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| Peniocereus | |
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| Peniocereus greggii flower | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Cactaceae |
| Subfamily: | Cactoideae |
| Tribe: | Echinocereeae |
| Genus: | Peniocereus (A.Berger) Britton & Rose |
| Synonyms | |
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Peniocereus is a genus of vining cacti, comprising about 18 species, found from the southwestern United States and Mexico. They have a large underground tuber, thin and inconspicuous stems. Its name comes from the prefix penio- (from the Latin penis, meaning ‘tail’) and Cereus, the large genus from which it was split.[1]
Known as the desert night-blooming cereus, it also shares its common names of "night-blooming cereus" and "queen of the night" with many other similar cacti.
- ^ A. Michael Powell; James F. Weedin (2004). Cacti of the Trans-Pecos & Adjacent Areas. Texas Tech University Press. p. 193. ISBN 978-0-89672-531-7.