Botanical description
— Genus, Alstonia, R.Br.
Calyx. — Without any or with minute glands.
Corolla-tube. — Cylindrical, more or less swollen round the anthers, the lobes spreading, contorted in the bud, the throat without scales.
Ovary. — Of two distinct carpels united by the style.
Stigma. — Ovoid or conical.
Ovules. — Numerous; in about four rows in each carpel.
Fruit. — Of two long linear follicles.
Seeds. — Oblong, compressed, peltately attached, bordered with hairs of which those of each end are usually very long; albumen scanty.
Trees or tall shrubs with a milky juice.
Leaves. — In whorls of three or more, or, in a few species, opposite.
Flowers. — In terminal corymbose cymes, usually one in the axil. of each leaf of the terminal whorl.
Bracts. — Small.