Plant Index: Plants in genus Ritterocactus

aka Parodia borealis, Parodia buxbaumiana, Parodia comosa, Parodia cotacajensis, Parodia echinus, Parodia elata, Parodia macednosa, Parodia pseudoayopayana, Ritterocactus ayopayanus

aka Cactus langsdorfii, Echinocactus polyacanthus, Malacocarpus langsdorfii, Notocactus langsdorfii, Notocactus langsdorfii, Notocactus langsdorfii var. leprosorum, Notocactus langsdorfii var. pulvinatus, Notocactus leprosorum, Notocactus longispinus, Notocactus polyacanthus, Notocactus prolifera, Notocactus pulvinatus, Parodia langsdorfii ssp. pulvinata, Ritterocactus langsdorfii, Ritterocactus langsdorfii ssp. pulvinatus, Wigginsia langsdorfii, Wigginsia langsdorfii ssp. pulvinatus, Wigginsia leprosorum, Wigginsia leprosorum, Wigginsia longispina, Wigginsia polyacantha, Wigginsia prolifera

aka Echinocactus mammulosus, Malacocarpus mammulosus, Notocactus mammulosa, Notocactus mammulosus, Parodia mammulosa subsp. mammulosa, Ritterocactus mammulosus, Tom Thumb Cactus