| Dryopteris |
a large genus of ferns of the family Polypodiaceae. D. fi´lix-mas is the male or male shield fern (filix mas), a poisonous species that yields oil of male fern, formerly used as an anthelmintic.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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