filmy fern
Noun: 1. A type of fern belonging to the genus Hymenophyllum, characterized by growing in tropical, humid climates and having very thin, often translucent leaves. 2. A type of fern belonging to the genus Trichomanes, characterized by large, often translucent, pinnatifid fronds (leaves divided into lobes). Most species grow as epiphytes (on tree branches) or on mossy banks.
The term "filmy fern" is used to describe specific, delicate ferns known for their thin, nearly transparent leaf tissue. It is a common name applied to ferns in two related genera. * Botanists study the unique structure of the filmy fern. * The greenhouse has a special humid section for filmy ferns and other moisture-loving plants. * A single layer of cells makes the frond of a filmy fern translucent.
- As a collective term: The phrase can refer to the group of ferns sharing this characteristic thinness, often from the family Hymenophyllaceae.
- The forest floor was carpeted with various mosses and filmy ferns.
- Hymenophyllum (n): The botanical genus name for one group of filmy ferns.
- Trichomanes (n): The botanical genus name for another group of filmy ferns.
- Bristle fern (n): A common name for some ferns in the genus.
- Epiphyte (n): A plant that grows on another plant for physical support, a common growth habit for many filmy ferns.
- Translucent fern: A descriptive synonym emphasizing the leaf property.
- Film fern: A less common variant of the name.
The two primary definitions refer to different but closely related botanical genera (Hymenophyllum and Trichomanes). In general usage, "filmy fern" encompasses both, focusing on the shared physical characteristic—extremely thin, membranous fronds—rather than the precise taxonomic classification.
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any fern of the genus Hymenophyllum growing in tropical humid regions and having translucent leaves
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any fern of the genus Trichomanes having large pinnatifid often translucent fronds; most are epiphytic on tree branches and twigs or terrestrial on mossy banks
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