Pneumatopteris prismaticus (Desv.) Holttum

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Synonyms: Aspidium caudiculatum Sieber ex Kunze
Cyclosorus prismaticus (Desv.) Ching
Dryopteris prismatica (Desv.) C.Chr.
Nephrodium prismaticum Desv.
Thelypteris prismatica (Desv.) Schelpe
Common names:
Status: Native
Rhizome not seen. Frond arching, non-proliferous, herbaceous. Stipe pale-brown, glabrous, surface smooth. Lamina up to 1 × 0.48 m., shallowly 2-pinnatifid, narrowly ovate-elliptic in outline, acute with c. 3 pairs of reduced basal pinnae; pinnae up to 24 × 2.2 cm., broadly linear or attenuate, base truncate, shallowly pinnatifid into short oblong broadly acute entire lobes up to 4 mm; glabrous ventrally except for few white curved hairs along the costa, glabrous dorsally, the lamina with a rather warted appearance; 8 pairs of veins per lobe with 2 pairs of veins anastomosing below the sinus and with the fifth vein sometimes running into the sinus. Rhachis pale-brown, glabrous. Sori circular, up to 8 per pinna lobe borne nearer the costule than the sinus membrane; indusium 0.5 mm in diameter, glabrous.
Notes: This species is recognizable by having 2 pairs of veins anastomosing below the sinus, a lamina that is not proliferous, decrescent and has costae & costules that are glabrous.
Derivation of specific name:
Habitat: Moist evergreen forests.
Altitude range: 1675 m (approx)
Worldwide distribution: Malawi, Mauritius, Réunion
Malawi distribution: N
Growth form(s): Terrestrial.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species

Burrows, J.E. & Burrows, S.M. (1993). An annotated check-list of the pteridophytes of Malawi Kirkia 14(1) Page 95. as Thelypteris prismatica

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 26. As Thelypteris prismatica

Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Page 118.

Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 207.

Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Page 197. as Thelypteris prismatica

Other sources of information about Pneumatopteris prismaticus:

External websites:

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

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2014-24

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2024). Flora of Malawi: Species information: Pneumatopteris prismaticus., retrieved 1 March 2024

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