Nettle, Burning
Burning nettle is a winter annual in interior valleys but grows throughout the year on the California coast. It has entire, rounded seed leaves with a small notch at the tip. The first true leaves are opposite, ... [... more]
University of California IPM |
Goosegrass
Goosegrass, also called wiregrass, is an annual that grows as a compressed plant in turf. It appears as a whitish silvery mat, forming a pale green clump with flattened stems in a low rosette. Leaves have a short ... [... more]
University of California IPM |
Brome, Ripgut
Ripgut brome, an annual that occurs throughout California, has a tubular sheath on the seedling, distinguishing it from most other grass seedlings. Soft hairs cover the blades and sheaths. The membranous ligule is ... [... more]
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Speedwell, Persian
Persian speedwell, also called birdseye speedwell, is an annual with roundish or oval leaves on stems, 4 to 16 inches (10 - 40 cm) long. Upper leaves are arranged alternately along the stem; lower leaves are arranged ... [... more]
University of California IPM |
Fescue, Tall
Tall fescue, a perennial, forms clumps with upright leaves. Leaf blades are wide, coarse with rasplike margins and prominent veins, and radiate from a central clump. Flower stalks lie flat during mowing, resulting in ... [... more]
University of California IPM |
Cudweeds
Cudweed is a sparsely branching annual. Some plants will survive into the second year to mature, thereby behaving as a biennial. The seed leaves as well as the first true leaves are covered with whitish to light gray ... [... more]
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Bindweed, Field
Field bindweed is a perennial weed that spreads from an extensive rootstock as well as from seed. Seed leaves are nearly square with a shallow notch at the tip. Plants sprouting from rhizomes lack seed leaves. Early ... [... more]
University of California IPM |
Thistle, Russian
Russian thistle, a common annual broadleaved weed in the goosefoot family, is found in saline areas. It occurs throughout the western states, usually more often in drier areas. The cotyledons and first true leaves ... [... more]
University of California IPM |
Spurge, Spotted
Spotted spurge is a low-growing summer annual plant that often forms a dense mat. The oval seed leaves are bluish green, powdery, or mealy on the upper surface and have a reddish tinge underneath. Leaves on mature ... [... more]
University of California IPM |
Junglerice
Junglerice, a summer annual grass, is 2 to 3 feet (60 - 90 cm) tall. Widely distributed throughout California, it infests all summer annual crops and waste areas. Seedling leaves are grayish or dull green. It is ... [... more]
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Nightshade, Hairy
Most of the common nightshades are annuals. The worst of the nightshades are black nightshade (S. nigrum ) and hairy nightshade (S. sarrachoides). First true leaves of hairy nightshade have wavy edges and prominent ... [... more]
University of California IPM |
Datura, Sacred
Sacred datura, also known as tolguacha, is a native perennial in dry, sandy, or gravelly soils of agricultural and noncropped areas. It is becoming more prevalent because of its resistance to herbicides. This plant ... [... more]
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