Original Research

Studies in the genus Riccia (Marchantiales) from southern Africa. 5. R. rosea, a new species

O. H. Volk, S. M. Perold
Bothalia | Vol 16, No 2 | a1085 | DOI: https://doi.org/10.4102/abc.v16i2.1085 | © 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 & Water Supply, South Africa

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Abstract

A new species of Riccia, R. rosea Volk & Perold of the group  'Squamatae', section  Riccia. subgenus  Riccia. is described. It is endemic to southern Africa and is characterized by large ventral scales with hyaline margins and reddish pink to deep rose-pink bases, and bv the light green dorsal colour of the thallus. fading to white along the margins and older parts. Fertile male plants have prominent hyaline ostioles. The spores are globular or subglobular and apolar. with 9-11 well defined areolae across the diameter.


Keywords

Marchantiales. <i>Riccia rosea</i>; species nova; southern Africa. ‘<i>Squamatae</i> taxonomy

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