Car. Lud. Willdenow: Enumeratio Plantarum Horti regii berolinensis: continens descriptiones omnium vegetabilium in horto dicto cultorum: Supplementum. 1814, S. 33 (online).
doi.org
Matias Köhler, Fabian Font, Raul Puente-Martinez, Lucas C. Majure: “That’s Opuntia, that was!”, again: a new combination for an old and enigmatic Opuntia s.l. (Cactaceae). In: Phytotaxa. Band 505, Nr. 3, S. 262–274 (doi:10.11646/phytotaxa.505.3.2).