Howe: LICHENS COLLECTED IN THE YUKON REGION 289 
25. Cladonia cariosa (Ach.) Spreng. No.5, Lake Lindeman, May 
1898, fertile. This specimen approaches var. squamulosa 
(Miill.) Wain. 
. Cladonia cariosa {. majuscula Del. No. 80. Dawson, May 
1898, fertile. This plant was labeled by Mr. T. A. Williams 
Cladonia cariosa Dawsoniana var. nov. I forwarded it to Dr. 
Scriba who, though hindered by the limited material, writes in 
litt. Jan. 8, 1911—-‘‘with good probability I determine this 
plant as C. cariosa f. majuscula Del.” (Duby, Bot. Gall. 2: 
632. 1830), and proceeds to discuss the case at length. 
27. Philophorus cereolus var. acicularis (Ach.) Tuck. No. 173, 
Cafion City, Dyea Cr., Mar. 1808, fertile. 
28. Stereocaulon tomentosum Fr. No. 28. Dawson, Oct. 1898, 
fertile. 
29. Stereocaulon tomentosum var. simplex Riddle. No. 84, Daw- 
son, May 24, 1899, fertile. 
30. Stereocaulon paschale (L.) Ach. No. 97, Lake Lindeman, 
May 1808, fertile. 
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Family LECANORACEAE 
31. Pertusaria dactylina (Ach.) Nyl. No. 47, Lake Lindeman, 
May 12, 1898, fertile. 
. Pertusaria rhodocarpa Koerb. No. 77,Sheep Camp, Dyea Cr., 
Apr. 1808, fertile. 
. Lecanora lentigera (Web.) Ach. No. 64, river bluffs just below 
Dawson, Apr. 13, 1899, fertile. No. 87, (?) Lecanora crassa 
(Schaer.) Dawson, Apr. 13, 1899, fertile, was considered by 
Tuckerman as identical with this species. 
. Lecanora thamnoplaca Tuck. No. 51, Dawson, Apr. 1899, 
fertile. 
. Lecanora pallida (Schreb.) Schaer. No. 63a, Lake Lindeman, 
May 1898, and no. 99, Sheep Camp, Dyea Cr., Apr. 1898, 
both fertile. 
36. Lecanora subfusca var. argentata Ach. | No. 51, Dawson, Apr. 
1899. 
. Lecanora subfusca var. campestris Schaer. No. 29, 20 miles 
above Dawson on the Yukon, June 20, 1898, and no. 57, 
Dawson, Apr. 1899, both fertile. 
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