tumbleweed

n 1: any plant that breaks away from its roots in autumn and is

driven by the wind as a light rolling mass

2: prickly bushy Eurasian plant; a troublesome weed in central

and western United States [syn: {Russian thistle}, {Russian

tumbleweed}, {Russian cactus}, {Salsola kali tenuifolia}]

3: bushy annual weed of central North America having greenish

flowers and winged seeds [syn: {winged pigweed}, {Cycloloma

atriplicifolium}]