forb

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forb

A herbaceous flowering plant exclusive of grasses and sedges, at least some of which (e.g., clover, milkweed, sunflowers) have nutritive and/or medicinal value.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

forb

any herbaceous plant other than grass.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005