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Synonyms: |
Aspidium thonningii Schumach. Dryopteris orientalis (J.F.Gmel.) C.Chr. Nephrodium albopunctatum (Bory ex Willd.) Desv. Polypodium orientale J.F.Gmel. |
Common names: | Msasa fern (English) |
Frequency: | Common |
Status: | Native |
Description: |
Rhizome widely creeping, up to 3 mm in diameter; rhizome scales dark brown, peltate, broadly ovate to circular, entire, up to 1.5 mm long. Stipe up to 25 cm long, articulated in upper half, pale matt brown, glabrous or with occasional pale brown scales, up to c. 1 mm long. Fronds spaced, erect, seldom arching, herbaceous to thinly coriaceous, scented. Lamina up to 11-40 × 5.5-17 cm, lanceolate-oblong in outline, deeply 2-pinnatifid. Pinnae up to 9.5 × 1.8 cm, opposite to alternate, basal pinnae possibly somewhat reduced, sessile, lanceolate in outline, articulated; ultimate lobes oblong, apex rounded, entire to shallowly crenate margins, thinly pubescent denser on costae and costules, white dots usually present at the end of the veins on the upper pinna surface. Sori circular, up to 9 per lobe borne about halfway between the costules and the margin; indusium c.0.6 mm in diameter, glabrous, entire. |
Notes: | A common and attractive fern in rocky Brachystegia woodland, where it forms large patches. The fronds shrivel up in the dry season and new green fronds appear in the rainy season.
Looks very much like A. monocarpa which has a stipe that is articulated in the lower half and is lacking the row of white dots near the margins on the upper surface of the pinna lobes. A. orientalis is a woodland species while A. monocarpa is a forest fern. |
Derivation of specific name: | orientalis: oriental, eastern; first described from Yemen, it was originally thought to be a plant from the East and named accordingly. |
Habitat: | Amongst rocks in open deciduous woodland, in dappled shade. |
Altitude range: (metres) | 800 - 1740 m |
Worldwide distribution: | Widespread in tropical Africa, reaching its southern limit in southern Zimbabwe and central Mozambique; also in Yemen, Réunion, Madagascar and Mauritius. |
Zimbabwe distribution: | N,W,C,E,S |
Growth form(s): | Lithophyte, terrestrial. |
Endemic status: | |
Red data list status: | |
Insects associated with this species: | |
Spot characters: | Display spot characters for this species |
Images last updated: | Sunday 19 August 2012 |
Literature: |
Burrows, J.E. (1990). Southern African Ferns and Fern Allies. Frandsen, Sandton. Pages 207 - 208. (Includes a picture). Burrows, J.E. & Burrows, S.M. (1993). An annotated check-list of the pteridophytes of Malawi Kirkia 14(1) Page 91. Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 36. (Includes a picture). Chapano, C. & Mamuto, M. (2003). Plants of the Chimanimani District National Herbarium and Botanic Garden, Zimbabwe Page 7. 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. Pages 325 - 326. (Includes a picture). Kornas, J. (1979). Distribution and ecology of the Pteridophytes in Zambia Polska Akademia Nauk Wydzial II Nauk Biologicznych Pages 114 - 116. 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 143. Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Pages 192 - 193. Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Pages 163 - 165. Wursten, B., Timberlake, J. & Darbyshire, I. (2017). The Chimanimani Mountains: an updated checklist. Kirkia 19(1) Page 80. |
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