126 
CUMMINGS 
Thallus often many-leaved, lacerate and shaggy underneath. 
muhlenbergii alpina. 
Thallus of a grayish color. 
Fibrils pale. hirsuta. 
Fibrils black... cylindrica. 
Thallus without fibrils on the under side. 
Thallus of a grayish color. vellea tylorrhiza . 
Thallus blackish-brown. 
Upper surface of thallus smooth, not perforate on the edge. 
anthracina. 
Upper surface of the thallus not smooth, more or less perforate 
on the edge. 
Thallus smooth underneath. hyperborea. 
Thallus ridged underneath. erosa. 
160. Umbilicaria vellea tylorrhiza Nyl. 
Umbilicaria vellea tylorrhiza Nylander, Lich. Lapp. Orient. 122. 1867. 
Alaska, locality lost (Trelease, 1101) ; summit of White Pass (Tre- 
lease, 1002). Both sterile. New to Alaska. 
The only record we have for this continent is southern Colorado, 
Brandegee. Nylander records it for eastern Asia and Europe. 
161. Umbilicaria hirsuta (Ach.) Stenh. 
Umbilicaria hirsuta Acharius in Vet. Ac. Handl. 1794. t. 3, f. 1. 1821. 
Umbilicaria hirsuta Stenhammer, Sched. Crit. 4 : 1825. Dill. Hist. Muse. t. 
30. f. 117 .— Sowerby, Eng. Bot. t. 2486. 
Muir Glacier (Trelease, 1006). Sterile. New to Alaska. 
Professor Tuckerman does not give definite notes of its distribution 
in North America in his Syn. N. A. L. I find no mention of it in 
Arnold’s lists of the lichens of Newfoundland and Labrador. Lind¬ 
say does not mention it in his West Greenland Lichens. Branth and 
Gronlund, in Gronland’s Lichen-Flora, recognize the var. papyria , 
giving three stations for it. In the alpine and arctic regions of Europe 
it seems to be quite widely distributed. 
162. Umbilicaria muhlenbergii alpina Tuck. 
Umbilicaria vuihlcnbergii alpina Tuckerman, Syn. New Eng. Lich. 74. 1848. 
Locality lost (Trelease, 1004). New to Alaska. 
The variety was described from specimens from “Alpine rocks in 
the White and Green Mountains, Tuckerman; and in Hastings county, 
Canada, Macoun.” 
