Hymenophyllum
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.
| Hymenophyllum | |
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| A plate featuring Hymenophyllum species from The Ferns of Great Britain and Ireland | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Hymenophyllales |
| Family: | Hymenophyllaceae |
| Subfamily: | Hymenophylloideae Burnett |
| Genus: | Hymenophyllum Sm. |
Species
- H. abruptum Hook.
- H. acanthoides (Bosch) Rosenst.
- H. acutum (C.Presl) Ebihara & K.Iwats.
- H. adiantoides Bosch
- H. album (Blume) Parris
- H. alishanense De Vol
- H. alveolatum C.Chr.
- H. asplenoides (Sw.) Sw. – Caribbean filmy fern
- H. axillare Sw.
- †H. axsmithii Pigg et al (Ypresian, NW North America)[1]
- H. australe Willd.
- H. barbatum (Bosch) Baker – beard filmy fern[2]
- H. brachypus Sodiro
- H. brevifrons Kunze – Antilles filmy fern
- H. contractile Sodiro
- H. cristatum Hook. & Grev.
- H. cupressiforme Labill. – common filmy fern
- H. decurrens (Jacq.) Sw. – Sierra de Luquillo filmy fern
- H. demissum (G. Forst.) Sw.
- H. falklandicum Baker
- H. flabellatum, Labill.
- H. fragile (Hedw.) Morton – fragile filmy fern
- H. frankliniae Colenso – rusty filmy fern
- H. fucoides (Sw.) Sw. – graceful filmy fern
- H. helicoideum Sodiro
- H. hirsutum (L.) Sw. – hairy filmy fern
- H. howense Brownlie
- H. lanatum Fée – woody filmy fern
- H. lanceolatum Hook. & Arn. – palaihinahina
- H. lineare (Sw.) Sw. – longtom filmy fern
- H. macrothecum Fée – mountain filmy fern
- H. megistocarpum (Copel.) C.V.Morton
- H. microcarpum Desv. – creeping filmy fern
- H. moorei Baker
- H. nanum Sodiro
- H. obtusum Hook. & Arn. – palailaulii
- H. paucicarpum Jenman – Jamaican filmy fern
- H. polyanthos (Sw.) Sw. – smooth filmy fern, Korean filmy fern[2]
- H. rarum R.Br.
- H. recurvum Gaudich. – ohiaku
- H. refrondescens Sodiro
- H. sieberi (C. Presl) Bosch – Sieber's filmy fern
- H. sodiroi C.Chr.
- H. tayloriae Farrar & Raine – Taylor's filmy fern
- H. tegularis (Desv.) Proctor & Lourteig – elegant filmy fern
- H. tenerum Bosch
- H. trifidum Hook. & Grev.
- H. tunbrigense (L.) Sm. – Tunbridge filmy fern
- H. undulatum (Sw.) Sw. – wavy filmy fern
- H. wilsonii Hook. – Wilson's filmy fern
- H. wrightii Bosch – Asian filmy fern
See also
- Trichomanes, the members of which are also called filmy ferns.
References
- Pigg, K. B.; DeVore, M. L.; Greenwood, D. R.; Sundue, M. A.; Schwartsburd, P.; Basinger, J. F. (2021). "Fossil Dennstaedtiaceae and Hymenophyllaceae from the Early Eocene of the Pacific Northwest". International Journal of Plant Sciences. 182 (9): 793–807. doi:10.1086/715633. S2CID 239036762.
- English Names for Korean Native Plants. Pocheon: Korea National Arboretum. 2015. p. 494. ISBN 978-89-97450-98-5 – via Korea Forest Service.
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
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