Species of fern
 ;templatestyles src="Template:Taxobox/core/styles.css" / ;
Parablechnum cordatum (synonyms "Blechnum cordatum", "Blechnum chilense"), the Chilean hard fern or costilla de vaca (Chilean Spanish for "cow's rib"), is a fern of the family Blechnaceae, native to Chile. It is also found in neighboring areas of Argentina and the Juan Fernández Islands.
It grows to , often developing a trunk-like appearance over time. The fertile fronds are more erect, with narrower pinnae, than the infertile ones.
This plant has gained the Royal Horticultural Society's Award of Garden Merit. 
Sources.
 ;templatestyles src="Reflist/styles.css" / ;