Angraecum potamophilum Schltr., Ann. Mus. Colon. Marseille, sér. 3, 1: 199 (1913).
Homotypic Synonyms:
Aerangis potamophila (Schltr.) Schltr., Beih. Bot. Centralbl. 33(2): 427 (1915).
Humblotiangraecum potamophilum (Schltr.) Szlach., Mytnik & Grochocka, Biodivers. Res. Conservation 29: 16 (2013).
Description:
Plants 12-18 cm tall; stem short, cylindrical (6-8 mm in diameter), leaves 4-6, linear (12-IScm. x 5- 8 mm), rugose and thick. Inflorescence 5 cm long, pendent, 3-5 flowered; peduncle shop, covered basally by 3-4 large, short sheaths; bracts deltoid, equaling a quarter the length of the ovary, loose, obtuse, longer titan the internodes of the rachis which are thick and short (4 mm); flowers white, very small for the section (divisions 17-18 mm long). Sepals 5 veined, attenuate from the base to the acute apex, 4 mm wide basally, the laterals shortly joined between their bases and back edge. Petals similar to the median sepal, slightly shorter and narrower. Labellum oval-lanceolate (17-18 x 8 mm below the middle), attenuate-acute toward the apex, slightly narrowed basally and semi-embracing, 13 veined, veins visible; spur filiform-acute, 8 cm long. Column short; auricles rectangular, 2 mm tall and 1 mm wide; median tongue of the rostellum acicular, slightly shorter than the auricles. Anther depressed, rounded in front; pollina 2, embracing with a very short common stripe. Pedicel 25 mm long, ovary, triwinged. Capsule oblong-cuneiform (25 x 10 mm toward the apex, wings excluded), attenuate from the apex to the base, wings wide, 4.5 mm.
Habitat:
Epiphytes of trunks; on large Eugenia bordering rivers; flowering in November.
Cultivation:
As given for the genus.
Distribution:
NW. Madagascar
References:
WCSP (2017). 'World Checklist of Selected Plant Families. 28.01-2017; http://apps.kew.org/wcsp/
Images:
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