Basal:- At the base of the plant.
Basifixed:- (of anthers) Attached to the filament by the base.
Beak:- A prominent terminal projection, especially of a carpel or fruit. adj. Beaked.
Biennial:- A plant that takes two seasons to complete its life-cycle, germinating in the first year and flowering, seeding and
then dying in the second.
Bidentate:- With two teeth; doubly toothed, when marginal teeth are themselves toothed.
Bifid:- Divided at the tip in two (usually equal) parts by a median cleft.
Bifurcate:- Forked or divided into two sharp branches or prongs.
Bipartite:- Bivided almost to the base into two parts.
Bipinnate:- Doubly pinnate i.e. the primary leaflets again pinnate.
(2-pinnatisect), When divisions of a pinnatisect leaf are themselves pinnatifid or pinnatisect.
Biserrate:- Serrate, but with alternating teeth of two different sizes; or when large serrations are themselves serrate.
Bisexual:- With both stamens and ovary in the same flower - herm­aphrodite.
Bisulcate:- With two grooves.
Biternate:- Compound ternate, the ternate divisions themselves divided into threes.
Bract:- An organ, often small and scale-like, but sometimes leaf-­like, located where the flower-stalk (pedicel) joins the stem.
Bracteate:- Subtended by or beset with bracts.
Bracteole:- A bract on the secondary branches of an inflorescence.
Bullate:- With the surface of the leaf raised in blisters or puckers between the veins.
A small bulb-like organ arising in the leaf-axils of aerial stems.