184 LECAtfORA. 



Hall. Cj Organ Mountains, Texas, with a and &, Wright. 



Eocky Mountains, M. A. Brown. California, Bolander. The 

 New England lichen, however clearly related to the western 

 forms of a (through Anz. Ital. n. 158 ; comp. Tuck. Gen. p. 

 113) is always inferior, and passes at length into an effuse, 

 glebous, scarcely lobed condition, here observed on dead wood, 

 but in Kansas (E. Hall) on rocks, which is not the same with 

 the European v. disperso-areolata, of Schserer, and Anzi. 



6. L. Haydeni, Tuck. ; thallus sub-foliaceous, thickish, cori- 

 aceous-cartilagineous, lacero-laciniate, chinky ; greenish-straw- 

 coloured; beneath reddish-brown, naked; the divisions sinu- 



ately lobed, crenate, white tipped, convolute .... Obs. 



Lick. 3, I c. p. 297. 



Upon the earth ("in most places detached and blown about 

 by the wind, sometimes even drifted ; found in situ where the 

 ground is moist : there is no wood or rocks for it to be attached 

 to"), Laramie plains, Nebraska (infertile) (Hayden), Tuckerman 



1. c. 1864. The specimens are all alike, and could not have 



been attached to any substrate. Apothecia unknown. 



7. L. muralis (Schreb.) Schaer.; thallus tartareous-cartila- 

 gineous, crustaceous-foliaceous ; from glaucous-greenish becom- 

 ing pale-yellowish-brownish ; lobes of the circumference sinu- 

 ately divided, multifld, passing at the centre into crowded, 

 crenate scales, or finally areolate ; apothecia small to middling, 

 appressed; from pale -yellowish becoming tawny-brown, with 



an at length crenate and flexuous thalline margin. Spores 



ellipsoid, mic. Squamaria saxicola, Nyl. Scand. p. 133. 



Parmelia, Fr. L. E. p. 110, max. p. P. muralis, Schcer. Spirit, 

 p. 417, max. p. 



a. saxicola, Schser. ; lobes flattish, normally coloured. L. 



saxicola, Auctt. pi. 



b. Garovaglii, Anz.; the elongated, convex, flexuous lobes 



plicate-radious, normally coloured. Anz. Lich. Langob. n. 



270. Placodium, Koerb. Parerg. p. 54. 



c. diffracta, Fr.; thallus darkened more or less, and even 

 fulvous, and brick- coloured ; the scales reduced to discrete are- 

 oles and black-margined ; lobes of the circumference abbrevi- 

 ated. Lich. Eur. p. 111. 



d. Semitensis ; thallus reduced to scattered, small, glebous, 

 straw-coloured scales which become finally crenate-lobate and 



