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Selenicereus undatus, the white-fleshed pitahaya, is a species of Cactaceae and is the most cultivated species in the genus. It is used both as an ornamental vine and as a fruit crop - the pitahaya or dragon fruit.[2] The native origin of the species has never been resolved.[citation needed]

Selenicereus undatus
Fruit
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Genus: Selenicereus
Species:
S. undatus
Binomial name
Selenicereus undatus
(Haworth) D.R.Hunt[1]
Synonyms
  • Cactus triangularis aphyllus Jacquin
  • Cereus triangularis major de Candolle
  • Cereus undatus Haworth
  • Cereus tricostatus Gosselin
  • Hylocereus tricostatus (Gosselin) Britton & Rose
  • Hylocereus undatus (Haworth) Britton & Rose

Description


The red pitahaya at the Chiayi market, Taiwan
The red pitahaya at the Chiayi market, Taiwan
The flowers in Rome
The flowers in Rome

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.[2]

Areoles, that is, the small area bearing spines or hairs on a cactus, are 2 mm (0.079 in) across with internodes 1 to 4 cm (0.39 to 1.57 in). Spines on the adult branches are 1 to 4 mm (0.039 to 0.157 in) long, being acicular (needle-like) to almost conical, and grayish brown to black in colour and spreading, with a deep green epidermis.[2]

The scented, nocturnal flowers are 25 to 30 cm (9.8 to 11.8 in) long, 15 to 17 cm (5.9 to 6.7 in) wide with the pericarpel 2.5 to 5 cm (0.98 to 1.97 in) long, about 2.5 cm (0.98 in) thick, bracteoles ovate, acute, to 2.5 to less than 4 cm (1.6 in) long; receptacle about 3 cm (1.2 in) thick, bracteoles are linear-lanceolate, 3 to 8 cm (1.2 to 3.1 in) long; outer tepals lanceolate-linear to linear, acuminate (tapering to a point), being 10 to 15 cm (3.9 to 5.9 in) long, 10 to 15 mm (0.39 to 0.59 in) wide and mucronate (ending in a short sharp point). Their colour is greenish-yellow or whitish, rarely rose-tinged; inner tepals are lanceolate (tapering to a point at the tip) to oblanceolate (i.e. more pointed at the base), up to 10 to 15 cm (3.9 to 5.9 in) long about 40 mm (1.6 in) wide at widest point, and mucronate, unbroken, sharp to acuminate (pointed), and white. Stamens 5 to 10 cm (2.0 to 3.9 in) long, are declinate, inserted in one continuous zone from throat to 35 mm (1.4 in) above the pericarpel and cream. The style (bearing the stigma) to 17, they are 5 to 24.5 cm (2.0 to 9.6 in) long, stout, 6 to 8 mm (0.24 to 0.31 in) thick, cream, and up to 26 stigma lobes, they can be whole or sometimes split at the top, cream, about 25 mm (0.98 in) long. Nectar chambers are 30 mm (1.2 in) long.[2]

The fruit is oblong to oval, 6 to 12 cm (2.4 to 4.7 in) long, 4 to 9 cm (1.6 to 3.5 in) thick, red with large bracteoles, with white pulp and edible black seeds.[2]


Origin and habitat


Selenicereus undatus is lithophytic or hemiepiphytic. It is widely distributed through the tropics in cultivation. Like all true cacti, the genus originates in the Americas, but the precise origin of the species S. undatus is uncertain and it may be a hybrid. It is a sprawling or vining, terrestrial or epiphytic cactus. They climb by use of aerial roots and can reach a height of 10 meters (32.8 feet) or more growing on rocks and trees.


Systematics


This species is closely related to S. ocamponis and S. escuintlensis. Selenicereus undatus was described by (Haw.) Britton & Rose and published in Flora of Bermuda 256. 1918. In 2017, D. R. Hunt groups the genus Hylocereus within the genus Selenicereus. This has been supported by a phylogenetic analysis of the Hylocereeae tribe (Korotkova, et al., 2017), therefore this species is consigned under the name Selenicereus undatus[3]


Etymology


The species's binomial name is from Greek σελήνη (selene) 'moon', Latin cereus 'waxen', and Latin undatus 'wavy' (referring to the wavy edges of the ribs).

In bloom in Kona, Hawaii
In bloom in Kona, Hawaii
Overlooking Lanikai and Na Mokulua
Overlooking Lanikai and Na Mokulua

Synonyms



Common names


See also



References


  1. "Selenicereus undatus (Haw.) D.R.Hunt". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 11 October 2020.
  2. นิดดา หงส์วิวัฒน์ และทวีทอง หงส์วิวัฒน์. แก้วมังกร ใน ผลไม้ 111 ชนิด: คุณค่าอาหารและการกิน. กทม. แสงแดด. 2550 หน้า 37 - 39
  3. "Selenicereus Britton & Rose". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2021-03-03.
  4. "Hylocereus undatus". Llifle - Encyclopedia of Living Forms. Retrieved 20 February 2021.



На других языках


- [en] Selenicereus undatus

[es] Hylocereus undatus

Hylocereus undatus, llamada popularmente pitahaya, es la especie más cultivada del género Hylocereus. Es nativa de América Central y se distribuye ampliamente en las regiones tropicales de todo el mundo, donde se cultiva como planta ornamental y para cosechar sus frutos.

[ru] Гилоцереус волнистый

Гилоцереус волнистый, или Гилоцереус извилистый (лат. Hylocereus undatus), — крупный лазящий или стелющийся кактус, вид рода Гилоцереус (Hylocereus), один из наиболее известных видов рода[3]. Сельскохозяйственная культура, выращиваемая во многих странах мира: плоды этого вида съедобны, известны под общим для нескольких видов гилоцереуса названием питайя, или питахайя; плоды гилоцереуса волнистого иногда называют красной питайей.



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