A new species of Gymnanthemum (Compositae, Vernonieae) from South Africa is described. It can be distinguished from other species in the genus by the five-flowered capitula and widely obtuse leaf blades.

The mating systems of species in small or fragmented populations impact upon their persistence. Small self-incompatible (SI) populations risk losing S allele diversity, responsible for the SI response, by drift thereby limiting mate availability and leading to population decline or SI system breakdown. But populations of relict and/or endemic species have resisted these demographic conditions o...

Eucalyptus plantations are frequently used for the establishment of bee yards. This study was carried on at Fazenda Brejão, northwestern region of the State of Minas Gerais, Brazil. This farm is covered both with native Cerrado vegetation (Brazilian savanna) and eucalyptus plantations. This paper reports on the botanic origin of pollen pellets and honey collected from honeybee (Apis mellifera) ...

A series of brief notes on distribution of vascular plants alien to Kyrgyzstan is presented. A further expansion of Anthemisruthenica (Asteraceae), Crambeorientalis (Brassicaceae) and Salviaaethiopis (Lamiaceae) in northern and northwestern Kyrgyzstan is recorded. The first record of Chenopodiumvulvaria (Amaranthaceae) from the northern side of Kyrgyz Range is confirmed, and the species was fou...

Phytomelanin is a mechanically hard, blackish, and inert substance rarely found in plants. In Asteraceae, this was historically associated with the Heliantheae alliance, but recent studies have observed it unrelated groups as Heterocoma Wunderlichia. During taxonomic investigation, we phytomelanin cypselae of Lychnophora salicifolia an unusual feature Vernonieae previously only Heterocoma. Furt...

THE GENUS Hesperomannia (Compositae, tribe Mutisieae) has attracted interest because of its arborescent habit, its restriction to certain of the Hawaiian Islands, and its rarity in the locations in which it is found. The purpose of the present paper is to survey the anatomical diversity which exists in the genus and relate it to gross morphological characters in an attempt to achieve an accepta...

Lasthenia californica sensu Ornduff consists of two races that differ in their flavonoid pigments and edaphic tolerances. Recent phylogenetic studies of Lasthenia have revealed that members of L. californica sensu Ornduff belong to two phylogenetic species. The relationship of the edaphic races to these new species and to each other is the focus of this study. Characterization of flavonoid prof...

A novel flavonoid C-glycoside, 5-hydroxy-7-methoxy-6-C-glycosylflavone (1), was isolated from the aerial part of Sphaeranthus indicus. Its structure was elucidated by spectroscopic methods.