Trees or shrubs; stipules interpetiolar, linear, adjacent
stipules from opposite leaves connate or coherent, the 2 pairs
at each node conduplicate and equitant over apical bud,
caducous; petiole eglandular; lamina mostly bearing several–many
glands in abaxial surface. Inflorescence terminal, mostly
unbranched, a raceme of short 2–5-flowered cincinni; bracts and
bracteoles persistent, the lowest bracteole and alternate
subsequent bracteoles bearing 1 large eccentric abaxial gland;
pedicel circinate in bud. Sepals leaving outermost petal exposed
in enlarging bud, all biglandular; corolla without a plane of
symmetry; petals white or lateral petals white and posterior
petal yellow, glabrous or bearing a tuft of hairs abaxially at
base of claw; limb of outermost petal conical-galeiform, the
other 4 flat or crumpled; posterior petal bearing several
marginal glands on proximal half, distally eglandular and
entire; lateral petals with margin entire; androecium radially
symmetrical; stamens 10, all fertile; filaments