Anoectochilus koshunensis Hayata, Icon. Pl. Formosan. 4: 104. 1914. 恒春银线兰 heng chun yin xian lan Odontochilus koshunensis (Hayata) S. S. Ying. 

 Plants ca. 20 cm tall. Stem ascending, 2–4-leaved. Leaves abaxially reddish purple, adaxially blackish green with white venation, ovate to orbicular-ovate, 3–4 × 2–3 cm, apex acute; petiole-like base and tubular sheath ca. 1 cm. Peduncle 7–10cm, with 2 or 3 sheathing sterile bracts, reddish brown; rachis ca. 4.5 cm, 5- or 6-flowered; floral bracts pinkish, ovate to ovate-lanceolate, ca. 7 mm, shorter than ovary, outer surface pubescent. Flowers suberect, not resupinate, white; ovary and pedicel cylindric-fusiform, not twisted, ca. 12 mm, pubescent. Sepals reddish brown, pubescent on outer surface, 1-veined; dorsal sepal orbicular-ovate, cymbiform, 5–5.5 × 3–4 mm, apex acute to cuspidate; lateral sepals spreading, narrowly elliptic, oblique, 7–8 × 3.5–4 mm, apex acute. Petals white, ovate-elliptic, strongly oblique, falcate, 5.5–6 × 1.5–2 mm, 1-veined, apex cuspidate and incurved; lip white, Y-shaped, ca. 10 mm; hypochile 1–2 mm; mesochile reflexed at right angle from apex of hypochile, 3–4 mm; flanges oblong to linear-lanceolate, 4–5 × ca. 2 mm, entire or sometimes shallowly notched at apex; epichile longitudinally dilated, 2-lobed; lobes diverging at an acute angle to one another, oblong, 7–9 × 3.5–3.7 mm, apex obtuse to slightly mucronate; spur tubular-conic, 4–6 mm, mouth ca. 2 mm in diam., apex deeply bilobed, containing 2 irregular, stalked calli. Column ovoid, 3–3.5 mm, with 2 lamellate wings; stigma lobes orbicular. Fl. Jul–Oct. 

 ● Broad-leaved evergreen forests; 700–2000 m. Taiwan.