Aristate

awned.

Articulation

a point where a discontinuity of tissue naturally takes place, without the appearance of its having been torn asunder, as where leaves fall from the stem.

Articulated

furnished with articulations.

Artificial

a term applied to some characteristic by which a plant may be distinguished or separated from others, without reference to those other circumstances by which its affinities are established.

Ascending

starting horizontally or rising obliquely from the base, curving upwards, and ultimately attaining a vertical position, as in many stems.

Attenuated

gradually diminished in breadth towards either extremity.

Auricle

a prolonged appendage at the base of some leaves.

Auriculate

having auricles or earlike appendages.

Awn

a stiff bristle-like appendage, such as may be met with on the glumes and pales of grasses.

Atoned

furnished with an awn.

Axil

the upper angle formed by the attachment of a leaf or branch to its support.

Axile

of or belonging to the axis.

Axillary

situated in an axil.

Axis

an imaginary line forming a centre round which an organ is developed.

Baccate

bearing berries.

Bark

the external coating of the stems and roots of flowering plants.

Basal

attached to another part at that extremity by which it is joined to its support.

Beak

a long slender termination.

Beaked

terminated by a beak, as the pod of the Radish.

Bearded

bearing tufts of hair-like pubescence.

Bell-shaped

having a tubular and inflated form, resembling a bell, as the corolla of many Campanulas.

Berry

a succulent seed-vessel, with the seeds embedded in pulp.

Biennial

applied to those plants which produce only leaves during the first year of their growth, and in the second bear seed, and then die.

Bifid

divided about halfway to the base into two parts.

Bilobed

divided into two lobes, as the anthers of most flowers.

Bipartite

deeply divided into two parts, the incision extending beyond the middle.

Bipinnate

having the leaflets on the secondary petioles of a doubly compound leaf arranged in a pinnate manner, the secondary petioles themselves being similarly disposed.

Bipinnatifid

having the divisions in a pinnatifid leaf themselves divided in a pinnatifid manner.

Bisaccate

having two bags or sacs.

Biternate

having the leaflets of a doubly compound leaf arranged in a ternate manner.

Bloom

a whitish, waxy secretion produced on the surface of some fruits, as in the plum.

Blunt

terminating in a rounded manner, without tapering.