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Dryopteris
(redirected from shield fern)

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Dryopteris
a genus of the fern family Aspleniaceae; rhizomes contain a toxin thought to be a thiaminase and which causes somnolence, stumbling gait and blindness due to encephalopathy in sheep and cattle. Includes D. borreri, D. filix-mas. Called also male fern.
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DRYOPTERIS Adanson Shield fern Rhizomes creeping, covered with tan scales; fronds 60-130 cm long; blades pinnate-pinnifid, 45-90 cm long, elliptic-lanceolate; sori round, medial; indusia peltate.
Pteridophytes of southeast Alabama: Dichotomous keys, illustrations ... by Woods, Michael; Diamond, Alvin R., Jr / Journal of the Alabama Academy of Science
Voles had eaten the tender fiddleheads from the center of several established soft shield ferns.
Farmers hope rains take toll on voles by The Register-Guard (Eugene, OR)
Of the 1,244 federally listed species, only 13 are currently listed as endangered or threatened in Alaska, and we expect that all are present in national parks except the endangered Aleutian shield fern (Polystichum aleuticum) and leatherback sea turtle (Dermochelys coriacea).
Alaska: a great land for wildlife by Dratch, Peter A.; DeBruyn, Terry D. / Endangered Species Update
 
 
 
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