Definition

Noun: 1. A type of cactus: Any cactus belonging to the genus Epiphyllum, characterized by flat, jointed, and irregularly branching stems that resemble leaves, and known for its large, often nocturnal, showy tubular flowers. These plants are typically epiphytic, meaning they grow on other plants (like trees) for support in their natural habitat.

Examples of Usage

• The epiphyllum in the greenhouse bloomed spectacularly last night.
• She collects various species of epiphyllum, also known as orchid cacti.
• The flat, leaf-like stems of the epiphyllum help it absorb water and sunlight in the forest canopy.

Advanced Usage

• As a common name: Often used interchangeably with "orchid cactus" or "leaf cactus" due to its floral beauty and stem morphology. However, "epiphyllum" specifically refers to plants within the genus.
  • True epiphyllums are often confused with other similar-looking cacti like Schlumbergera (Christmas cactus).

Variants and Related Words

• Orchid Cactus (n): A common name for plants in the genus and some related genera, referring to their beautiful, orchid-like flowers.
• Epiphyte (n): A plant that grows non-parasitically on another plant, deriving moisture and nutrients from the air and rain. Epiphyllums are a type of epiphytic cactus.
• Epiphytic (adj): Describing the growth habit of an epiphyte.
  • The epiphyllum has an epiphytic lifestyle.

Synonyms

• Orchid Cactus: The most common synonym highlighting its flower.
• Leaf Cactus: A descriptive synonym referring to its flattened stems.

Notes on Meaning

• The term is highly specific to botany and horticulture. In general conversation, the common name "orchid cactus" is more frequently used.
• The defining features are its flattened, leaf-like stems (which are actually modified branches) and its large, showy, often night-blooming flowers.

Noun

1. any cactus of the genus Epiphyllum having flattened jointed irregularly branching stems and showy tubular flowers