Shrubs [trees], armed, stipules spinescent. Stems ascending, twigs glabrous or puberulent, resting buds absent, short shoots absent. Leaves alternate, even-bipinnate, not sensitive to touch; stipules present; petiolate, petiole with extrafloral nectaries; pinnae (3–)4–6 pairs, opposite, extrafloral nectary present between distalmost 1 or 2 pair(s); leaflets (22–)30, opposite, blade margins entire, venation brochidodromous, surfaces glabrous or glabrate. Inflorescences 14-flowered, axillary, heads, sometimes forming pseudoracemes; bracts present. Flowers mimosoid, actinomorphic, homomorphic; calyx campanulate, lobes 5 or 6, calyx and corolla connate, valvate; corolla greenish; stamens 25–30[–50], monadelphous, connate into a tube; anthers dorsifixed. Fruits legumes, usually stipitate, laterally compressed, straight, broadly linear-oblong in outline, dehiscing along margin, glabrous; not constricted between seeds, undulate above seeds. Seeds (8–)10–15, flattened, oblong to circular in outline; pleurogram present, aril absent. x = 13.

Distribution

Texas, Mexico, Central America, South America.

Discussion

Species ca. 11 (1 in the flora).

Selected References

None.

Lower Taxa

Havardia pallens