Bisexual, having both stamens and pistil.
Biternate, twice ternate; i. e. principal divisions three, each bearing three leaflets, [59].
Bladdery, thin and inflated.
Blade of a leaf, its expanded portion, [49].
Bloom, the whitish powder on some fruits, leaves, &c.
Boat-shaped, concave within and keeled without, in shape like a small boat.
Border of corolla, &c., [89].
Brachiate, with opposite branches at right angles to each other.
Brachy-, short, as Brachycarpous, short-fruited, &c.
Bract (Bractea), the leaf of an inflorescence. Specially, the bract is the small leaf or scale from the axil of which a flower or its pedicel proceeds, [73].