Morphometric analyses and new taxonomic circumscription of South American species of Flourensia (Asteraceae, Heliantheae, Enceliinae)

Flourensia (Asteraceae, Heliantheae, Enceliinae) is an amphitropical genus of resinous subshrubs, shrubs and small trees with 13 North American and 20 South American species among which disagreement on the species limits of some members still exists. To resolve the taxonomy of the South American tax...

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Bibliographic Details
Published in:Nordic journal of botany 2018-06, Vol.36 (6), p.n/a
Main Authors: Ospina, Juan C., Aagesen, Lone, Ariza Espinar, Luis, Freire, Susana E.
Format: Article
Language:English
Subjects:
Asteraceae
cluster analysis
Clustering
Compositae
Flourensia
integrative taxonomy
Ordination
PCoA
Resins
Shrubs
Species
Synonymy
systematics
Taxonomy
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Summary:Flourensia (Asteraceae, Heliantheae, Enceliinae) is an amphitropical genus of resinous subshrubs, shrubs and small trees with 13 North American and 20 South American species among which disagreement on the species limits of some members still exists. To resolve the taxonomy of the South American taxa, we carried out a combination of clustering (Ward's method with Gower distance coefficient) and ordination analyses (Principal Coordinate Analyses) based on 34 vegetative and reproductive characters scored from herbarium material, including types. Based on the results, we recognize 12 South American species: F. angustifolia, F. cajabambensis, F. fiebrigii, F. heterolepis, F. hirtissima, F. macrophylla, F. niederleinii; F. peruviana, F. polycephala, F. thurifera, F. tortuosa and F. suffrutescens. A number of species are placed in synonymy: Flourensia blakeana and F. hirta are synonymized under the name F. fiebrigii; Flourensia campestris, F. leptopoda, F. oolepis and F. riparia are synonymized under F. thurifera; Flourensia macroligulata is synonymized under F. tortuosa, and Flourensia polyclada is synonymized under F. suffrutescens. A taxonomic treatment of four redefined species as well as a key and distribution maps to all South American Flourensia species are provided.
ISSN:0107-055X
1756-1051
DOI:10.1111/njb.01737