Synonyms: Diadesma rhombifolia (homotypic); Malva rhombifolia (homotypic); Napaea rhombifolia (homotypic); Sida alba (heterotypic); Sida andicola; Sida arbuscula (homotypic); Sida canariensis; Sida canescens; Sida capensis (heterotypic); Sida carpinifolia (heterotypic); Sida compressa; Sida forsteri; Sida frutescens (heterotypic); Sida fryxellii; Sida gorgonea (homotypic); Sida grata; Sida hondensis; Sida incerta; Sida longipes (heterotypic); Sida maderensis (homotypic); Sida nudata; Sida ostryifolia; Sida philippica; Sida praelonga; Sida pringlei; Sida recisa; Sida retusifolia; Sida rhombifolia canariensis; Sida rhombifolia guazumifolia; Sida rhombifolia longipedicellata; Sida rhombifolia maderensis (homotypic); Sida rhombifolia var. canariensis; Sida rhombifolia var. guazumifolia; Sida rhombifolia var. maderensis; Sida rhombifolia var. minor; Sida rhombifolia var. retusa (heterotypic); Sida riparia (homotypic); Sida ruderata; Sida scoparia (heterotypic); Sida semicrenata; Sida sinensis; Sida stipulata (heterotypic); Sida subrhombiformis; Sida trinervia (homotypic); Sida troyana; Sida truncatula