Typification of the name Asperula rupestris (Rubiaceae)

Asperula rupestris Tineo (1827: 276) is a species endemic to Sicily, southern Italy. It is a chasmophyte growing on northexposed calcareous rocks and cliffs of the main promontories of NW Sicily and the islands of Favignana and Marettimo, Egadi Islands, NW of Siciliy (see e.g., Giardina et al. 2007).A nomenclatural study of Asperula rupestris (Rubiaceae, tribe Rubieae) revealed that this name has not yet been typified (Peruzzi et al. 2015). The present paper is part of ongoing research on the names of vascular plants described using specimens collected in Sicily (e.g., Di Gristina et al. 2012, 2016, 2017, 2020; Domina et al. 2014, 2016, 2017a, 2017b; Scafidi & Domina 2019; Scafidi et al. 2020; Traclet et al. 2017). This investigation contributes to the project of the Floristic Group of the Italian Botanical Society to typify all taxa described from Italy, in order to increase their systematic knowledge and promote further studies (Domina et al. 2012; Peruzzi et al. 2015, 2019; Brundu et al. 2017).