美叶沼兰（海南植物志）
Malaxis calophylla (Rchb. f.) Kuntze, Rev. Gen. Pl. 2: 673. 1891; 海南植物志4: 208. 1977; Seidenf. in Dansk Bot. Ark. 33 (1): 54. fig. 41. 1978, et in Opera Bot. 114: 147. 1992; z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 294. 1995. ——Microstylis calophylla Rchb. f. in Gard. Chron. n. s., 12: 718. 1879. ——Microstylis wallichii Lindl. var. brachycheila Hook. f., Fl. Brit. Ind. 5: 686. 1888. ——Malaxis calophylla (Rchb. f.) Kuntze var. brachycheila (Hook. f.) T. Tang et F. T. Wang in Acta Phytotax. 1 (1): 71. 1951.
Humus-rich soils in dense forests; 800-1200 m. Hainan, S Yunnan [Cambodia, India (Sikkim), Indonesia, Malaysia, Myanmar, Thailand, Vietnam]. |
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Plants terrestrial. Stem cylindric, 2-3(-5) cm, 2-3 mm in diam., fleshy, with several nodes, ± enclosed in sheaths. |
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Leaves 2-4, adaxially pale brown and stained with white on both sides, obliquely ovate, ovate-elliptic, or narrowly ovate, 3.5-8(-12) × 1.5-4(-5) cm, base contracted into an amplexicaul petiole 1.5-3 cm, margin ± crisped, apex acuminate. |
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Peduncle 7-30 cm, nearly wingless; rachis 2.5-12 cm, 10-20- or more flowered; floral bracts narrowly lanceolate or nearly subulate, 1.5-2.5 mm. Flowers pale yellowish green, lip with purplish red base; pedicel and ovary 2.5-4 mm. Dorsal sepal suboblong, 4-4.5 × 1.5-1.8 mm, margin revolute, apex obtuse; lateral sepals broadly oblong-elliptic, 4-4.5 × 2-2.5 mm, margin revolute. Petals narrowly linear, ca. 4 × 0.3 mm, apex obtuse; lip superior, broadly ovate-elliptic or broadly oblong in outline, 5-5.5 × 3.5-4 mm, base with a central depression surrounded by a fleshy ridge; abruptly contracted toward apex into a short apiculus and shallowly 2-lobed, auricles ovate, 1.7-2.2 mm, decurrent backward embracing column. Column ca. 1 mm, stout, apex with 2 triangular-lanceolate wings. Capsule obovoid-ellipsoid or narrowly obovoid-oblong, 9-13 × 4-5 mm; fruiting pedicel 4-5 mm. Fl. Jul, fr. Sep. |
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