[plants] Haeckel (1866) - plants vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998) euphyllophytes see Clade Euphyllophyta Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020] Spermatophyta Britton & Brown 1896 [Crane & Kenrick 1997], nom. cl. inval. - seed plants see Clade Spermatophyta Britton & Brown 1896 [Cantino, Doyle & Donoghue 2020] Class Magnoliopsida Brongn. (1843) "Eudicots" see Clade Eudicotyledoneae Donoghue, Doyle & Cantino 2007 [Donoghue, Doyle & Cantino 2020] "Core Eudicots" see Clade Gunneridae Soltis, Soltis & Judd 2007 [Soltis, Soltis & Judd 2020] Order Caryophyllales Juss. ex Bercht. & J.Presl (1820) Family Cactaceae Juss. (1789), nom. cons. - cactus family Subfamily Cactoideae K. Schumann Tribe Trichocereeae F. Buxbaum Genus Gymnocalycium Pfeiffer, in Pfeiffer & Otto (1845)