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filmy fern
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Features and Behaviors
FEATURES
The filmy fern is also known as the bristle fern. It is an extremely delicate plant with leaves only one cell thick. The leaves grow very close together and often form a mat. Each leaf is about six inches long and one and one‐half inches wide. The light-green leaves are evergreen and lance‐shaped. Each leaf is divided into about six pairs of lacy leaflets, and the leaflet is divided further into two or more subleaflets. The short, green stipe is winged. The green rachis is also winged.
BEHAVIORS
The filmy fern may be found in Johnson and Pope counties in Illinois. It grows under moist, overhanging sandstone cliffs. Spores are produced from June through September.
Illinois Range
Taxonomy
Kingdom: Plantae
Division: Pteridophyta
Class: Filicopsida
Order: Polypodiales
Family: Hymenophyllaceae
Illinois Status
common, native
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