| Home | > | List of families | > | Aspleniaceae | > | Asplenium | > | tenuicaudatum |
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| Description: |
Rhizome erect short, densely set with scales; rhizome scales narrowly triangular, but with two large auricles, slightly superposed, forming a subcircular basal part, base cordate-attached, margin entire, but with auricles loosely fringed, ending in short hair, including the auricles 4–5 x 0.7–1.1 mm, heterogeneous texture; auricles in the marginal zone with thin cell walls, chestnut, in the middle part ribbed: ribs with thickened cellular walls, joining together above the point of scale insertion into a single rib, the whole width and length of the remaining scale part, with exception of the terminal hair,thick, rigid, dark brown, strongly thickened cellular walls concealing light. Fronds monomorphic, numerous, tufted, erect-spreading, 28-36 cm long, not proliferous. Stipe rounded at the base, slightly channeled upwards, 12-16 cm long x 0.7-1 mm in diameter, bright chestnut, sparsely scaly, scales similar to rhizome scales, but less thickened. Lamina pinnate, ovate in outline, 16-20 x 8-10 cm; pinnae 2-4 jugate, narrowly stipillate, very variable in form, clearly unequal, narrowly dimidiate-lanceolate, narrowly dimidiate-trullate or long trullate, base long cuneate, upwards unevenly lobed abruptly constricted in a very long slender tail, apical margin serrulate, 6-7.5 x 0.5-1 cm, texture papery, above glabrous, below sparsely scaly, scales thick, with thickened cell walls, ovate-lanceolate, tailed at the apex, sometimes fringed at the base, up to 1 mm long, apical pinna more or less unequally tricuspidate; rhachis channeled, lightly chestnut, shiny, glabrous. Sori linear, tapering off on both sides, up to 15 x 0.8 mm; indusium entire membranous. |
| Notes: | |
| Derivation of specific name: | tenuidaudatum: hinting at the shape of the pinnae which are provided with a very long slender tail. |
| Habitat: | Montane forest. |
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| Worldwide distribution: | Burundi, DRC, Rwanda |
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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) Page 45. Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 98. |
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