familyOsmundaceae
genusOsmunda
Show Lower Taxa
Difference between revisions of "Osmunda"
Sp. Pl. 2: 1063. 1753; Gen. Pl. ed. 5, 484, 1754.
Etymology: Saxon, Osmunder, name for Thor, god of war
Treatment appears in FNA Volume 2.
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name=Osmunda | name=Osmunda | ||
| − | |author=R. David Whetstone; T. A. Atkinson | + | |author=R. David Whetstone;T. A. Atkinson |
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|genus=Osmunda | |genus=Osmunda | ||
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Revision as of 19:47, 16 December 2019
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.
Distribution
Nearly worldwide, tropical and temperate regions.
Discussion
Species 10 (3 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Fertile leaves with pinnae monomorphic, all spore-bearing; tuft of hairs persistent on abaxial surface of pinnae near base. | Osmunda cinnamomea |
| 1 | Fertile leaves with pinnae dimorphic, some spore-bearing, some not; tuft of hairs absent on abaxial surface of pinnae near base. | > 2 |
| 2 | Sterile leaves 2-pinnate with pinnules sessile. | Osmunda ruggii |
| 2 | Sterile leaves pinnate-pinnatifid or 2-pinnate with pinnules stalked. | > 3 |
| 3 | Fertile pinnae apical, sterile leaves 2-pinnate. | Osmunda regalis var. spectabilis |
| 3 | Fertile pinnae medial, sterile leaves pinnate-pinnatifid. | Osmunda claytoniana |