Peniocereus

Cladus: Eukaryota
Regnum: Plantae
Divisio: Magnoliophyta
Classis: Magnoliopsida
Ordo: Caryophyllales
Familia: Cactaceae
Subfamilia: Cactoideae
Tribus: Pachycereeae
Genus: Peniocereus
Species: P. chiapensis - P. cuixmalensis - P. greggii - P. hirschtianus - P. maculatus - P. marnierianus - P. oaxacensis - P. rosei - P. striatus

Name

Peniocereus (A.Berger) Britton & Rose, Contributions from the United States National Herbarium 12(10): 428. 1909.
Synonyms

Cullmannia Distef., Kakteen Sukk. 7 : 8. 1956.
Neoevansia W.T.Marshall, Cact. (W.T.Marshall & Bock) 84. 1941.

Reference

Arias, S. & al. 2005. Phylogenetic relationships in Peniocereus (Cactaceae) inferred from plastid DNA sequence data. Journal of Plant Research 118(5): 317-328. (reinstate the genus Nyctocereus)
Tropicos
Anderson, E. F. 2001. The Cactus Family. Timber Press, Portland, Oregon. 776 p.

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.
Synonymy

The following genera have been brought into synonymy with Peniocereus:

Cullmannia Distefano
Neoevansia W.T.Marshall
Nyctocereus (A.Berger) Britton & Rose

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