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Osmunda L.

Osmunda (en), Osmonde (fr)

Genus

Pteridophytes > Osmundales > Osmundaceae

Characteristics

Plants terrestrial, moderate-sized to large. Rhizome erect to shortly creeping, stout, woody, without scales. Fronds dimorphic or more commonly hemidimorphic with dimorphic pinnae; stipes arising as a crown at apex of rhizome, ± hairy when young, base of stipe swollen and with lateral flaplike stipules; lamina 1-or 2-pinnate, fertile portions reduced to a midrib with almost no lamina present; pinnae articulate to rachis. Sporangia large, naked, with a small patch annulus. 2n = 44.
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Terrestrial ferns. Rhizomes thick, erect, covered with persistent stipe bases. Fronds 1-2-pinnate, covered with hairs when very young, wholly or partially dimorphic; veins free. Sporangia in dense clusters, replacing the lamina of some or all the pinnae on fertile fronds. Spores trilete.
Plants terrestrial. Stems creeping; tips often somewhat erect. Leaves dimorphic; fertile leaves erect, often notably smaller than sterile leaves in length and width. Blades 1--2-pinnate; pinnae monomorphic to dimorphic, pinnatifid or pinnate.
Fertile pinnae quite different from sterile, lacking a green lamina; lamina of sterile pinnae not translucent
Coarse ferns with pinnate-pinnatifid or bipinnate lvs. 10, cosmop
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Growth form herb
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Foliage retention deciduous
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Root system rhizome
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Hardiness (USDA) 4-9

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Cultivation

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Images

Osmunda unspecified picture

Distribution

Osmunda world distribution map, present in China, New Zealand, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:30041615-2
WFO ID wfo-4000027394
COL ID 63H28
BDTFX ID 86911
INPN ID 195577
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Osmunda Struthiopteris Plenasium Aphyllocalpa

Lower taxons

Osmunda herbacea Osmunda hilsenbergii Osmunda japonica Osmunda angustifolia Osmunda javanica Osmunda spectabilis Osmunda vachellii Osmunda mildei Osmunda abyssinica Osmunda hybrida Osmunda banksiifolia Osmunda lancea Osmunda regalis
WorldFloraDB 2024