Authors: Bacigalupo, Nelida M.; Cabral, Elsa L.; Cabaña Fader, Andrea A.

Source: Plant Ecology and Evolution, Volume 143, Number 1, March 2010 , pp. 100-104(5)

Publisher: National Botanic Garden of Belgium and Royal Botanical Society of Belgium

Abstract:

Background and aims - The identity of Diodia assurgens K.Schum. is unclear and the taxon has never been studied in detail since its description. In the present paper we aim to clarify its status and taxonomic position.

Methods - Normal practices of herbarium taxonomy have been applied to study all herbarium material available. Pollen of Diodia assurgens and Diodia s.str. species was studied using the acetolysis method.

Key results - The comparative morphological study clearly shows that Diodia assurgens K.Schum belongs to the genus Spermacoce s.str. and that it should be excluded from Diodia s.str. The new name Spermacoce spiralis Bacigalupo & E.L. Cabral is proposed and a lectotype is designated. The species is also described and illustrated. The palynological characters of Spermacoce spiralis agree well with those observed in other species of Spermacoce s.str.

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Keywords: DIODIA; RUBIACEAE; SPERMACOCE; SPERMACOCEAE

Document Type: Research article

DOI: http://dx.doi.org/10.5091/plecevo.2010.389

Publication date: 2010-03-01

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• Plant Ecology and Evolution (a continuation of Belgian Journal of Botany, incorporating Systematics and Geography of Plants) is an international journal devoted to ecology, phylogenetics and systematics of all 'plant' groups in the traditional sense (including algae, cyanobacteria, fungi, myxomycetes), also covering related fields such as comparative and developmental morphology, conservation biology, ecophysiology, evolution, phytogeography, pollen and spores, population biology, and vegetation studies. It contains original research papers, review articles, short communications and book reviews.

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