Rosularia
Rosularia is a small genus of the family Crassulaceae. It includes about 28-35 species from Europe, the Himalayas, and northern Africa.
Taxonomy
Rosularia was originally described by De Candolle as a section of the genus Umbilicus, and raised to the level of genus by Stapf Thus the genus bears the botanical authority Stapf of both authors.In 1930, Berger included it in family Crassulaceae subfamily Sedoideae, as one of 9 genera. He further divided it into two sections and further series, transferring some species of Sedum to it. Since then, a number of species have been transferred in and out of the genus, including S. sempervivoides, which at one stage was placed in Prometheum. The genus Sempervivella was submerged in Rosularia. The genus is now placed within the Leucosedum clade, tribe Sedeae, subfamily Sempervivoideae of the Crassulaceae, but is embedded within Sedum paraphyletically.
Species
Rosularia contains about 28 species. The following species and subspecies were accepted by The Plant List :Rosularia adenotricha C.-A. Jansson- * Rosularia adenotricha subsp. viguieri C.-A. JanssonRosularia aizoon A. BergerRosularia alpestris Boriss
- * Rosularia alpestris subsp. marnieri Eggli Rosularia blepharophylla Eggli Rosularia borissovae U.P.Pratov Rosularia chrysantha Takhtajan Rosularia cypria MeikleRosularia davisii Muirhead Rosularia elymaitica A. Berger Rosularia glabra A.Berger Rosularia globulariifolia A. Berger Rosularia haussknechtii A. Berger Rosularia jaccardiana H. Ohba Rosularia libanotica Sam. Rosularia lineata A.Berger Rosularia lutea Boriss. Rosularia pallida Stapf Rosularia pallidiflora Meikle Rosularia persica A. Berger Rosularia pilosa Boriss. Rosularia platyphylla A.Berger Rosularia radicosa Eggli Rosularia rechingeri C.-A. Jansson Rosularia rosulata H. Ohba Rosularia schischkinii Boriss. Rosularia sedoides H. Ohba Rosularia semiensis H. Ohba Rosularia sempervivoides Boriss. Rosularia serpentinica Muirhead Rosularia serrata A.Berger Rosularia subspicata Boriss.