Bolusiella Schltr.
  • Schltr., Beih. Bot. Centralbl. 36(2): 105 (1918)


This is a synonym of Angraecinae Summerh.

General Description

Erect, epiphytic or occasionally lithophytic, psygmoid herbs. Roots tufted. Stem abbreviated, simple, leafy above. Leaves equitant, imbricate, unifacial, arranged in a plane forming a fan, narrowly elliptic or ensiform to linear-ligulate, obtuse to acute, rigid and articulated to a sheathing base, fleshy, sometimes sulcate-canaliculate and falcate-recurved. Inflorescence exceeding leaves, manyflowered, arising from axils of old leaf-sheaths; peduncle shorter than or equalling rachis, rarely longer; bracts imbricate and partially concealing flowers, membranous, grey to blackish brown or olive. Flowers resupinate, white. Sepals and petals free, oblong or narrowly elliptic, obtuse to acuminate, subequal, spreading. Labellum entire or obscurely trilobed, spurred, oblong or ovateelliptic, obtuse to acuminate, sometimes recurved; spur cylindrical, ellipsoid or conical, obtuse, usually shorter than labellum. Column oblong, constricted above, without a foot; anther quadrate, cucullate, pollinia two, oblong or ellipsoid, each attached by a linear stipe to an ovate viscidium; rostellum subulate, hamate.

Erect epiphytic or occasionally lithophytic, entirely glabrous monopodial herbs. Stems abbreviated, simple, leafy above, with numerous tufted roots below. Leaves equitant, imbricate, arranged in a vertical plane forming a fan, narrowly elliptic or ensiform to linear-ligulate, obtuse to acute, rigid and articulated to a sheathing base, fleshy, sometimes sulcate-canaliculate and falcate-recurved. Inflorescence exceeding leaves, densely or laxly many-flowered, arising from axils of old leaf-sheaths; peduncle shorter than or equalling rhachis, rarely longer; bracts small or large, imbricate and partially concealing flowers, membranous, grey to blackish brown or olive. Flowers resupinate, very small, white. Tepals free, oblong or narrowly elliptic, obtuse to acuminate, subequal, spreading. Lip entire or obscurely 3-lobed, spurred, oblong or ovate-elliptic, obtuse to acuminate, sometimes recurved; spur cylindrical, ellipsoid or conical, obtuse, usually shorter than lip. Column oblong, fleshy, constricted above, without a foot; rostellum subulate, hamate; anther quadrate, cucullate; pollinia 2, oblong or ellipsoid, each attached by a linear stipes to a large ovate viscidium.

Short-stemmed, monopodial epiphytic herbs with numerous, fine basal roots.Leaves equitant, imbricate, forming a fan, fleshy.Inflorescences arising at base of plant from axils of old leaf sheaths, densely or laxly several- to many-flowered.Flowers resupinate, white, small.Tepals free, subequal.Lip entire or obscurely 3-lobed, spurred, the spur usually shorter than the lip.Column oblong, fleshy, constricted above, lacking a foot; rostellum subulate, hooked; anther quadrate, cucullate; pollinia 2; stipites 2, linear; viscidium 1, large, ovate.

Morphology

Schill and Pfeiffer (1977) examined pollen of B. batesii and found it similar to that of Angraecum with no further details.

Ecology

Species of the genus occur from sea level to 2500 m in humid lowland and evergreen forests, riverine forests, plantations (e.g. coffee), or on moss- and lichen-covered trees on rocky outcrops.

Distribution

Bolusiella comprises five species distributed in tropical and southern Africa.

Uses

There are no ethnobotanical uses known for the species, and they are all rare in cultivation.

Literature

in Beih. Bot. Centr. 36: 105 (1918)

in Beih. Bot. Centralbl. 36, abt. 2: 105 (1918).

in Beih. Bot. Centralbl. 36, 2: 105 (1918).

Distribution Map

 
  • Native distribution
Found in
  • Africa East Tropical Africa Kenya
  • Tanzania
  • Uganda
  • Northeast Tropical Africa Ethiopia
  • South Tropical Africa Angola
  • Malawi
  • Zambia
  • Zimbabwe
  • Southern Africa KwaZulu-Natal
  • West Tropical Africa Ghana
  • Guinea
  • Ivory Coast
  • Liberia
  • Nigeria
  • Sierra Leone
  • Togo
  • West-Central Tropical Africa Burundi
  • Cameroon
  • Central African Republic
  • Congo
  • Equatorial Guinea
  • Gabon
  • Gulf of Guinea Is.
  • Rwanda
  • Zaire
  • Western Indian Ocean Comoros

  Bibliography

  • 1 Verlynde, S. & al. (2013). Taxonomic revision of the genus Bolusiella (Orchidaceae, Angraecinae) with a new species from Cameroon, Burundi and Rwanda. Phytotaxa 114: 1-22.
  • 2 Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • 3 Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. Continental Publishing, Deurne.
  • 4 V.s. Summerhayes (1968) Orchidaceae. Flora of West Tropical Africa 3 (1)
  • 5 Pridgeon, A.M., Cribb, P.J., Chase, M.W. & Rasmussen, F.N. Genera Orchidacearum: Volume 6. Epidendroideae (Part Three). (Oxford University Press: 2014).
  • 6 Schlechter, F.Richard Ru Original publication of Bolusiella. 36(2), (1918).

 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/
Flora Zambesiaca
http://apps.kew.org/efloras/
Flora Zambesiaca. Published on the Internet; http://apps.kew.org/efloras/
Flora of West Tropical Africa
http://apps.kew.org/efloras/
Flora of West Tropical Africa. Published on the Internet; http://apps.kew.org/efloras/
WCS higher taxonomy
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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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