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Dryopteris pentheri
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Photo: Petra Ballings
World's view road
Photo: Petra Ballings
World's view road
Photo: Petra Ballings
World's view road
Photo: Petra Ballings
Ngomakurira
Photo: Petra Ballings
Mt. Rukotso, Inyanga
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| Synonyms: |
Dryopteris inaequalis sensu Schelpe |
| Common names: | |
| Frequency: | |
| Status: | |
| Description: |
Rhizome creeping, becoming erect at the growing tip, up to 300 × 30 mm; rhizome scales straw- to rust-coloured, narrowly ovate to linear-oblong, up to 37 × 6 mm, margins with long twisted outgrowths, apex thread-like, twisted. Fronds tufted to closely spaced at rhizome apex, erect to arching, up to 1.8 m long, herbaceous. Stipe up to 49 cm long, pale brown above, chestnut-coloured below, with straw- to rust-coloured scales, thread-like to narrowly lanceolate, up to 40 × 7 mm, denser near the base. Lamina up to 78 × 64 cm, ovate to triangular in outline, 3-pinnatifid to 3-pinnate, up to 16 pairs of pinnae, spaced below and somewhat overlapping near the lamina apex. Pinnae up to 32 × 19 cm, forming an angle of 70-80° from the rhachis, usually not reduced and basiscopically developed, basal pair inequilaterally ovate to narrowly ovate in outline. Pinnules: basiscopic pinnule shorter than the 2-3 adjacent pinnules on basal pinnae; ultimate segments ovate to oblong-obtuse, lobed, margins serrate, glabrous on both surfaces but with a few minute hairs and scales along the costules and costae, costules narrowly winged for most of the length. Rhachis straw-coloured with a few straw-to rust-coloured scales similar to but smaller than those on the stipe, narrowly winged towards the apex. Sori round, c. 1.8 mm in diameter, medial on the veins; indusia kidney-shaped, margin entire or wavy, persistent, pale brown, up to 1.6 mm in diameter, glabrous. |
| Type location: |
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| Notes: | |
| Derivation of specific name: | pentheri: named after Arnold Penther (1865-1931) |
| Habitat: | |
| Altitude range: (metres) | |
| Worldwide distribution: | Southern subtropical Africa, tropical Africa, also known from SaonTomé and Madagascar. |
| National distribution: | |
| Growth form(s): | Lithophyte, terrestrial. |
| Endemic status: | |
| Red data list status: | |
| Insects associated with this species: | |
| Spot characters: | Display spot characters for this species |
| Literature: |
Burrows, J.E. (1990). Southern African Ferns and Fern Allies. Frandsen, Sandton. Page 302. Treated under the Dryopteris inaequalis complex Burrows, J.E. & Burrows, S.M. (1993). An annotated check-list of the pteridophytes of Malawi Kirkia 14(1) Page 98. Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 28. as Dryopteris inaequalis (Includes a picture). Chapano, C. & Mamuto, M. (2003). Plants of the Chimanimani District National Herbarium and Botanic Garden, Zimbabwe Page 23. As Dryopteris inaequalis Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011). Ferns of Southern Africa, A comprehensive guide Struik Nature Pages 478 - 479. (Includes a picture). Dowsett-Lemaire, F. (1989). The flora and phytogeography of the evergreen forests of Malawi. I: Afromontane and mid-altitude forests; Bull. Jard. Bot. Nat. Belg. 59(1/2) Page 25. As Dryopteris inaequalis Fischer E. & Lobin W. (2024). Checklist of Lycopodiopsida (clubmosses and quillworts) and Polypodiopsida (ferns) of Rwanda. Willdenowia 53(3) Page 161. Fischer, E. & Killmann, D. (2008). Illustrated Field guide to the Plants of Nyungwe National Park Rwanda. University of Koblenz-Landau. Page 92. (Includes a picture). Jacobsen, W.B.G. (1983). The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 435 - 438. Treated under the Dryopteris inaequalis complex (Includes a picture). Kornas, J. (1979). Distribution and ecology of the Pteridophytes in Zambia Polska Akademia Nauk Wydzial II Nauk Biologicznych Pages 108 - 109. Treated under the Dryopteris inaequalis complex Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 6. Ntore, S. & al. (2024). Checklist of the vascular plants of Burundi Page 31. Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Pages 125 - 126. (Includes a picture). Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 123. Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Pages 221 - 222. Treated under the Dryopteris inaequalis complex Wursten, B., Timberlake, J. & Darbyshire, I. (2017). The Chimanimani Mountains: an updated checklist. Kirkia 19(1) Page 78. |
Other sources of information about Dryopteris pentheri:
Our websites:
Flora of Malawi: Dryopteris pentheriFlora of Mozambique: Dryopteris pentheri
Flora of Rwanda: Dryopteris pentheri
Flora of Zambia: Dryopteris pentheri
Flora of Zimbabwe: Dryopteris pentheri
External websites:
African Plants: A Photo Guide (Senckenberg): Dryopteris pentheriBHL (Biodiversity Heritage Library): Dryopteris pentheri
EOL (Encyclopedia of Life): Dryopteris pentheri
GBIF (Global Biodiversity Information Facility): Dryopteris pentheri
Google: Web - Images - Scholar
iNaturalist: Dryopteris pentheri
IPNI (International Plant Names Index): Dryopteris pentheri
JSTOR Plant Science: Dryopteris pentheri
Mansfeld World Database of Agricultural and Horticultural Crops: Dryopteris pentheri
Plants of the World Online: Dryopteris pentheri
Tropicos: Dryopteris pentheri
Wikipedia: Dryopteris pentheri
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