Original Research

Studies in the genus Riccia (Marchantiales) from southern Africa. 25. A new species in subgenus Ricciella, section Ricciella

S. M. Perold
Bothalia | Vol 31, No 2 | a513 | DOI: https://doi.org/10.4102/abc.v31i2.513 | © 2001 S. M. Perold | This work is licensed under CC Attribution 4.0
Submitted: 17 September 2001 | Published: 17 September 2001

About the author(s)

S. M. Perold, National Botanical Institute, South Africa

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Abstract

Riccia sibayenii Perold is a new species, recently collected in Mpumalanga, near Sibayeni and has been named for this town, which is close to the Mozambique border and is in the summer rainfall area.  R. sibayenii is distinguished by lime- green, medium-sized to quite large thalli with a chlorophyllose dorsal epidermis, air pores that soon enlarge and lead into mostly 6-sided air chambers below; ventrally with a thin median layer of storage tissue; ventral scales absent and the rhizoids all smooth. The spores are winged and polar, the distal face completely or incompletely reticulate and the proxi­mal face ornamented with fine to coarse, sometimes spinose granules.


Keywords

Marchantiales; Riccia sibayenii Perold; section <i>Ricciella</i> (A.Br.) Bisch.; subgenus <i>Ricciella</i>; southern Africa

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Crossref Citations

1. Recent Literature on Bryophytes—105(2)
William R. Buck, Bruce Allen, Ronald A. Pursell
The Bryologist  vol: 105  issue: 2  first page: 276  year: 2002  
doi: 10.1639/0007-2745(2002)105[0276:RLOB]2.0.CO;2