Stem and leaf anatomy and achene structure in some species of Senecio (Asteraceae)

Abstract

The genus Senecio L. belongs to the tribe Senecioneae Cass. of the family Asteraceae which is the richest plant family of Turkey in terms of endemic species. The study was conducted on a total of 8 taxa belonging to Senecio. 4 taxa were collected from West and 4 were collected from East Anatolia. Stem and leaf anatomy of the taxa were studied by light microscopy; achene structure was examined by light microscopy and transmission electron microscopy in order to identify morphological, anatomical and histological modifications and resolve taxonomic problems of the genus.