Hymenophyllum

Hymenophyllum
A plate featuring Hymenophyllum species from The Ferns of Great Britain and Ireland
Scientific classification
Kingdom:	Plantae
Phylum:	Pteridophyta
Class:	Polypodiopsida /  Pteridopsida (disputed)
Order:	Hymenophyllales
Family:	Hymenophyllaceae
Genus:	Hymenophyllum

Hymenophyllum is a genus of ferns in the family Hymenophyllaceae. Its name means "membraneous 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.

Species

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• Hymenophyllum alveolatum, C.Chr.
• Hymenophyllum asplenoides, Caribbean Filmy Fern, (Sw.) Sw.
• Hymenophyllum axillare, Axillary Filmy Fern, Sw.
• Hymenophyllum australe, Willd
• Hymenophyllum barbatum
• Hymenophyllum brachypus, Sodiro
• Hymenophyllum brevifrons, Antilles Filmy Fern, Kunze
• Hymenophyllum contractile, Sodiro
• Hymenophyllum cristatum, Hook. & Grev.
• Hymenophyllum cupressiforme Common Filmy Fern, Labill.
• Hymenophyllum decurrens, Sierra de Luquillo Filmy Fern, (Jacq.) Sw.
• Hymenophyllum demissum
• Hymenophyllum falklandicum
• Hymenophyllum flabellatum, Labill.
• Hymenophyllum fragile, Fragile Filmy Fern, (Hedw.) Morton
• Hymenophyllum fucoides, Graceful Filmy Fern, (Sw.) Sw.
• Hymenophyllum helicoideum, Sodiro
• Hymenophyllum hirsutum, Hairy Filmy Fern, (L.) Sw.
• Hymenophyllum howense
• Hymenophyllum lanatum, Woody Filmy Fern, Fée
• Hymenophyllum lanceolatum, Palaihinahina, Hook. & Arn.
• Hymenophyllum lineare, Longtom Filmy Fern, (Sw.) Sw.
• Hymenophyllum macrothecum, Mountain Filmy Fern, Fée
• Hymenophyllum megistocarpum, (Copel.) C.V.Morton
• Hymenophyllum microcarpum, Creeping Filmy Fern, Desv.
• Hymenophyllum moorei, Baker
• Hymenophyllum nanum, Sodiro
• Hymenophyllum obtusum, Palailaulii, Hook. & Arn.
• Hymenophyllum paucicarpum, Jamaican Filmy Fern, Jenman
• Hymenophyllum polyanthos, Smooth Filmy Fern, (Sw.) Sw.
• Hymenophyllum recurvum, Ohiaku, Gaudich.
• Hymenophyllum refrondescens, Sodiro
• Hymenophyllum sieberi, Sieber's Filmy Fern, (C. Presl) Bosch
• Hymenophyllum sodiroi, C.Chr. C.Chr.
• Hymenophyllum tayloriae, Taylor's Filmy Fern Farrar & Raine
• Hymenophyllum tegularis, Elegant Filmy Fern (Desv.) Proctor & Lourteig
• Hymenophyllum tenerum, Bosch
• Hymenophyllum trifidum, Hook. & Grev.
• Hymenophyllum tunbrigense, Tunbridge Filmy Fern, (L.) Sm.
• Hymenophyllum undulatum, Wavy Filmy Fern, (Sw.) Sw.
• Hymenophyllom wilsonii Hook.
• Hymenophyllum wrightii Bosch

See also

Trichomanes, the members of which are also called filmy ferns.

External links

• Ferns of the genus Hymenophyllum observed in Cornwall
• More complete list of species
• Detailed photography of Hymenophyllum tunbrigense
• Filmy ferns webpage of School of Biological Sciences, University of Auckland, New Zealand
• J.E. Smith's original description of the genus online at Project Gutenberg