New Species and Combinations in Vernonia Sections Leiboldia and Lepidonia (Asteraceae), with a Revisional Conspectus of the Groups
- 1 July 1981
- journal article
- research article
- Published by Springer Nature in Brittonia
- Vol. 33 (3) , 401-412
- https://doi.org/10.2307/2806430
Abstract
The wholly North American sectionLeiboldia ofVernonia as revised by Jones (1979) included six species. The present treatment recognizes only three species inLeiboldia, including one newly described from recent collections. The remainder of what Jones consideredLeiboldia has been transferred into a new sect.Lepidonia (Blake) Turner which was first proposed as a monotypic genus. A key to the two sections and 10 species is provided along with an account of their interrelationships. Morphological evidence suggests that sect.Lepidonia is one of the more primitive sections ofVernonia, being as close to certain African sections as they are to the mostly American sect.Vernonia. Consideration is given to the phyletic significance and generic value of receptacular pales in the Vernonieae from which it is concluded that these have persisted in three or more quite unrelated lines of this tribe and undue weight should not be accorded these in generic considerations. Consequently, the paleaceous, monotypic generaLepidonia andBolanosa are sunk into synonymy underVernonia, the former as a distinct section, the latter into the sect.Vernonia.This publication has 2 references indexed in Scilit:
- Chromosome Numbers of Vernonieae (Compositae)Bulletin of the Torrey Botanical Club, 1979
- Notes on the Classification, History, and Geographical Distribution of Compositae.Journal of the Linnean Society of London, Botany, 1873