Selenicereus, sometimes known as moonlight cactus, is a genus of epiphytic, lithophytic, and terrestrial cacti, found in Mexico, Central America, the Caribbean and northern South America. The term night-blooming cereus is also sometimes used, but this is also used for many night-blooming cacti, including Epiphyllum and Peniocereus. In 2017, the genus Hylocereus was brought into synonymy with Selenicereus. A number of species of Selenicereus produce fruit that is eaten. The fruit, known as pitaya or pitahaya in Spanish or as dragon fruit, may be collected from the wild or the plants may be cultivated.
Clambering plants with flat to angled stems, producing aerial roots. Areoles may be with or without spines. Flowers are large and nocturnal, pollinated by moths or rarely bats. The receptacle bears small bracts, hairs and usually spines. Fruits bear numerous spines. Flowers are generally produced in abundance with mature plants and are typically white and are very fragrant and only last a single night in most species.[citation needed]
Taxonomy
The taxon was first described as a section, Cereus sect. Selinicereus, by Alwin Berger in 1905. It was raised to a genus by Britton and Rose in 1909. The name is derived from Σελήνη (Selene), the Greek moon goddess, referring to the nocturnal flowers, and cereus, meaning "candle" in Latin, a name used for upright cacti.[3] A molecular phylogenetic study of the tribe Hylocereeae in 2017 showed that the genus Hylocereus was nested within Selenicereus, so all the species of Hylocereus were transferred to Selenicereus.[4]As of March2021[update], the transfer was accepted by Plants of the World Online.[2] The authors of the 2017 study also placed some species of Weberocereus within Selenicereus,[4] which was not accepted by Plants of the World Online as of March2021[update].[2]
Phylogeny
The cladogram below shows the relationships found in the 2017 study of the tribe Hylocereeae.[4]
Selenicereus belongs to the hylocereoid clade, along with Weberocereus. Members of the clade are mostly climbing or epiphytic, and have spiny ribbed stems, contrasting with members of the phyllocactoid clade, which are mainly epiphytic, and have spineless flattened leaf-like stems.[4]
Species
Species placed in the genus by Korotkova et al. in 2017 are listed below.[4] The list includes three species formerly placed in Weberocereus, whose transfer was not accepted by Plants of the World Online as of March2021[update].[2]
Stems like those of Epiphyllum anguliger but more vining and with short spines. Flowers ca. 12cm long, 10–15cm wide, the outer inner tepals purplish, the inner cream.[citation needed]
Stems gray-green without horny margins. Flowers ca 30 cm long, petals white, tinged pinkish near base or entirely pink. Tube with distant bracts. Stigma lobes usually forked. Fruit red with purple pulp.
Colombia, Costa Rica, Ecuador, Nicaragua, Panamá, Peru, Trinidad and Tobago, Venezuela and the Venezuelan Antilles[19]
Stems only 8mm thick, nearly spineless. Flowers 15cm long, spiny, hairless. Closely related to S. spinulous and S. inermis (sensu lat.).[citation needed]
Selenicereus ocamponis (Salm-Dyck) D.R.Hunt(syn. incl. H. guatemalense, H. purpursii, H. ocamponis)
Stems white-waxy, margins horny, spines needle-like, to 12 mm long. Flowers 25–32 cm long with white inner petals. Bracts overlapping, with purple margins.
Stems green without horny margins. 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 fruits of a number of species of Selenicereus (particularly those formerly placed in Hylocereus) are eaten. Selenicereus undatus and Selenicereus triangularis are widely cultivated in the Americas, Europe and Asia for their fruits, known as pitayas or pitahayas in Spanish, and as dragon fruits in Asia. The fruit of Selenicereus setaceus is eaten in South America.[34]
Related Research Articles
Night-blooming cereus is the common name referring to many flowering ceroid cacti that bloom at night. The flowers are short lived, and some of these species, such as Selenicereus grandiflorus, bloom only once a year, for a single night, though most put out multiple flowers over several weeks, each of which opens for only a single night. Other names for one or more cacti with this habit are princess of the night, Honolulu queen, Christ in the manger, dama de noche, and queen of the night.
Acanthocereus is a genus of cacti. Its species take the form of shrubs with arching or climbing stems up to several meters in height. The generic name is derived from the Greek word άκανθα (acantha), meaning spine, and the Latin word cereus, meaning candle. The genus is native to the mostly tropical Americas from Texas and the southern tip of Florida to the northern part of South America, including islands of the Caribbean.
Pachycereus is a genus of large cacti native to Central America and Mexico. They form large shrubs or small trees up to 15 m tall, with stout stems up to 1 m in diameter. Pachycereus comes from the ancient Greek παχύς (pachys) meaning "thick" and the Latin cereus meaning "torch".
Epiphyllum is a genus of epiphytic plants in the cactus family (Cactaceae), native to Central America and South America. Common names for these species include climbing cacti, orchid cacti and leaf cacti, though the latter also refers to the genus Pereskia.
Hylocereus is a former genus of epiphytic cacti, often referred to as night-blooming cactus. Several species previously placed in the genus have large edible fruits, which are known as pitayas, pitahayas or dragonfruits. In 2017, a molecular phylogenetic study confirmed an earlier finding that the genus Hylocereus was nested within Selenicereus, so all the species of Hylocereus were transferred to Selenicereus.
Weberocereus is genus of cacti. It produces a green and white flower and is found mainly in Costa Rica and Nicaragua.
Deamia is a genus of cacti. Its species are native from south Mexico through Central America to Nicaragua. Its species have been placed in Selenicereus and Strophocactus.
Strophocactus is a genus of cacti in the subfamily Cactoideae. Its status and circumscription remain somewhat uncertain, with the genus containing one to three species. Molecular phylogenetic data suggest that it consists of three species, including two formerly comprising the genus Pseudoacanthocereus. With this circumscription, the species have different growth habits, but share similarities in their flowers, which are white and open at night.
Mila caespitosa is a species of cacti and the only species of the genus Mila. Its generic name is an anagram of Lima, Peru, the city near which the plant is found. The genus was first thought to comprise 13 species, until recent studies suggest they form one very variable species.
Selenicereus undatus, the white-fleshed pitahaya, is a species of the genus Selenicereus in the family 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.
Selenicereus costaricensis, synonym Hylocereus costaricensis, known as the Costa Rican pitahaya or Costa Rica nightblooming cactus, is a cactus species native to Central America and north-eastern South America. The species is grown commercially for its fruit, called pitaya or pitahaya, but is also an impressive ornamental vine with huge flowers. The species may not be distinct from Selenicereus monacanthus.
Selenicereus megalanthus, synonym Hylocereus megalanthus, is a cactus species in the genus Selenicereus that is native to northern South America, where it is known, along with its fruit, by the name of pitahaya. The species is grown commercially for its yellow fruit, but is also an impressive ornamental climbing vine with perhaps the largest flowers of all cacti.
Aporocactus martianus is a species of cactus found in Oaxaca, Mexico.
Strophocactus brasiliensis is a species of cactus also known by its synonym Pseudoacanthocereus brasiliensis. It is endemic to Brazil. Its natural habitats are tropical and subtropical dry broadleaf forests and savanna. It is threatened by habitat loss.
Selenicereus grandiflorus is a cactus species originating from the Antilles, Mexico and Central America. The species is commonly referred to as queen of the night, night-blooming cereus, large-flowered cactus, sweet-scented cactus or vanilla cactus. The true species is extremely rare in cultivation. Most of the plants under this name belong to other species or hybrids. It is often confused with the genus Epiphyllum.
The Hylocereeae are a tribe of cacti. Most are found in the tropical forests of Central and northern South America, and are climbers or epiphytes, unlike most cacti. The tribe includes between six and eight genera in different circumscriptions. The plants known as "epiphyllum hybrids" or "epiphyllums", widely grown for their flowers, are hybrids of species within this tribe, particularly Disocactus, Pseudorhipsalis and Selenicereus, less often Epiphyllum, in spite of the common name.
Selenicereus monacanthus, synonym Hylocereus monacanthus, is a species of plant in the family Cactaceae. It is native to parts of Central America and South America.
Strophocactus wittii, synonym Selenicereus wittii, known as the Amazon moonflower, is a species of plant in the genus Strophocactus in the cactus family (Cactaceae), and is one of several species commonly called "moonflowers". It was first described in 1900 and is one of three species of cactus found in the central Amazon basin.
Kimnachia is a monotypic genus of cacti. Its only species is Kimnachia ramulosa, synonym Pseudorhipsalis ramulosa, which is native from southern Mexico to northern South America and also found in Jamaica.
Deamia testudo is a species of flowering plant in the family Cactaceae, native from southern Mexico through Central America to Nicaragua. It was first described in 1838. It is a climber or clamberer, with long stems and large white flowers.
References
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