1920] SCHNEIDER, NOTES ON AMERICAN WILLOWS- VII 153 



Berlin, and therefore this Willow must have been distributed under the 

 name S. Walpolei long ago. I am sorry that neither Coville nor Ball pub- 

 lished this name, and in spite of several requests I have not obtained per- 

 mission to deal with this form in my present note. I can only say that I 

 have seen the material preserved in the National Herbarium, and that it 

 seems to me that this form is very closely related to S. Barclayi and may 

 represent nothing but a variety of it, which occurs farther north than the 

 type on Seward Peninsula. 



Still another form closely related to S. Barclayi has been collected by 

 Miss A. Eastwood in the Yukon Territory and near Lake Atlin in northern 

 British Columbia. In a field note the collector says of it: " This is related 

 to S. Barclayi but differs in the catkins being borne on the old wood. It 

 seems to be confined to the Yukon. It is a very beautiful shrub with its 

 young leaves red, and broad smooth leaves. There was only one bush in 

 Dawson that bore flowers and that was female. I did not discover it while 

 in flower as the bush resembled S. arbusculoides and the flowers came out 

 before the leaves." This form looks indeed like a distinct species, but the 

 name prunifolia provisionally chosen by Miss Eastwood cannot be used 

 because this name was applied long ago by Smith, Seringe, Host and others 

 to different plants. I do not wish to propose a new name at present, since 

 I think it best to wait for more material and a better understanding of this 

 peculiar plant. It may, however, be said, that it seems to differ from S. 

 Barclayi chiefly in the following characters: ramulis ab initio glabris, foliis 

 novellis rubescentibus, tantum superne pilis villosis deciduis praeditis, 

 adultis tenuioribus magis crenato-serratis, amentis ut in S. monticola 

 praecocibus, sessilibus subsessilibusve, bracteis obtusioribus, anther is ut 

 videtur violaceis, fructibus minoribus (? tantum 5-6 mm. longis). I am 

 not sure of the constancy of these characters, the fruits of the Atlin speci- 

 mens are partly up to 8 mm. in length and hardly distinguishable from 

 those of typical S. Barclayi. In its glabrousness and in the sessile aments 

 this new form points toward S. monticola (see later) the leaves of which usu- 

 ally seem to possess numerous stomata in their upper surface while I have 

 not observed any in the upper epidermis of the leaves of the Yukon plant. 

 The following specimens have been examined. 



Yukon Territory, Dawson, near corner of big fence, June 9, 1914, A. East- 

 wood (No. 173, f.; A.; this number should be regarded as the type); July 4, 1914, 

 same coll. (No. 508, st.,same plant according to the collector), June 14, 1914, same 

 coll. (No. 230, f.; A.; young leaves purplish); June 9, 1914, same coll, (No. 166, st.; 

 "small bush near my cabin," like 230); Ogilvie, July 8, 1914, same coll. (No. 541, 

 fr.; A.; amentis ad 6 cm. longis, partim pedunculatis, fructibus ad 8 mm. longis; 

 this resembles S. Barclayiy but is entirely glabrous, the leaves are large, ovate- 

 elliptical and measure up to 8:3.1 cm.); Coffee Creek, July 10, 1914, same coll. (No. 

 552 a. m., 553, m., A.); Hardcreek Slough, July 11, 1914, same coll. (No. 581, fr., 

 A.; amentis 4.5:1.3 cm. magnis, fructibus tantum 5 mm. longis pedicello 1.8 mm. 

 longo excluso); Yukon River above Rink Rapids, river flat, July 9, 1902, J. If a- 

 coun (No. 54405 a, O., St.). 



British Columbia. Lake Atlin, July 14, 1914, A. Eastwood (No. 635, fr.; A.; 

 fructibus maturis circ. 6 mm. longis. basi ovoidcis, forma S. monticolae satis similis) ; 



