Calcearia sinii (Tang & F. T. Wang) M. A. Clements & D. L. Jones.

Plants small, to 4 cm tall. Tuber ovoid to ellipsoid, 3.5-6 × 3.5-4 mm; subterranean stem erect, with long curved soft hairs. Stem puberulent, with 1 short cataphyll at basal node. Leaf solitary, near apex of stem, sessile, broadly ovate, 9-18 × 8-16.5 mm, with reticulate venation, base cordate, amplexicaul, margin shallowly undulate, apex long acuminate. Floral bract subulate, ca. 1.5 × as long as ovary. Flower solitary, deep purple; ovary ca. 3 mm. Dorsal sepal oblanceolate, ca. 18.5 × 5 mm, 9-veined, apex rounded and long apiculate; lateral sepals free, subulate, ca. 14 × 1 mm. Petals similar to lateral sepals, to 25-30 mm, 1-veined; lip subobovoid when expanded, ca. 13 × 11 mm, 13-veined, basally tubular and erect, apical part recurved, margin erose, apex rounded; disk lacking a lamella but with 1 large callus at base; spurs 2, hornlike, ca. 5 mm. Column ca. 3.8 mm. Fl. Jun-Nov.

● Forests; 1500-2300 m. C and N Guangxi, C Taiwan.