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  1. Family: Aspleniaceae Newman
    1. Genus: Asplenium L.
      1. Asplenium lademannianum Rosenst.

        This species is accepted, and its native range is Rwanda to Burundi.


    Aspleniaceae, Henk Beentje. Flora of Tropical East Africa. 2008

    Type: Tanzania, “Kondoa-Irangi, Mt Ufiome”, Lademann s.n. (B/P?, holo. – not found) [Note Mt Ufiome = Mt Kwaraha, in T 2 Mbulu District)
    Description from Pichi Sermoilli and Chaerle: “rhizome erect, subwoody, 10–15 mm diameter, with flaccid membranous lanceolate entire acuminate rhizome scales ± 4 mm long, with a large hyaline lumen and dark brown narrow margins, ending in a hair-tip.
    Fronds to 58 × 16 cm.
    Stipe brown or grey-green, 17–22 cm long, with reflexed scales similar to rhizome scales mixed with linear ones, glabrescent.
    Leaf lamina
    Lamina lanceolate in outline, membranous-herbaceous, 2-pinnate, the basal pair remote and slightly reduced, apical pinna reduced, linear, incised-lobed.
    Pinnae in ± 20 pairs, alternate or subopposite, shortly petiolulate, narrowly ovate, to 8 × 2.5 cm, pinnate, caudate-acuminate, the pinnules in up to 8 pairs, to 2 × 1 cm, deeply incised-lobed, glabrous except for the scaly costae and veins.
    Rachis brown, ± densely scaly with scales similar to stipe.
    Sori 2–4 per pinnule, ‘short’.
    Indusium membranous, entire.”
    ‘in silva primaeva’, 1800 m
    Treated by Pichi Sermolli as full species; he saw part of the type – he also said most of the type was now missing at P (“the holotype was held in Rosenstock’s herbarium and now ought to be in Paris herbarium but... (...) in addition to this I have found a pencil rubbing of two fronds in B, two pinnae and some rhizome scales”). He says the rhizome is not erect but shortly creeping with shortly spaced fronds; this is based on Lambinon 74/1540, which “agrees very well with the type”. He adds that it resembles A. aethiopicum but is distinct in short-creeping horizontal rhizome, membranous and long-linear to narrowly linearlanceolate rhizome scales; that small forms of lademannianum look like A. lividum (but differ by rhizome scales and gradual shapes). Larger lademannianum look like A. volkensii but differ in frond dissection and short-creeping, not long-creeping; plus rhizome scale characters. Also treated by Chaerle in his unpublished thesis as a full species, keying out as rhizome creeping, 15 mm thick, 11–22 pinnae pairs, as opposed to rhizome erect/short-creeping, thinner, 6–12 pinnae pairs for A. aethiopicum. I am not convinced by all this. The part of the type with frond tracings at B could very well be A. aethiopicum; there is no indication at all whether the rhizome is erect or creeping. To equate specimens found far away I find very risky; I prefer to treat this taxon as unresolved.
    Range: Not known elsewhere Flora districts: T2 T5


    Native to:

    Burundi, Rwanda

    Other Data

    Asplenium lademannianum Rosenst. appears in other Kew resources:


    First published in Repert. Spec. Nov. Regni Veg. 6: 177 (1908)

    Accepted by

    • Roskov Y. & al. (eds.) (2018). World Ferns: Checklist of Ferns and Lycophytes of the World Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands.


    Flora of Tropical East Africa

    • B.J.B.B. 55: 138 (1985).
    • F.R. 6: 177 (1908)


    Flora of Tropical East Africa
    Flora of Tropical East Africa

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.