Mesembryanthemum tetragonum Mesembryanthemum tetragonum Moench, Suppl. Meth.: 191. 1802 sec. Kew 20191 wfo-00003707241. Kew 2019: Dataset export of the World Checklist of Vascular Plants database, dated 19 December. – Kew: Royal Botanic GardensContent