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

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 shou...

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Published in:PhytoKeys 2016-01, Vol.58 (58), p.1-7
Main Authors: Robinson, Harold, Yankowski, Stanley
Format: Article
Language:English
Subjects:
Asteraceae
Flowers
Genera
Identification and classification
Physiological aspects
Taxonomic significance
Vernonia
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description 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.
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subjects Asteraceae
Flowers
Genera
Identification and classification
Physiological aspects
Taxonomic significance
Vernonia
title The Taxonomic Significance of ducts in the corolla lobes of Vernonia (Vernonieae: Asteraceae)
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