Cetraria glauca (L.) Ach.

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L1CHENES EXSICCATI	;	Mmm
Distributed by the University of Colorado Museum, Boulder
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No. 4. Ceiraria glauca (L.) Ach.	BOTANICAL.
garden
Method. Lich. 296. 1803. — Lichen glaucus L., Sp. PI. 1148. 1753.
U.S.A. COLORADO. BOULDER COUNTY: on north-facing granite ledges of canyon wall, Bull Gulch, foothills of Front Range between Plainview and Eldorado Springs, alt. 2,000 m, rare and local, not previously known from the southern Rocky Mountains.
2 May 1959	W. A. Weber & James Erdman S 18,991
botanical
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