Achyrospermum densiflorum Blume

Suberect herb, 10-60 cm. Stem and branches. pubescent. Leaves thin, narrowly elliptic or ovate, 6-8 by 2.5-4 cm, acute or broadly acute, base cuneate or attenuate, hirsute or pilose on both surfaces, margin serrate or crenate-dentate; petiole 0.5-6 cm, hirsute. Verticillasters always in a ter-minal, spike-like inflorescence 4-6 (or more) cm long. Bracts pale greenish yellow to pink, broadly ovate or spathulate, 6-8 mm, pilose and ciliate. Calyx campanulate, 6-8 mm long, in fruit 8-10 mm, more or less 2-lipped, the upper lip 2-toothed, slightly longer than the lower lip, the teeth straight (in fruit often slightly recurved), obtuse or rounded at apex. Corolla white to light violet or pink, 3-4 mm exceeding the calyx, upper lip erect, emarginate, lower lip much longer than the upper one, straight or decurved. Stamens in 2 pairs, the lower pair longer, exserted. Nutlets obtusely trigonous, 1.2-2 by 0.5 mm, scaly and chaffy on the ventral surfaces and on the top, rough and pubescent on the dorsal surface.

In forests often along streams and in damp, shaded places at low and medium altitudes from c. 500 to 2000 m, rarely reported down to 150 m confined to everwet climatic conditions. Fl. Febr.-Sept.