AFRICAN

ORCHIDS

Dinklageella liberica Mansf., Repert. Spec. Nov. Regni Veg. 36: 64 (1934).
Homotypic Synonyms:
Solenangis liberica (Mansf.) R.Rice, Oasis 3: 14 (2006).
Description:
Plant with long scandent stems bearing long, branching aerial roots amongst the widely spaced leaves, up to 100 cm long or more. Leaves 2 cm apart, spreading, in 2 rows, narrowly elliptic, 1.7-3.5 cm long above a basal sheath clasping the stem, 0.8-1.5 cm wide. Inflorescences arising from the base of the leaf sheath, erect or spreading, 5-7 cm long, 3- to 6-flowered; bracts small, 4 mm long; pedicel with ovary slender, 10 mm long. Flowers white or cream, sometimes tinted with yellow or orange; sepals elliptic, obtuse, 7-8.5 mm long; petals similar but narrower; lip 3-lobed in the upper two thirds, lobes oblong, rounded, 16-17 mm long in total; spur S-shaped, narrowing from a wide mouth and slightly inflated at the apex, 2.5-3 cm long.
Habitat:
Epiphyte and on rocks, along forest margins and on plantation trees, often in exposed positions in humid situations; flowering October and November.
Cultivation:
As given for the genus.
Distribution:
W. & WC. Trop. Africa
References:
Flora Of Madagascar Perrier 1981; Encyclopedia of Cultivated Orchids Hawkes 1965; Angraecoid Orchids Stewart, Hermans, Campbell 2006; WCSP (2017). 'World Checklist of Selected Plant Families. 17.03.2017; http://apps.kew.org/wcsp/
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Dinklageella minor Summerh., Kew Bull. 14: 156 (1960).
Homotypic Synonyms:
Lacroixia minor (Summerh.) Szlach., Ann. Bot. Fenn. 40: 70 (2003).
Solenangis minor (Summerh.) R.Rice, Oasis 3: 14 (2006).
Description:
Plant with scandent stems bearing long, branching aerial roots and leaves throughout its length. Leaves in 2 rows, 7-15 mm apart, spreading, lanceolate-ligulate, 1.3-2.7 cm long above a basal sheath clasping the stem, 5-9 mm wide. Inflorescences arising from the base ol the leaf sheath, erect or spreading, 1.5-2.5 cm long, 2- or 3-flowered; bracts small, 2-3 mm long; pedicel with ovary slender, 5-6 mm long. Flowers white; sepals narrowly oblong, 5 mm long; petals linear oblong, obtuse, 5 mm long, 1.25 mm wide; lip 3-lobed in the upper third, lobes narrowly ovate, obtuse, 6.5-7.5 mm long in total; spur much swollen from a narrow mouth, 2.5 mm long.
Habitat:
?
Cultivation:
As given for the genus.
Distribution:
W. Trop. Africa
References:
WCSP (2017). 'World Checklist of Selected Plant Families. 17.03.2017; http://apps.kew.org/wcsp/
Images:
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Dinklageella villiersii Szlach. & Olszewski, in Fl. Cameroun 36: 818 (2001).
Homotypic Synonyms:
Dinklageella liberica var. villiersii (Szlach. & Olszewski) R.Rice, Prelim. Checklist & Survey Subtrib. Aerangidinae (Orchidac.): 32 (2005).
Solenangis liberica var. villiersii (Szlach. & Olszewski) R.Rice, Oasis 3: 14 (2006).
Description:
It seems to be very similar to Dinklageella liberica but a little smaller in most respects. The lip is 3-lobed from about the middle, instead of in the upper two thirds only, and the mid-lobe is truncate.
Habitat:
?
Cultivation:
As given for the genus.
Distribution:
Gabon
References:
WCSP (2017). 'World Checklist of Selected Plant Families. 17.03.2017; http://apps.kew.org/wcsp/
Images:
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Dinklageella scandens Stévart & P.J.Cribb, Kew Bull. 59: 79 (2004).
Homotypic Synonyms:
Solenangis saotomensis R.Rice, Oasis 3: 14 (2006).
Description:
A scrambling herb with an elongate, climbing, many-leaved, terete stem, to 37 × 0.4 cm; roots aerial, stilt-like, to 22 × 0.15 cm. Leaves distichous or opposite, coriaceous, 1.9 - 2.6 cm apart, pendulous to erect-spreading, indistinctly to distinctly keeled, articulate to 1.4 - 1.9 cm long conduplicate basal sheaths; petiole to 1 × 3 - 4 mm; blade 2 - 4.5 × 0.8 - 1.9 cm, ovate to oblong, unequally to equally obtusely bilobcd. Inflorescence axillary, spreading to suberect, 7.3 - 10.4 cm long, 5 - 8-flowered; peduncle 2.3 - 2.7 × 0.12 cm; rachis 4.5 - 5.3 × 0.16 - 0.2 cm; bracts 3.5 - 5 × 3 mm, sheathing, triangular, shorter than the pedicel and ovary. Flowers white, sparsely black-pubescent; pedicel and ovary curved, 12 - 16 mm long. Dorsal sepal 8 - 9 × 3 - 4 mm, obovate, slightly emarginatc at apex. Lateral sepals 10.5 - 11 × 4 - 5 mm, obliquely elliptic to obovatc, pubescent, slightly keeled and apiculate. Petals 10.5 - 11 × 3.6 mm, angular-obovate. Lip 16 - 19 × 11 - 12 mm, 3-lobed in the middle; claw 6 - 7.5 × 3.5 - 4.5 mm, canaliculate; lateral lobes 4 - 6 × 2.5 - 3.5 mm, oblong, apex obtuse; mid-lobe 8 - 9.5 × 2 - 2.5 mm, narrowly oblong, apex entire, truncate or denticulate; spur 2.5 - 3.5 × 2 mm long, swollen from a narrow base, compressed, puberulous. Column very short, apex truncate, 1.5 mm high; anther cap 1 × 1 mm, hemispherical; rostellum bifid when pollinaria are removed, lobes obliquely erect, 0.3 mm long; stipes not seen; viscidium not seen. Capsules 6 × 1.2 cm, ellipsoidal.
Habitat:
This species is a climbing chamaephyte which grows in swamp meadows. It is found amongst the vegetation of Lagoa Amelia (which is an ancient volcanic crater, now filled in), in areas covered by open vegetation characterized by Heteradelphia paulowilhemia and Rapanea melanophloeos. In this habitat, the taxon is terrestrial and forms dense populations, individuals above the herbaceous stratum kept together by long aerial roots (Stévart and Cribb 2004).
Cultivation:
As given for the genus.
Distribution:
São Tomé.
References:
WCSP (2017). 'World Checklist of Selected Plant Families. 17.03.2017; http://apps.kew.org/wcsp/
Images:
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