14 JOURNAL OF THE ARNOLD ARBORETUM [vol. i 



hardly be any doubt that his 5. pallescens ^ with the exception of f . alpigena 

 and his S. lucida pallescens are the same as S. serissima. The type was col- 

 lected by Bourgeau on the Saskatchewan and of f . iiiriisquama by the same 

 collector *'ad lac. Winnipeg." Andersson describes the leaves as " subtus 

 I^allide glaucescentibus " and the fruits as ** distinctius pedicellatis/' and 

 there is no other willow to which the name could be applied in the region 

 from which the type came. 



S. arguta erythrocoma Andersson or *S. crijthrocoma Barratt which is re- 

 garded by Rydberg (FL Rocky Mts. 191 [1917]) as a good species represents 

 a mixture of forms from Lake Winnipeg (belonging, so far as I can judge by 

 the specimen in Herb. G., to S. serissima) and from the Columbia (collected 

 probably at the mouth of this river in April-May 1825 by Dr. Scouler). 

 I have seen a si>ecimen of the last named under No. 62 in Ilerl). X. consist- 

 ing of male and female flowers. I cannot distinguish it from typical S. 

 lasiandra. There is another specimen under No. 61 of Dr. Scouler from the 

 Columbia in Herb. N. also lal>eled S. erythrocoma Barratt. It consists of 

 very young female flowers of S. lasiandra, and also of a branch with male 

 aments of which the flowers do not seem to be normal. It is too poor to be 



properly identified. 



According to Fernald who gave an excellent account of this species it 

 ranges " from the Ilousatonic Valley, Massachusetts, to the north shore of 

 Lake Superior, south to Morris County, New Jersey, western New York, 

 northern Ohio, Michigan, Wisconsin, and Minnesota." I have seen it 

 also from northeastern Indiana (Steuben and La Grange Counties). In 

 the northeast its range extends to Newfoundland (Valley of Exploit 

 River) and Anticosti Island, whence its northern limit seems to run to the 

 eastern shores of James Bay and to reach its northernmost point in Kee- 

 w^atin, on the Severn River (J. M. Macoun, No. 2028, 0.), while from fur- 

 ther west I have seen specimens from near Edmonton, Alberta, From here 

 the western borderline runs south to Banff and Crow's Nest Lake in Al- 

 berta and then turns to the east to Sidney In Manitoba and to north- 

 eastern Minnesota (St. Louis Comitv). 



6. S- lasiandra Bentham, PI. Hartweg. 335 (1857). — Torrey in Pacific 

 R.R. Rep. IV. Bot. 138 (1857). — Sargent, Rep. For. N. Am. 10 census 

 U.S. IX. 167 (1884), excl.var.;Silva N.Am. IX. 115, t. 409 (1890), excl var.; 

 Man. Trees 173, fig. 145 (1905). — Bebb in Bot. Gaz. xvi. 103 (1891).— 

 Greene, Man. Bot. San Francisco Bay, 399 (1894). — Sudworth in Bull. 

 U.S. Dept. Agrlc. Div. For. xiv. 120 (Nomencl. Arb. FL) (1897), pro parte 

 max. — Ball in Trans. Acad. Sci. St. Louis, ix. 71 (1899), pro parte; in 

 Coulter and Nelson, New Man. Rocky Mts. Bot. 130 (1909). — Howell, 



^ This name cannot be used according to the Philadelphia Code because there is an earlier 

 S. pallescens Schleicher (Cat. PI. Helv. ed. 3. 26. 1815) which had probably been published 

 first in ed. 2 (1807). The International Rules would permit the use of the name because 

 Schleicher's name is a nomen nudum and represents nothing but a form of S. nigricans Smith, 

 but as it is doubtful whether Andersson's binomial can be regarded as a correct publication 

 of a species or only of a subspecies I abstain at present from using this name. 



