Original Research

Studies in the genus Riccia (Marchantiales) from southern Africa. 4. Three endemic species, R. natalensis, R. microciliata sp. nov. and R. mammifera sp. nov.

O. H. Volk, S. M. Perold
Bothalia | Vol 16, No 2 | a1084 | DOI: https://doi.org/10.4102/abc.v16i2.1084 | © 1986 O. H. Volk, S. M. Perold | This work is licensed under CC Attribution 4.0
Submitted: 23 October 1986 | Published: 28 October 1986

About the author(s)

O. H. Volk, Botanische Anstalten d. Univ., Germany
S. M. Perold, Botanical Research Institute. Department of Agriculture and Water Supply, South Africa

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Abstract

Three endemic species of the group  'Ciliatae' (subgenus  Riccia sectio  Riccia) are dealt with. The description of R. natalensis Sim is emended, as Sim's original description (1926) was sketchy and Arnell (1963) had no fresh material to examine, which resulted in some inaccurate observations: R. microciliata Volk & Perold is a diminutive new species w'ith conspicuous, arched marginal and occasionally dorsal cilia, whereas  R. mammifera Volk & Per­old. another new species, has enlarged cells (or short cilia) along the thallus margins.


Keywords

‘<i>Ciliatae</i>’. Marchantiales. <i>Riccia species</i>; southern Africa; taxonomy

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