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
Plants terrestrial. Rhizome erect, massive, forming a short caudex; rhizome scales brown, subentire. Fronds tufted, firmly herbaceous, monomorphic. Stipe not articulated, scaly. Lamina oblong-ovate in outline, bipinnate. Pinnules dimidiate, trapeziform, articulated at the base, apex rounded, basal margin thickened; veins free. Sori elongate, terminal on the veins; indusia peltate with narrow elongated stalk. Derivation of name: didymos: twin, double, chlaina: cover; referring to the seemingly double indusia. Worldwide: 22 species, more or less pantropical. Tanzania: 1 taxon. |
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| Species | FTEA divisions | Content |
| spinulosa (Brause) Li Bing Zhang & H.Shang | Description, Image |