n.
erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States
同义词：horse balmhorseweedstonerootstone-rootstone rootCollinsonia canadensis
a plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves
同义词：clearweeddead nettlePilea pumilla
Milk Sickness, the Result of Richweed Poisoning.
THE PHYTOCENOLOGY OF THE RICHWEED, ABSINTHIUM-LEAF (AMBROSIA ARTEMISIIFOLIA Z., ASTERACIA)
The toxic constituent of richweed or white snakeroot (Eupatorium Urticœfolium).–A reprint from Journal of Agricultural Research, S...
White snakeroot or richweed (Eupatorium urticæfolium) as stock-poisioning plant
White snakeroot or richweed (Eupatorium urticæfolium) as stock-poisoning plant.
Collinsonia canadensis - richweed Mint Family (Lamiaceae)
WHITE SNAKEROOT, Richweed
The Toxic Constituent o Rich-weed or White Snakeroot (Eupatoriuwi urticaefolium).
rich weed plant
Field boundary effects on the composition of a species-rich weed community in southeastern France
