Opuntia | opuntia | Sesbania tomentosa | Opuntia stricta | Uncaria tomentosa | Paulownia tomentosa | Opuntia ficus-indica | ''Trema tomentosa var. viridis'' from Eastwood, New South Wales | Opuntia robusta | Opuntia polyacantha | Opuntia phaeacantha | Opuntia leucotricha | Opuntia fragilis | Morchella tomentosa |
wildpretii is known to grow on species of the globose cacti Echinocactus platyacanthus, Mammillaria carnea and Ferocactus latispinus; the opuntioid cacti Opuntia depressa, O. maxima, O. pilifera and O. tomentosa) and the columnar cacti (Myrtillocactus geometrizans, Pachycereus hollianus, P. weberi, Stenocereus and Neobuxbaumia.