Pteridophytes (Spore Producing Plants: Ferns and More) • Earth.com

Filmy Fern

(Hymenophyllum)

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Description

Hymenophyllum is a genus of ferns in the family Hymenophyllaceae. Its name means "membranous leaf", referring to the very thin translucent tissue of the fronds, which gives rise to the common name filmy fern for this and other thin-leaved ferns. The leaves are generally only one cell thick and lack stomata, making them vulnerable to desiccation. Consequently, they are found only in very humid areas, such as in moist forests and among sheltered rocks. They are small and easy to overlook.

Taxonomic tree:

Domain:
Kingdom: Plantae
Phylum: Pteridophyta
Class: Polypodiopsida/Pteridopsida
Order:Polypodiales
Family:Hymenophyllaceae
Genus:Hymenophyllum
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