Martínez-González C. R., Alcántara-Ayala O., Luna-Vega I., García-Sandoval R., Phylogenetic placement and new data on macro and micro morphology of Nopalxochia phyllanthoides (Cactaceae), an endangered species from Mexico, Phytotaxa, 2015, 222(4):241-250, doi: 10.11646/phytotaxa.222.4.1
A detailed account of stems, flowers, fruits and micromorphology of Disocactus phyllanthoides under the historical name Nopalxochia.