Snake Cactus
Snake cactus is a common name which may refer to the following species of cactus: *''Acanthocereus tetragonus'' *'' Bergerocactus emoryi'' (the golden cereus) *''Cylindropuntia spinosior'' *' *''Nyctocereus serpentinus'' * Species in the genus ''Selenicereus ''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 use ...

Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ...
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Cactus
A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Greek word (''káktos''), a name originally used by Theophrastus for a spiny plant whose identity is now not certain. Cacti occur in a wide range of shapes and sizes. Although some species live in quite humid environments, most cacti live in habitats subject to at least some drought. Many live in extremely dry environments, even being found in the Atacama Desert, one of the driest places on Earth. Because of this, cacti show many adaptations to conserve water. For example, almost all cacti are succulents, meaning they have thickened, fleshy parts adapted to store water. Unlike many other succulents, the stem is the only part of most cacti where this vital process takes place. Most species of cacti have lost true leaves, retaining only spines, ...
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Acanthocereus Tetragonus
''Acanthocereus tetragonus'', is a species of cactus that is native to Florida and the Lower Rio Grande Valley of Texas in the United States, Mexico, Central America, the Caribbean, and northern South America. The species is invasive in New Caledonia. Common names include night-blooming cereus, barbed-wire cactus, sword-pear, dildo cactus, triangle cactus, and Órgano-alado de pitaya (Spanish). The miniature cultivar is known as fairy castle cactus. It was originally described by Carl Linnaeus in 1753 as ''Cactus tetragonus'' but was moved to the genus ''Acanthocereus'' in 1938 by Pieter Wagenaar Hummelinck. Description ''Acanthocereus tetragonus'' is a tall, columnar cactus that reaches a height of . Stems are dark green, have three to five angles, and are in diameter. Areoles are grey and separated by . Central areoles have one to two spines up to long, while radial areoles have six to eight spines up to in length. The flowers are in diameter with a tube in length. Outer ...
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Bergerocactus Emoryi
''Bergerocactus emoryi'' is a species of cactus, known commonly as the golden-spined cereus, golden snake cactus, velvet cactus or golden club cactus. It is a relatively small cactus, but it can form dense thickets or colonies, with the dense yellow spines giving off a velvety appearance when backlit by the sun. From April to May, yellow, green-tinged flowers emerge, which transform into reddish, globular fruit. This species is native to the California Floristic Province, and is found in northwestern Baja California and a small part of California, in San Diego County and on the southern Channel Islands. Where the Mediterranean climate of the California Floristic Province collides with the subtropical Sonoran Desert near El Rosario, hybrids with two other species of cacti are found. It is the sole member of the monotypic genus ''Bergerocactus'', named after German botanist Alwin Berger. Description This species is a shrub-like cactus, forming thickets of columnar to prostrate ...
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Golden Cereus
''Bergerocactus emoryi'' is a species of cactus, known commonly as the golden-spined cereus, golden snake cactus, velvet cactus or golden club cactus. It is a relatively small cactus, but it can form dense thickets or colonies, with the dense yellow spines giving off a velvety appearance when backlit by the sun. From April to May, yellow, green-tinged flowers emerge, which transform into reddish, globular fruit. This species is native to the California Floristic Province, and is found in northwestern Baja California and a small part of California, in San Diego County and on the southern Channel Islands. Where the Mediterranean climate of the California Floristic Province collides with the subtropical Sonoran Desert near El Rosario, hybrids with two other species of cacti are found. It is the sole member of the monotypic genus ''Bergerocactus'', named after German botanist Alwin Berger. Description This species is a shrub-like cactus, forming thickets of columnar to prostrate ...
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Cylindropuntia Spinosior
''Cylindropuntia spinosior'', with the common names include cane cholla, spiny cholla and walkingstick cactus, is a cactus species of the North American deserts. It is native to Arizona and New Mexico in the United States; and Chihuahua and Sonora in Mexico. Description ''Cylindropuntia spinosior'' grows to between 0.4 and 1.2 metres in height and has spine-covered stems. Flowers may be rose, red purple, yellow, or white and appear from spring to early summer. These are followed by fruits that are yellow with occasional red or purple tinges. Invasive species In Australia, the species is regarded as an emerging weed threat in Queensland where it is known as snake cactus. It is a declared noxious weed in New South Wales where it was first observed to be naturalised in 2000/2001. It is also naturalised in South Australia South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. Wi ...
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Nyctocereus Serpentinus
''Peniocereus'' is a genus of vining cacti, comprising about 18 species, found from the southwestern United States and Mexico. They have a large underground tuber, thin and inconspicuous stems. Its name comes from the prefix ''penio-'' (from the Latin ''penis'', meaning ‘tail’) and '' Cereus'', the large genus from which it was split. Known as the desert night-blooming cereus, it also shares its common names of "night-blooming cereus Night-blooming cereus is the common name referring to a large number of 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 s ..." and "queen of the night" with many other similar cacti. Taxonomy ''Peniocereus'' was first described in 1905 by Alwin Berger as a subgenus of ''Cereus'' with a single species, ''Cereus greggii''. This taxon was elevated to the genus level as ''Peniocereus greggii'' by Britton and Rose in 1909. ...
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