Disperis leuconeura Schltr.

Glabrous herb, 4.5–15 cm. tall, arising from a globose hairy tuber ± 1 cm. in diameter.. Leaves 2, opposite or subopposite, sheathing at the base, sessile, ovate or ovate-lanceolate, 0.6–2.5 cm. long, 0.3–1.2 cm. wide, acute at the apex, rounded or subtruncate at the base above the sheath, the main venation, particularly the midrib, white in both living and dry states.. Racemes 1–2-flowered; flowers rose; bracts leaf-like, ± 7 mm. long, 3 mm. wide, acute.. Intermediate sepal linear-lanceolate, 6 mm. long, joined to the petals to form an open boat-shaped hood; lateral sepals apparently not joined, obliquely falcate, ± 4 mm. long, 2 mm. wide, bearing sacs ± 1–1.5 mm. long.. Petals elliptic, 5.5 mm. long, the free margin wavy.. Lip 4 mm. long, with claw bent back over itself near base and bearing a papillate appendage with 2 curved lobes like the head of a buffalo (appearing rounded in immature flowers); claw terminating in a glabrous linear limb.. Rostellum-arms very long, curved and thin, ± 2.5 mm. long.. Fig. 39/5, p. 220.