Compilation
Tiaridium indicum

Erect annual or a few times short-lived perennial herb up to 150 cm. high. Stem quadrangular, thick, empty or pithed, woody to the base, variably hairy. Leaves alternate or subopposite; petiole 20–70(110) mm. long, pubescent, with scattered bristles; lamina 40–170 x 30–130 mm., ovate to broadly ovate or triangular-ovate, strigose by areolae and with scattered bristles, roughish or only punctate above, generally pubescent-villous, rarely tomentose or punctate and with some scattered bristles mainly on the nerves and veins below, acute at the apex, obtuse to subcordate at the base and abruptly decurrent on the petiole, often with crisped margins; secondary nerves 4–8 on each side of the midrib. Cymes long and flexuous, up to 36 cm. long when completely expanded, usually shorter, ± dense, single or sometimes in pairs, on a short terminal peduncle. Flowers sessile. Calyx lobes 1.5–3.5 mm. long, narrowly elliptic to subulate, unequal, sparsely hispid. Corolla 3.5–5.0 mm. long, hypocrateriform, pubescent outside, glabrous inside, white or rarely mauve or blue; tube 3.0–4.5 mm. long, usually longer than the calyx; lobes c. 0.6 x 1.0 mm., depressed-ovate, rounded at apex. Stamens inserted at 0.8–1.0 mm. from the base of the corolla tube; anthers 0.5–0.9 mm. long, narrowly ovate, cordate at the base, subsessile. Ovary with 4 fleshy crests, glabrous. Style 0.5 mm. long, terete, glabrous; sterile appendix hemispheric. Fruit deeply bilobed, mitre-shaped with the lobes strongly divergent, glabrous or puberulous, first divided into 2, each one c. 4 x 4 x 2.5 mm., later split into 4 nutlets, these angular, rostrate, with the surface 3-ribbed; each nutlet with 2 cavities, the distal one fertile and the proximal one empty and larger than the other.