva parviflora): Mallow family; winter annual; seed leaves heart shaped, sometimes with red tinge; true leaves roundish with wavy, shallow-toothed margins. (prevalent due to Round-Up resistance)
Poison Hemlock
Poison hemlock
(Conium maculatum): Carrot family; biennial; seed leaves light green, 3 to 5 times longer than wide with prominent veins underneath; first true leaves smooth and deeply cut 2 to 3 times like a parsley leaf; when crushed, has a parsniplike odor.

				varnished appearance of ryegrass seedlings.
Italian ryegrass
(Lolium multiflorum): Grass family; winter annual; first blade erect, long, and narrow; leaves rolled in bud, blades with shiny, varnished appearance; ligule membranous; usually auricles present, but sometimes absent on very young seedlings.

Thymeleaf speedwell
Thymeleaf speedwell (Veronica serpyllifolia): Figwort family; perennial; seed leaves spatulate to oblong; first true leaves opposite, entire, sessile, and lack hairs; older leaves can be more elliptic or ovate in shape and regularly dentate.
Shepherd's-purse seedling.
(Capsella bursa-pastoris): Mustard family; winter annual; seed leaves pale green with tiny granules on surface; first true leaves with smooth margins; fourth and later leaves may be indented; true leaves covered with star-shaped hairs.
(Brassica spp.): Mustard family; winter annual; all mustard seedlings with broad seed leaves and deep notch at tip; first true leaves bright green on the upper surface and paler below.

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