Selenicereus undatus - Pitahaya Red skin White pulp

Climbing cactus with excellent fruits. Red pitahaya is the most cultivated species in the genus. The native origin of the species has never been resolved. The name of the species is for its undulate or wavy margins of the ribs. Stems creeping, sprawling or clambering, branching profusely, of 0,5-1 m (1,7-3 ft) long or more. Three ribs generally, with margins corneous in age and undulate, and spines on adult branches. Flowers are nocturnal, scented, greenish yellow or whitish, rarely tinged rose. It flowers in summer or autumn. Fruits are oblong to ovoid, to 6-13 cm (2.5-5 "), red with large wings (bracteoles), the pulp is white, edible, with black seeds. It is an easily cultivated plant, with fast growing epiphyte or xerophyte. Is the most spread type of pitahaya and is used both as an ornamental vine and as a fruit crop. Pitahaya needs a pollinating mate of a different Hylocereus species, in order to fruit properly. Canarius offers other Pitahaya species.

The actual size of this plant is: Rooted cutting of 20-25 cm.

Picture of the fruit from wikimedia commons:
De Emőke Dénes - kindly granted by the author, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=72059197