Disperis bosseri la Croix & P.J.Cribb, Adansonia, III, 24: 83 (2002).
Description:
Slender terrestrial herb 15-18 cm high. Tubers 5-10 mm long. Leaves 3, alternate, more or less evenly spaced along the stem, 1-2 cm long, ovate to lanceolate, acute, suberect, sessile, clasping the stem. Inflorescence 1-2-flowered; bracts 8- 14 mm long, oblong, acute. Flowers pale pink; pedicel and ovary 9-15 mm long. Dorsal sepal c. 6 × 1 mm, linear; lateral sepals free to base, divergent, 6-7 × 3 mm, obliquely ovate, apiculate, with a prominent, obtuse spur 2-3.5 mm long, c. 1.5 mm wide. Petals c. 6 × 2.5 mm, spathulate, apiculate, adnate to the dorsal sepal and forming a concave hood c. 6 mm high and 6 mm deep. Lip with the basal part, ascending, obtriangular, 6-7 mm long, attached to the base of the column for 1-1.5 mm, terminal appendage ovate, 5,5-6,5 mm long, rounded or subtruncate at the base which is adorned with a small median subcircular, papillose lobule, obtuse and subtriangular at the tip; the upper face having in the basal half two slender erect wings with a thick and convex median zone between them, margins finely papillose towards the summit. Rostellar arms scarious, rigid, linear, a little dilated and rounded at the apex, 3-4 mm long.
Notes:
This species is only known from the type collection. It also resembles Disperis concinna Schltr., known from South Africa and Zimbabwe, but the differences in the lip and appendage seem sufficient to recognize it as distinct.
Habitat:
Humid places, on steep slopes, in full sun light; 2400 m.
Distribution:
C. Madagascar
