Names link to more information on biology and management. Click on photos to enlarge.
(Sonchus oleraceus): Sunflower family. Summer or winter annual. Seed leaves markedly stalked, almost spoon-shaped, rounded at tip and often have grayish powdery bloom. Injured tissue bleeds milky white latex.
(Senecio vulgaris): Sunflower family. Seedlings can be present any time of year at cool, moist locations. Seed leaves narrow with blunt narrow tip; first true leaves with shallow teeth; third and fourth leaves more deeply lobed.
(Urtica urens): Nettle family. Wnter or summer annual. Rrounded seed leaves with smooth margin and small notch at tip; first true leaves with small notch at tip, opposite, stalked, and distinctly toothed.
Little mallow (Cheeseweed)
(Malva parviflora): Mallow family. Seed leaves heart-shaped, sometimes with red tinge; true leaves roundish with wavy, shallow-toothed margins.
(Capsella bursa-pastoris): Mustard family. 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.
(Sisymbrium irio): Mustard family. Seedlings narrow with long stalks; first true leaf oval, margins smooth or with a few weak teeth; subsequent few leaves similar but with shallow-toothed margins; young plants have deeply lobed leaves.
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November 30, 2012.