Cnidoscolus angustidens subsp. orbiculatus (Lundell) Breckon ex Fern. Casas Cnidoscolus angustidens subsp. orbiculatus (Lundell) Breckon ex Fern. Casas in Fontqueria 56: 255. 2012 sec. Maya-Lastra & Steinmann 2018≡Cnidoscolus orbiculatus Lundell, Bull. Torrey Bot. Club 72(3). 1945 syn. sec. Maya-Lastra & Steinmann 2018