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

80. Bulbophyllum longibrachiatum Z. H. Tsi, Bull. Bot. Res., Harbin. 1(1-2): 115. 1981.

长臂卷瓣兰 chang bi juan ban lan

Bulbophyllum purpureifolium Averyanov; Cirrhopetalum longibrachiatum (Z. H. Tsi) Garay, Hamer & Siegerist.

Rhizome stout, ca. 6 mm in diam., often branched, rooting from base of pseudobulbs. Pseudobulbs well spaced, erect, narrowly ovoid, 4-4.3 cm, ca. 1 cm in diam., with a terminal leaf. Petiole 2-3 cm; leaf blade elliptic, large, 12.5-15.5 × 3.5-5 cm, thickly leathery, base contracted into petiole, apex obtuse. Scape from base of pseudobulb, erect, 15-28 cm; umbel 3- or 4-flowered; peduncle 2-3.5 mm in diam., sparsely with 3 or 4 sheaths ca. 1 cm; floral bracts lanceolate, ca. 9 mm, apex acuminate. Pedicel and ovary ca. 2 cm. Flowers pale green, tinged with purple. Dorsal sepal ovate, concave, ca. 15 × 9 mm, margin fimbriate in apical half, apex acuminate; lateral sepals narrowly lanceolate, ca. 35 × 6 mm, twisted near base, their upper and lower edges connate to each other forming a tube, with their apices separate, apex acuminate. Petals falcate-lanceolate, ca. 10 × 4 mm, margins densely fimbriate, apex with a long awn ca. 0.8 mm; lip strongly reflexed, lanceolate, ca. 1 cm, base ± conduplicate, base attached to end of column foot by a mobile joint, slightly ciliate, apex acute. Column ca. 5 mm, with triangular, enlarged wings above; foot ca. 10 mm, with free part upcurved, ca. 5 mm; stelidia horizontally spreading, narrowly lanceolate, ca. 5 mm, base slightly twisted; anther cap comblike on apical margin. Fl. Nov.

Tree trunks in forests; 1300-1600 m. SE Yunnan [N Vietnam].


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