An unusual feature occurs in the capitula of Leucheria (Nassauvieae, Asteraceae), some phyllaries of the involucre are twisted and/or rotated. The different spatial orientations of these phyllaries, called here paleaceous ...

Lepidaploa belongs to the Vernonieae tribe, one of the most complex tribes of Asteraceae. Nowadays, the relationship between Lepidaploa and its related genera is poorly understood. Different microcharacters might be of ...

A detailed analysis of the type material of Vernonia oxyodonta clearly indicates that it is morphologically identical to Lessingianthus glabratus because it has glabrous leaves, pedunculate heads at the end of the ...

In this study, three species of Lessingianthus saltensis complex are described and illustrated, including two new species. The new taxa L. membranifolius and L. coriarius are diploid (2n = 2x = 32), while L. saltensis is ...

Two new species of the South American genus Lessingianthus (Asteraceae: Vernonieae) are described and illustrated. One of these species, Lessingianthus arctatus, bears a resemblance to L. linearis (Spreng.) H.Rob. and L. ...

The small Neotropical tribe Liabeae (Compositae) is currently classified into four subtribes: Liabinae, Munnoziinae, Paranepheliinae, and Sinclairiinae. As currently accepted, Paranepheliinae includes seven genera, ...

Recent botanical explorations in western Mexico, as part of a taxonomic revision and a phylogenetic analysis of the genus Cosmos, have resulted in the discovery of two new species. The novelties belong to Cosmos section ...

Gamochaeta beckii, a new species found in La Paz, Bolivia is described and illustrated. Gamochaeta beckii is similar to G. purpurea but it is easily distinguished by stems branched from the base to the inflorescence, ...

Lessingianthus concepcionis, a new species from northern Paraguay is described and illustrated. The new species has a certain resemblance to L. niederleinii but can be easily separated by the combination of leaves ...