尖囊蝴蝶兰 jian nang hu die lan

Doritis braceana J. D. Hooker, Fl. Brit. India 6: 196. 1890; Biermannia navicularis (Z. H. Tsi ex Hashimoto) Tang & F. T. Wang ex O. Gruss & Roellke; Kingidium braceanum (J. D. Hooker) Seidenfaden; K. naviculare Z. H. Tsi ex Hashimoto.

Roots flattened, long, densely verrucose. Stems inconspicuous. Leaves 1 or 2, deciduous, rarely present, oblong-elliptic, to 2.4 × 0.8 cm, subacute. Inflorescences 1-3, from base of stem, pendulous or arching, 12-26 cm, unbranched, laxly many flowered; rachis dark green, 6-13 cm; floral bracts lanceolate, 3-5 mm, acuminate. Flowers opening widely, variable in color, sepals and petals yellow, green, or greenish bronze variously suffused pink, lip dark rose; pedicel and ovary yellowish green, 1.5-2.5 cm. Sepals obovate-oblong, 10-15 × 5-6 mm, obtuse; lateral sepals base ca. 1/2 width adnate to column foot. Petals subspatulate, 10-13 × 3-4.5 mm, base clawed, apex rounded; lip 3-lobed; lateral lobes erect, suboblong, ca. 6 × 3 mm, adaxially with a high lamella close to proximal margin, apex rounded; mid-lobe erect, elliptic, convex, 7-8 × 3-4 mm, slightly beaked, margin recurved, base with a flattened, furcate appendage; spur narrowly conic, ca. 3 mm; callus biseriate, basal callus fleshy, bifid with tips recurved and hornlike, on back wall of spur, apical callus slender, bifid, on front wall of spur becoming free at base of mid-lobe. Column cylindric, ca. 5 mm, foot ca. 2 mm; anther cap white, subglobose; stipe spatulate, ca. 3.5 mm; viscidium elliptic. Fl. May.

On tree trunks in open forests; 1100-2000 m. S and SW Yunnan [Bhutan, N Vietnam].