AFRICAN

ORCHIDS

Oeonia brauniana var. sarcanthoides (Schltr.) Bosser, Bull. Mus. Natl. Hist. Nat., B, Adansonia 11: 162 (1989).
Homotypic Synonyms:
Oeoniella sarcanthoides Schltr., Repert. Spec. Nov. Regni Veg. Beih. 33: 364 (1925).
Lemurella sarcanthoides (Schltr.) Senghas, Schlechter Orchideen 1(16-18): 1018 (1986).
Heterotypic Synonyms:
Oeonia subacaulis H.Perrier, Notul. Syst. (Paris) 7: 138 (1938).
Lemurella tricalcariformis H.Perrier, Notul. Syst. (Paris) 14: 164 (1951).
Description:
Plants sub acaulis or with a stem 5-6 cm long and 2 mm in diameter; sheaths heavily striate, 10 veined generally, leaves 4-5 generally, oblong (2.5-4.5 x 1-1.2 cm), attenuate toward the base and slightly acute apically. inflorescence from in the sheaths of the inferior leaves, shorter titan the leaves, 2 or 3 flowered, with the sepals and petals of a yellowish or slightly greenish and the labellum white, maculate with red at the base of the median lobes; peduncle 1-2 cm long, clad basally with several sheaths; bracts loose, subacute, 2.5-3.5 mm long. Median sepal oblong (10 x 4.5 mm), attenuate from the upper third to the base, obtuse and slightly emarginate apically, obscurely triveined the laterals free, similar to the median sepal, but thickly cucullate apically and shortly apiculate. Petals same as the median sepal, but narrower (10 x 3.5 mm). Labellum embracing the column and very concave basally, densely pubescent above, thick, deeply 5-lobed, 8 mm bong and 10 mm wide between the tips of the lobes; lateral lobes obovate (6 x 3.5 mm) 5 veined: the intermediaries oblong-obtuse (4 x 2.2 mm), 3 veined; the apicals shorter titan the laterals, orbicular (2.5 mm in diameter), emarginate apically and 5 veined; spur short, cylindrical. Anther with a slightly swollen connective in front with the margin obvious, excised medially, with the side margins upturned behind; pollina spherical (0.5 mm), sessile, in 2 small cupules, joined apically by a 0.5 mm long bandelett, attenuate flattened in a wide gland in the form of a hemispherical crown, 1.2 mm wide and hollowed below. Column thicker (3 mm) than tall (2 mm); auricles l mm long, very obtuse, recurved sickle-shaped behind, median tongue of the rostellum thick, spatulate-obtuse longer than the auricles. Pedicel 6-8 mm long.
Habitat:
Epiphytes of branches; in eastern forests, from 700 m alt.; flowering in February.
Cultivation:
As given for the genus.
Distribution:
N. & E. Madagascar
References:
WCSP (2017). 'World Checklist of Selected Plant Families. 09.03-2017; http://apps.kew.org/wcsp/
Images:
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