292 Howe: LICHENS COLLECTED IN THE YUKON REGION 
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. Alectoria ochroleuca (Ehrh.) Nyl. No. 67, near Dawson, over 
rocks on top of Moosehide Mt., Apr. 2, 1899, sterile. 7 
Alectoria sarmentosa Ach. No. 78, Sheep Camp, near Chil- 
coot Pass, Apr. 6, 1898, sterile. 
. Usnea plicata (L.) Web. No. 73, Dawson, on trees, Oct. 2, 
1898, sterile. There is also a specimen of this species in the 
. S. National Herbarium, collected in the Yukon, July 28, 
1889, by I. C. Russell. 
. Evernia prunastri var. thamnodes Flot. No. 72, hills above 
Dawson, on birch, Mar. 18, 1899, fertile. 
. Cetraria Oakesiana Tuck. No. 17, Lake Lindeman, Apr. 24, 
1898, fertile. This plant represents a new variety, a name for 
which is about to be published. Reference will be made to this 
record at the time of publication. 
Cetraria juniperina var. pinastri Ach. No. 14, Dawson, 
common, sterile, Oct. 2, 1898; no. 66, on slide rock just back 
of Dawson, Apr. 23, 1899, sterile, with dark spermogones. 
. Cetraria nivalis (L.) Ach. No. 18a, Lake Lindeman, May 8, 
1898, sterile. 
. Cetraria cucullata (Bell.) Ach. No. 186, Dawson, Apr. 8, 1899, 
sterile, no. 18, Lower Klondike, May 14, 1899, fertile. 
. Cetrarwa islandica (L.) Ach. No. 15, Dawson, Apr. 2, 1899, 
- fertile. The peculiarity of material from this region has been 
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remarked upon by Miss Cummings. The present material, 
though suggesting the variety crispa Ach., is decidedly nearer 
the species and only suggests a slightly transitional condition. 
. Cetraria Richardsonii Hook. No. 74, Summit of Moosehide 
Mt., near Dawson, May 1899, fertile. 
. Cetraria (Dactylina) arctica (Hook.) Tuck. No. 95, above 
Lake Lindeman, common, May 1808, sterile. 
. Ramalina pusilla Prév. No. 40, Dawson, on dead _ spruce, 
Mar. 1899, fertile. (= R. minuscula Nyl.) 
- Ramalina polymorpha Ach. No. 39, Dawson, on slide rock, 
Apr. 1899, sterile. 
The collection contains three specimens that are indetermin- 
able. 
No. 6, a Cladonia “too fragmentary for certain determination.” 
—Riddle. 
