Source:
SSA
Description:
Soft herbs, annual or perennial, decumbent or erect. Leaves subsessile or petiolate, membranous, shallowly crenate. Inflorescences terminal on main and lateral branches for almost entire length of stem; branches slender, cymes panicled; flowers small, solitary (or rarely 2) in axils of minute bracteoles. Calyx campanulate, equally 5-toothed. Corolla small, bilabiate, usually blue; upper lip erect, short, subequally 4-lobed, lower lip slightly longer, patent, keel-shaped. Stamens 4, declinate, arising at mouth of corolla tube, included in lower corolla lip; filaments shortly united at base. Style slightly exceeding stamens, shortly forked at apex. Nutlets smooth. x = 7 (6) (high polyploidy).
Distribution:
Species 20, 6 in tropical Africa; 1 species: Englerastrum schweinfurthii Briq, is recorded from along the Okavango and Zambesi Rivers (Caprivi area) in Namibia.
Classification:
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