Definition

Proper noun A taxonomic genus of flowering plants in the cactus family (Cactaceae). The plants in this genus are primarily epiphytic or lithophytic, meaning they grow on other plants or rocks, and are known for their climbing or sprawling growth habit. They are most famous for their large, fragrant flowers that typically open only at night.

Usage Notes

• "Genus Selenicereus" is a scientific name. In formal biological contexts, it is always italicized. The genus name is capitalized, while the species name that follows it is not (e.g., ).
• In common language, plants from this genus are often referred to as "night-blooming cereus," "queen of the night," or "moonlight cactus."
• It functions as a singular noun (e.g., The genus Selenicereus is fascinating).

Examples

• Scientific Context: was recently reclassified based on DNA analysis.
• Descriptive Context: The most spectacular feature of is its nocturnal blooming cycle.
• Horticultural Context: Many collectors seek species from for their dramatic night-time flowers.

Advanced Usage

• Phylogenetics: In phylogenetic studies, is placed within the tribe Hylocereeae, closely related to genera like (pitaya or dragon fruit).
• Taxonomic Discussion: The circumscription of has changed, with some species formerly placed in or now included here.

Variants and Related Words

• Selenicereus (n.): The standard, abbreviated form of the genus name used in most scientific and horticultural writing.
• Night-blooming cereus (n.): A common name for several cactus species, many of which belong to . This is not a precise synonym but a descriptive term.
• Epiphyte (n.): A plant that grows on another plant for physical support. This describes the growth habit of most species.
• Lithophyte (n.): A plant that grows on rocks. Some species exhibit this habit.

Synonyms

• Moonlight Cacti (n., informal): A descriptive synonym referencing the nocturnal flowering.
• Queen of the Night (n., informal): A common name for specific species within the genus, notably .

Related Terms (Not Direct Synonyms)

• Cactaceae (n.): The cactus family, to which this genus belongs.
• Hylocereeae (n.): The tribe within the cactus family containing climbing, often epiphytic, cacti.
• Nocturnal (adj.): Occurring at night. Describes the blooming characteristic definitive of this genus.
• Epiphytic (adj.): Describing the growth habit of these plants.

Noun

1. mostly epiphytic climbing cacti that bloom at night