Marsilea - Marsileaceae

Marsilea schelpeana Launert

 

 

 

 

Synonyms

Common name

Description

Floating form: stipe up to 24 cm long. Leaflets obovate to obdeltate in outline, hairless, outer margin rounded, usually entire. Dry land form: stipe 1.5-10 cm long. Leaflets narrowly obdeltate in outline, 4-7 x 3-4 mm, outer margins bilobate to deeply incised, slightly hairy when young. Sporocarps: several or solitary, 6-8 x 4-5 mm; asymmetrically elliptic to oblong, dorsally straight, ventrally convex, narrowly elliptic in dorsoventral cross-section; densely set with appressed long hairs, very dark brown; lower tooth absent or inconspicuous, upper tooth prominent, sharply acute, usually somewhat curved. Sporocarp set at an angle of 140° to the pedicel; pedicels 15-45 mm long, erect, rather twisted, free, arising from the stipe a few mm above the rhizome, occasionally arising from the axil of the stipe.

Notes

Distinguished by the obtuse angle of the sporocarp to the pedicel, the prominent and sharply pointed upper tooth, also the pedicel is attached to the stipe base a few millimeters up from the rhizome.

Derivation

schelpeana: for Prof. E.A.C.L.E. Schelpe (1924-1985), South African botanist and plant collector, fern expert.

Habitat

Along margins of seasonal pools oor dams, along watercourses, along coastal plain of the Western and Eastern Cape to which it is endemic.

Distribution worldwide

See African distribution.

Distribution in Africa

South Africa.

Growth form

Aquatic, 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 252 - 253. (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 58.
  •