| Home | > | List of families | > | Thelypteridaceae | > | Amauropelta | > | oppositiformis |
| Synonyms: |
Thelypteris oppositiformis (C. Chr.) Ching Thelypteris strigosa sensu Schelpe |
| Common names: | |
| Frequency: | Rare |
| Status: | Native |
| Description: |
Rhizome short erect; rhizome scales up to 4 mm long, brown, narrowly ovate, entire. Fronds tufted, erect to arching, not proliferous, herbaceous. Stipe up to 4 cm long, matt to dark brown, with minute white hairs. Lamina up to 60 × 15 cm, narrowly oblong-lanceolate to elliptic in outline, 2-pinnatifid, lower pinnae gradually reduced and widely spaced, lowest pinnae auriculate, reduced and reflexed. Pinnae narrowly oblong-lanceolate, up to 9 × 1.5 cm; upper surface with short, white hairs; lower surface subglabrous but with distinctive yellowish or reddish glands particularly along the veins and the costules. Ultimate lobes oblong, apex rounded to acute, margins entire; veins 6-7 pairs, not meeting the veins of the adjacent lobes. Rhachis pale brown, thinly set with minute pale hairs. Sori up to 8 per lobe; exindusiate or indusia small, with short white hairs, very quickly falling off. |
| Notes: | A. bergiana resembles A. oppositiformis but has hooked hairs on lower surface of lamina and a minute indusium without glands but with minute hairs.
A. oppositiformis look for: straight hairs, golden to red glands on lower surface of lamina, exindusiate or indusia falling off early, basal pinnae gradually decrescent becoming increasingly auricled, veins of pinnae lobes not meeting below sinus. |
| Derivation of specific name: | oppositiformis: formed opposite; refers to the opposite position of the pinnae. |
| Habitat: | Along moist streambanks in montane grassland, full sun or shade. |
| Altitude range: (metres) | 700 - 1680 m |
| Worldwide distribution: | Burundi, Cameroon, DRC, Ethiopia, Kenya, Madagascar, Malawi, Nigeria, Rwanda, South Africa, Sudan, Tanzania, Uganda, Zimbabwe. |
| 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 |
| Literature: |
Burrows, J.E. (1990). Southern African Ferns and Fern Allies. Frandsen, Sandton. Page 270. As Thelypteris oppositiformis (C.Chr.) Ching (Includes a picture). Burrows, J.E. & Burrows, S.M. (1993). An annotated check-list of the pteridophytes of Malawi Kirkia 14(1) Page 95. Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 45. as Thelypteris oppositiformis Chapano, C. & Mamuto, M. (2003). Plants of the Chimanimani District National Herbarium and Botanic Garden, Zimbabwe Page 55. As Thelypteris oppositiformis Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011). Ferns of Southern Africa, A comprehensive guide Struik Nature Pages 698 - 699. (Includes a picture). Dowsett-Lemaire, F. (1989). The flora and phytogeography of the evergreen forests of Malawi. I: Afromontane and mid-altitude forests; Bull. Jard. Bot. Nat. Belg. 59(1/2) Page 26. As Thelypteris strigosa Jacobsen, W.B.G. (1983). The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Page 384. (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 10. Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Page 116. Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 200. Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Page 193. As Thelypteris strigosa (Willd.) Tardieu |
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