Pholidota subcalceata Gagnepain

Li, Lin, Qin, Min, Wang, Wan-Yao, Zeng, Song-Jun, Zhang, Guo-Qiang & Liu, Zhong-Jian, 2019, The taxonomic identities of Pholidota wenshanica and P. subcalceata (Orchidaceae, Coelogyninae), PhytoKeys 136, pp. 97-106 : 97

Pholidota subcalceata Gagnepain

Pholidota subcalceata Gagnepain, Bull. Mus. Natl. Hist. Nat., sér. 2, 22: 508, 1950.

Type.

Vietnam. Annam, North Kon Tum, near Moi village, at 1000-1500 m alt., 25 Nov. 1941, M. Poilane 32058 (holotype P! Isotype P!). Fig. 1 . Emended description Epiphytic or occasionally terrestrial plants with short and stout rhizomes, up to 1 m high. Pseudobulbs borne close together, narrowly ovoid to broadly fusiform, often longitudinally sulcate, 1.5-3.5 cm × 8-15 mm, ca. 2 cm in diam., basally usually enveloped by scarious sheaths. Leaves 2 per pseudobulb, arising from pseudobulb apex, linear to linear-lanceolate, 15-30 × 1-2.5 cm, somewhat coriaceous, base contracted into a distinct petiole, apex short acuminate, lamina dark green to bluish green; petiole 4-8 cm. Inflorescence arising from rather young pseudobulbs with just developing very young leaves, synanthous, often pendulous, ca. 23 cm long; peduncle 4-8 cm long; rachis almost straight or weakly zig-zag, laxly 18-25-flowered; floral bracts deciduous, broadly ovate-rhombic, 9 × 10 mm, paperaceous. Flowers white or slightly tinged with pink, ca. 5 mm in diam., lip white, tinged with pinkish yellow or yellow blotches, anther pink; stigma red; pedicel and ovary 3-4 mm. Sepals broadly ovate-elliptic, 5-7 × 4-6 mm, 7-veined, acute; lateral sepals dorsally carinate. Petals ovate-elliptic, 4-5 × 2.5-3 mm, 3-5-veined, obtuse; lip subpandurate when flattened, 5 × 3-4 mm, trilobed, with prominent lateral lobes; hypochile deeply saccated, with 3 thickened veins; epichile reniform-obicular, 4-5 mm wide, apex emarginate and truncate-subbilobed, slightly undulate margined. Column 3 mm, apex broadly winged; stelidia short and rounded, with obtuse teeth along the upper margin; anther broadly elliptic in outline, top convex and rounded; pollinia 4 in 2 pairs; stigma transversally reniform. Flowering in March and April. Capsule not seen.

Distribution and habitat.

Pholidota subcalceata is endemic to the Central Highlands of southern Vietnam, north to Kon Tum, south to Lam Dong, where it grows as epiphyte on old trees in montane broadleaved forest in open areas and along streams, and occasionally grows as terrestrial herb, with elevations ranging from 1000-1800 m a.s.l.

Additional specimens examined.

Vietnam. Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city, 12°08'N, 108°39'E, at 1450 m alt., 19 Mar. 1997, L.V. Averyanov, N.Q. Binh & P.K. Loc, VH 2897 (P). Vietnam. Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 35 km to NE from Dalat city, 12°09'N, 108°41'E, at 1700-1800 m alt., 7 Apri. 1997, L.V. Averyanov, N.Q. Binh & P.K. Loc, VH 3753 (P). Vietnam. Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 26-28 km to NE from Dalat city, 12°07'N, 108°36'E, at 1500-1700 m alt., 4 Oct. 1997, L.V. Averyanov, N.Q. Binh & P.K. Loc, VH 3842 (P). Vietnam. Prov. Kon Tum, NW slopes of Ngoc Linh mountain system, at 1600 m alt., 23 Feb. 1995, L.V. Averyanov & al., VH 290 (P); L.V. Averyanov & al., VH 291 (P); L.V. Averyanov & al., VH 292 (P); L.V. Averyanov & al., VH 294 (P);

Figures

Figure 1. The types and selected specimens of P. wenshanica (A-C), Pholidota leveilleana (D-F) and P. subcalceata (G-I) A holotype sheet of P. wenshanica B China, Guangxi, Longzhou, HK Kadoorie PT 714 (PE) C China, Yunnan, HK Kadoorie Team 2361 (PE) D holotype sheet of P. leveilleana E China, Guangxi, China-UK Expedition Team ASBK 365 (IBK) F China, Guangxi, Y. S. Huang Y 1229 (IBK) G Holotype sheet of P. subcalceata H isotype sheet of P. subcalceata I Vietnam, Kontum, L. V. Averyanov & al., VH 292 (P).