THE WILLOWS OF ALASKA 319 



fore him would unite them, but the young leaves of bar clay i do not 

 always show the glaucous character of their lower surface, and even 

 the characteristic toothing of the margin is then often obscured also. 

 Salix calif ornica may be distinguished from cojnmutata by its hairy 

 capsules. 



9. SALIX PULCHRA Cham. Diamondleaf Willow. 



Plate XXXVIII. 



Salix pulchra Q.Yi.\rsi. \JV!\Tv2it.2i ^ \ 543. 1831. 



Salix phylicoides \-^T>Y.^'S,. Oefv. Vet. Akad. Foerh. 15 : 123. 1858. 



Salix fulcrafa A.-KT>'E.KS. Kongl. Vet. Akad. Handl. IV. 6: 139. 1867. 



An erect and bushy, though in arctic or alpine situations often pros- 

 trate, willow with diamond-shaped leaves bright green and shining 

 above, glaucous beneath, entirely smooth on both surfaces except when 

 very young, usually entire though sometimes sparingly crenate-denticu- 

 late near the middle, the stipules lanceolate, glandular-denticulate, and 

 persistent. It is a trim, handsome species, well deserving Chamisso's 

 name pidchra. The original description was based on specimens 

 collected by the Kotzebue expedition at Cape Espenberg in Kotzebue 

 Sound and on St. Lawrence Island in Bering Sea. The species ranges 

 from the coast of eastern Siberia through the islands of Bering Sea to 

 Point Barrow on the Arctic coast of Alaska, to Kadiak Island on the 

 south coast, and to the upper Yukon valley in the interior. 



The specimens examined are as follows : 



Siberia. — On the coast of Bering Sea, between St. Lawrence and 

 Mechigme bays, James T. White, 1894. 



Arctic Seacoast of Alaska. — At Point Barrow, John Murdoch, 



1SS2-3. 



Kotzebue Sound. — On the Kowak or Putnam River, G. M. Stoney, 

 1SS6. 



Port Clarence. — On the tundra, often prostrate, sometimes a meter 

 and a half in height, reaching at least 5 cm. in diameter of trunk, 

 Coville and Kearney (No. 1876), Trelease and Saunders (Nos. 3374 

 to 3376), Brewer and Coe (Nos. 377, 378), Cole. 



St. Lawrence Island. — At Northeast Cape, Coville and Kearney 

 (No. 2001), Trelease and Saunders (No. 3445). 



St. Matthew Island. — On St. Matthew, Coville and Kearney (No. 

 20SS) Brewer and Coe (No. 466). 



Pribilof Islands. — On St. Paul Island, C. Hart Merriam, 1891. 



Shumagin Islands. — Common at sea-level on both Popof and Unga, 

 Coville and Kearney (No. 1796a), Trelease and Saunders (Nos. 3453, 

 3454^ 3454a, 3458), C. H. Townsend, 1893. 



