Purslane, Common
Common purslane is an annual that grows rapidly in spring and summer. It thrives under dry conditions but also competes well in irrigated situations. Plants prefer loose, nutrient-rich, sandy soil. The mature plant ... [... more]
University of California IPM |
Pineapple-Weed
Pineapple-weed is a very common summer annual weed. Mature pineapple-weed is 3 to 12 inches (7.5 - 30 cm) high. The small, yellowish green flowers at the ends of stems do not have showy petals. The foliage of ... [... more]
University of California IPM |
Radish, Wild
Wild radish occurs throughout California. Seed leaves are broad with a deep notch at the tip. The first true leaves are irregularly lobed and may have separate lobes at the base of the leaf blade. Seedlings resemble ... [... more]
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Pearlwort, Birdseye
Birdseye pearlwort, a perennial, has prostrate stems which form a mat rooting at the nodes. Plants resemble moss. Leaves are linear; the upper leaf surface is mostly smooth. Leaves are opposite and may appear whorled ... [... more]
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Fiddlenecks
Fiddlenecks are hairy, single or few-stemmed winter annuals that form distinctive flowering heads curled like the neck of a fiddle. They are toxic to animals. Seedlings have "Y" shaped cotyledons with tiny blisters ... [... more]
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Sunflowers
Sunflowers are large, rough, hairy broadleaf plants with large yellow compound flowers. They may be summer annuals or perennials and have single or branched stems, depending on species. Seedling seed leaves are ... [... more]
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Spurge, Petty
Petty spurge is a smooth, erect, yellow-green plant up to 7 inches (17.5 cm) tall. A whitish, reportedly toxic, fluid exudes when stems are broken. Lower leaves are up to 1 inch (2.5 cm) long, ovate or round, and ... [... more]
University of California IPM |
Stickleaf
Stickleaf, a broadleaf annual, is found in sandy or rocky soils. Seedlings have characteristic stalkless, long, narrow, wavy-edged leaves. The mature plant, 3 to 19 inches (7.5 - 47.5 cm) tall, has a basal rosette of ... [... more]
University of California IPM |
Velvetgrass, German
German velvetgrass, also called Yorkshire fog, is a perennial with vigorous, slender rhizomes. A short, membranous ligule is present and there are no auricles. Leaves are velvety and somewhat grayish. Purplish lines ... [... more]
University of California IPM |
Crabgrasses
Large crabgrass, D. sanguinalis, is a widely distributed annual that germinates throughout the summer. Seedlings sprout quickly, forming a clump with extensive roots where soil is moist. Once established, it is ... [... more]
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Shepherd's-Purse
Shepherd's-purse is a cool season annual weed, but may grow all year in cool coastal areas of California. Seed leaves are pale green with tiny granules on the surface. The first true leaves have smooth margins, but ... [... more]
University of California IPM |
Weeds By Family Name
The UC IPM Weed Photo Gallery includes many, but not all, weed species commonly found in California farms and landscapes. Additional species will be added over time. Acknowledgments ... [... more]
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