Zygophlebia - Polypodiaceae

Zygophlebia devoluta (Baker) Parris






Polypodium devolutum Baker
Ctenopteris devoluta (Baker) Tardieu

Common name


Rhizome short-creeping, not branched; rhizome scales narrowly lanceolate to linear-lanceolate in outline, 2.2–6.7 x 0.3–0.5 mm. Fronds closely spaced (0.1-1.1 mm). Stipe 1.2–9.3 cm, with simple eglandular hairs 0.9–3.4 mm long. Lamina narrowly elliptic to narrowly lanceolate in outline, 6.2–16.9 x 1.5–2.7 cm, apex bluntly pointed, base ± truncate to tapering, pinnate or deeply pinnately divided to a distance 0.1–0.6 mm from the midrib. Pinnae 14–47 pairs and 1–4 pairs of apical lobes, lowest pair of pinnae sometimes reduced to auricles, usually 2 mm or more long, longest pinnae 6–15 x 2–5 mm, narrowly oblong to narrowly oblanceolate in outline, apex bluntly pointed to rounded; with small hairs 0.8–3.7 mm on both surfaces of lamina and on margin, and translucent 1–2-forked catenate glandular hairs 0.1–0.2 mm as receptacular paraphyses; lateral vein branchlets free, or branchlets of the same vein branch sometimes anastomosing at apex near margin. Sori on 12–37 pairs of pinnae, in apical 1/3 to ± throughout lamina including basal pair of pinnae, 1–9 in each row on longest pinnae, apical 1/5 to ­± throughout pinnae, midway between pinna mid–vein and margin.




Montane forest with Parinari excelsa, Newtonia buchananii, Ocolea usambarensis, Macaranga kilimandscharica, sometimes growing with Bryophytes, Mecodium, Elaphoglossum.

Distribution worldwide

Africa, Madagascar.

Distribution in Africa

Tanzania .

Growth form



  • Parris, B.S. (2005) Grammitidaceae.Flora of Tropical East Africa, Page 18. (Includes a picture).
  • Roux, J.P. (2009) Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands. Strelitzia 23, South African National Biodiversity Institute, Pretoria. Page 166.