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Aspidotis californica
http://elib.cs.berkeley.edu/imgs/512x768/5208_1611/1618/0001.jpeg
Photograph of California lacefern.
Aspidotis californica (Hook.) Copel.
http://www.calflora.org/cgi/calflora_query?where-calrecnum=759&one=T&special=photo
Data on distribution in California with image.
Aspidotis densa
http://www.esb.utexas.edu/tchumley/wyomap/plp/aspden.pdf
Distribution map from Atlas of the Vascular Flora of Wyoming in pdf format.
Aspidotis densa (Brackenr.) Lellinger
http://www.calflora.org/cgi/calflora_query?where-calrecnum=761&one=T&special=photo
Data on this species in California with link to photographic images.