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

8. Oberonia longibracteata Lindley, Gen. Sp. Orchid. Pl. 15. 1830.

长苞鸢尾兰 chang bao yuan wei lan

Iridorkis longibracteata (Lindley) Kuntze; Malaxis longibracteata (Lindley) H. G. Reichenbach.

Stem rather short. Leaves subbasal, often 5 or 6 in a tuft, laterally compressed, linear or linear-lanceolate, 3-6 × 0.3-0.6 cm, slightly thickened, veins obscure, base not articulate, apex acuminate. Peduncle subcylindric, 5-7 cm, connate in lower part to uppermost leaf, appearing to arise from leaf blade, wingless or nearly so, lower part with 1 or 2 sterile bracts; rachis 2.5-3.5 cm, laxly many flowered; floral bracts linear-lanceolate, 4-5 mm, exceeding flowers. Flowers 1-1.5 mm in diam.; pedicel and ovary 1-1.5 mm. Sepals ovate, 0.8-1 × ca. 0.5 mm, apex obtuse. Petals oblong-ovate, ca. 0.8 × 0.4 mm, margin ± erose; lip broadly ovate in outline, ca. 0.7 mm, 3-lobed; lateral lobes ovate to broadly oblong, conspicuously smaller than mid-lobe; mid-lobe subquadrate or broadly elliptic, ca. 0.6 × 0.6 mm, margin inconspicuously erose, apex mucronulate or slightly irregularly incised. Column erect, short, stout. Fl. Oct. 2n = 30.

Epiphytic on trees in dense forests. SE Hainan [Sri Lanka, Thailand, Vietnam].


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