Calanthe gustavii M.W.Chase, Christenh. & Schuit., Phytotaxa 472: 162 (2020).
Homotypic Names:

Phaius mannii Rchb.f., Otia Bot. Hamburg.: 118 (1881).
Description:
Rhizome stout. Leaves long petioled, oblong-or elliptical-lanceolate, acute, 1 ft. long, 2 1/2–3 in. broad; petioles 6–8 in. long, somewhat dilated at the base. Scape about as tall as the leaves; raceme about 6–8-flowered. Bracts lanceolate, acuminate, 1 1/2 in. long, deciduous. Pedicels 7–8 in. long. Sepals oblong-lanceolate, acuminate, 1 3/4 in. long, 4–5 lin. broad. Petals similar but a little broader. Lip 3-lobed, 1 1/2 in. long; side lobes narrowly oblong, acute; front lobe oblong, acute or apiculate, much longer than the side lobes; spur slender, 6–8 lin. long. Column clavate, 10 lin. long; wings rounded.
Habitat:
Distribution:

WC. Trop. Africa
References:
Expansion of Calanthe to include the species of Cephalantheropsis, Gastrorchis and Phaius (Collabieae; Orchidaceae), Vol. 472 No. 2: 23 November 2020 Phytotaxa; POWO (2022). "Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://www.plantsoftheworldonline.org/ Retrieved 18 November 2022."
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