link to more information on identification and biology.
Click on photos to enlarge
(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.
(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.
(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
(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 (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)
(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
(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
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.
(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
(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.