Platycoryne alinae Szlach., Fl. Cameroun 34: 202 (1998).
Tubers 2, up to 3 cm long, 0.6 cm in diameter, narrowly cylindrical, thick. Stem 20-30 cm tall, erect, rather delicate, glabrous. Leaves 4-5, distributed along stem, 4.5-5.5 cm long, lanceolate, acute, erect, decreasing in size up the stem. Inflorescence up to 10 cm long, 1-2-, occasionally 3-flowered, lax. Flowers large, resupinate, yellow to yellow-orange. Floral bracts up to 20 mm long, broadly ovate-elliptic, shortly acuminate. Pedicel 40-45 mm long, very slender, erect, twisted. Ovary up to 20 mm long, slender, slightly arcuate. Dorsal sepal 16 mm long, 13 mm wide, orbicular-ovate, subacute, cochleate, with elevated thick apical keel outside, erect. Petals 15 mm long, 6 mm wide, obliquely oblong-ovate, subacute, with small, ca. 0.6 mm long lobule at the base, broadly united with the gynostemium. Lateral sepals 16 mm long, 7 mm wide, obliquely elliptic above narrow base, apex subacute, semi-cucullate, thickened. Lip 15 mm long, 4 mm wide, ligulate, strongly thickened towards truncate apex, with inconspicuous, triangular basal wings. Spur 9-9.5 cm long, 2 mm in diameter, narrowly cylindrical, slightly swollen in the apical fifth, blunt. Anther ca. 3 mm tall, rostellum middle lobe massive, equal in length to connective, in front of it, auricles probably lacking.
No data. June.
This species apperas to be related to Platycoryne macroceras Summerh. from Zambia and the Democratic Republic of Congo (Zaire), but it differs by its longer spur, larger perianth segments, petals with small basal lobules and longer antherophores.
Not in cultivation.
Cammeroon. Alt. 1650 m.
Orchidaceae of West-central Africa, vol. 1, Gdansk University Press Gdansk 2010
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