三蕊兰 san rui lan

Tupistra singapureana Wallich ex Baker, J. Linn. Soc., Bot. 14: 581. 1874; Neuwiedia balansae Baillon ex Gagnepain; N. curtisii Rolfe; N. zollingeri H. G. Reichenbach var. singapureana (Wallich ex Baker) de Vogel.

Plants 40-50 cm tall. Rhizome ca. 10 cm, 1-1.5 cm in diam., nodes with slightly lignified proplike roots. Stem short. Leaves many, nearly tufted toward base of stem; blade lanceolate to oblong-lanceolate, 25-40 × 3-6 cm, abaxially with conspicuous convex veins, margin membranous, apex long acuminate; petiole-like base 5-10 cm. Rachis 6-8 cm, 10-75-flowered, glandular pubescent; floral bracts ovate to ovate-lanceolate, 1-1.5 cm, outer surface glandular pubescent especially on veins. Flowers with ovary elliptic, sparsely glandular pubescent. Sepals white or buff-ochre, oblong to narrowly elliptic, 15-18 × ca. 4 mm, outer surface glandular pubescent, apex aristate; dorsal sepal usually slightly smaller than lateral sepals. Petals greenish white, obovate to broadly cuneate-obovate, ca. 16 × 5-6 mm, outer surface glandular pubescent especially on midvein, apex mucronate; lip similar to petals but with a thickened midvein. Column suberect; anthers linear, 5-6 mm, with 2 unequal locules at base; central stamen with a long, slender, costate filament ca. 8 mm; lateral stamen with flat, costate filaments, ca. 3.5 × 0.7 mm; style ca. 7 mm. Fruit orange to red. Fl. May-Jun.

Forests; ca. 500 m. Hainan (Baoting, Ding’an), Hong Kong, SE Yunnan (Hekou) [Indonesia, Malaysia, Singapore, Thailand, Vietnam].