Selaginella grisea Alston
Lycopodium dregei C. Presl.
Stems creeping, branched, rooting freely, mat-forming. Leaves overlapping around stem and branches, monomorphic, 1.5-2.0 × 0.15-0.25 mm, greyish to greyish-green turning silvery grey when dry, narrowly oblong to lanceolate in outline, margins ciliate, tips tapering to a point, with a curved white hair-like seta, one third to a quarter of the length of the blade.
Strobili rarely develop, 4-8 mm long, suberect, with sporophylls terminal in 2 ranks, broader and more lanceolate than the leaves, ciliate and tapering to a point.
S. dregei can be confused with S. caffrorum and S. nivea, these however have leaves with a shorter apical seta (less than a third of the leaf blade) and sporophylls that are arranged in 4 ranks.
dregei: named after Johann Franz Drège (1794-1881), German horticulturalist, botanical collector and explorer who worked extensively in South Africa.
Terrestrial or lithophytic, forming dense mats occupying flat sheetrock in open and under scrub, in deciduous woodland and montane areas.
Distribution in Africa
Angola, Botswana, Democratic Republic of Congo, Kenya, Malawi, Mozambique, South Africa, Swaziland, Tanzania , Uganda, Zambia, Zimbabwe.
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Jacobsen, W.B.G. (1983) The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 143 - 144. (Includes a picture).
Kornas, J. (1979) Distribution and ecology of the Pteridophytes in Zambia. Polska Akademia Nauk Wydzial II Nauk Biologicznych. Pages 31 - 32.
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 22.
Roux, J.P. (2001) Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report, 13 Page 25.
Schelpe, E.A.C.L.E. (1970) Pteridophyta. Flora Zambesiaca, 0 Page 23. (Includes a picture).