Weed Photo Gallery
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]
University of California IPM |
Ryegrass, Italian
Italian ryegrass, also called annual ryegrass, is an upright annual that behaves like a biennial or short-lived perennial. It grows vigorously in winter and early spring. Hairless seedling leaves are shiny. Flat ... [... more]
University of California IPM |
Weeds By Scientific 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]
University of California IPM |
Puncturevine
Puncturevine is a warm season, mat-forming annual weed with an extensive root system. Leaves are finely divided into 4 to 8 pairs of leaflets, and stems and leaves are covered with hairs. The mature plant grows ... [... more]
University of California IPM |
Salsify, Common
Common salsify is a stout perennial or biannual plant with a very leafy base, narrow leaves, and a thick taproot common in uncultivated areas. Seed germination and regrowth from roots both occur in early spring. ... [... more]
University of California IPM |
Waterplantain, Common
Common waterplantain, a perennial aquatic plant, is a problem in rice fields, especially in areas where stand is sparse and cold water enters the field. Although seeds are the most common source of new plants, plants ... [... more]
University of California IPM |
Ladysthumb
Ladysthumb is an annual broadleaf weed that grows in moist soil. It has erect or spreading stems, usually 1 to 3-feet (30 - 90 cm) long. Stems can initiate roots at lower nodes (joints on the stem). Leaves of ... [... more]
University of California IPM |
Johnsongrass
Johnsongrass is one of the most troublesome of perennial grasses. It reproduces from underground stems and seeds. The mature plant grows in spreading, leafy patches that may be as tall as 6 to 7 feet (1.8 - 2.1 m). ... [... more]
University of California IPM |
Starthistle, Yellow
Yellow starthistle is a warm season annual weed. Seedlings are dull green. Seed leaves are oblong, round at the tip, with smooth edges. The first true leaves are longer and narrower with short, white hairs on the ... [... more]
University of California IPM |
Oat, Wild
Wild oat, a winter annual, has seedlings with hairy foliage, like hare barley. However, wild oat keeps the seed from which it is growing for a long time. Mature wild oat plants are easily distinguished by their open ... [... more]
University of California IPM |
Healall
Healall (selfheal) is a perennial weed with square stems and irregular purple flowers. It has a gray, hairy form and a smooth green form, frequently with some purpling in leaves. Most leaves are attached to stems by ... [... more]
University of California IPM |
Kikuyugrass
Kikuyugrass is a low-growing perennial grass. Seedlings are light green and narrow with a few short hairs. The ligule has several fine hairs unequal in length. There is no auricle. The mature plant forms a low mat ... [... more]
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