Amblovenatum - Thelypteridaceae

Amblovenatum opulentum (Kaulf.) J.P.Roux

 

 

 

 

Synonyms

Amphineuron opulentum (Kaulf.) Holttum
Aspidium opulentum Kaulf.
Nephrodium wakefieldii Bak.
Thelypteris extensa (Bl.) Morton
Thelypteris opulenta (Kaulf.) Fosberg

Common name

Description

Rhizome erect or short-creeping, branched; rhizome scales dark brown, apex gradually tapering to a point, margin minutely ciliate, ± 9 mm long. Fronds tufted, 0.9–0.5 m tall. Stipe 40–70 cm long, minutely set with short hairs and with scales at base. Lamina bipinnatifid, broadly oblong-ovate in outline, 0.8–1 x 0.6 m, the basal pinnae not or rarely reduced; largest pinnae narrowly oblong in outline, apex tapering to a point, 25–35(–40) x 2.5–2.9(–3.5) cm, hairy above on costa, with short hairs and yellow glands beneath (particularly along veins), deeply lobed; lobes narrowly oblong, oblique, slightly falcate, 1.2 x 4–5 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 coalescing to form lines parallel to lobe margins; indusia with small yellow glands on edges and often hairy (in extra-African material).

Notes

Derivation

Habitat

Evergreen forest on slopes, streamside in deep shade, Pandanus swamp with numerous calcareous outcrops.

Distribution worldwide

Africa (also Mozambique?), Chagos Archipelago, Seychelles, tropical Asia and Maleisia to N Queensland, eastwards to the Society Isl. and Marquesas.

Distribution in Africa

Kenya, Tanzania .

Growth form

Terrestrial.

Literature

  • Roux, J.P. (2009) Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands. Strelitzia 23, South African National Biodiversity Institute, Pretoria. Page 201.
  • Verdcourt, B (2006) Thelypteridaceae. Flora of Tropical East Africa, Pages 36 - 37. As Amphineuron opulentum (Kaulf.) Holttum (Includes a picture).
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