A new species, Echeveria coruana, is described and illustrated from the malpaís near San Andrés Corú, Michoacan, Mexico. The species belongs to series Gibbiflorae and the new taxon was compared with Echeveria purhepecha and Echeveria patriotica, with whom it shares the closest morphological affinities. Additionally, Echeveria yalmanantlaensis an endangered species from Sierra of Manantlán Biosp...

The genus Penthorum L. consists of two species of perennial herbs, P. sedoides of eastern North America and P. chinense of eastern Asia. Pent ho rum has long been considered intermediate between Crassulaceae and Saxifragaceae. An anatomical study of both species was undertaken to contribute to a better understanding of the relationships of these plants. Prominent anatomical features of Penthoru...

Klein, D.-P., R. Shtein, L. Nusbaumer & M.W. Callmander (2021). Kalanchoe darainensis (Crassulaceae), a new species from northeastern Madagascar. Candollea 76: 117–123. In English, English and French abstracts.A of small, rosulate upright-flowered Adans. (Crassulaceae) Madagascar is described illustrated: D.-P. Klein Callm. Morphologically, most similar to blossfeldiana Poelln. globulifera H. P...

Department of Animal Biology, P.O.Box 67 Dschang, University of Dschang, Cameroon Institut of Pharmacology and Toxicology, Technical University of Munich, Biedersteiner strasser 29, 80802 munich, Germany Department of Animal Biology and Physiology, P.O.Box 24157 Douala, University of Douala, Cameroon Department of Animal Biology and Physiology, P.O.Box 812 Yaounde, University of Yaounde I, Came...

The genus Penthorum L. consists of two species of perennial herbs, P. sedoides of eastern North America and P. chinense of eastern Asia. Penthorum has long be.en considered intermediate between crassulaceae and Saxifragaceae. An anatomical study of both species was undertaken to contribute to a better understanding of the relationships of these plants. Prominent anatomical features of Penthorum...

PREMISE OF THE STUDY Differences in rarity among species can be caused by adaptation to local conditions along with correlated evolution in characters that limit geographic range size. For this kind of divergence, the resulting species differ in their ability to thrive in varying environments. Because rare species are more prone to extinction than widespread species, trade-offs in life history ...