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Squamarra crassa (Huds.) DC. Nyl. Lich. Scand. p. 130. On the earth, with friable,
Placodium in the bad lands of Judith, Nebraska, Hayden. The first,
and as yet, only indication of this well-known European lichen in North
America. The specimen is infertile.
Parmelia, Schar. Specil. p. 435.
S. rubrina (Vill.) Hoffm. Pl. Lich. 2, p. 27, t. 32, f. 1. S. chrysoleuca (Sm.) Nyl. Lich. Scand. p. 131.
Rocks. Snake forks of the Columbia, and elsewhere, Hayden. Very abun-
dant and fine in the mountains of Texas (Wright) and New Mexi-
co (Fendler)
S. melanophthalma (Ram.) DC. Nyl. Lich. Scand. p. 131. Lecanora chrysoleuca, v. opaca, Ach. Rocks.
Cretaceous sandstone, Deer Creek, North Platte; Red Buttes, North Platte;
and at the base of the Big Horn Mountains, Hayden. An areolate form,
of small scales; but these are occasionally better developed, when the lichen
scarcely differs from the last, except in its blackish apothecia. W Wright
found this in the Organ mountains of Texas.
S. Haydeni, Tuck. ms.: thallo subfoliaceo crassiusculo coriaceo-cartilagino lacero-laciniato virid-
i-stramineo subtus versus centrum rufofuscescente laciniis lobato-divisis ma-
rgine albicante crenulatis convolutis; apotheciis. . . . . .
Published in Tuck.
on the earth, in calcareous soil, Laramie Plains; where, according to Dr.
Syn. p.
Hayden, "it covered many square miles, in most cases detached and
184.
blown about by the wind; sometimes even drifted: It is found in situ
where the ground is moist, where it is most abundant at times.
Obs. Lich. 3.
There is no wood or rock for it to be attached to." Hayden, litt.
Proc. Am. Ac.
Thallus apparently free; irregularly shaped; of rather thick and leathery,
Arts & Sci.
deeply and irregularly divided, elegantly white-notched lobes, which are
12 April 1867
rolled closely backwards, or together, concealing the under surface. This is
p. 267
often similar to the upper, at the tips, but becomes reddish-brown towards
the centre, agreeing in this with S. rubrina; like which also the tips of
the lobes become sometimes blackish beneath. I find neither apothecia nor