76 
CUMMINGS 
lease, 936 in part) ; Port Clarence (Trelease, 890); Cape Nome 
(Setchell) ; St. Michael Island (Setchell). Collected on Alaska Pen¬ 
insula by Dr. Bean, and on St. George Island by J. M. Macoun. 
All the specimens are on rock and are associated with various spe¬ 
cies of Part)ielia , Lecanora , Pertusaria , and Lecidea. This is one 
of the most widely distributed of alpine and arctic lichens. Small 
bits of the sterile thallus were found with several rock specimens which 
are not listed above. 
14. Buellia geographica contigua (Schaer.). 
Lecidea geographica a contigua Schaerer, Spicil. 124. 1828. 
Haenke Island, Disenchantment Bay (Coville and Kearney, 1116) ; 
Kadiak (Trelease, 897, 898, each in part, 901); Hall Island (Tre¬ 
lease, 891, 891# in part). New to Alaska. 
Associated with species of Pertusaria , Lecanora , and Lecidea . 
No. 1116 has the thallus more distinctly areolate than any specimen in 
the Tuckerman Herbarium. 
15. Buellia geographica atrovirens (L.)Tuck. 
Licheti atrovirens Linn.eus, Spec. PI. ed. 2. 2 : 1607. 1764. 
Summit of White Pass, 3000 ft. (Trelease, 888, in part). New to 
Alaska. 
On rock, associated with Lecanora cinerea gibbosa. 
16. Buellia petraea Tuck. 
Lecidea petrcea Wulf. in Jacq. Coll. Ill, 116. t. 6. f 2. a. 1789. 
Buellia petrcea Tuckerman, Gen. Lich. 190. 1872. — Sowerby, Eng. Bot./. 246. 
Broughton Strait (Trelease, 850) ; Plover Bay, Siberia (Trelease, 
993 ) > St. Michael (Setchell). 
The specimen from Broughton Strait is on wood, those from Plover 
Bay and St. Michael on rock. The species has been recorded by 
Rothrock from St. Paul Island, from Kadiak and Port Clarence, 
Alaska, and from Plover Bay, Siberia. 
17. Buellia petraea grandis (Flk.) Tuck. 
Lecidea petrcea (3 fuscoatra C. grandis Floerke, Flora. 620. 1828. 
Buellia b. Tuckerman, Syn. N. A. L. 2: 102. 1888. 
Alaska, locality lost (Trelease, 968). New to Alaska. Previously 
reported from Greenland to California and southward. 
Compares well with the specimen in the Tuckerman Herbarium 
which was collected in the White Mountains of New Hampshire. 
