Oleandra distenta Kunze

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Oleandra distenta

Photo: Petra Ballings
Vumba, Bunga Forest

Oleandra distenta

Photo: Petra Ballings
Vumba, Bunga Forest

Oleandra distenta

Photo: Petra Ballings
John Meikle Forestry Estate, Stapleford

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Synonyms: Aspidium articulatum (Juss. ex Poir.) Willd.
Oleandra africana Bonap.
Oleandra articulata 'Cav.' var. welwitschii Bak.
Oleandra densifrons Kunze
Oleandra distenta Kunze var. hirsuta Tardieu
Oleandra distenta Kunze var. villosa Tardieu
Oleandra distenta Kunze var. welwitschii (Baker) Kornas
Oleandra welwitschii (Baker) Pic.Serm.
Common names:
Frequency:
Status: Native
Description:
Rhizome long creeping, up to 4 mm in diameter, scandent, branched; rhizome scales appressed, shiny, lanceolate, up to 7 mm long, with a dark brown central stripe and paler ciliate margins. Roots thin, wiry, singly below each old frond. Fronds widely spaced on rhizome or on short side branches, erect to arching, deciduous, simple. Stipe articulated near the base, up to 6 cm long, covered with scattered scales similar to, but smaller than those on the rhizome. Lamina 14-33 × 1.5-6.5 cm, glabrous on both surfaces, thinly membranous (dry) to thinly coriaceous, linear lanceolate in outline, base wedge-shaped, apex abruptly ending in a tip, margin subentire, wavy; midrib prominent below; veins obvious, simple, sometimes forked near the costa, finely parallel. Sori circular, up to 2.5 mm in diameter, in a irregular line on either side of the midrib, situated within the inner half of the lamina; indusium round to kidney-shaped, small, hairless, dark brown, entire.
Notes: Can be separated from other ferns by the rampant rhizome with long filiform roots, the articulated stipe, the sori that are placed in 2 irregular rows on either side of the midrib and the round to kidney shaped indusium.
Derivation of specific name: distenta: extended, stretched out; possibly referring to the widely spaced fronds on the widely creeping rhizome.
Habitat: In high rainfall areas on boulders in riverine or montane forest, sometimes scrambling in trees in evergreen forest, or as a lithophyte on rock faces on mountain peaks.
Altitude range: (metres) 860 - 1850 m
Worldwide distribution: Widespread in tropical and southern Africa.
Zimbabwe distribution: N,C,E
Growth form(s): Epiphyte, lithophyte.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species
Images last updated: Saturday 18 August 2012
Literature:

Burrows, J.E. (1990). Southern African Ferns and Fern Allies. Frandsen, Sandton. Pages 208 - 209. (Includes a picture).

Burrows, J.E. , Burrows, S.M. (1993). An annotated check-list of the pteridophytes of Malawi Kirkia 14(1) Page 91.

Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011). Ferns of Southern Africa, A comprehensive guide Struik Nature Pages 528 - 529. (Includes a picture).

Jacobsen, W.B.G. (1983). The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 326 - 327. (Includes a picture).

Kornas, J. (1979). Distribution and ecology of the Pteridophytes in Zambia Polska Akademia Nauk Wydzial II Nauk Biologicznych Pages 112 - 113.

Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 8.

Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Page 142. (Includes a picture).

Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 149.

Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Pages 165 - 166. (Includes a picture).


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Other sources of information about Oleandra distenta:

Our websites:

Flora of Malawi: Oleandra distenta
Flora of Mozambique: Oleandra distenta
Flora of Zambia: Oleandra distenta

External websites:

African Plant Database: Oleandra distenta
Biodiversity Explorer (Biodiversity of southern Africa): Oleandra distenta
EOL (Encyclopedia of Life): Oleandra distenta
ePIC (electronic Plant Information Center): Oleandra distenta
Flora Zambesiaca web site: Oleandra distenta
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network) taxonomy for plants report for Oleandra distenta
IPNI (International Plant Names Index): Oleandra distenta
Ispot Southern Africa : Oleandra distenta
JSTOR Plant Science: Oleandra distenta
Kew Herbarium catalogue: Oleandra distenta
Tropicos: Oleandra distenta
West African Plants database: Oleandra distenta


Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-16

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2016). Flora of Zimbabwe: Species information: Oleandra distenta.
http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=102070, retrieved 27 May 2016

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