Bermudagrass Johnsongrass Medusahead Quackgrass Field Bindweed Hoary Cress Diffuse Knapweed Russian Knapweed Spotted Knapweed Squarrose Knapweed Purple Loosestrife Perennial Pepperweed Leafy Spurge Yellow Starthsitle Canada Thistle Musk Thistle Scotch Thistle Dyer's Woad Back to main weeds page   Medusahead Taeniatherum caput-medusae   Seedling Leaf blades are about one-eighth inch wide. Adult Medusahead is an annual growing from six inches to two feet high. Flowering and seed production take place in late spring and early summer. Seedhead It is sometimes confused with foxtail barley or squirreltail, but is different in that the seedhead doesn't break apart completely as the seeds mature. Weed Infestation Medusahead was brought to the United States from Eurasia. It is extremely competitive completely displacing other desirable grass species. It spreads by seed commonly carried by wind, animals, clothing, and vehicles. Twisted Awns Awns of the seedhead are long and become twisted as the seed matures. Back to main weeds page   Buffalobur Common Burdock Camelthorn Goatsrue Jointed Goatgrass Poison Hemlock Black Henbane Houndstongue Blue-Flowering Lettuce Western Whorled Milkweed Silverleaf Nightshade Yellow Nutsedge Puncturevine Russian-Olive Saltcedar St. Johnswort Bull Thistle Dalmatian Toadflax Yellow Toadflax Velvetleaf