Burning nettle
(Urtica urens): Nettle family; winter or summer annual; rounded seed leaves
with smooth margin and small notch at tip; first true leaves with small notch
at tip, opposite, stalked, and distinctly toothed.
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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.
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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. |
Mustards
(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. |
Prickly lettuce
(Lactuca serriola): Sunflower family; winter annual or biennial; seed
leaves about 2 times longer than wide; first true leaves with rounded margins. |
Shepherd's-purse
(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. |
Sowthistle
(Sonchus spp.): Sunflower family; summer annual; seed leaves markedly
stalked, almost spoon-shaped, rounded at tip and often have grayish powdery bloom. |
Tall annual willowherb
(Epibolium brachycarpum): Primrose family; summer annual; seed leaves
small, round, often dark reddish- green; true leaves narrow, 4 to 5 times longer
than wide, first true leaves opposite and smooth around edges. |
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