兰屿芋兰 lan yu yu lan

Tuber whitish, subglobose or ovoid, 7-12 mm in diam. Leaf abaxially pale green, adaxially green, 5- or 6-sided to cordate, 3-6 × 4-5.5 cm, membranous, glabrous, with 5 or 7 main veins, base deeply cordate, margin crisped, apex acute; petiole-like stalk erect, 4-6 cm, with 1 or 2 short tubular sheaths at base. Inflorescence 8-15 cm, 1-flowered; peduncle brownish beige, with 1 or 2 tubular sheaths, elongating in fruit; sheaths brownish beige with purple flecks, 2-3.5 cm, apex acuminate or acute; floral bract lanceolate or linear-lanceolate, 4-8 × 1-3 mm, apex acute. Flower nodding, resupinate, opening widely, 15-20 mm in diam.; pedicel and ovary 6-8 mm, glabrous. Sepals pale greenish brown with purple flecks on outer surfaces, lanceolate, 16-20 × 3-4 mm, apex acute or acuminate. Petals pale greenish brown, lanceolate, 15-18 × 2-3 mm, apex acute; lip white with small purple flecks, narrowly oblong, 12-15 × 5-7 mm, spurless, 3-lobed near middle; lateral lobes erect and loosely embracing column, triangular, 4.5-5.5 × 2-3 mm, apices acute; mid-lobe obovate or orbicular, 6-8 × 4-5 mm, apex rounded or obtuse; disk with a longitudinal ridge extending from base of lip almost to apex of mid-lobe. Column white with purple spots, 4.5-6 mm, apex dilated; stigma shield-shaped. Fl. Mar-Apr.

● Evergreen forests. S Taiwan (Lan Yu).