Disocactus speciosus

Disocactus speciosus, the sun cactus, is a species of flowering plant in the family Cactaceae. It is native to Mexico, Honduras and Guatemala, and has been introduced to the Canary Islands. As its synonym Heliocereus speciosus it has gained the Royal Horticultural Society's Award of Garden Merit.

Subtaxa
The following subspecies are accepted:
 * Disocactus speciosus subsp. blomianus (Kimnach) Ralf Bauer – Chiapas
 * Disocactus speciosus subsp. cinnabarinus (Eichlam ex Weing.) Ralf Bauer – southern Mexico, Honduras
 * Disocactus speciosus subsp. heterodoxus (Standl. & Steyerm.) M.Á.Cruz & S.Arias – Guatemala
 * Disocactus speciosus subsp. speciosus