Description:
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Rhizome erect, to 20 mm diameter; rhizome scales lanceolate in outline, apex gradually tapering to a sharp point, margin irregularly fimbriate, 5.26–7.74 × 1.21–1.82 mm, brown to black, composed of thin-walled cells. Fronds monomorphic, tufted, arching, somewhat fleshy, to 80 cm (60-120 cm) long. Stipes 22–30 cm long and 3 mm diameter, matte grey to brown above and green below, canaliculate, at first densely clothed with subulate clathrate subentire or fimbriate scales, gradually becoming subglabrous. Lamina 1-pinnate, oblong-lanceolate in outline, 40–100 ×(30–)34–40 cm, pinnae in 7–9 pairs; pinnae alternate, lanceolate to narrowly elliptic in outline, 1–20 × 3.8– 4.8 cm at base, petiolate, petiole 9–17 mm long, unequally cuneate at the base with the acroscopic base parallel to the rachis and the basiscopic one cuneate, up to 2.5 cm long, margin slightly to coarsely crenulate, tapering into an pointed apex, dark green and shiny above, glabrous or nearly so; basal pinnae slightly reduced, terminal pinna similar to other pinnae; veins forked. Sori 16–27 pairs, equally spread along the veins at 45° to midrib, usually extending from near the costa almost to the margin; indusia linear membranous, entire, ± 1 mm wide. Spores with alate ecto-perispore with reticulate meso-perispore bearing only few holes. |
| Literature:
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Fisher E. & Lobin W. (2024). Checklist of Lycopodiopsida (clubmosses and quillworts) and Polypodiopsida (ferns) of Rwanda. Willdenowia 53(3) Page 156.
Fisher, E. & Lobin, W. (2023). Synoptic Revision of Aspleniaceae (Asplenium, Hymenasplenium) of Rwanda. Phytotaxa 608 (1) Pages 24 - 29. (Includes a picture).
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