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Dragonfruit stems are scandent (climbing habit), creeping, sprawling or clambering, and branch profusely. There can be four to seven of them, between 5 and 10 m (16 and 33 ft)or longer, with joints from 30 to 120 cm (12 to 47 in) or longer, and 10 to 12 cm (3.9 to 4.7 in) thick; with generally three ribs; margins are corneous (horn-like) with age, and undulate.
Pitaya usually refers to fruit of the genus Stenocereus, while pitahaya or dragon fruit refers to fruit of the genus Selenicereus (formerly Hylocereus), both in the family Cactaceae. [3] The common name in English – dragon fruit – derives from the leather-like skin and scaly spikes on the fruit exterior.
Flowers ca. 22 cm long, 21 cm wide, base with small, narrow, widely spaced scales, sometimes spiny. Fruit red. May be a synonym of Selenicereus triangularis: the Caribbean. [29] Selenicereus undatus (Haw.) D.R.Hunt: Stems green, margins undulate and horny. Flowers 25–30 cm long, white with green outer tepals and bracts. Fruit red with white pulp.
An April 2021 study in the journal Molecules shows that there is a higher concentration of phenolic compounds in red dragon fruit as compared to other colors. Red-skinned dragon fruit is high in ...
In fruit, the cell walls are mainly composed of polysaccharides including pectin. During ripening, a lot of the pectin is converted from a water-insoluble form to a soluble one by certain degrading enzymes. [11] These enzymes include polygalacturonase. [9] This means that the fruit will become less firm as the structure of the fruit is degraded.
The fruit is similar to a dragon fruit. Those of Stenocereus gummosus, acidic and very refreshing, are highly favored by the Seris of northwestern Mexico [1] who call the cactus ziix is ccapxl [2] - "thing whose fruit is sour". It is commonly known in Spanish as pitaya agria, or by the English translation Sour Pitaya.
The plant Weber described had a triangular stem-like Cereus trigonus, but was "distinguished by its more glaucous stem and especially by its fruit, just as big but more spherical, less scaly, and filled with a crimson pulp of a very delicate taste." [4] It was said to be highly sought after in Costa Rica for its fruit, known as pitahaya. [5]
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