References are made to cytotoxic and/or antitumor compounds that have been isolated ansamitocin P-3 from Claopodium crispifolium (Hook.) Ren. & Card. and Anomodon attenuatus Hueb., or an associated actinomycete, and ohioensins and pallidisetums from Polytrichum spp. Several hundred collections, which have been obtained from temperate regions of North America during 1990 and 1991, are currently ...

(Rock outcrop vegetation in Brazil: a brief overview). This paper overviews the special issue of the Brazilian Journal of Botany dedicated to “Rock outcrop vegetation in Brazil”. The main topics covered by this issue are phytogeography and vegetation ecology, plant life on shallow soils, plant reproduction and auto-ecology, morpho-physiology and plant adaptation, and finally conservation and gl...

PREMISE OF THE STUDY Microsatellite primers were developed for Paeonia delavayi and P. ludlowii (Paeoniaceae) to study their population genetics and phytogeography. METHODS AND RESULTS Nine polymorphic nuclear microsatellite loci were isolated from an enriched library of P. delavayi and primers were designed. The number of alleles per locus ranged from two to 16; the observed and expected het...

Biogeography is a strange discipline. In general, there are no institutes of biogeography; there are no departments of it. There are no professional biogeographers no professors of it, no curators of it. It seems to have few traditions. It seems to have few authoritative spokesmen. It is my belief, however, that there is a coherent history of the discipline. There are some general ideas some pr...

Abstract For the first time in Kruglaya Bay of Black Sea, 25 taxa Bacillariophyta from 17 genera were found, three them new for Crimea and Sea Halamphora tenerrima , Amphora tenuissima Navicula antonii . Marine (40%), coastalbrackish (32%) boreal-tropical (32%), arctic-boreal-tropical (24%), boreal cosmopolitan (20% 16%, respectively) prevailed. The morphological characteristics species SEM (sc...