AFRICAN

ORCHIDS

Angraecum eburneum Bory, Voy. îles Afrique 1: 359 (1804).
Homotypic Synonyms:
Limodorum eburneum (Bory) Willd., Sp. Pl. 4: 125 (1805).
Angorchis eburnea (Bory) Kuntze, Revis. Gen. Pl. 2: 651 (1891).
Description:
Plants very robust, forming very large clumps, composed of numerous suckers; stems thick, branched more or less elongated, more or less leaning or oblique. Leaves 10-15, rigid, coriaceous, loriform, often slightly wider above the middle, to more than 30 cm long and 3 cm wide. Inflorescences very numerous, longer than the leaves or equal to them, with numerous flowers (15-30 and more); peduncle with numerous thick, wide sheaths shorter than the rachis; bracts wide enveloping the pedicel; flowers, large (divisions 4-5 cm long), white with the sepals green. Sepals and petals lanceolate, 9-11 mm, wide below the middle, attenuate from this point to the subacute apex, the lateral sepals slightly dilate-rounded above the base on their front margin and very shortly joined on their extreme bases. Petals slightly narrower titan the sepals. Labellum very widely oval (35 mm long, and 30 mm wide), acuminate-acute in front, the acumin generally 10 mm long, with very numerous veins (19 generally), sometimes bifurcated, the median thickened-keeled in the lower half, enlarged and nearly bifid basally; spur 6-7 cm long, wide at its oriface (5 mm ) and gradually attenuate from this point toward the apex. Column very thick; auricles subsquare, angles both obtuse; without a median tooth on the rostellum. Anther depressed, wide (4. 4.5 mm) excised in front, the margins forming a dentiform angle acute; pollina obovate, with short retracted cauda, joined by a very small square viscidiums above the base, (according to Finet), 2, hyaline wings attached to the lower surface of the auricles.
Habitat:
The Mascarene and Seychelle Islands. These islands are located in the Indian Ocean, with the Mascarenes located some 400-500 mi. (640-800 km) east of Madagascar, and the Seychelles some 750 mi. (1200 km) northeast of Madagascar. Habitat elevation was not reported, but the Seychelles are low-lying islands, and we have estimated the habitat elevation accordingly.
Cultivation:
Read more of Cultivation of Angraecum eburneum Bory,
Notes:
This exceedingly handsome, bold plant is made to order for those who desire a spectacular specimen plant and have the greenhouse space to accommodate the large size it eventually attains. Although not quite as large as Angraecum superbum, Angraecum eburneum still occupies a considerable area, and a very old plant may reach a height of 5 or even 6 feet. It certainly is not a plant for basements, lights, or small greenhouses. It should grow exceptionally well outdoors in Hawaii, Puerto Rico, and southern Florida. Flowering occurs in early winter, usually late December, in the northern hemisphere.
This species is divided into 4 very distinct sub-species.
Distribution:
SE. Kenya to E. Tanzania (incl. Pemba, Zanzibar), W. Indian Ocean
References:
Voy. i. 359. t. 19. Bechtel, H., P. Cribb, and E. Launert. 1980. Manual of cultivated orchid species. MIT Press, Cambridge, Mass. Hamilton, R. 1988. When does it flower? 2nd ed. Robert M. Hamilton, 9211 Beckwith Road, Richmond, B. C., Canada V6X 1V7. Hawkes, A. (1965) 1987. Encyclopaedia of cultivated orchids. Faber and Faber, London. Hillerman, F. and A. Holst. 1986. An introduction to the cultivated Angraecoid orchids of Madagascar. Timber Press, Portland, Ore.
Photos/drawings:
Bechtel, H., P. Cribb, and E. Launert. 1980. Manual of cultivated orchid species. MIT Press, Cambridge, Mass. (Color photo); WCSP (2017). 'World Checklist of Selected Plant Families. 22.01-2017; http://apps.kew.org/wcsp/
Images:
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Habitat/ In situ Habitat/ In situ In culture
angraecum eburneum 01 angraecum eburneum 02 Angraecum eburneum 01
Photograph Alain Bastide. Image used with kind permission. Photograph Alain Bastide. Image used with kind permission. Photograph© Lourens Grobler. Image used with kind permission.

Habitat/In situ Habitat/In situ Habitat/In situ Habitat/In situ Habitat/In situ Habitat/In situ Habitat/In situ
angraecum eburneum 02 angraecum eburneum 03 angraecum eburneum 04 angraecum eburneum 05 angraecum eburneum in situ angraecum eburneum in situ 02 angraecum eburneum in situ 03
Photograph P. Bernet ©Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission. Photograph P. Bernet ©Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission. Photograph P. Bernet ©Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission. Photograph P. Bernet ©Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission. Photograph P. Bernet ©Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission. Photograph P. Bernet ©Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission. Photograph P. Bernet ©Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission.