折唇线柱兰 zhe chun xian zhu lan

Plants 15-30 cm tall, slender. Rhizome elongate. Stem erect, greenish brown, 4-6-leaved. Leaves cauline, widely spaced, withered at anthesis, bright green, ovate-lanceolate, 3-4 × 1.5-2 cm, base obtuse, apex acute; petiole-like base 1-2.5 cm including tubular sheath. Inflorescence 10-20 cm, with 1 or 2 pubescent sterile bracts, villous; rachis 5-8 cm, subdensely several to densely many flowered; floral bracts reddish brown, ovate-lanceolate, 6-8 mm, pubescent, margin ciliate, apex acuminate. Flowers resupinate, small; ovary and pedicel subcylindric-elliptic, 8-10 mm, pubescent. Sepals not widely spreading, dark greenish brown, puberulent; dorsal sepal ovate, 3-4.5 × ca. 2 mm; lateral sepals ovate, slightly oblique, 3-4.3 × ca. 1.8 mm. Petals white, suboblong to subovate, ca. as long as to slightly longer than dorsal sepal, apex acute to obtuse; lip Y-shaped, 3.8-5.2 mm, 3-partite, white at base, mesochile and epichile sometimes yellow; hypochile saccate, containing 2 subulate, hooked calli; mesochile flat, variable in length, to 1.5 mm; epichile dilated, reflexed downward, 2-lobed; lobes diverging at an acute angle, oblong to irregularly rhombic, 2.5-3 × 1.2-1.8 mm. Column 2-2.5 mm; wings low, transversely oblong; anther triangular-lanceolate, ca. 1.5 mm; rostellum arms oblong, ca. 0.8 mm. Fl. Apr.

Open places in forests; ca. 700 m. Hong Kong, Taiwan [Bhutan, NE India, Thailand].

A collection from Hong Kong at Kew (Barretto s.n.) is tentatively referred here.