Studies in the genus Riccia (Marchantiales) from southern Africa. 11. Riccia montana and R. alboporosa, a further two new white-scaled species of the group ‘Squamatae’ | Zendy

S. M. Perold | Zendy

Open Access

Studies in the genus Riccia (Marchantiales) from southern Africa. 11. Riccia montana and R. alboporosa, a further two new white-scaled species of the group ‘Squamatae’

Author(s) -

S. M. Perold

Publication year - 1989

Publication title -

bothalia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.457

H-Index - 20

eISSN - 2311-9284

pISSN - 0006-8241

DOI - 10.4102/abc.v19i1.934

Subject(s) - subgenus , botany , dorsum , genus , biology , operculum (bryozoa) , taxon , anatomy

Another two new endemic species of the subgenus Riccia. section Riccia. group ‘Squamatae , are described: R. montana and R alboporosa. The distribution of R montana is apparently restricted to high altitudes in the Drakensberg and Witteberg Mountain ranges. The species is characterized by ligulate branches, finely spongy dorsal surface and hyaline to white, calcium-encrusted scales. R alboporosa is found in Namaqualand. but it is rare It can be recognized by the distinctly porous appearance of the dorsal surface due to the presence of large. ± regularly spaced air pores, which are encircled by six or seven radially arranged, wedge-shaped cells that become white on drying, hence the specific epithet.