204 HERRE 



Parmelia physodes Bitter, Hedwigia, 40: 218. 1901. 



Parmelia physodes Herre, Proc. Wash. Acad. Sci. 7: 354. 1906. 



Parmelia physodes Tuck. Syn. N. Am. Lich. I: 59. 1882, (in part). 



Thallus suborbicular, deeply cut, more or less inflated, loosely 

 attached to the substratum; lobes numerous, sinuous, many-cleft, 

 plane or convex; becoming crowded centrally, somewhat ascendant 

 and complicate; ends of lobes often terminating in white soredia; 

 surface smooth, becoming tuberculate; color varying from greenish 

 pearl-gray, to slate-color or green; beneath dull black or dusky, 

 naked, much wrinkled; sometimes edged with chestnut; yellow or 

 greenish yellow with KOH, turning gradually through orange to 

 dark red ;CaQ 2 0,-. 



Apothecia more or less cup-shaped; margin crenulate; disk chest- 



4.8-6 

 nut; spores elliptical to globose, /: _ o <" 



This lichen occurs very sparingly throughout our range; most 

 abundant on old fences and trees in the foothills; probably cosmo- 

 politan in its distribution. 



17. PARMELIA ENTEROMORPHA Ach. 



Parmelia enteromorpha Ach. Meth. Lich. 252. 1803. 



Parmelia enteromorpha Bitter, Hedwigia, 40: 233, pi. n. f. 11,12, 



and ij. 1901. 



Parmelia enteromorpha Herre, Proc. Wash. Acad. Sci. 7 : 355. 1906. 

 Parmelia physodes, varieties enteromorpha and vittata Tuck. Syn. N. 



Am. Lich. I: 60. 1882. 



Thallus sub-orbiculate, soon becoming large, expanded, and inde- 

 terminate; deeply cleft, loosely attached to the substratum; lobes 

 very numerous, more or less inflated, elongated, lax or pendulous, 

 irregularly divided; usually narrow but occurring in all shapes from 

 linear or terete to broad and flat, these last usually short and mar- 

 ginally imbricate; surface smooth and convex, or more rarely 

 wrinkled, sometimes papillate; often densely sprinkled with black 

 specks, the spermogonia; color green, but varying from gray to 

 dingy brownish or even dusky; beneath black or dark brown, wrink- 

 led, naked; more or less beset with holes in the lower cortex; yellow 

 or greenish yellow with KOH; CaCl 2 2 -. 



