Habenaria diplonema Schltr., Notes Roy. Bot. Gard. Edinburgh 5: 100. 1912.

Pandey, Tirtha Raj & Jin, Xiao-Hua, 2021, Taxonomic revision of Habenaria josephi group (sect. Diphyllae s. l.) in the Pan-Himalaya, PhytoKeys 175, pp. 109-136 : 109

2. Habenaria diplonema Schltr., Notes Roy. Bot. Gard. Edinburgh 5: 100. 1912.

Type.

China, Yunnan, 3300-3600 m elev., 1906. G. Forrest 2812 [holotype: E (E00381985 image!); isotypes: IBSC (0635875!), CAL (CAL0000000748!), P (P00426408 image!)] .

Description.

Terrestrial herbs, 4-15 cm tall. Tubers globose-oblong. Stems densely papillate-pubescent. Leaves 2, opposite, basal; sheathing at base; leaf blade ovate to orbicular, 1-2.4 cm long, 1-2.2 cm broad, adaxially with yellowish-white venation, densely papillate, apex acute to acuminate. Inflorescence 3-12 cm long, sparsely 2-14-flowered; rachis 2-5.5 cm long, pubescent; floral bracts lanceolate, 3-6 mm long, apex acuminate. Flowers green, faintly fragrant; ovary and pedicel curved, 6-8 mm long, pubescent. Dorsal sepal broadly ovate, ca. 3.5 mm long, ca. 3 mm broad, glabrous, apex obtuse; lateral sepals oblique, ovate-elliptic, deflexed, ca. 4 mm long, ca. 2.5 mm broad, glabrous, apex obtuse. Petals obliquely falcate-ovate, ca. 3.5 mm long, 2-2.5 mm broad, glabrous, entire; lip 3-lobed, spurred; lateral lobes filiform, ca. 10 mm long; mid-lobe linear-lingulate, ca. 3 mm long; spur pendulous, clavate, 1-4 mm long. Column short; anther apex retuse; caudicles short; stigma processes clavate. (Fig. 6 ).

Phenology.

Flowering from July to September.

Habitat.

Shady cliffs and rocks; 2700-4300 m elev.

Distribution.

S Hengduan; also in N Fujian of China. (Fig. 7 ).

More illustrations.

Wu et al. (2010, fig. 192, 7-9).

Additional specimens examined.

S. HENGDUAN: Muli, Rangetzantze, 3500 m elev., 1937, T.T. Yü 14014 (KUN, PE); Yulong (Lijiang), 2800 m elev., 1935, C.W. Wang 70748 (PE, KUN); Yulong (Lijiang), 4200 m elev., 1914, C. Schneider 2459 (K).

Note.

The photograph of the type specimen housed at the herbarium of Royal Botanic Garden Edinburgh (G. Forrest 2812, E00381985) was published along with the protologue, therefore this specimen is the holotype (Art. 9.1, Note 1 (b), Turland et al. 2018).

Figures

Figure 6. Habenaria diplonema A habit B floral bract C pedicellate ovary with spur D petal E dorsal sepal F lateral sepal G lip (A photographed from T. T. Yu 14014, PE B-G drawn from the same specimen by T. R. Pandey).

Figure 7. Distribution of Habenaria diplonema (black circles) in the Pan-Himalaya.