Dryopteris katangaensis J.P. Roux

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Common names:
Status: Native
Rhizome short, erect, up to 12 mm in diameter, set with roots, rhizome scales dull brown to ferrugineous, texture papery, linear, truncate to cordate, margins wavy to irregularly toothed, irregularly set with long flagelliform outgrowths, twisted, the apex flagelliform, twisted, to 23 × 3 mm. Fronds tufted, up to 5 per plant, suberect to arching, to 94 cm long. Stipe pale green, drying stramineous, up to 49 cm long, to 9 mm in diameter, proximally adaxially flattened, shallowly sulcate higher up, densely scaled near base, moderately scaled higher up, the scales like rhizome scales but lanceolate-caudate in outline, and to 20 × 3 mm. Lamina firmly herbaceous, ovate to broadly ovate in outline, to 3-pinnate, up to 46 × 33 cm, with up to 10 pairs of stalked pinnae. Pinnae stalked, the stalk up to 9 mm long, the basal pair inequalaterally narrowly ovate in outline, to 2-pinnate, pinnae higher up lanceolate to oblongacuminate in outline, basiscopically developed, up to 24 × 13.5 cm, opposite to alternate, spaced or overlapping, with up to 10 pairs of pinnules. Pinnules stalked, the stalk up to 3 mm long, upper surface glabrous, lower surface sparsely set with hairs and scales, the hairs occurring along the costa and veins, up to 0.65 mm long, the scales stramineous, papery to membraneous, linear to narrowly lanceolate-caudate in outline, to 3.5 × 0.35 mm. Venation pinnately branched, forked or simple near the apex, evident, ending in the teeth near the margin. Rhachis straw coloured, adaxially shallowly sulcate, narrowly winged in the pinnatifid apex, initially moderately scaled, the scales essentially similar to those on the stipe, to 6 × 1.5 mm; costae like rhachis but scales smaller to 4 × 0.8 mm. Sori circular, inframedial on the anadromous vein branches, discrete or paired, the paired ones touching at maturity. Indusium brown to ferrugineous, persistent, firmly papery, reniform, the margins strongly revolute, entire, up to 2 mm in diameter.
Type location:
Notes: Published by J.P.Roux in 2003 (Botanical Journal of the Linnean Society 142,2:237). However the plant list has it as an unresolved name, tropicos and African Plant database do not recognize this name.
Derivation of specific name:
Habitat: Shaded streambanks in Brachystegia–Jubernardia– Isoberlina ‘miombo’ woodland.
Altitude range: 1530 - 1560 m
Worldwide distribution: Zambia (and DRC?)
Zambian distribution (Flora Zambesiaca): W
Zambian distribution (Provinces):
Growth form(s): Terrestrial.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species

Roux, J.P. (2003). A new Dryopteris (Pteropsida: Dryopteridaceae) species from south-central Africa Botanical Journal of the Linnean Society 142 Pages 237 - 242. (Includes a picture).

Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 122.

Other sources of information about Dryopteris katangaensis:

Our websites:

Flora of Caprivi: cultivated Dryopteris katangaensis

External websites:

African Plants: A Photo Guide (Senckenberg): Dryopteris katangaensis
BHL (Biodiversity Heritage Library): Dryopteris katangaensis
EOL (Encyclopedia of Life): Dryopteris katangaensis
GBIF (Global Biodiversity Information Facility): Dryopteris katangaensis
Google: Web - Images - Scholar
iNaturalist: Dryopteris katangaensis
IPNI (International Plant Names Index): Dryopteris katangaensis
JSTOR Plant Science: Dryopteris katangaensis
Mansfeld World Database of Agricultural and Horticultural Crops: Dryopteris katangaensis
Plants of the World Online: Dryopteris katangaensis
Tropicos: Dryopteris katangaensis
Wikipedia: Dryopteris katangaensis

Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-23

Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A. (2023). Flora of Zambia: Species information: Dryopteris katangaensis.
https://www.zambiaflora.com/speciesdata/species.php?species_id=213630, retrieved 3 December 2023

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