The Taxonomic Significance of ducts in the corolla lobes of Vernonia (Vernonieae: Asteraceae)

By

Robinson, Harold Ernest, 1932-
Yankowski, Stanley

Type

Article

Date of Publication

2016

Original Publication

PhytoKeys

Volume

58

Pages

1-7

Subjects

corolla lobes , Ducts , Trepadonia , Vernonanthura , Vernonia

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.58.7009

 

Abstract

The multiple longitudinal ducts in the corolla lobes found in the closely related genera Vernonia, Vernonanthura and Trepadonia are microscopically studied and illustrated. The lack of such ducts in the two South American species that have until now been retained in Vernonia indicates that they should probably be excluded from the genus.