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Potato

Winter Annual Weed Seedlings

On this page
  • London rocket
  • Sheperd's-purse
  • Little mallow
  • Mustards
  • Tumble mustard

Use the photos below to identify weeds in the field. Names link to information on identification and biology.

Click on photos to enlarge
Seedling of London 
				rocket, Sisymbrium irio, at the four-leaf stage.
London rocket
(Sisymbrium irio): Mustard family; winter annual; 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.
Shepherd's-purse seedling.
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.
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.
Mustard 
				seedling.
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.
Tumble mustard
Tumble mustard
(Sisymbrium altissimum): Mustard family; winter or summer annual, sometimes biennial; seed leaves oval to oblong, smooth, on short stalks; first true leaves oblong to elliptical, bristly-hairy, margin smooth or with a few weak teeth, base tapered to broad stalk; subsequent leaves increasingly larger with shallow-toothed margins.
 

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