裂瓣玉鳳蘭

Plants 40-50 cm tall. Tuberoids elongate ellipsoid, 2-4 cm long. Stem straight, 20-40 cm long, 4-7 mm thick, enclosed by several tubular sheaths, with 7-10 leaves clustered on upper part. Leaves oblong-lanceolate, 8-20 cm long, 4-6 cm wide, apex acute, base cuneate. Raceme 30-45 cm long, with few to numerous densely arranged flowers; peduncle with few scales; bracts lanceolate, 1-2 cm long, long acuminate; pedicel and ovary 2-2.5 cm long, with narrow neck. Flowers pale green, ca. 2.5 cm across; dorsal sepal cymbiform, oblong, 8-12 mm long, 3-4 mm wide, apex aristate, 3-keeled abaxially; lateral sepals obliquely ovate, 8-12 mm long, 5 mm wide, apex acute or short caudate; petals mainly 2-partite from base, segments filiform, 15-20 mm long, divaricate by 80-120 degrees, upper segment usually 2lobed near base, lower segment with 4 or 5 deep thread-like lobes; lip whitish, mainly 3-partite from base, segments filiform, 15-25 mm long, tortuous, divaricate at ca. 90 degrees, center segment often 3lobed from middle, lateral segments divided into more than 5 thread-like deep lobes; spur cylindrical, 18-25 mm long; column ca. 5 mm long, with small globose auricles on both sides near base; anther cells narrowly clavate, parallel but divergent below, base protruding and recurved upward; pollinia oblong, 1.5 mm long, with slender caudicle nearly twice as long, attached to small viscidium; stigmaphore thick spatulate; rostellum triangular, with slender lateral arms positioned above stigmaphore. Capsule fusiform, 15-20 mm long, pedicel ca. 10 mm long.

TAOYUEN: Najeishan, Su 8542. NANTOU: Wushe, Mori s. n. Aug 1907. TAITUNG: Tawu, Su 1334. HUALIEN: Tali Village, Su 9465.

Southern China. Taiwan, broadleaved forests below 1,500 m.