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{{SPlantbox
{{SPlantbox
|familia=Blechnaceae
|genus=Blechnum
|genus=Blechnum
|taxo_author=L.
|Temp Metric=°F
|Temp Metric=°F
|jumpin=If this plant info box on watering; zones; height; etc. is mostly empty you can click on the edit tab and fill in the blanks!
|jumpin=If this plant info box on watering; zones; height; etc. is mostly empty you can click on the edit tab and fill in the blanks!
|image=Upload.png
|image=Blechnum chilense 1.jpg
|image_width=240
|image_width=240
|image_caption=Blechnum cordatum
}}
}}
'''''Blechnum''''' ('''hard fern''') is a genus of between 150-220 species of [[fern]]s in the family [[Blechnaceae]], with a [[cosmopolitan distribution]]. By far the greatest species diversity is in [[tropical]] regions of the [[Southern Hemisphere]], with only a few species reaching cool temperate latitudes in the Southern Hemisphere (notably ''[[Blechnum penna-marina|B. penna-marina]]'', south to [[Cape Horn]], [[Chile]], the [[the world's most southern|southernmost]] fern in the world) and [[Northern Hemisphere]] (notably ''[[Blechnum spicant|B. spicant]]'', north to [[Iceland]] and northern [[Norway]]).
Most are [[herbaceous]] plants, but a few species (e.g. ''B. buchtienii'' and ''B. schomburgkii'' in [[Ecuador]]) are [[tree fern]]s with stems up to 3 m tall.
Several species are grown as ornamental plants in gardens.
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{{Inc|
Blechnum (Greek name for some fern). Polypodiaceae. Rather coarse greenhouse ferns, with pinnatifid or pinnate Lvs., and rows of almost continuous son parallel to the midvein and close to it, covered with a membranous indusium. Blechnum is here recognized as including the species sometimes classified under the generic name Lomaria in addition to those species which all writers agree to put in Blechnum. The differences on which Lomaria has been based are very slight and are not recognized by leading European fern students. Besides, if the species included in Lomaria are kept separate, it is practically certain that they must be classified under the older name Struthiopteris.
Blechnum (Greek name for some fern). Polypodiaceae. Rather coarse greenhouse ferns, with pinnatifid or pinnate Lvs., and rows of almost continuous son parallel to the midvein and close to it, covered with a membranous indusium. Blechnum is here recognized as including the species sometimes classified under the generic name Lomaria in addition to those species which all writers agree to put in Blechnum. The differences on which Lomaria has been based are very slight and are not recognized by leading European fern students. Besides, if the species included in Lomaria are kept separate, it is practically certain that they must be classified under the older name Struthiopteris.
==Varieties==
==Species==
;Selected species
*''[[Blechnum ambiguum]]'' (C.Presl) Kaulf. ex C.Chr.
*''[[Blechnum blechnoides]]''
*''[[Blechnum brasiliense]]'' Desv.
*''[[Blechnum buchtienii]]'' Rosenst.
*''[[Blechnum cartilagineum]]'' Sw.
*''[[Blechnum chilense]]'' Kaulf.
*''[[Blechnum cordatum]]'' (Desv.) Hieron. (syn. ''B. chilense'')
*''[[Blechnum discolor]]''
*''[[Blechnum durum]]''
*''[[Blechnum filiforme]]''
*''[[Blechnum fluviatile]]''
*''[[Blechnum gibbum]]''
*''[[Blechnum lanceola]]'' Sw.
*''[[Blechnum magellanicum]]''
*''[[Blechnum nigrum]]''
*''[[Blechnum nipponicum]]'' (Kunze) Makino
*''[[Blechnum nudum]]'' <small>([[Labill.]]) [[Georg Heinrich Mettenius|Mett.]] ex [[Luerss.]]</small>
*''[[Blechnum obtusatum]]'' (Labill.) Mett.
*''[[Blechnum occidentale]]'' [[Carl Linné|L.]]
*''[[Blechnum orientale]]'' [[Carl Linné|L.]]
*''[[Blechnum penna-marina]]'' (Poir.) Kuhn
*''[[Blechnum schomburgkii]]'' (Klotzsch) C. Chr.
*''[[Blechnum serrulatum]]'' Rich.
*''[[Blechnum spicant]]'' ([[Carl Linné|L.]]) Sm.
*''[[Blechnum vittatum]]'' Brack.
*''[[Blechnum volubile]]'' Kaulf.
* ''[[Blechnum wattsii]]'', [[Mary Tindale|Tindale]] Hard Water Fern
==Gallery==
==Gallery==