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FOC | Family List | FOC Vol. 25 | Orchidaceae | Tangtsinia

1. Tangtsinia nanchuanica S. C. Chen, Acta Phytotax. Sin. 10: 195. 1965.

金佛山兰 jin fo shan lan

Plants leafy, autotrophic, 15-35 cm tall. Rhizome 1-2 cm, 0.4-0.8 cm in diam.; roots 2.5-4 mm in diam. Stem slender, with several sheaths at base, 4-6-leaved. Leaves elliptic to lanceolate, 6-9 × 1.2-3 cm, 5-7-veined, apex acute to acuminate. Inflorescence 3-6-flowered or rarely only 1- or 2-flowered; rachis 3-6 cm; floral bracts deltoid-lanceolate, much reduced, 1-1.5 mm, though lowest one to 10 mm. Flowers erect, weakly spreading, yellow, base slightly tinged with white; pedicel and ovary 13-16 mm. Sepals narrowly elliptic to elliptic, 15-17 × 3.5-4.5(-5.5) mm, 5-veined, apex obtuse. Petals obovate-elliptic, 11-13 × 4-4.5(-5.5) mm, apex obtuse; lip similar to petals, not distinct, lacking lamellae, spurless. Column yellowish green, subtrigonous-cylindric, 6-8 mm, apex slightly dilated, with 3 large and 2 small wings; large wings white, spotted with silver, subligulate; smaller wings inconspicuous, similar in color to column; anther oblong-ovoid, ca. 1.5 mm; filament broad, subovate-lanceolate, 1-1.5 mm; pollinia white, narrowly falcate-ovate, ca. 1.6 mm. Capsule erect, subellipsoid, ca. 2 × 0.7 cm. Fl. Apr-Jun.

● Openings in forests, thicket margins, grassy slopes; 700-2100 m. Chongqing, N Guizhou.


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