418 
willows sent to the Watson Club in recent years by various 
contributors. The determinations are by Dr. Rudolf Gorz, 
of Brandenburg, and Herr K. H. Rechinger (filius), and in 
some cases differ from those of British salicologists. They 
regard S. atrocinerea Brotero as distinct from S. cinerea L, 
and consider that in England, as also in the Western half of 
France (cf. Guinier in Bull. Soc. Bot. France, 58, 1911, pp. 
ix-xx), the former is at least in part represented, and takes a 
share in the formation of the viminalis hybrids with the group 
capreae. 
E. F. Linton (Journ. Bot. 1913, Suppl. 33) makes S. 
dasyclados Wimm. synonymous with 5. acuminata Sm. (non 
Mill.) : and (ibid 53) S. atrocinerea Brot. synonymous with 
S. cinerea L. 
Cf. a specimen in Hb. Mus. Brit., Toepffer Sal. Exsicc., 
No. 352, Salix atrocinerea Brot. FI. Bus. I (1804) 31, of the 
male tree ; with several synonyms, and a reference to Guinier. 
(3) 1924. 307, 1. 15, and 1923. 261, 1. 41. 
Salix fragilis x pentandra ? £ [556] Det. E. F. Linton. 
S. alba x pentandra. Det. J. Fraser and W. Watson, and 
Kew. 
S. alba x fragilis x pentandra. K. H. Rechinger, 
R. Gorz. 
Obs. The Rev. E. F. Linton said he would not be sur- 
prised if it contained S. alba as well as S. fragilis. 
(4) 1924. 307, 1. 9. 
S. fragilis L. $ [605]. Agreed, E. F. Linton, J. Fraser. 
.S', alba x fragilis'. K. H. R., S. alba x fragilis f. excelsior 
Host. R. Gorz. 
(5) 1924. 206, 1. 35. and B.E.C.R. 1925. 1063, 1. 14. 
S. fragilis L. [592]. 
S. fragilis X triandra. J. Fraser. 
S. alba x fragilis. K. H. Rechinger. 
S. alba X fragilis f. excelsior. R. Gorz. 
(6) 1921. 180.1.37. 
S', alba var. coerulea (Sm.) B [Ref. No. now added, 524;. 
S. alba x fragilis f. palustris Host. ad. f. medianteni 
Toepf. R. G. 
*Obs . — Nervaturae foliorum grossiores quam in S'. 
alba. R.G. 
