Gomphostemma deltodon C. Y. Wu

Herbs erect. Stems ca. 1 m tall, densely stipitate stellate tomentose. Petiole 1.8-3 cm; leaf blade elliptic to oblong, 11.5-25 × 4.7-11 cm, adaxially stellate hirtellous, abaxially densely gray-yellow stipitate stellate tomentose, hairs on veins longer, becoming tawny, base cuneate to subrotund, generally asymmetrical, margin crenate-serrate to shallowly serrate, apex obliquely subacute. Cymes axillary, in erect spike-panicles with 2-5 pairs of 1- or 2-flowered cymes, 3.5-6.5 cm, or solitary and 1- or 4-flowered; peduncle 1-3 cm; bracts ovate to oblong, 1.1-1.8 × 0.45-1 cm, reduced apically, margin remotely denticulate to subentire; bracteoles linear, 5-8 mm. Pedicel 1-2.5 mm. Calyx narrowly campanulate, ca. 9 × 4-4.5 mm, conspicuously veined, densely tawny stellate velutinous; teeth triangular, 3-3.2 × 2.6-3 mm, apically acute. Corolla purple-red, 3.5-3.7 cm; tube ca. 2 mm wide at base, apical 1/3 abruptly dilated to throat ca. 10.5 mm wide; upper lip circular, ca. 5 mm in diam.; lower lip ca. 12 × 6 mm, middle lobe obcordate, emarginate; ovary glabrous except for tawny tomentose apex. Nutlets unknown. Fl. Aug.

Yunnan.

* Tropical forests; 900-1100 m.