Stafleu, F.A., Cowan, R.S., Mennega, E.A., et al., Taxonomic Literature, 2nd ed., vol.
6
: 355-356 (1973-2008) Scanned by the Smithsonian Institute, Washington, U.S.A.
355
356
volume TL2:
page:
sets
cacti / succulents
cacti
succulents
fruits
ornamental foliage plants