Cryptogramma acrostichoides

A fern found in rocky areas near timberline in much of the western US and northwards. Similar in general appearance to Cystopteris, but with marginal sori borne on narrower leaflets than those of the vegetative leaves.

Plant habit near Donner Pass in the Sierra Nevada, CA, 30 Jul 2006.

A fertile leaf (sporophyll) near Donner Pass, 30 Jul 2006.

A sterile leaf (trophophyll) near Donner Pass, 30 Jul 2006.

Plant habit in the La Sal Mts., UT, 6/18/06. The old, browned leaves with narrow leaflets are last year's sporophylls.

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