Marsilea - Marsileaceae

Marsilea nubica A. Braun var. gymnocarpa (Lepr. ex A. Braun) Launert

Photo: BT. Wursten
Zimbabwe

Photo: P. Ballings
Zimbabwe

Photo: P. Ballings
Zimbabwe

 

 

 

 

Synonyms

Marsilea gymnocarpa Lepr. ex A. Braun

Common name

Description

Floating form: stipe up to 14 cm long. Leaflets up to 35 mm long, outer margin uneven with shallow indentations. Dry land form: stipe 1.5-6 cm long. Leaflets up to 7 mm long, outer margins entire to very shallowly irregular. Sporocarps: usually single, or crowded at stipe base; very glossy, shiny black, with a few flattened scales when young becoming glabrous with age, smooth with minute dots, with the black outer layer becoming detached and peeling; broadly to narrowly deltate in lateral view, vertical cross-section elliptic; lower tooth absent, upper tooth a slight hump. Sporocarp with its long axis pointing downwards; pedicels up to 3 mm long, free, arising from the axil of the stipe.

Notes

Characteristic for this species is the black, glossy sporocarps, with the outer layer peeling of at maturity.

Derivation

nubica: from Nubia, from north-east africa (Sudan); gymnocarpa: naked fruit, outer layer of sporocarp peels of leaving it "naked" beneath.

Habitat

Acacia or Mopane woodland, in sandy soils or fine clay accumulated in seasonally flooded pans, ponds and pools.

Distribution worldwide

Distribution in Africa

Angola, Botswana, Chad, Namibia, Senegal, Sudan and South Sudan, Tanzania , Zimbabwe.

Growth form

Terrestrial.

Literature

  • Burrows, J.E. (1990) Southern African Ferns and Fern Allies. Frandsen, Sandton. Pages 67 - 68. (Includes a picture).
  • Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011) Ferns of Southern Africa, A comprehensive guide. Struik Nature. Pages 228 - 231. (Includes a picture).
  • Jacobsen, W.B.G. (1983) The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 475 - 476. As M. nubica (Includes a picture).
  • Roux, J.P. (2001) Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report, 13 Page 177.
  • 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 57.
  •