Peniocereus

 

Peniocereus is a genus of dozen species of vining cactus from the southwestern USA and Mexico. They have a large underground tuber, and the stem are thin and inconspicuous. Most species are considered rare, but this might be partially due to the fact that they are difficult to see as the stems are twisted in shrubs. Some of its species have been classified in the genus Wilcoxia.

Peniocereus have large nocturnal flowers in summer, and several species are known as 'Queen of the Night'.

Species and varieties
Peniocereus castellae
Peniocereus cuixmalensis
Peniocereus fosterianus
Peniocereus greggii (Night Blooming Cereus, Reina de la Noche)
Peniocereus greggii var. transmontanus (Night Blooming Cereus, Reina de la Noche)
Peniocereus hirschtianus
Peniocereus johnstonii
Peniocereus lazaro-cardenasii
Peniocereus macdougallii
Peniocereus maculatus
Peniocereus marianus
Peniocereus oaxacensis
Peniocereus occidentalis
Peniocereus rosei
Peniocereus serpentinus (Junco Espinoso, Reina de la Noche)
Peniocereus striatus (Cardoncillo, Dahlia-rooted Cereus)
Peniocereus tepalcatepecanus
Peniocereus viperinus (Organito de Vibora)
Peniocereus zopilotensis
Peniocereus diguetii synonym of Peniocereus striatus (Cardoncillo, Dahlia-rooted Cereus)
Peniocereus lazarocardenasii synonym of Peniocereus lazaro-cardenasii
Peniocereus tomentosus synonym of Peniocereus viperinus (Organito de Vibora)

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