Cucurbits

Summer Annual Weed Seedlings

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  • Barnyardgrass
  • Black nightshade
  • Common purslane
  • Common lambsquarters
  • Hairy nightshade
  • Junglerice
  • Little mallow (cheeseweed)
  • Redroot pigweed

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

Click on photos to enlarge
Seedling of barnyardgrass.

Barnyardgrass (Echinochloa crus-galli) Grass family;first leaf dull gray green; stem flattened, purplish; no ligule.

Black nightshade seedling.

Black nightshade
(Solanum nigrum): Nightshade family; summer annual or short-lived perennial; seed leaves oval and pointed; first true leaves spade shaped with smooth edges; lower surfaces often purple; petioles, stems, and leaves with some hairs.

Seedling of common purslane.

Common purslane (Portulaca oleracea): Purslane family; seed leaves oblong, somewhat club shaped, succulent, maroon on lower surface, and green or maroon on upper surface; young leaves smooth, succulent, oblong, green on upper surface, maroonish underneath, and broadest around leaf tip, with short petioles.

Seedling of common lambsquarters.

Common lambsquarters
(Chenopodium album): Goosefoot family; seed leaves are narrow, with nearly parallel sides; seed leaves and early true leaves dull blue green above and often purple below; young leaves have mealy appearance from coating of fine translucent granules.

Hairy nightshade seedling.

Hairy nightshade (Solanum physalifolium=Solanum sarrachoides): Nightshade family; seed leaves narrow, small, and lance shaped with very short soft hairs along edges; first true leaves with wavy edges and prominent veins.

Seedling of junglerice.

Junglerice (Echinochloa colona): Grass family; grayish, dull green first leaves; several purple bands on surface of leaf blade; no ligule, no auricle.

Little mallow.

Little mallow (Cheeseweed)
(Malva parviflora): Mallow family; seed leaves heart shaped, sometimes with red tinge; true leaves roundish with wavy, shallow-toothed margins. Generally winter annual but can also be biennial or short-term perennial.

Redroot pigweed seedlings.

Redroot pigweed
(Amaranthus retroflexus): Pigweed family; seed leaves long and narrow with red undersides; first true leaves with notched tips and much broader than seed leaves.

 

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