Description:
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Rhizome creeping, up to 11.5 cm long, densely scaly; rhizome scales lanceolate in outline with long filiform apex, 1.8–2.51 × 0.55–0.62 mm at base, × 0.37 mm at middle part, and × 0.17–0.2 mm at apex, scales dark brown, cells with prominent dark walls, 0.07–0.08 × 0.03–0.04 µm. Fronds monomorphic, spaced, pendent. Stipes 17.5–22 cm, maroon to dark brown, canaliculated, glabrous. Lamina 1-pinnate, elliptic in outline, 22–41.5 × (13.5)16–22.8 cm, upper surface green, lower surface greyish-green; pinnae 9–13 pairs, subopposite, basic pinnae as big as or slightly smaller than the others, tapering; terminal pinna lanceolate to ovate with base confluent with highest lateral pinnae, irregularly pinnatifid, glabrous, 4.5–5(7.5) × 3–4 cm near base, lateral pinnae 7.5–11.4 × 1.3–2 cm, lanceolate, toothed on both margins, asymmetric, basiscopic side at the base not serrate, long-acuminate, acumen up to 2.5 cm long; veins dichotomously branched; rhachis brown, with few hair-like scales. Sori in two rows parallel to the midrib, so when mature, they seem to be confluent, broad elliptic, 0.5–0.7 × 0.25 mm, indusia not seen. Spores with reticulate perispore. |
| Literature:
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Fischer E. & Lobin W. (2024). Checklist of Lycopodiopsida (clubmosses and quillworts) and Polypodiopsida (ferns) of Rwanda. Willdenowia 53(3) Page 158.
Fischer, E. & Lobin, W. (2023). Synoptic Revision of Aspleniaceae (Asplenium, Hymenasplenium) of Rwanda. Phytotaxa 608 (1) Pages 35 - 40. (Includes a picture).
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