Century Dictionary and Cyclopedia
- An order or suborder of ferns, typified by the genus Osmunda. The sporangia are naked, globose, mostly pedicelled, reticulated, without annulus or with only mere traces of it near the apex, opening by a longitudinal slit into two valves. It embraces 2 genera, Osmunda with 6 species, and Todea with 4 species. Also
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