滇南盆距兰（云南植物研究）
Gastrochilus platycalcaratus (Rolfe) Schltr. in Fedde Repert. Sp. Nov. Beih. 4: 287. 1919; Holttum in Orch. Rev. 70: 326. 1962; Z. H. Tsi in Guihaia 16 (2): 137. 1996; Z. H. Tsi, S. C. Chen et K. Mori, Wild Orch. China: 101, pl. 193. 1997. ——Saccolabium platycalcaratus Rolfe in Kew Bull.: 368. 1909. ——Gastrochilus diannanensis Z. H. Tsi et Y C. Ma in Acta Bot. Yunnan. 7 (1.): 85. 1985.
On tree trunks in dense forests; 700-800 m. S Yunnan [Myanmar, Thailand]. This species is easily distinguished from other species of the genus in terms of its elongated raceme and strong dorsal ventral compression below the middle of the posterior lip and concave end, and narrow front end of the cap.
|
| |
Stems ca. 5 cm, ca. 4 mm in diam. |
| |
Leaves 3-6, nearly basal; blade green, tinged with purplish red, oblong, 3-5 × 0.7-1.2 cm, obtuse and unequally bilobed. |
| |
Inflorescence racemose, to 9-flowered; peduncle pale yellowish green, usually 1.5-2 cm, upper part enlarged; rachis ca. 5 mm; floral bracts ovate-triangular, obtuse; pedicel and ovary yellowish green with purple spots, ca. 8 mm. Flowers widely opening; sepals and petals yellowish green, sometimes with purplish red spots; lip whitish, ± with purple-blackish spots on hypochile and greenish cushion on epichile. Dorsal sepal oblong, concave, ca. 3 × 1.5 mm, apex obtuse; lateral sepals slightly oblique, oblong, ca. 3 × 1 mm, apex obtuse. Petals ovate-elliptic, ca. 3 × 2 mm, apex obtuse; lip with an epichile and a hypochile; epichile triangular-ovate, ca. 3 × 3 mm, adaxially densely hirsute and with a central cushion, slightly reflexed, rounded at apex; hypochile subconic, ca. 4 mm tall, ca. 1.8 mm in diam., slightly narrowed at middle, strongly dorsiventrally compressed from middle to tip, subtruncate and concave at tip. Column pale yellow, tinged with purplish blue, short; anther cap yellow. Fl. Mar. |
| |
| ||
| ||
|
| |
