Taxonomic reinstatement of Teucrium andrusi from T. paederotoides based on morphological and anatomical evidences

Abstract

Teucrium andrusi, described by Post from Mardin province, Turkey, was synonimized with T. paederotoides in the flora of Turkey. According to the records in the flora of Turkey T. paederotoides was a steno‐endemic species, only known from the type locality in Gaziantep and from Mardin province. Specimens of T. paederotoides s.l. were collected from both localities and a detailed comparison of the plants from Gaziantep with those from Mardin revealed that the two populations were sufficiently distinct from each other to be recognised as separate species. Thus, T. andrusi Post is reinstated from the synonymy with T. paederotoides. Teucrium andrusi is morphologically different from T. paederotoides s.s. in terms of its general indumentum, leaf margin, bract and calyx shape, corolla colour and nutlet macro–micromorphology. It can be anatomically distinguished from T. paederotoides s.s. by stoma type, stomatal distribution on the leaf surface, crystal content in the cells and cuticula thickness. Ecological data related with the accompanying species also support species status for T. andrusi. While the two taxa are very similar in pollen and nutlet morphology, trichome density on the nutlets are different.

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

“…in Teucrium sect. Isotriodon (Dinç et al 2011a). But, this study showed that the studied taxa generally exhibit anatomical homogeneity with regard to stem and leaf anatomy (Table 2).…”

“…Twelve species and two subspecies are endemic (Duman 2000;Dönmez 2006;Özhatay & Kültür 2006;Parolly & Eren 2007;Dönmez et al 2010;Dinç et al 2011a). Sect.…”

“…Isotriodon is characterized by dwarf, suffrutescent, fragile, saxatile, and herbaceous habitus; terete stems with dentate or entire margined leaves; simple and secund recemes; gibbous-based and bilabiate calyces; and small nutlets (Ekim 1982). It is represented by seven species in Turkey (Dinç et al 2011a).…”

Comparative anatomical studies of some Teucrium sect. Teucrium species: Teucrium alyssifolium Stapf, Teucrium brevifolium Schreb. and Teucrium pestalozzae Boiss. (Lamiaceae)

“…Teucrium is a large and polymorphic genus which is represented by 49 taxa (36 species) in Turkey. There are 18 endemic taxa (Govaerts 1999, Duman 2000, Dönmez 2006, Parolly and Eren 2007, Dönmez et al 2010, Dinç et al 2011a, 2011b, Dirmenci 2012, Özcan et al 2015a, Vural et al 2015, Dinç and Doğu 2016). The classification of Teucrium is based on sections.…”

“…There are several studies on Teucrium anatomy (Lakusic et al 2006, 2010, Dinç et al 2008, 2009, 2011a, 2011b, Dehshiri and Azadbakht 2012, Dinç and Doğu 2012, Doğu et al 2013, Özcan 2013, Özcan and Eminagaoglu 2014, Ruiters et al 2016). However, the anatomy of T. pestalozzae , T. brevifolium and T. alyssifolium has not been investigated.…”