卵萼沼兰 luan e zhao lan

Microstylis ovalisepala J. J. Smith, Bull. Jard. Bot. Buitenzorg, sér. 3, 10: 42. 1928; Malaxis ovalisepala (J. J. Smith) Seidenfaden; M. szemaoensis Tang & F. T. Wang.

Plants terrestrial. Stem cylindric, 1-2 cm, fleshy. Leaves 2-4; petiole ca. 2 cm, sheathlike; blade obliquely ovate or elliptic, 2-6.5 × 1.2-3.5 cm, base cuneate, apex acute. Inflorescence erect; peduncle 8-12 cm, ± longitudinally ridged; rachis 2.5-6 cm, laxly 7- or 8-flowered; floral bracts reflexed, lanceolate, 3-4 mm. Flowers pale green to yellow, 4-5 mm in diam.; pedicel and ovary 3-4 mm. Dorsal sepal narrowly oblong to oblong, 3-3.5 × ca. 1 mm, margin often revolute, apex obtuse; lateral sepals ovate-elliptic, 2.5-3 × ca. 1.5 mm, slightly oblique, margin revolute, apex obtuse. Petals narrowly linear, 3-3.5 × ca. 0.4 mm, apex obtuse; lip superior, nearly broadly obovate or broadly oblong in outline, ca. 5 × 3.5 mm, with a central depression, apex 3-lobed or unlobed; if lip 3-lobed, mid-lobe with 1 or 2 teeth on either side, apex 2-lobed, lobules ovate-lanceolate to lunate; if lip unlobed, margin with several irregular teeth; auricles ovate-triangular to triangular-lanceolate, ca. 2.5 mm, surrounding column. Column ca. 1 mm, stout. Fl. Jun.

Shaded slopes; 600-1500 m. S Yunnan [W Indonesia (Sumatra), Thailand].