how come Dryopteris carthusiana has the common name shield fern? is it because of the way it looks? plz answer and cite your sources so i know you are not just making up answers.
Why do they call Dryopteris carthusiana shield fern?
shield-shaped indusia ...http://rds.yahoo.com/_ylt=A0oGkkYGGONHEi...
arenas
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