Species Information - Calanthe bivalvis

Calanthe bivalvis P.J.Cribb & Ormerod, Malesian Orchid Journal 8 (2011)45, fig. 2.

Type: Brass 10600 (holo AMES).

Synonyms:

Terrestrial herb up to 35 cm tall. Leaves spreading, elliptic-lanceolate, 2—3, 6.5—8.5 by 1—2.2 cm; petiole 1—2.5 cm long, slender; margins undulate; apex acuminate. Inflorescence up to 35 cm tall, several-flowered; peduncle 20—25 cm long, densely pubescent, bearing three more or less sheathing, acute to acuminate suberect, sterile scales; floral bracts 0.5—0.7 by 0.1—0.12 cm, suberect to spreading, ovate-lanceolate, acute, pubescent. Flowers resupinate, sepals and petals spreading, pubescent on outer surface of sepals. Pedicel-with-ovary 1—1.5 cm long, pubescent. Median sepal elliptic, 0.35 by 0.15 cm; apex obtuse to subacute. Lateral sepals obliquely oblong 0.35 by 0.2 cm; apex acute. Petals oblong, 0.3 by 0.1 cm, 3-nerved; apex acute. Lip spreading-deflexed, 3-lobed, 0.3 by 0.3 cm; lateral lobes spreading, oblong, 0.1 cm long, with rounded apex; midlobe broadly obtriangular, bilobulate, 0.22 by 0.2 cm, each lobule, 0.08 cm long; callus small, consisting of 3 tapering rows of warts, the outer two largest; spur more or less parallel to ovary, cylindric-clavate, 1 cm long, pubescent. Column very dilated at apex, 0.25 cm long.
(after Cribb, Ormerod & Dudley 2011)

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