Perennial Weeds

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  • Field bindweed
  • Purple nutsedge
  • Silverleaf nightshade
  • Yellow nutsedge
Names link to more information on biology and management. Click on photos to enlarge.
Seedling of field bindweed.

Field bindweed (Convolvulus arvensis): Morningglory family. Most new shoots and seedlings emerge in spring. Seed leaves nearly square, with shallow notch at tip; early true leaves spade shaped; leaf stalks flattened.

Tubers and rhizomes of purple nutsedge, Cyperus rotundus.

Purple Nutsedge (Cyperus rotundus): Sedge family. Young plant or young shoot is somewhat stiff, upright, and light green with a fairly prominent whitish midvein; no auricle or ligule; triangular stem solid or pithy and rarely hollow as in grasses. Seedling has 2 to 3 newly emerged leaves with smooth, membranous, linear blades folded lengthwise; sheaths tubular.

Seedling of silverleaf nightshade, Solanum elaeagnifolium, at the one-leaf stage.

Silverleaf nightshade (Solanum elaeagnifolium): Nightshade family. Seed leaves 5 times longer than wide and gray green; first true leaves with wavy margins, covered with small star-shaped hairs.

Seedling of yellow nutsedge, yellow nutgrass.
Yellow nutsedge
(Cyperus esculentus): Sedge family. Grasslike; light green blades, flat, slender; leaf tip long and drawn out; nutlets globe shaped, smooth, and almond flavored.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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