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FOC | Family List | FOC Vol. 25 | Orchidaceae | Gastrochilus

8. Gastrochilus japonicus (Makino) Schlechter, Repert. Spec. Nov. Regni Veg. 12: 315. 1913.

黄松盆距兰 huang song pen ju lan

Saccolabium japonicum Makino, Ill. Fl. Japan 1(7): 3, t. 13. 1891; Gastrochilus holttumianus S. Y. Hu & Barretto; G. somae (Hayata) Hayata; S. somae Hayata; S. taiwanianum S. S. Ying (1977), not (Hayata) Tang & F. T. Wang (1951).

Stems ascending or pendulous, 2-10 cm, 3-5 mm in diam. Leaves distichous, closely spaced; blade ± falcate, linear-oblong, or linear-lanceolate, 5-14 × 1-2.5 cm, fleshy, apex subacute and slightly hooked. Inflorescence subumbellate, 4-7(-10)-flowered; peduncle 1.5-2 cm; floral bracts ovate-triangular, 2-3 mm, apex acute; pedicel and ovary 10-12 mm. Flowers widely opening; sepals and petals yellowish green, with purplish red spots; lip whitish, tinged with yellow at apex of epichile and with yellow and purple-spotted cushion. Sepals similar, obovate-elliptic or subelliptic, 5-9 × 3-5 mm, apex obtuse. Petals similar to sepals, slightly narrower, apex obtuse; lip with an epichile and a saccate hypochile; epichile subtriangular, 2-4 × 5-8 mm, adaxially glabrous except on finely papillate central cushion, margin erose or nearly entire; hypochile cupular, laterally compressed, 5-7 mm tall, 4-6 mm in diam. Column pale purple, short. Fl. Jun-Sep. 2n = 30, 38, 40.

On tree trunks in forests; 200-1500 m. Hong Kong, Taiwan [Japan (Ryukyu Islands)].


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