Scutellaria brevibracteata subsp. subvelutina (Rech.f.) Greuter & Burdet: morphological and phytochemical characterization

https://doi.org/10.1080/14786419.2020.1761363 A micromorphological and phytochemical survey was performed on Scutellaria brevibracteata subsp. subvelutina (Lamiaceae) cultivated in Italy. The indumentum of the vegetative and reproductive organs was investigated: peltate, short-, medium- and long-stalked capitates were described. Histochemistry evidenced similar results for the peltates and the long-stalked capitates, differences for short and medium capitates. For the first time, this work reported the leaf and flower VOC characterization, together with the first analysis of the EO obtained from the aerial parts of Italian samples. The floral profile resulted more complex than the foliar one, due to the higher number of the total compounds (40 vs 27) and of the exclusive constituents (24 vs 11). 16 common compounds were detected, with β-caryophyllene as the most abundant one. The EO was characterized by 23 compounds, among which β-caryophyllene dominated. The peltates, the medium and the long-stalked capitates resulted the producers of the investigated compounds.