AFRICAN

ORCHIDS

Platycoryne macroceras Summerh., Kew Bull. 13: 66 (1958).
Description:
Terrestrial herb 20–40 cm tall; tubers up to 17 × 10 mm, ovoid, villous. Leaves 3–6, spaced along the stem, up to 7 × 0.4 cm, linear or linear-lanceolate. Inflorescence 1-flowered, rarely 2-flowered.Flowers cream, creamy-white or lime-yellow (type description says rarely red).Pedicel 4–8 cm long; ovary 1.5 cm long; bracts 2–2.5 cm long. Dorsal sepal erect, 11.5–12 × 8–9 mm, ovate, convex, rounded at the apex or apiculate; lateral sepals spreading, 13–14 × 4–5 mm, curved-lanceolate, oblique. Petals 11.5 × 7–8.5 mm, very curved, obliquely triangular-ovate, adnate to dorsal sepal. Lip entire, deflexed or incurved, 14.5–18 × 3.5–4.5 mm, ligulate with a narrow base, longitudinally convex; spur pendent, 5.5–7 cm long, swollen to a diameter of 2.5–3.5 mm at apex. Anther 5.5 mm high; canals very short. Stigmatic arms 3 mm long. Rostellum 5 mm long; mid-lobe 3 mm high, side lobes almost absent.
Habitat:
In dry grasslands and open dambo, in damp sand among grasses.
Flowering time:
February and November.
Cultivation:
Not in cultivation.
Distribution:
The Democratic Republic of Congo (Zaire) and Zambia. Alt.1500-1650 m.
References:
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)
Images:
Click on each image to see a larger version.

Habitat/In situ  Habitat/In situ Habitat/In situ  Habitat/In situ 
Platycoryne macroceras 01  Platycoryne macroceras 02  Platycoryne macroceras 03  Platycoryne macroceras 04 
Photograph© Nicholas
Case Wightman Image
used with kind
permission.
 
Photograph© Nicholas
Case Wightman Image
used with kind
permission.
 
Photograph© Nicholas
Case Wightman Image
used with kind
permission.
 
Photograph© Nicholas Case
Wightman Image used with kind
permission.