TY - JOUR AU - Minué, Carlos R. AU - Jocou, Adriel Ian PY - 2021/01/07 Y2 - 2024/03/29 TI - The genus Sesuvium (Aizoaceae, Sesuvioideae) in the Southern Cone JF - Hacquetia JA - Hacquetia VL - 20 IS - 1 SE - Articles DO - UR - https://ojs.zrc-sazu.si/hacquetia/article/view/8973 SP - 33–48 AB - <p><em>Sesuvium</em> is a genus of 14 to 17 species of succulent plants, both annual and perennial, widely distributed in tropical and subtropical regions. The genus <em>Sesuvium</em> has not yet been studied in detail in the Southern Cone (Argentina, Southern Brazil, Chile, Paraguay and Uruguay), which has led to a misidentification of numerous specimens as <em>S. portulacastrum</em>. As part of the ongoing floristic, taxonomic and ecologic studies in Argentina, we revise the genus <em>Sesuvium</em> for the Southern Cone. This study is based on field investigation, examination of herbarium specimens, and revision of literature. The taxonomic treatments, maps of distribution, a detailed description, photographs, an illustration, a dichotomous key and a comparative table to differentiate the species of the genus <em>Sesuvium</em> occurring in the Southern Cone are presented. Finally, ecological, morphological, and taxonomic aspects of the species are discussed. The new combination of <em>Sesuvium americanum</em> (<em>≡Trianthema americanum</em>&nbsp;Gillies ex Arn.; =<em>S. verrucosum</em> Raf.) is proposed. Lectotypes for three names are here designated (<em>S. revolutifolium</em> Vahl ex Willd.; <em>S. revolutifolium</em> Lam., and <em>S. parviflorum</em> DC.). Four species should be accepted for the Southern Cone:<em> Sesuvium americanum</em>, <em>S. humifusum</em>, <em>S. mezianum</em> and <em>S. sessile</em>. Furthermore,<em> Sesuvium portulacastrum</em> is excluded from the flora of the Southern Cone.</p> ER -