THE WILLOWS OF ALASKA 337 



by the Ringgold and Rodgers U. S. North Pacific Exploring Expedi- 

 tion, C. Wright, 1S53-6. 



Port Clarence. — On the tundra of the mainland at sea level, Coville 

 and Kearney (No. 1S73), Trelease and Saunders (Nos. 3385, in part, 

 33S6, 33SS, 33S9), Brewer and Coe (No. 379). 



Poi7it Barrow. — At sea level, John Murdoch, 1882-3 (Nos. 6, 97). 



Porcupine River. — Without special locality, J. H. Turner, 1891. 



Under the names Salix retusa L. and Salix angloriim Cham, this 

 willow has been reported from St. Lawrence Island in Bering Sea, 

 St. Lawrence Bay on the Siberian side of Bering Strait, from Chamisso 

 Island and other points in Kotzebue Sound, and from Pelly Isle at the 

 mouth of the Mackenzie. 



S. phlebophylla was published by Andersson in 1858 through the 

 citation of an earlier published description, namely, that given under 

 the name Salix retusa by Hooker, Fl. Bor. Am. 2 : 153. 1838-9. 

 Hooker cited two specimens, one collected in Kotzebue Sound, 

 Alaska, by the botanists of Captain Beechey's expedition, the other 

 on the Arctic seashore of British America by Richardson. A mis- 

 understanding of the species phlebophylla on the part of some 

 authors, has been occasioned by the fact that Andersson referred to 

 phlebophylla other specimens which did not in reality belong to the 

 plant described by Hooker as " a very distinct and beautiful species, 

 with glossy, strongly nerved, perennial leaves, the skeleton nerves re- 

 maining in the lower parts of the stem." Andersson further compli- 

 cated the matter when he separated his complex phlebophylla into 

 three forms, by describing each of them as having '' capsulae glaber- 

 rimae." Both these mistakes, however, were corrected by Andersson 

 ten years later, when he described phlebophylla as having " capsulis 

 . . . tenuiter puberulis " and " foliis coriaceis nitidis sub lente punc- 

 ticulatis . . . utrinque nerv^oso-costatis, tertio anno in reticulum can- 

 cellatum ob parenchyma evanescens solutis."^ By these means An- 

 dersson clearly restricted the use of the name phlebophylla to the 

 plant to which I have here applied it. Dr. P. A. Rydberg has re- 

 cently ^ referred to phlebophylla several specimens of willow with the 

 lower surface of the leaves glaucous. These do not belong to the 

 skeleton-leaved species with which we are now dealing, and this latter 

 plant being therefore apparently left without a name Dr. Rydberg de- 

 scribed it as Salix palaeoneura^ basing his description on specimens 



^Anders, in DC. Prod. 16^: 290-91. 1868. 



2 Rydberg, Bull. N. Y. Bot. Gard. i : 275. 1899. 



3 Rydberg, Bull. N. Y. Bot. Gard. i : 267. 1899. 



