AFRICAN

ORCHIDS

Corymborkis corymbis Thouars, Hist. Orchid.: t. 37 (1822).
Homotypic Synonyms:
Corymbis thouarsii Rchb.f., Bot. Zeitung (Berlin) 7: 886 (1849), nom. superfl.
Corymborkis thouarsii (Rchb.f.) Blume, Coll. Orchid.: 126 (1859), nom. illeg.
Heterotypic Synonyms:
Corymbis corymbosa Thouars, Hist. Orchid.: t. 37 (1822).
Corymborkis disticha Lindl., Fol. Orchid. 5: 14 (1854), nom. illeg.
Corymbis welwitschii Rchb.f., Flora 48: 183 (1865).
Corymborkis corymbosa (Thouars) Kuntze, Revis. Gen. Pl. 2: 658 (1891).
Corymborkis welwitschii (Rchb.f.) Kuntze, Revis. Gen. Pl. 2: 658 (1891).
Corymbis leptantha Kraenzl. ex Engl. in H.G.A.Engler (ed.), Pflanzenw. Ost-Afrikas, A: 83 (1895).
Corymbis bolusiana Schltr., Repert. Spec. Nov. Regni Veg. Beih. 33: 131 (1923).
Description:
Rhizome short, more or less vertical. Stem 30-200 cm tall, erect, more or less woody in the lower part. Leaves arranged spirally along the stem, 11-35 cm long, 3-10 cm wide, narrowly ovate to elliptic, plicate, apiculate, attenuated towards the base, margins often undulate. Inflorescence 1-4, up to 7 cm long, erect to drooping panicles with up to 5 branches, rarely with secondarily branches, up to 20-flowered. Peduncles to 9 cm. Flowers greenish-white to white, long, rather inconspicuous. Floral bract ca. 10 mm long, ovate-lanceolate, acute. Ovary longer than bract, narrowly cylindrical. Perianth segments widely spreading and elongated. Dorsal sepal 45-90 mm long, 2-4 mm wide, linear with lanceolate, acute apex. Lateral sepals of the same size, linear with oblique lanceolate, acute apex. Petals 45-90 mm long, 2-5 mm wide, linear with oblique lanceolate, acute apex, often with crenulate margins. Lip 45-90 mm long, claw tapering towards the blade; blade unguiculate, linear, canaliculate, with elliptic, acute apex and here 5-13 mm broad. Gynostemium slightly shorter than the lip, partially enveloped by the lip. Capsules 30 mm long, 6 mm in diameter.
Habitat:
Evergreen, usually lowland, forest, in densely shady undergrowth, often forming large colonies 100–1120 m.
Cultivation:
As given for the genus, warm to cool growing, mycoheterotrophic orchid.
Distribution:
Guinea, Sierra Leone, Liberia, Ivory Coast, Ghana, Togo, Nigeria, Cameroon, Central African Republic, Sao Tomé and Principe (Såo Tomé), Equatorial Guinea (Rfo Muni, Bioko, Annobon), Gabon, the Republic of Congo, the Democratic Republic of Congo (Zaire), Sudan, Uganda, Tanzania, Angola, Malawi, Zimbabwe, Mozambique, Republic of South Africa (Transkei, Natal), Madagascar and Mascarene Is.
References:
Orchidaceae of West-central Africa, vol. 1, Gdansk University Press Gdansk 2010; Field Guide To Ethiopian Orchids Demissew, Cribb and Rasmussen 2004; Orchids of Madagascar Hermans 2007; Field Guide to the Orchids of Northern South Africa and Swaziland McMurty, Grobler, Grobler & Burns 2008; Field Guide to the Orchids of Madagascar Cribb & Herman 2009
Images:
Click on each image to see a larger version.

Habitat/In situ Habitat/In situ  Habitat/In situ  Habitat/In situ 
corymborkis corymbis  corymborkis corymbis 02  corymborkis corymbis 03  corymborkis corymbis in situ 
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.