Anatomical and micromorphological studies on Teucrium sect. Isotriodon (Lamiaceae) in Turkey with a taxonomic note

Abstract

In this study, the anatomical features of the leaf and stem, besides the nutlet characteristics of some Teucrium sect. Isotriodon (Lamiaceae) taxa in Turkey, T. montbretii Betham subsp. montbretii, T. montbretii subsp. pamphylicum P. H. Davis, T. odontites Boiss. & Bal., T. cavernarum P. H. Davis, T. antitauricum T. Ekim, along with an isolated population of T. montbretii (T. montbretii subsp.) were investigated. The anatomical studies revealed that the taxa share generally similar anatomical characters, such as thicker upper leaf cuticles and larger upper leaf epidermal cells compared to lower ones and diacytic to anomocytic stomata on the leaves. However, the portion of the mesophyll occupied by palisade parenchyma and the occurrence of mucilage cells in leaf epidermis shows difference among the taxa. Furthermore, the studied taxa have general stem characteristics of the Lamiaceae family, except for having poorly developed collenchyma at the corners. With the amphistomatic leaves and developed sclerenchymatic tissue in the leaf median vein, T. cavernarum is seperated from the other taxa. Trichome types on the vegetative organs and nutlet shape and sculpturing are generally the same or similar in the studied taxa, but trichomes on the nutlets are different among them. Based on nutlet characteristics and some morphological ones, it was revealed that the isolated population of T. montbretii represent a new subspecies, T. monbretii subsp. yildirimlii M.Dinç & S.Dogu subsp. nov.

Determination of the chemical composition and antimicrobial activity of the essential oils ofTeucrium poliumandAchillea millefoliumgrown under North Anatolian ecological conditions

“…[9] The genus Teucrium (L.), which belongs to the family Lamiaceae, is represented by about 300 species in the world and has a cosmopolitan distribution, mainly in Europe, North Africa and in the temperate parts of Asia. [10] Teucrium polium (L.) is widely used in the folk medicine for many treatment interventions. [11,12] Teucrium species have been used as medicinal plants for more than 2000 years and some of them are still used in the folk medicine as antispasmodics, tonics, antipyretics and antiseptics.…”

Micromorphological characters on nutlet and leaf indumentum ofTeucrium sect. Teucrium (Lamiaceae) in Turkey

“…Teucrium was represented by 27 species in Flora of Turkey and the East Aegean Islands (Ekim, 1982). Since then many new species and subspecies have been described in Turkey and their current number is 34 (46 taxa, 16 of which are endemic) (Duman, 2000;Dönmez, 2006;Dönmez et al, 2010;Dinç and Doğu, 2012;Dirmenci, 2012). Teucrium has been divided into 8 sections, distinguishable from each other by their calyx shape and inflorescence structure (Ekim, 1982).…”

Identification of the Herbal Drug Prunellae spica based on Macroscopic and Microscopic Characteristics

“…According to the new classification, the Lamiaceae family comprises seven subfamilies, about 230 genera and over 7.000 species with international distribution, but are rare or absent from highaltitudes and cold regions. Many species of this family are economically important due to the production of volatile oil (Tamaș, 1999;Dinç et al, 2009;Dınç and Dogu, 2012). The Prunella genus is a member of the Lamiaceae family, Nepetoideae subfamily.…”