Osmunda

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Osmunda

 

a genus of perennial ferns of the family Osmundaceae. The stems are massive and usually short; they are topped by a crown of large leaves measuring as much as 3 m long. The pinnate leathery or filmy leaves are divided into vegetative and spore-bearing parts. Sometimes there are separate vegetative and spore-bearing leaves. There are about 15 species, growing in humid and swampy regions, primarily in the subtropics of Eurasia, Africa (including Madagascar), and the Americas. The USSR has three species. The royal fern (O. regalis), with leaves up to 1.5 m long, occurs in western Transcaucasia; the two other species are found in the Far East. Some species are ornamental.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Se designa como lectotipo de Osmunda spectabilis var.
Se designa como lectotipo de Osmunda imbricata Kunze al especimen depositado en LE, duplicado del original en LZ que fue destruido.
El material americano referido previamente a Osmunda regalis corresponde a Osmunda spectabilis, ya que la especie O.
A Brigitte Zimmer (B) por enviar imagenes del ejemplar tipo de Osmunda gracilis y por sus aclaraciones nomenclaturales, a Jefferson Prado (Instituto de Botanica, Brasil), por sus comentarios respecto a la tipificacion de Osmunda spectabilis y Andres Gonzalez (MVFA).
Some varieties of the amphigean species of Osmunda. Rhodora 32: 71-76.
The paraphyly of Osmunda is confirmed by phylogenetic analyses of seven plastid loci.
Evolution of the fern genus Osmunda. Contributions from the Museum of Paleontology.
Osmunda (Osmundaceae) from the Triassic of Antarctica: An example of evolutionary stasis.
A New Allotetraploid Species of Osmunda (Osmundaceae).