baccate (3 images): berrylike.

banner (7 images): the upper, generally enlarged petal of a papilionaceous flower.

barbed (6 images): bearing short, firm, retrorse points.

barbellate (4 images): diminutive of barbed.

basifixed (7 images): attached by the base.

basiscopic (2 images): toward the basal or proximal (as opposed to distal) end.

beak (12 images): a prolonged, more or less slender tip on a thicker organ such as a fruit or seed.

berry (10 images): a fleshy fruit, developed from a single pistil,.

bi-: Latin prefix, meaning two or twice.

biconvex (5 images): convex on both sides, lentil-shaped; often referring to fruit shape.

biennial (5 images): a plant that completes its life history and dies in 2 years.

bifid (14 images): apically cleft or divided into two parts or lobes (e.g., petal).

bilabiate (15 images): two-lipped.

bipartite: divided nearly to base to form two parts (e.g., leaf).

bipinnate (4 images): twice pinnate, the pinnae again pinnate.

biseriate (5 images): in two concentric series or rows (e.g, phyllaries of an involucre).

blade (4 images): the expanded part of leaf or petal.

bloom: a waxy powder covering a surface.

bole (5 images): main trunk of a tree.

bract (21 images): a specialized leaf from the axil of which a flower arises; any more or less reduced or modified leaf associated with an inflorescence; in conifers, one of the primary appendages of the cone axis, in the axils of which the ovuliferous scales are borne.

bracteole, bractlet (5 images): diminutive of bract.

bud (7 images): an undeveloped leafy shoot or flower.

bulb (15 images): a short, vertical, underground shoot that has modified leaves or thickened leaf bases developed as food storage organs.

bulbil, bulblet (6 images): diminutive of bulb.

bullate (1 image): covered with rounded projections resembling unbroken blisters.