Gomphostemma stellatohirsutum C.Y. Wu (1963: 128)

Bongcheewin, Bhanubong, Ingrouille, Martin J. & Paton, Alan J., 2022, A revision of Gomphostemma (Lamiaceae), Kew Bulletin 77 (1), pp. 27-92 : 68-69

21. Gomphostemma stellatohirsutum C.Y. Wu (1963: 128) ;

Li & Hedge (1992: 53).

Type: China, Yunnan, Mon-hai [Fo-hai, 21.9665°, 100.2665°], 2100 m, July 1936, Wang 55368 (holotype PE; isotype A n.v.).

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.

DISTRIBUTION. China (Yunnan). Map 6 .

SPECIMENS EXAMINED. CHINA. Yunnan. Mon-hai [Fohai], 2100 m, July 1936, Wang 55368 (holotype PE); Caiyanghe Nature Reserve [22.3333°, 101.1665°], 1320 m, 11 July 2009, Xiang 353 (KUN).

HABITAT. In hill evergreen and forest, 2100 m.

CONSERVATION STATUS. Gomphostemma stellatohirsutum is known only from the type. The?ata?eficient (??) category is applied.

PHENOLOGY. Flowering and fruiting in July.

NOTES. Gomphostemma stellatohirsutum is a distinctive species recognised by its flowering calyx indumentum of dense stellate hairs and cymes subtended by cluster of small leaflike bracts, 3 – 12 mm wide. It is morphologically similar to G. hirsutum from Sabah, both species having dark brown stems with long branched hairs.

Figures

Map 6. Distribution range of Gocphostecca stellatohirsutuc, G. sulcatuc, G. velutinuc and G. cicrocalyx.