iQig] SCHNEIDER— AMERICAN WILLOWS 6l' 



specimens collected at Great Slave Lake, Mackenzie, which, in my 

 opinion, are most closely related to var. aciUifolia, but at least some 

 of them seem to represent a very villose form of it, for which I 

 propose the name: S. glauca var. acutifolia f. poliophylla,''' 

 forma nov. — A typo nonnisi differre videtur ramis annotinis densius 

 villoso-lanuginosis etiam vetustioribus tomento lanuginoso pl.m. 

 obtectis, foliis superne pl.m. laxe adpresse sericeo-lanuginosis subtus 

 villo densissimo moUi pl.m. adpresso albo vestitis. The type is 

 Great Slave Lake, Fort Rae, July 28, 1901, E. A. and A. E. Preble 

 (no. 139, fr.; W.; folia inferiora elliptica vel oblongo-elKptica, 

 utrinque acuta, superiora magis ovato-elliptica apice acutiora, 

 maxima ad 5:2.2 cm. magna; amenta fructifera pedunculo foHato 

 ad 3 cm. longo excluso ad 5:1.3 cm. magna; fructus e basi rhom- 

 boideo ovoideo-conici, ad 9 mm. longi pedicello ad i . 5 mm. longo 

 glandulam subduplo superante excluso). 



The following specimens seem to me rather intermediate between 

 f. polio phylla and typical var. acutifolia: Great Slave Lake: Fort 

 Resolution, July 14, 1901, E. A. and A. E. Preble (no. 141, fr.; W.; 

 forma minus dense quam no. 139 villosa); June 21, 1903, E. A. 

 Preble (no. 194, f. ; W. ; eadem forma ut videtur ac praecedens sed 

 juvenilis) ; Fort Good Hope, on the Mackenzie River, June 23, 1904, 

 E. A. Preble (nos. 330, f. et fr. anni praeteriti, 332, f. ; W. ; forma a 

 cl. Rydberg ad S. niphocladam relata foliis floribus juvenilibus; sed 

 folia distincte petiolata et fructus adulti magni). There are two 

 other male specimens of E. A. Preble from For-t Resolution, June 



"Review of Canadian Botany" (Trans. Roy. Soc. Can. III. 4:4. 1897), where he 

 expressly states that "with the exception of his immediate predecessors no botanist 

 had accomplished more than Pursh to make the vegetation of Canada known." 

 When James published the manuscript of Pursh's traveling journal he did "not 

 deal with that part of Pursh's work which was continued into and ended in Canada." 

 "He made extensive collections chiefly through the province of Quebec, but all the 

 material thus accumulated was subsequently destroyed by fire." 



Regarding Lord Selkirk, I have been informed by J. C. Nelson that "Lord Sel- 

 kirk's Exp." probably refers to Thomas Dundas, Fifth Earl of Selkirk, who (according 

 to Johnson's N. Univ. Cycl. 4:175. 1878) "spent several of the later years of his life 

 in promoting emigration to the Red River of the North, British America." I have 

 not yet been able to consult the tracts which he has published on emigration to those 

 parts of Canada. 



'"t Derived from iro\i6s, with white hair. 



