海南石豆兰 hai nan shi dou lan

Rhizome slender, ca. 0.8 mm in diam., rigid, bearing 1 leaf and 2 or 3 slender roots at nodes. Pseudobulb absent. Leaves 1-1.5 cm apart from each other, subsessile; blade elliptic, 8-15 × 6-8 mm, fleshy, apex obtuse. Scapes several, usually arising from leaf-bearing nodes, erect, 2-3.5 cm, slender; umbel 2-flowered; peduncle ca. 0.4 mm in diam., with 3 or 4 tubular sheaths ca. 2.5 mm; floral bracts ovate-lanceolate, ca. 1.5 mm, apex acute. Pedicel and ovary ca. 3 mm. Flowers slightly nodding, pure yellow, thickly textured. Sepals free; dorsal sepal ovate-lanceolate, 5-7 × ca. 2.5 mm, apex acute; lateral sepals obliquely ovate-triangular, 4.5-6.5 × ca. 3.2 mm, base adnate to column foot, apex acute. Petals oblong, ca. 3 × 1.2 mm, entire, obtuse; lip broadly ovate in outline, ca. 3.2 mm, base attached to end of column foot by a mobile joint, apex obtuse; disk with a pair of calli adaxially. Column ca. 2 mm; foot upcurved, ca. 2.5 mm, with free part ca. 1 mm; anther cap glabrous. Fl. Nov.

● Tree trunks in mixed forests; ca. 500 m. E Hainan.