Any plant which habitually breaks away from its roots in the autumn, and is driven by the wind, as a light, rolling mass, over the fields and prairies; as witch grass, wild indigo, Amaranthus albus, etc.
User Defined Definitions
"any plant that breaks away from its roots in autumn and is driven by the wind as a light rolling mass"
"prickly bushy Eurasian plant; a troublesome weed in central and western United States"
"bushy annual weed of central North America having greenish flowers and winged seeds"