Authors
Evgeny V Mavrodiev, Christine E Edwards, Dirk C Albach, Matthew A Gitzendanner, Pamela S Soltis, Douglas E Soltis
Publication date
2004/8
Journal
Taxon
Volume
53
Issue
3
Pages
699-712
Description
Subtribe Scorzonerinae of tribe Lactuceae (Asteraceae: Cichorioideae) appears to be well supported as monophyletic; however, generic circumscription and relationships within the group have been problematic. To investigate the monophyly and circumscription of the recognized genera and their intergeneric relationships, we conducted a phylogenetic analysis of subtribe Scorzonerinae using ITS sequence data. Our results reveal that most genera, including Tragopogon, Epilasia, Podospermum, Koelpinia, and Lasiospora, are monophyletic. The monotypic Pterachaenia and Tourneuxia are distinct lineages within Scorzonerinae. The monotypic Geropogon, which has often been included in Tragopogon, is phylogenetically removed from the highly supported Tragopogon clade. In contrast, Scorzonera is clearly not monophyletic, with species of the genus appearing in multiple clades with other genera. Scorzonera …
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