iqiq] SCHNEIDER— AMERICAN WILLOWS 45 



of the same collection is a female specimen which seems to represent 

 a very small form of S. reticulata somewhat similar to 5. nivalis, but 

 showing a distinct reticulation of the leaves. It needs further 

 observation and has already been mentioned by Rydberg (1899), 

 who also cites a specimen of Macoun (18849, 0-) from Silver City 

 in the Rockies, a locality I have not yet been able to identify. 

 Otherwise it is replaced in the Rockies by S. nivalis and var. 

 saximontana. 



The name 5. orbicularis has been given by Andersson (in DC, 

 Prodr. 16^:300. 1868) to the S. reticulata "in Kamtschatka et in 

 America boreah-occidentali ut ad Sitchka et Unalaschka." Ryd- 

 berg (in Bull. N.Y. Bot. Card. 1:260. 1899) accepted this name 

 for almost all the American material of S. reticulata, citing only 

 three specimens "which may be referred" to Linnaeus' species. 

 But I agree with Coville (in Proc. Wash. Acad. Sci. 3:342. 1901) 

 that the distinguishing characters assigned by Andersson as well 

 as those given by Rydberg are insufficient " to see in our American 

 plant a species distinct from the European." If we wish to dis- 

 tinguish the form with more or less orbicular leaves we may use the 

 name S. reticulata subrotunda Seringe (Essai Mon. Saules Suisse 

 29, 1815) based on S. reticulata Hoffmann (Hist. Salic, i: pi. 2^, 

 fig. J. 1787). Other variations of this species which have been 

 observed in the Old World are not represented among the American 

 material before me and are not mentioned by previous authors. 



2. S. VESTiTA Pursh, Fl. Amer. Sept. 2:610. 1814. — 5. reticu- 

 lata a vestita And. in Ofv. K. Vet. -Acad. Forh. 15:133. 1858, excl. 

 specim. e Siberia et Helvetia. — S. vestita a humilior And. in DC, 

 Prodr. 16^:300. 1868, excl. specim. altaica. — The range of this well 

 known species extends (including the form mentioned later) in the 

 east from northern Labrador southward to western Newfoundland, 

 Anticosti, and the Gaspe Peninsula, and I saw it also from the west 

 shore of Hudson Bay (Churchill, Ig. /. M. Macoun, no. 79143, O., 

 m., f . ; Cor., G.) , while in the west it reaches its northern limit in the 

 Rockies of Alberta and British Columbia toward the 5 2d parallel, 

 extending southward to northwestern Montana and the Wallowa 

 Mountains in eastern Oregon. The western forms have been called 

 5. Fernaldii by Blankinship (in Mont. Agric. Coll. Sci. Stud. 



