Compilation
Ammannia glauca

Glabrous annual, 4–18 in. high. Stem erect, terete at base, with long quadrangular spreading branches. Leaves lanceolate, narrowing gently from above middle towards base, sessile, sometimes auricled at base, not amplexicaul, opposite, patent at the flowering parts deflected at the fruiting parts, 1-veined, 1/2–1 1/2 in. long. Flowers in axillary sessile cymes with very short pedicels, densely verticilled especially in fruit, 4–9 in each axil. Calyx with a short four-cornered spreading limb at top of a tube campanulate in flower and hemispherical in fruit; lobes of calyx 4, deltoid, incurved in flower, usually with short patent cornua. Petals wanting or caducous. Stamens 4, not exceeding the calyx, arising from near the base of its tube. Ovary when young obovoid, with 4 external longitudinal lines; style very short. Capsule 1-celled. Seeds attached to a placenta which in middle of capsule is compressed horizontally in a peltate manner and at top and bottom consists of a central axis, somewhat triangular in outline, concave, very minutely punctate.