Morphological and anatomical investigations on Turkish endemic Hieracium lasiochaetum (Bornm. & Zahn) Sell & West (Asteraceae)

Abstract

In this study, morphological and anatomical characteristics of Hieracium lasiochaetum (Bornm. & Zahn) Sell & West, an endemic species, were investigated. Morphological features like leaf shape, stylus colour and indumentum were found to be as taxonomically important in this species. In anatomical investigations, cross-sections of the root, stem, leaf and petiole and the surface sections of leaves were examined. It has been observed that stem and petiole have a distinct collenchyma layer. The leaf is dorsiventral (bifacial) and hypostomatic. Stoma cells are anomocytic. Additionally, seeds and trichomes of the species were examined by scanning electron microscope (SEM). The primary sculpture of the achenes appears to be reticulate type. Trichomes type are simple or stellate eglandular and glandular.