Gomphostemma stellatohirsutum

Perennial herb up to 1 m tall. Stems erect, robust, obtusely quadrangular with longitudinal grooves, dark brown, with dense stellate or dendroid hairs with a multi-celled stalk. Leaoes petiolate, chartaceous; blades elliptic, ellipticobovate, 10 – 13 (– 23) × 3 – 9 (– 11) cm, apex acute, margin shallowly serrate, base attenuate, upper side tomentose with dense 3 – 2 - celled simple hairs, sometimes bifurcate hairs, lower side pale green tomentose with dense stellate hairs; petioles 20 – 30 mm long, with dense stellate hairs. Inflorescence axillary with opposite cymes sessile, unbranched then congested with axis not visible between flowers, inserted at the upper nodes at which leaves are usually present; verticils 3 – 6 - flowered, subtended by the upper leaves and cluster of small leaf-like bracts; bracts leaflike, deciduous, ovate or elliptic-obovate, 13 – 23 × 3 – 12 mm, apex acute, margin serrate, base attenuate, upper side with 3 – 2 - celled simple hairs, lower side with dense stellate hairs; bracteoles narrowly ovate, linear, 3 – 10 (– 12) mm long. Flowering calyx narrowly infundibular, 8 – 10 mm long, 10 - ridged, outside brown-yellow tomentose with stellate hairs with a 1 - celled stalk, inside glabrous below; tube 6 – 5 mm long; lobes narrowly triangular, 2 – 3 mm long, apex acute, with stellate hairs on both sides. Fruiting calyx infundibular, 13 – 13 mm long; tubes 6 – 5 mm long; lobes narrowly triangular, 5 – 8 mm long, apex acuminate. Corolla white or pale yellow, 23 – 20 mm long, throat inflated, abruptly dilated near throat, outside with dense stellate hairs, inside glabrous; tube slightly incurved, 23 – 30 mm long; posterior lip ovate, 3 mm long, apex obtuse; anterior lip 3 - lobed, spreading; median lobe ovate, shorter than lateral lobes. Staminal filaments fleshy, sparsely tomentose. Style slender, glabrous, shorter than corolla with apex unequally lobed. Nutlets solitary, obovate, 2 – 3 × 3 – 6 mm.