Senecio ser. Otopteri (Asteraceae): new molecularhypotheses

MENDOZA F. T.; FREIRE S. E.; POZNER R. E.; BECK S.; URTUBEY E.

Madrid

Congreso; XX International Botanical Congress; 2024

Series Otopteri (Senecio ) comprises 14 species: S. attenuatus, S. bangii, S. belenensis, S. deferens, S. herrerae, S. kosterae, S.lorentzii, S. otites, S. otopterus, S. pensilis, S. pseudotites S. sepium, S. sinapoides and S. tucumanensis mainly distinguished by itslower leaves with well-differentiated petiole, usually auriculate or decurrent along the stem. Previous molecular studies of Seneciousing ITS marker, only included S. bangii, S. deferens , and S. otites in the phylogeny of Senecioneae, in which S. deferens remainsincluded in Senecio s. str. and S. bangii and S. otites are remotely related to the core of Senecio . Our investigation using 8 of the 14species of seriesOtopteri and markers (ITS and ETS) shows: 1. Senecio deferens, S. otopterus and S. sepium belong to series Otopteri ; 2. Senecio lorentzii, S. pensiles, S. pseudotites would be excluded from this series but belong to Senecio s. str.; 3. Theexclusion of Senecio otites and S. bangii (=Lomanthus bangii) from Senecio s. str. was confirmed by our results. Finally, wepropose S. otopterusas the type species for series Otopteri .