[mass noun](N. Amer. & Austral.)a plant of arid regions which breaks off near the ground in late summer, forming light globular masses which are tumbled about by the wind (北美,澳)风滚草;丝石竹;苋属植物
Genera Salsola (family Chenopodiaceae) and Amaranthus (family Amaranthaceae) 猪毛菜属(藜科)及苋属(苋科)