Triceratorhynchus Summerh.
  • Summerh., Bot. Mus. Leafl. 14: 232 (1951)


This is a synonym of Angraecinae Summerh.

General Description

Epiphytic herbs with a short many-leaved stems. Leaves distichous, linear, unequally bilobed at apex. Inflorescence spreading, elongate, laxly few–many-flowered. Flowers small, pedicellate. Sepals and petals free, subsimilar. Lip obscurely 3-lobed, concave at base, ovate, acute, spurred, ecallose; spur filiform, elongate, longer than or equalling lip in length. Column short, fleshy; anther hemisphaerical, erose on apical margin; pollinia 2, ovoid; stipites 2, very short, slender; viscidia 2, oblong-elliptic, twice as long as each stipes; rostellum complex, porrect, 3-pronged in front and behind, the central prong in front shorter than the outer ones.

Epiphytic herbs. Roots basal. Stem leafy. Leaves distichously arranged, linear, acute at bilobed apex, with a sheathing, distichous base. Inflorescence axillary, longer than leaves, severalflowered; bracts triangular. Flowers resupinate, green. Sepals and petals linear-tapering, not spreading widely. Labellum concave at base, obscurely trilobed, ecallose, spurred at base; spur upcurved above ovary, cylindrical, much longer than ovary. Column with an oblong anther, with a fringed margin; pollinia two, ellipsoidal, each attached to a stipe (tegula) and that to its own oblongelliptic viscidium, twice as long as tegula; rostellum porrect, three-pronged, central prong shorter than outer ones. Ovary and pedicel geniculate-twisted.

Morphology

Pollen of T. viridiflorus has yet to be studied.

Ecology

The species is an epiphyte on Olea welwitschii Gilg & G.Schellenb. (Oleaceae) and Podocarpus L’Her. ex Pers. (Podocarpaceae) in dense, primary evergreen forest at elevations of 1500–1700 m.

Distribution

Triceratorhynchus is a monospecific genus from Rwanda, Burundi, Uganda, and Tanzania.

Uses

There are no published uses for the species, and it is not in common cultivation.

Literature

in Bot. Mus. Leafl. Harv. Univ. 14: 232 (1951)

Distribution Map

 
  • Native distribution
Found in
  • Africa East Tropical Africa Kenya
  • Uganda
  • West-Central Tropical Africa Rwanda

  Bibliography

  • 1 Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • 2 P. J. Cribb (1989) Orchidaceae. Flora of Tropical East Africa 0 (0)
  • 3 Pridgeon, A.M., Cribb, P.J., Chase, M.W. & Rasmussen, F.N. Genera Orchidacearum: Volume 6. Epidendroideae (Part Three). (Oxford University Press: 2014).

 Information From

Flora of Tropical East Africa
http://apps.kew.org/efloras/
Flora of Tropical East Africa. Published on the Internet; http://apps.kew.org/efloras/
WCS higher taxonomy
  • B All Rights Reserved
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
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