Pfeiffera monacantha (syn. Rhipsalis monacantha), the onespined wickerware cactus, is a species of epiphytic cactus, native to Bolivia and northwest Argentina. As its synonym Rhipsalis monacantha it has gained the Royal Horticultural Society's Award of Garden Merit.
Subtaxa The following subspecies are accepted: Pfeiffera monacantha subsp. kimnachii (Doweld) Ralf Bauer Pfeiffera monacantha subsp. monacantha
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