台湾齿唇兰 tai wan chi chun lan

Anoectochilus inabae Hayata, Icon. Pl. Formosan. 4: 102. 1914 ["inabai"].

Plants autotrophic, 10-20 cm tall. Stem ascending, 4- or 5-leaved. Leaves green, ovate-oblong to ovate, slightly oblique, 4-6 × 2.5-3.5 cm, apex acute; petiole-like base and tubular sheath 1.5-3.5 cm. Peduncle green, tinged reddish brown, 5-8 cm, pubescent; rachis 2-6 cm, laxly 3-10-flowered; floral bracts pale brown, ovate-lanceolate to lanceolate, 8-12 mm, slightly shorter than ovary, outer surface pubescent. Flowers erect, not resupinate; ovary and pedicel reddish brown or green, cylindric-fusiform, not twisted, 10-15 mm, pubescent. Sepals pale green with large dark brownish green patches, outer surface pubescent; dorsal sepal forming a hood with petals, ovate, 5-6 × 3.5-4 mm, apex acuminate or shortly cuspidate; lateral sepals oblong, slightly oblique, 11-12 × 4.5-5 mm, apex acute. Petals pale green with large dark brownish green patches, ovate-lanceolate, strongly oblique, 6.5-7 × 2.2-3 mm, apex acuminate-caudate; lip white, Y-shaped, 17-26 mm; hypochile globose-saccate, ca. 3 mm, aseptate, containing 2 digitate calli; mesochile 9.5-16 × 2-3 mm, with a fimbriate flange along each margin; flanges composed of 5 or 6 filaments and a shallowly crenulate lamella, each filament 4-8 mm; epichile longitudinally dilated, 2-lobed; lobes diverging widely, flabellate, ca. 10 × 5.5 mm, apex obtuse to slightly crenulate. Column slightly twisted, ca. 3.5 mm, with 2 low, lamellate wings; anther ovoid; rostellum erect, furcately bifid; stigma lobes narrowly separated. Fl. May-Aug. 2n = 28.

Moist forests; 500-1700 m. Taiwan [Japan (Ryukyu Islands), N Vietnam].