Cheilanthes(redirected from Cheilanthes sieberi subsp. sieberi)
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a fern member of the family Sinopteridaceae; known toxic components include ptaquiloside and thiaminase. Called also cloak ferns, rock ferns.
Cheilanthes distans, Cheilanthes tenuifolia
a rock fern that causes incoordination and somnolence in sheep.
has caused hemorrhagic disease, polioencephalomalacia and enzootic hematuria. Called also rock or mulga fern.
Cheilanthes sieberi subsp. sieberi
causes polioencephalomalacia ('jimmies') in grazing ruminants. Called also jimmy fern.