Disocactus nelsonii (Britton & Rose) Linding. Disocactus nelsonii (Britton & Rose) Linding. in Beih. Bot. Centralbl. 61: 383. 1942 sec. Bauer 2003≡Epiphyllum nelsonii Britton & Rose in Contr. U.S. Natl. Herb. 16: 257. 1913 syn. sec. Guzmán & al. 2003