Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations Author Mucina, Ladislav Iluka Chair in Vegetation Science and Biogeography, School of Biological Sciences, The University of Western Australia, 35 Stirling Hwy, Crawley WA 6009, Perth, Australia & Department of Geography & Environmental Studies, Stellenbosch University, Private Bag X 1, Matieland 7602, Stellenbosch, South Africa Laco.Mucina@uwa.edu.au text Phytotaxa 2017 2017-07-07 312 2 151 178 journal article 10.11646/phytotaxa.312.2.1 1179-3163 7868103 18. Caroxylon calluna (Drège ex C.H.Wright) Theodorova in Mucina, comb. nov. Basionym:― Salsola calluna Drège ex C.H.Wright in Thiselton-Dyer, Fl. Capensis 5, 1: 454 (1912) . Lectotype (designated by Wright 1912: 454 ):― SOUTH AFRICA . Uitflugt , auf verschiedenen Stellen bei Steelkloof , 4000–5000 ft , December/January , Drège 8023b ( lectotype W-0046461 !;!; isolectotypes LE-00011835 !, W-0046460! ). ‒ “ Caroxylon callunum ” in Theodorova in Turczaninowia 14(3): 75 (2011) , [ comb. inval .] ‒ Salsola calluna Fenzl , in schedis , ( Ecklon & Zeyher 1448 WU!). ‒ Salsola calluna Fenzl ex Drège in Flora 2, Beigabe: 50, 56, 217 (1843), nom. nud. (Art. 38.1a of ICN). Notes: ― Feodorova (2011) used a wrong form of the species epithet (‘ callunum ’). The epithet apparently alludes to Calluna vulgaris ( Ericaceae ) of which the flowering/fruiting branches of this Caroxylon species are remotely reminiscent. ‘ Calluna ’ is the nown and the specific epithet should be preserved. Moreover, when proposing her new combination, Feodorova (2011) also provided a wrong citation of the basionym, thus making her combination invalid. The combination is validated here and Feodorova’s authorship is preserved. Distribution: ―South Africa (FS, NC, WC?, EC): southern Bushmanland, Upper Karoo, Middelburg region, salt pan region of western Free State and Griqualand West.