Noun richweed has 2 senses
- horse balm, horseweed, stoneroot, stone-root, richweed, stone root, Collinsonia canadensis - erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States
--1 is a kind of herb, herbaceous plant
--1 is a member of Collinsonia, genus Collinsonia
- richweed, clearweed, dead nettle, Pilea pumilla - a plants of the genus Pilea having drooping green flower clusters and smooth translucent stems and leaves
--2 is a kind of nettle
--2 is a member of Pilea, genus Pilea
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