太白山鸟巢兰 tai bai shan niao chao lan

Plants leafless, holomycotrophic, 12-40 cm tall. Rhizome with many fleshy roots. Peduncle glabrous, with 3 or 4 sheaths; sheaths tubular, membranous; rachis 4-12 cm, villous, densely 20-40-flowered, flowers usually in clusters of 3 or 4; floral bracts oblong, 2.5-3.5 mm, apex mucronate. Flowers small, not resupinate, gray-black, lip with a gray-white margin; pedicel 3-4 mm, glabrous; ovary obovate, ca. 3 mm, subglabrous. Dorsal sepal linear-lanceolate, ca. 5 × 0.5-0.6 mm, glabrous, 1-veined, apex acuminate; lateral sepals similar to but slightly wider than dorsal sepal, oblique. Petals narrowly lanceolate, ca. 3 × 0.5 mm, glabrous, apex acuminate; lip obovate to suborbicular, ca. 3 × 2-2.2 mm, 3-, 4-, or rarely 5-veined, apex mucronate, unlobed. Column very short, less than 0.5 mm, shorter than rostellum and anther; anther erect.

● Mixed Abies fargesii and Betula utilis forests; ca. 2900 m. Shaanxi.