Medusahead is a winter annual native to the Mediterranean region. It's a Mediterranean grass accidentally brought to the Western U.S. in the 1880s. Medusa head. 2011 Steve Matson. ture (George 1992; Lusk et al. One of the most problematic annual grass weeds in California and the western United States is medusahead, which is estimated to infest about 1 million ha in the 17 western states (Duncan and Clark 2005). (Taeniatherum caput-medusae) It invades grasslands, forests, prairies, and disturbed areas such as grazed lands and fields. Medusahead (Taeniatherum caput-medusae (L.) Nevski), is a cool-season annual grass native to the Mediterranean region. It matures after most other annual vegetation has senesced. Lewis Reed explains his project to control the exotic and invasive Medusa Head grass at Sycamore Grove Regional Park in Livermore, California. Plants grow from 8 inches to 2 feet tall, depending on the site. Medusahead produces tillers but few leaves. Medusahead is an invasive annual grass. Multiple stems can emerge from the base of the plant, each producing a … It is sometimes confused with foxtail barley, but has awns that are longer, stiff and barbed. 2011 Steve Matson. Medusahead (Taeniatherum caput-medusae) is an invasive winter annual grass that grows 6 to 24 inches tall. It is typically 6 to 20 inches tall with distinct bristly seed heads. Medusahead is an exotic, invasive, self-pollinated winter annual grass that germinates in the fall, overwinters as a seedling, and can have multiple flushes. Medusa-head grass The High Desert Chapter has been assisting the Crooked River National Grasslands of the Ochoco National Forest with a special project to help understand how to control medusa-head invasive grasses on the Grasslands. Cal-IPC rating: High. In the western United States, it decreases shrub/perennial grass ecosystems and native vegetation, shifting it to an... Reduces the value of grazing lands by more than 80%. r- Furthe more, mature medusahead seeds have long, stiff, sharp, barbedawns, which discourage seed pred a- tion. Siskiyou. Researchers at Oregon State University and the Agricultural … Due to the high silica content, particularly once seed is set (Murphy and Turner 1959), medusahead is of little value in livestock production and wildlife habitat. Like another troublesome annual grass, cheatgrass, medusahead initiates growth early in the growing season, reducing moisture for perennial grass species. In Wyoming, was previously found in Sheridan County, and this is the first time it has been identified in Converse County. 2019 Jennifer Mo. 1961). Stems are wiry and slender. Elymus caput-medusae, a monocot, is an annual grass that is not native to California; it has been naturalized in the wild. 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