Pfeiffera monacantha

{{Short description|Species of plant in the genus Pfeiffera}}

{{Speciesbox

|image=Pfeiffera monacantha150183180.jpg

|image_caption=Growing epiphytically in Calilegua National Park, Argentina

|image2=Pfeiffera monacantha.jpg

|image2_caption=Close-up of flower

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author= Lowry, M. |author2= Carr, J. |date=2017 |title= Pfeiffera monacantha |volume=2017 |page= e.T152058A121577248 |doi= 10.2305/IUCN.UK.2017-3.RLTS.T152058A121577248.en |access-date=May 8, 2024}}

|genus=Pfeiffera

|species=monacantha

|authority=(Griseb.) P.V.Heath

|synonyms_ref=

|synonyms={{Collapsible list|

• Acanthorhipsalis incahuasina Cárdenas
• Acanthorhipsalis monacantha (Griseb.) Britton & Rose
• Acanthorhipsalis monacantha subsp. kimnachii Doweld
• Acanthorhipsalis monacantha var. samaipatana (Cárdenas) Backeb.
• Hariota monacantha (Griseb.) Kuntze
• Lepismium monacanthum (Griseb.) Barthlott
• Lepismium monacanthum subsp. espinosum (Kimnach) Süpplie
• Pfeiffera incahuasina (Cárdenas) P.V.Heath
• Pfeiffera incahuasina var. samaipatana (Cárdenas) P.V.Heath
• Rhipsalis monacantha Griseb.
• Rhipsalis monacantha var. espinosa Kimnach
• Rhipsalis monacantha var. samaipatana Cárdenas

}}}}

Pfeiffera monacantha (syn. Rhipsalis monacantha), the one{{nbh}}spined wickerware cactus, is a species of epiphytic cactus, native to Bolivia and northwest Argentina.{{cite web |url=http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:977728-1 |title=Pfeiffera monacantha (Griseb.) P.V.Heath |author= |website=Plants of the World Online |publisher=Board of Trustees of the Royal Botanic Gardens, Kew |access-date=11 June 2021 }} As its synonym Rhipsalis monacantha it has gained the Royal Horticultural Society's Award of Garden Merit.{{cite web |title=Rhipsalis monacantha one-spined wickerware cactus |url=https://www.rhs.org.uk/Plants/106229/i-Rhipsalis-monacantha-i/Details |date=2021 |publisher=The Royal Horticultural Society |access-date=11 June 2021 }}