Morphometric studies and taxonomic delimitation in Menonvillea scapigera and related species (Cremolobeae: Brassicaceae).

SALARIATO, D.L.; F.O. ZULOAGA; I. AL-SHEHBAZ

PLANT SYSTEMATICS AND EVOLUTION

SPRINGER WIEN

Lugar: Viena; Año: 2013

0378-2697

Previous systematic treatments of Menonvillearecognized a group of six morphologically related species,the ?M. scapigera group,? distinguished by having pinnatelylobed leaves and united filaments of median staminalpairs. The number of recognized species ranged fromsix to two, one with three subspecies. In order to clarify thetaxonomy of this group, multivariate and univariate analysesof qualitative and quantitative characters from herbariumspecimens were performed. Additionally, to test themorphological results, the phylogenetic relationships anddegree of exclusive ancestry were studied using ITSsequences and the genealogical sorting index. Our resultssupport the recognition of three species (M. famatinensis,M. hirsuta, M. scapigera) delimited by a unique combinationof qualitative characters. Quantitative characterssupport the division of the latter species into two subspecies:scapigera and longipes. The molecular data are congruentwith the morphology and support the inclusion ofM. hookeri within M. scapigera. A key to taxa of theM. scapigera group is presented.