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Lettuce
> Year-Round IPM Program > Rosette
to Heading > Summer
Annual Weeds (Central Valley)
Lettuce
Summer Annual Weeds—Central Valley
On this page
- California burclover
- Large crabgrass
- Common purslane
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- Nettleleaf goosefoot
- Prostrate pigweed
- Tumble pigweed
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See also, summer annual weeds of other
regions: Central Coast and Desert.
Use the photos below to identify
weeds in the field. Names link to more information on identification
and biology.
Click on photos to enlarge
California burclover
(Medicago
polymorpha) Pea family; winter or summer annual; seed leaves oblong;
first true leaf rounded with single leaflet; later leaves with characteristic
clover-like shape. |
Large crabgrass
(Digitaria sanguinalis): Grass family; summer annual;
first leaf blade linear to lance shaped, with stiff, jagged,
and papery ligule; hairs on margins of the collar wide; no auricles;
leaves covered with coarse hairs; leaves rolled in bud. |
Common purslane
(Portulaca oleracea): Purslane family; summer annual; 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. |
Nettleleaf
goosefoot
(Chenopodium murale): Goosefoot family; summer annual; seed leaves oblong
to narrowly lance shaped, dark green; true leaves weakly toothed, leaf surfaces,
especially lower surface, sparsely covered with tiny dotlike scales. |
Prostrate pigweed
(Amaranthus blitoides): Pigweed family; summer annual;
seed leaves narrow, pointed, 6 to 8 times longer than wide,
with magenta undersides; first true leaves broader, with shiny
upper surface and usually magenta-tinged undersides; edges somewhat
rough. |
Tumble pigweed
(Amaranthus albus): Pigweed family; summer annual; seed
leaves 3 to 5 times longer than wide, bright green on surface,
magenta on underside; first true leaves spatulate, dark green
with wavy margins, red color underneath; midrib with notched
tip and bristle at end. |
Redroot pigweed
(Amaranthus retroflexus): Pigweed family; summer annual; seed leaves long
and narrow with red undersides; first true leaves with notched tips and much
broader than seed leaves. |
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