拟石斛 ni shi hu

Dendrobium changjiangense S. J. Cheng & C. Z. Tang, Acta Phytotax. Sin. 18: 98. 1980.

Rhizome creeping. Stems erect or decumbent, 6-9 cm, 2-4 mm in diam., branched or unbranched, completely enclosed in leaf sheaths. Leaves distichous, ascending, densely telescopic, laterally compressed and shortly sword-shaped, 3-5 cm, 6-10 mm or more wide, thickly fleshy, sheathing at base. Inflorescences often subterminal, ca. 1 cm, flowers opening one at a time in succession; floral bracts broadly ovate, 4-7 mm, membranous, acute; pedicel and ovary ca. 3 mm. Flowers spreading, purplish black, thickly fleshy. Dorsal sepal elliptic, 4-5 × 2-2.5 mm or more, acute; lateral sepals obliquely ovate-triangular, ca. as long as dorsal sepal and slightly broader, base oblique, apex acute; mentum large. Petals oblong, 4-4.5 × ca. 1 mm, rounded and mucronulate; lip ligulate, 6-7 × 2.5-3 mm or more, thickly fleshy, with a subapical wart abaxially, lateral margins slightly lacerate at middle, rounded, adnate to column foot at apex, recurved above middle. Column deep purple, ca. 1.5 mm, foot 4-5 mm, ca. 1.3 mm wide; anther cap subconic, front margin truncate, adaxially with dense, thin papillae.

● Epiphytic on tree trunks in open mountain forests, lithophytic on rocks in mountain valleys; ca. 1000 m. Hainan.

This species was misidentified as Dendrobium concinnum Miquel in Fl. Hainan. (4: 221. 1977).