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Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011) Ferns of Southern Africa, A comprehensive guide Struik Nature
Jacobsen, W.B.G. (1983) The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria.
Roux, J.P. (2001) Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13
Schelpe, E.A.C.L.E. (1970) Pteridophyta Flora Zambesiaca
Rhizome globose, subglobose or elongated, fleshy. Fronds devided into a simple leaflike fragment (trophophore) and a simple fertile segment (sporophore), inserted at base of the sterile segment or on the petiole, with a double row of sporangia in a spike near the apex. Derivation of name: ophis: snake, glossa: tongue; an allusion to the slender, sometimes forked apex above the fertile spike. Worldwide: c. 30-50 species, cosmopolitan distribution Rwanda: 3 taxa. |
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| Species | Content | |
| costatum R.Br. | Description, Image | |
| thomasii R.T. Clausen | Description | |
| vulgatum L. subsp. africanum Pocock ex J.E. Burrows | Description, Image |
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