Bifid, two-cleft to the middle or thereabouts.
Bilabiate, two-lipped.
Blade, the expanded portion of a leaf, petal, etc.
Bract, one of the leaves of a flower-cluster.
Bracteate, furnished with bracts.
Bractlet, a bract of the ultimate grade; as one inserted on a pedicel or ultimate flower-stalk instead of under it.
Bracteolate, having bractlets.
Bulbiferous, bearing bulbs.
Caducous, dropping off very early.
Campanulate, bell-shaped.