Platycoryne guingangae (Rchb.f.) Rolfe in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 7: 258 (1898).
Habenaria guingangae Rchb.f., Flora 48: 179 (1865).
Habenaria poggeana Kraenzl., Bot. Jahrb. Syst. 16: 207 (1893).
Platycoryne poggeana (Kraenzl.) Rolfe in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 7: 258 (1898).
Tuber 1 or 2, 1-2.3 cm long, 0.5-1 cm in diameter, ovoid or ellipsoid. Stem 20-60 cm tall, erect, deliacte, glabrous. Leaves 3-9, usually spread along stem but occasionally forming a tuft at the base, 1.5-5 cm long, 4-8 mm wide, linear to narrowly lanceolate, acute, decreasing in size up the stem, the lower 1 or 2 spread, the upper erect to suberect, loosely adpressed to the stem. Inflorescence 2-4.5 cm long, 1-6(15)-flowered, dense. Flowers small, resupinate, orange. Floral bracts 10-15 mm long, ovate-lanceolate to broadly ovate, acuminate, glabrous, herbaceous. Pedicel and ovary 12-15 mm long, glabrous, erect, twisted in the lower part. Dorsal sepal 6.5-10 mm long, 4-5.5 mm wide, broadly ovate to nearly semi-orbicular, obtuse or apiculate, cochleate, glabrous, nerves branched. Petals 5.2-8.6 mm long, 1.5-2 mm wide, linear-lanceolate to ovate-lanceolate, acute, glabrous, with small basal lobule up to 2 mm long, filiform, acute. Lateral sepals 6.3-10 mm long, 2-3 mm wide, obliquely lanceolate to oblong ovate-lanceolate, subobtuse to apiculate, glabrous, nerves branched. Lip 5.5-10 mm long, rather fleshy, glabrous, distinctly tri-partite, the middle lobe the largest, 1-1.5 mm wide, ligulate to linear-lanceolate, subobtuse to acute; side lobes 1.8-2.5 mm long, 0.2 mm wide, filiform, acute, pendent. Spur 9-14 mm long, 0.7-1.3 mm in diameter, narrowly cylindrical, slightly swollen towards the apex or equals in thickness along its length, blunt to acute. Anther 3.5-5 mm tall, connective apiculate, rostellum middle lobe narrowly triangular-linear, shorter than connective, in front of it, antherophores more or less suberect, slender, stigmaphores massive, auricles prominent.
Permanently wet dambo, sandy grassland.
Flowering usually November-December, sometimes in other period of the year.
Not in cultivation.
Cameroon, Central African Republic?, Gabon, the Republic of Congo, the Democratic Republic of Congo (Zaire), Angola, Zambia. Alt. up to 1500 m.
Orchidaceae of West-central Africa, vol. 1, Gdansk University Press Gdansk 2010; Summerhayes, V.S. (1958). African orchids XXV Kew Bulletin 13(1); La Croix, I. & Cribb, P.J. (1995). Orchidaceae (Part 1) Flora Zambesiaca 11(1)
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