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This species is accepted, and its native range is Cameroon to Uganda and Northern Prov.

[FTEA]

Thelypteridaceae, Bernard Verdcourt. Flora of Tropical East Africa. 2006

Type
Type: Namibia, Otjiwarongo District, Schelpe 4791 (BOL, holo.; BM!, iso.)
Vegetative Multiplication Rhizomes
Rhizome creeping, with brown lanceolate acuminate entire slightly pilose scales up to 11 mm long
Morphology Leaves
Fronds spaced up to 1 cm apart, 0.35–1.5 m tall
Morphology Leaves Stipes
Stipe pale brown 30–63 cm long, glabrous
Morphology Leaves Leaf lamina
Lamina narrowly elliptic to lanceolate in outline, deeply bipinnatifid, 30–70 cm long, 15–40 cm wide, acuminate with a deeply pinnatifid terminal segment; sometimes up to 3 pairs of basal pinnae reduced and deflexed; middle pinnae narrowly oblong, 8–20 cm long, 1.8–2.3 cm wide, acuminate, pinnatifid into narrowly oblong lobes 5–10 mm long, 2–3.5 mm wide, sometimes falcate, obtuse; veins entirely free or contiguous, meeting in the sinus membrane, occasionally ± anastomosing
Morphology Reproductive morphology Sori Indusium
Indusia conspicuous, usually with dense long white hairs.
Ecology
Swampy streamsides with Eulophia, Thelypteris confluens etc. very often in riverine forest, mist forest with Macaranga, Albizia, Newtonia etc., also in essentially drier areas, steep rocky slopes with Terminalia, Combretum, Acacia etc., streamsides in Brachystegia–Uapaca woodland, bogs in rough bushy grassland and in cultivations by streams; 800–1900 m
Note
Some of the information for this species is taken from sheets determined by Schelpe or Holttum but have field notes which do not describe the rhizome or have inconsistencies e.g. creeping but fronds tufted. Richards 7383 (Tanzania, Ufipa District, Sumbawanga, Kaka R.,) has been determined by Alston as Thelypteris pseudogueintziana (Bonap.) Alston, but I do not see how it differs from the above species. If they prove to be the same, then Bonaparte’s name is much the older.
Distribution
Flora districts: U2 K3 K 4?, K7 T2 T4 T7 T8 Range: Cameroon, Congo (Kinshasa), Angola, Zambia, Malawi, Zimbabwe, Namibia

Native to:

Angola, Cameroon, Kenya, Malawi, Namibia, Northern Provinces, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

Thelypteris chaseana Schelpe appears in other Kew resources:

First published in J. S. African Bot. 31: 263 (1965)

Not 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. [Cited as Christella chaseana.]

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0