On some poorly known taxa of Aichryson sect. Aichryson and A. bituminosum sp. nova (Crassulaceae)

Abstract

Chorological and taxonomic data on three poorly known species of the genus Aichryson on the Canary Islands, A. bollei, A. brevipetalum and A. porphyrogennetos, are provided. A. bituminosum from Gran Canaria, Canary Islands, is described as a species new to science and illustrated. Illustrations and emended descriptions are also given for A. bollei and A. brevipetalum, and a key to all pubescent-leaved species of A. sect. Aichryson is provided.