Cheilanthes - Sinopteridaceae

Cheilanthes nielsii W.Jacobsen

 

 

 

 

Synonyms

Common name

Description

Rhizome short, erect, 2-4 mm in diameter; rhizome scales linear in outline, margin entire, up to 6 mm long, castaneous, shiny. Fronds monomorphic, tufted, up to 17.5 cm long, erect to slightly arching, softly herbaceous. Stipe thin, filiform, 1-3 cm long, reddish to cataneous, set with pale, ferrugineous or white glandular hairs, c. 0.5 mm long and with concolorous pale brown to castaneous lanceolate scales of 3-4 mm long at the base. Lamina deeply 2-pinnatifid to 2-pinnate, oblong to oblong-elliptic in outline, basal pinnae reduced in size, 7.5-14 x 2.5-5.3 cm; pinnae 7-8 pairs, oblong-deltate in outline, apex rounded, up to 2.7 x 2.1 cm; pinnules oblong in outline, apex rounded, shallowly lobed with marginal glandular hairs, 0.6-1 x 0.25-0.5 cm, concolorous green, sparsely set with whitish hairs on both surfaces; rhachis and costae reddish-brown, set with spreading capitate hairs similar to those of the stipe on both surfaces. Sori marginal, discrete, set beneath the slightly inrolled margin; indusium absent.

Notes

Derivation

nielsii: named after Mr. Niels Jacobsen, nature conservator, ecologist and herpetologist, who discovered this fern in the Transvaal.

Habitat

On rocky hillsides around the base of boulders and on rock ledges, in shade or partial sun.

Distribution worldwide

See African distribution.

Distribution in Africa

Botswana, Namibia, South Africa.

Growth form

Lithophytic, terrestrial.

Literature

  • Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011) Ferns of Southern Africa, A comprehensive guide. Struik Nature. Pages 362 - 363. (Includes a picture).
  • Jacobsen, W.B.G. (1983) The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 252 - 254. (Includes a picture).
  • 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 184.
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