290 Howe: LICHENS COLLECTED IN THE YUKON REGION 
38. 
This species was included by Tuckerman under’ the var. 
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Lecanora rugosa Nyl. No. 89, Dawson, Apr. 1899, fertile. 
allophana Ach. of the preceding species. 
. Lecanora epibrya Nyl. No. 30, Dawson, July 1808, fertile. 
This species was included by Tuckerman under the var. 
hypnorum Schaer. of subfusca. 
. Lecanora castanea (Hepp) Th. Fr. No. 88, Dawson, Mar. 27, 
1899, fertile. 
. Lecanora ventosa (L.) Ach. No. 58, Lake Lindeman, May 
1898, fertile. 
. Lecanora calcarea (L.) Sommf. No. 56, Lower Klondike 
River, Apr. 1899, fertile. 
. Lecanora (Acarospora) Schleicheri (Ach.) Nyl. No. 65, river 
bluff just below Dawson, Apr. 23, 1899, fertile. 
. Placodium (Candelariella) vitellinum. (Ehrh.) Naeg. & Hepp. 
No. 83, Dawson, May 1899, fertile. 
. Placodium ferrugineum (Huds.) Hepp. No. 96, Dawson, Sept. 
1898, fertile. Determined by Dr. Riddle. No. 27, Dawson, 
on willows, Sept. 1898, fertile, determined by Dr. Hasse as 
the synonymous Blastenia ferruginea (Huds.) Arn. 
. Placodium Jungermanniae (Vahl) Tuck. No. 26, Dawson, 
Sept. 1898, fertile. 
- Placodium (Caloplaca) elegans (Link) DC. No. 25, Dawson, 
Oct. 1898, fertile. 
. Urceolaria (Diploschistes) scruposa (L.) Nyl. No. 23, Moose- 
hide Mt., back of Dawson, Apr. 2, 1899, fertile. 
. Thelotrema lepadinum Ach. No. 60, Sheep Camp, Dyea Cr., 
Apr. 1898 
Family COLLEMACEAE 
. Collema melaenum Ach. No. 94 (2 packets), Klondike River, 
Mar. 18, 1899, no. 44, Lower Klondike, Sept. 18, 1898, both 
fertile. 
. Collema melaenum var. polycarpum Schaer. No. 46, Dawson, 
Apr. 3, 1899, fertile. 
. Leptogium myochroum var. saturninum (Schaer.) Tuck. No. 
45, Dawson, Apr. 3, 1899, sterile. 
(?) Ephebe pubescens Fr. No. 91, Dawson, July 1898, fertile. 
‘‘ Appears partially carbonized by fire.’’—Hasse. 
