Amblovenatum opulentum (Kaulf.) J.P. Roux

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Synonyms: Amphineuron opulentum (Kaulf.) Holttum
Aspidium extensum Bl.
Cyclosorus extensus (Bl.) H. Ito
Dryopteris extensa (Bl.) Kuntze
Nephrodium wakefieldii Bak.
Thelypteris extensa (Bl.) Morton
Common names:
Rhizome erect or short-creeping or erect, branched, rhizome scales c. 9mm long, dark brown, attenuate, minutely ciliate. Fronds tufted, arching, not proliferous, membranous, 0.9–0.5 m tall. Stipe 40–70 cm long, brown, minutely pubescent, with scales and darker at base. Lamina broadly oblong-ovate in outline, up to 100 × 60 cm, deeply bipinnatifid, with 15-25 pairs of pinnae, the basal pinnae not or rarely reduced. Pinnae narrowly oblong in outline, up to 35 × 29 cm, acuminate, hairy above on costae and margins, with short hairs and yellow glands beneath (particularly along veins), deeply lobed; lobes narrowly oblong, oblique, slightly falcate, 12 × 5 mm; veins 8–10 pairs, the basal pair passing to sides of sinus-membrane or connivent or uniting below it forming a short excurrent vein. Sori up to 16 per lobe, placed above the middle between costules and margins in slight depressions in the lamina; indusia small, with small yellow glands on edges.
Notes: Extremely rare in our area and listed here for the sake of completeness.
Easily recognized by the basally not reduced fronds, the numerous yellow glands along the veinlets on the undersurface and the narrowed bases of the lowest pinnae.
Derivation of specific name: opulentum: sumptuous; obscure reference, possibly to the luxurious growth of the plants.
Habitat: Moist soil in deep shade at a low elevation in calcareous caves.
Altitude range:
Worldwide distribution:
Mozambique distribution: MS
Growth form(s): Terrestrial.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species

Da Silva, M.C., Izidine, S. & Amude, A.B. (2004). A preliminary checklist of the vascular plants of Mozambique. Southern African Botanical Diversity Network Report No. 30 Sabonet, Pretoria Page 15. as Amphineuron opulentum

Jacobsen, W.B.G. (1983). The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Page 401.

Roux, J.P. (2001). Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report 13 Page 122. As Amphineuron opulentum

Roux, J.P. (2009). Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands Page 201.

Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Page 195. As Thelypteris extensa

Verdcourt, B. (2006). Thelypteridaceae F.T.E.A. Royal Botanic Gardens, Kew Page 37. As Amphineuron opulentum (Includes a picture).

Other sources of information about Amblovenatum opulentum:

External websites:

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

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave 2007-23

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2023). Flora of Mozambique: Species information: Amblovenatum opulentum., retrieved 28 November 2023

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