Taxonomic position and identity of Stenocephalum monticola (Vernonieae, Asteraceae)
DEMATTEIS, M.; ANGULO, M. B.
Nationaal Herbarium Nederland
Lugar: Leiden; Año: 2008 vol. 53 p. 621 - 626
The genus Stenocephalum Sch.Bip. (Vernonieae, Asteraceae) includes six South American species that have cylindrical heads, 4--11 florets by capitula, cymose inflorescences and type C pollen. Until now, Stenocephalum monticola (Mart. ex DC.) Sch.Bip. has been considered as a synonym of S. apiculatum (Mart. ex DC.) Sch.Bip. However, the analysis of the type material and additional specimens indicate that it is a quite different species, which differs in leaf size, pubescence and capitula arrangement. Stenocephalum monticola has leaves 9--20 mm long, leaf blades villous at the base and capitula agglomerate at the stems tips, while S. apiculatum presents leaves 30--60 mm long, leaf blades basally glabrous and heads mostly solitary, arranged in a pseudo-spiciform inflorescence. Consequently, in this paper S. monticola is resurrected from the synonymy of S. apiculatum, re-described and illustrated.