The western sword species of this spore-bearing plant is found in the redwood forests of the Pacific coast
It is so common within the 
redwood forest, it has been said that if ... Western Chain Fern [DOC] [TLE] Biology 112 (Thursday afternoon) Field Guide [PAR] Seashore Life of the Northern Pacific Coast: An Illustrated Guide to Northern ... 
Abundance: very common along Western coast of U.S. from Alaska to California 
.... Spore-bearing sacs are larger than sword ferms and are not covered by 
indusium.