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Gleicheniaceae
Sign in to saveThe forked ferns are the family Gleicheniaceae, which includes eight genera and about 160 known species. The formerly independent families Dicranopteridaceae and Stromatopteridaceae are generally included in the Gleicheniaceae, whereas the Dipteridaceae and Matoniaceae, although closely related, are considered separate families by most authors.
Species
FAMILY
- KingdomPlantae
- PhylumTracheophyta
- ClassPolypodiopsida
- OrderGleicheniales
- FamilyGleicheniaceae
ウラジロ科 Gleicheniaceae は、シダ植物の1群。シダ類では原始的な群の一つとされる。葉に成長点があり、無限成長出来る点が独特である。
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- Diplopterygium pinnatum1.jpg
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- Gleicheniaceae
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- 里白科
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Article
4 sectionsContents
- Description
- Systematics
- Footnotes
- References
The forked ferns are the family Gleicheniaceae, which includes eight genera and about 160 known species. The formerly independent families Dicranopteridaceae and Stromatopteridaceae are generally included in the Gleicheniaceae, whereas the Dipteridaceae and Matoniaceae, although closely related, are considered separate families by most authors.
==Description== These tropical ferns are the most widespread living lineage of Gleicheniales. Their rhizomes have a "vitalized" protostele or in some taxa a solenostele. The leaves are indeterminate, with pseudodichotomously forked leaves except in Stromatopteris, and free veins. Stromatopteris also differs from the other species in having an achlorophyllous and subterranean gametophyte. The sori are abaxial but not marginal and carry 5–15 exindusiate round sporangia each. These have a transverse-oblique annulus and contain 128 to 800 bilateral or globose-tetrahedral spores. The sori and sporangia mature at the same time, and the spores grow into surface-dwelling green prothalli beset with club-shaped hairs.