Pygmaeocereus

{{Short description|Genus of cacti}}

{{Automatic taxobox

|image = Pygmaeocereus bylesianus1MW.jpg

|image_caption = Pygmaeocereus bylesianus

|display_parents = 2

|taxon = Pygmaeocereus

|authority = H.Johnson & Backeb.

|subdivision_ranks = Species

|subdivision = See text.

}}

Pygmaeocereus is a genus of small cacti (family Cactaceae).{{cite web |title=Pygmaeocereus H.Johnson & Backeb. |work=Plants of the World Online |publisher=Royal Botanic Gardens, Kew |url=http://www.plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:30044530-2 |access-date=2024-12-28}}{{Cite journal |last=Powell |first=Andy T. |date=1994 |title=Arthrocereus - Small Cerei, Big Ideas on Flowers |url=https://www.jstor.org/stable/42794715 |journal=British Cactus & Succulent Journal |volume=12 |issue=2 |pages=65–67 |issn=0264-3405}} The genus is endemic to Peru.

These species generally do not reach more than {{cvt|4|in|mm|order=flip}} high, and produce a large tuberous root system and scented night flowers.{{citation needed|date=December 2024}}