| Home | > | List of families | > | Aspleniaceae | > | Asplenium | > | volkensii |
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| Description: |
Rhizome long-creeping, to 5 mm diameter; rhizome scales to 5 x 1.5 mm, dark or mid-brown, lanceolate in outline, margins subentire, colour uniform. Fronds widely spaced, 50–85 cm high. Stipe 23–32 cm long, with shiny brown triangular-ovate minutely toothed acute scales to 3 mm. Lamina dark green, lanceolate in outline, 32–44 x 18–20 cm, apex gradually tapering to a point, 3-pinnate to 3-pinnatifid, lower pinnae very slightly reduced. Pinnae in 20–25 pairs, opposite or alternate, triangular-lanceolate in outline, 10–13 x 3–4 cm, prolonged into a pinnatifid-lobed apex; pinnules obliquely ovate or ovate-oblong in outline, 5–7-lobed or -pinnatisect in lowermost pinnules, with basiscopic base dimidiate-cuneate, acroscopic base subtruncate to cuneate with enlarged lobe, apices irregularly subincised dentate-truncate, veins flabellate, subglabrous above, beneath with sparse shiny brown triangular-ovate scales to 1 mm, mainly on veins. Rhachis and pinnae rhachis with scales similar to stipe. Sori mostly along the pinnule centre and a few in the basal lobes, linear-oblong in outline, 2–5 mm long; indusium membranous, entire, ± 0.4 mm wide. |
| Notes: | |
| Derivation of specific name: | volkensii: the type specimen was collected by G.L.A. Volkens (1855-1917), German botanist and traveller, assistant of A. Engler at the Botanical Museum in Berlin, Curator of the Botanical Gardens in Berlin. |
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| Worldwide distribution: | Burundi, Dem. Republic of Congo, Rwanda, Tanzania. |
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| Spot characters: | Display spot characters for this species |
| Literature: |
Fisher E. & Lobin W. (2024). Checklist of Lycopodiopsida (clubmosses and quillworts) and Polypodiopsida (ferns) of Rwanda. Willdenowia 53(3) Page 158. Fisher, E. & Lobin, W. (2023). Synoptic Revision of Aspleniaceae (Asplenium, Hymenasplenium) of Rwanda. Phytotaxa 608 (1) Pages 50 - 56. (Includes a picture). Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 101. |
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