Luisia cordata Fukuyama Bot. Mag. (Tokyo). 48: 306. 1934.

心唇钗子股 xin chun chai zi gu

Stems erect or pendulous, 30-60 mm, ca. 5 mm in diam., usually unbranched. Leaves ca. 20 cm × 3 mm, acute at apex. Inflorescences 2- or 3-flowered; floral bracts distichous, broadly ovate, ca. 3 mm, acute. Flowers often nodding, ca. 1 cm in diam., sepals and petals green, lip deep purple-red; pedicel and ovary green, ca. 1 cm. Dorsal sepal ligulate, ca. 5 × 3 mm, 5-veined, obtuse; lateral sepals ovate-lanceolate, cymbiform, ca. 6 × 4 mm, dorsally carinate, 7-veined, apex acute. Petals linear, ca. 7.5 × 2 mm, acute; lip ca. 7 mm, fleshy, glabrous, without a distinct boundary between hypochile and epichile; hypochile ca. 3 × 4.5 mm, concave, lateral lobes very short; epichile cordate, large, ca. 4 × 5 mm, with a swelling near apex. Column ca. 3.5 mm. Fl. Jan.

● Epiphytic on tree trunks in thickets along the seashore. S Taiwan.