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Angraecum expansum Thouars, Hist. Orchid.: 57 (1822).
Homotypic Synonyms:
Aerobion expansum (Thouars) Spreng., Syst. Veg. 3: 716 (1826).
Aeranthes expansa (Thouars) S.Moore in J.G.Baker, Fl. Mauritius: 351 (1877).
Epidorkis expansa (Thouars) Kuntze, Revis. Gen. Pl. 2: 660 (1891).
Angraecum expansum var. genuinum Cordem., Rev. Gén. Bot. 11: 419 (1899), nom. inval.
Arachnangraecum expansum (Thouars) Szlach., Mytnik & Grochocka, Biodivers. Res. Conservation 29: 11 (2013).
Heterotypic Synonyms:
Angraecum expansum var. inflatum Cordem., Rev. Gén. Bot. 11: 419 (1899).
Description:
Plant erect or curved, growing in tufts, simple or branched, with rather few verrucose roots near the base of the stem. Leaves 1 cm apart, mostly near apex of stem, rigid, dark green, lanceolate, unequally bilobed at the apex, 2-3 cm long, 5-6 mm wide. Inflorescence axillary, slender, single flowered because the lower one of 2 inside the bract aborts. Flower greenish or yellowish with white lip; sepals oval-lanceolate, acuminate, shorter than the petals; petals similar to the sepals; lip uppermost, almost square, funnel-shaped, with a wide crest along the centre, and an acumen at the apex; spur slender below the wide mouth, curving upwards, 5-6 cm long.
Habitat:
Epiphyte, fairly common on trees at medium to high altitudes; 1000-2000 m.
Cultivation:
As given for the genus, warm to cool growing epiphyte.
Distribution:
Réunion
References:
Historie Particulier des Plantes Orchidees Recueilles Sur Trois Iles Australes d'Afrique Thouars 1822; Angraecoid Orchids Stewart, Hermans and Campbell 2006; WCSP (2017). 'World Checklist of Selected Plant Families. 27.01-2017; http://apps.kew.org/wcsp/
Images:
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Photograph Alain Bastide. Image used with kind permission. Photograph Alain Bastide. Image used with kind permission. Photograph Alain Bastide. Image used with kind permission. Photograph Alain Bastide. Image used with kind permission. Photograph Alain Bastide. Image used with kind permission. Photograph Alain Bastide. Image used with kind permission.