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L. calcarea (L.) Sommerf. Lapp. p. 102. Parmelia, Fr. Lichenogr. p. 187. Aspicilia, Koerb.
Parerg. p. 94. Lecanora cinerea, v. calcarea, Nyl. Prodr. p. 82; Lich. Scand.
p. 154.
var. Hoffmanni, Ach. Syn. p. 143. Lime-rocks. Cretaceous Sandstone, Deer Creek,
North Platte, Hayden.
L. subfusca (L.) Ach. Lichenogr. p. 393; Syn. p. 157. Parmelia, Ach. Mett., Fr. Summ. Veg.
Scand. p. 107. Tuckerm. Synops. p. 39.
var. crenulata, Schær. Spieil. p. 391. Lichen crenulatus, Dicks. Cr. 3, 14, t. 9, f. 1.
Lecanora subfusca v. umbrina, Nyl. Lich. Scand. p. 162. On cretaceous
sandstone, Deer Creek; and a similar, and scarcely distinguishable
from on dead branches of Sarcobatus, from the same locality, Hayden.
L. frustulosa (Dicks.) Ach. Lichenogr. p. 405; Syn. p. 159. Nyl. Prodr. Gall. p. 90; Lich. Scand. p.
166. Parmelia, Dicks. Cr. 3, 13. Sm. E. Bot. t. 2273. Parmelia,
Ach. Mett. p. 172. Fr. Lichenogr. p. 141. Schær. Spieil. p. 430; & Lich. Helv.
Hayden.
n. 478. Rocks. Base of the Big Horn Mountains first detected in this
country, on slate-rocks, in Vermont, by Mr. C.C. Frost.
L. atrocarpa, Duby Bot. Gall. 2, p. 669 (fide Nyl.) Nyl. Prodr. p. 88; Lich. Par. n. 39; Lich. Scand.
p. 168. L. fuscella, Mafal. Lecania, Ejusd. Ale. Gen. p. 12. Koerb. Syst. p. 122, t. 3,
f. 2. Rabenh. Lich. Eur. n. 238, 239. Patellaría, Naeg. in Hepp. Lich. Eur. n. 76.
L. subfusca, v. fuscella, Schær. Enum. p. 78, & herb. pr. p. fide Anz. Catal. Lich.
Sondr. p. 53. On dead branches of Sarcobatus vermicularis, growing common-
gled with L. subfusca v. crenulata, and L. sophodes; Hayden. Thallus thin,
fibrous, whitish. Apothecia minute; crowded; the disk at first flat, and
brownish; but becoming a little tumid and blackish, excluding the
thin, entire margin. Sporesacks club-shaped, 10-15-sporous. Spores
colourless; from along becoming dactyloid and regularly tetrablastic;
from twice to five times longer than wide. Paraphyses thickened and
brownish above. New to this country, though possibly not rare,
or it is easily confounded with small forms of L. subfusca,
and L. sophodes; from which it remarkably differs in its
dactyloid, tetrablastic spores.