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Synonyms: |
Aspidium boryanum Willd. Dryoathyrium boryanum (Willd.) Ching Dryopteris boryanum (Willd.) C.Chr. Lunathyrium boryanum (Willd.) H. Ohba |
Common names: | |
Frequency: | Rare |
Status: | Native |
Description: |
Rhizome erect, with a short caudex; rhizome scales pale brown, (sub)entire, narrowly ovate, 5 mm long. Fronds tufted, arching, herbaceous. Stipe up to 1 m long, strawcoloured, smooth except for pale brown scales similar to those of the rhizome near the base. Lamina 3-pinnate to 4-pinnatifid, up to 1.2 m × 0.7 m, narrowly ovate in outline, basal pinnae hardly reduced. Pinnae shortly petiolate, oblong-lanceolate in outline, divided into 15-20 pairs of pinnules. Pinnules subsessile, oblong-acuminate in outline, base truncate, 2-pinnatifid, cut to the costules into narrowly oblong, rounded secondary pinnules, margins deeply serrate-crenate, glabrous on both surfaces, except for minute, scattered, brown hairs on costules and veins; veins free. Sori round, 0.6 mm in diameter, up to 10 per lobe; indusium minute, entire, circular, membranous. |
Notes: | |
Derivation of specific name: | boryanum: named after a French botanist, J.B.M. Bory de St. Vincent (1780-1846). |
Habitat: | Deeply shaded streambanks in wet evergreen forest, often where there is a break in the canopy thus allowing slightly more light. |
Altitude range: (metres) | 1190 - 1700 m |
Worldwide distribution: | Paleotropic |
Zimbabwe distribution: | E |
Growth form(s): | Terrestrial. |
Endemic status: | |
Red data list status: | |
Insects associated with this species: | |
Spot characters: | Display spot characters for this species |
Images last updated: | Sunday 18 August 2013 |
Literature: |
Burrows, J.E. (1990). Southern African Ferns and Fern Allies. Frandsen, Sandton. Pages 278 - 279. As Dryoathyrium boryanum (Includes a picture). Burrows, J.E. & Burrows, S.M. (1993). An annotated check-list of the pteridophytes of Malawi Kirkia 14(1) Page 97. As Dryoathyrium boryanum Da Silva, M.C., Izidine, S. & Amude, A.B. (2004). A preliminary checklist of the vascular plants of Mozambique. Southern African Botanical Diversity Network Report No. 30 Sabonet, Pretoria Page 16. Jacobsen, W.B.G. (1983). The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Page 411. As Dryoathyrium boryanum (Includes a picture). 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 11. Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Page 139. (Includes a picture). Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 216. Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Pages 207 - 208. As Dryoathyrium boryanum (Includes a picture). |
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