Medusahead (Taeniatherum caput-medusae (L.) Nevski), is a cool-season annual grass native to the Mediterranean region. In Wyoming, was previously found in Sheridan County, and this is the first time it has been identified in Converse County. Stems are wiry and slender. 2011 Steve Matson. Researchers at Oregon State University and the Agricultural … 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. Once it dominates a … Lewis Reed explains his project to control the exotic and invasive Medusa Head grass at Sycamore Grove Regional Park in Livermore, California. Medusahead is an exotic, invasive, self-pollinated winter annual grass that germinates in the fall, overwinters as a seedling, and can have multiple flushes. 2011 Steve Matson. Medusahead produces tillers but few leaves. It matures after most other annual vegetation has senesced. (Taeniatherum caput-medusae) It invades grasslands, forests, prairies, and disturbed areas such as grazed lands and fields. Elymus caput-medusae, a monocot, is an annual grass that is not native to California; it has been naturalized in the wild. 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. Invasive annual grasses, such as cheatgrass ( Bromus tectorum) and medusahead ( Taeniatherum caput-medusae), are one of the most significant stressors to rangeland ecosystems in the western U.S. Their expansion and dominance across this area are the most damaging ecosystem agents on … It is typically 6 to 20 inches tall with distinct bristly seed heads. It is sometimes confused with foxtail barley, but has awns that are longer, stiff and barbed. It's a Mediterranean grass accidentally brought to the Western U.S. in the 1880s. 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). Cal-IPC rating: High. 1961). Medusa head. 2019 Jennifer Mo. Medusahead is a winter annual native to the Mediterranean region. ture (George 1992; Lusk et al. 2019 Ron Vanderhoff. Multiple stems can emerge from the base of the plant, each producing a … Siskiyou. Medusahead is an invasive annual grass. Medusahead (Taeniatherum caput-medusae) is an invasive winter annual grass that grows 6 to 24 inches tall. 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. 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