50 THE BRITISH WILLOWS 



to chestnut-brown, roundly ovate, densely pubescent, the woolly 

 pubescence + persistent towards the apex. Leaf-blades obovate 

 rounded above often with a subniucronate twisted tip, obscurely 

 crenate and somewhat waved along the margins, very woolly- 

 pubescent above with long silky hairs at first, then glabrescent, 

 densely pubescent beneath at first, partially glabrescent but with 

 long silky hairs persistent on the nerves, reticulate on the under 

 side of the leaves (like S. lanata). 



The above description of foliage is made from the sheet in 

 Herb. Borrer, labelled " Ex hb. J. H. Balfour 5 Salix — , Glen 

 Isla, Aug. 1837." Eemarks are added on a slip — " 5 Why not 

 S. lanata ? W. B." " Probably S. caprea by its stipules, 1847." 

 The stipules are not in evidence now. 



A $ plant of S. caprea x lanata (No. 282), raised in the 

 garden by design, and issued in the Set of British Willows, No. 88, 

 furnishes some more particulars of this new hybrid. Stipules 

 large, rounded or reniform-rounded, often shortly or obliquely 

 pointed. Leaf-blades 1-3 in. long, shortly petioled, lower oval- 

 oblong shortly acuminate, sometimes becoming nearly glabrous, 

 upper broadly oval with short acute often twisted tip, rounded or 

 subcordate at the base, entire or obscurely crenate, rarely a little 

 denticulate, softly pubescent, dull green glabrescent above, grey 

 with pubescence and reticulate- veined beneath. Catkins 1J-2 in. 

 long by 1 in. or more broad, remarkably silky, ovate-oblong; bracts 

 narrowly ovate- to obovate-acuminate, acute, clothed with abun- 

 dant long yellowish- white silky hairs ; stamens ^ in. to nearly 

 J in. long, very numerous, filaments thinly hairy in the lower 

 half; anthers rather small in proportion, tipped with red at first; 

 nectaries shortly oblong. 



x Salix Balfourii (S. caprea x lanata), nov. hybr. Frutex 

 humilis ramulis subcrassis novellis pubescentibus ; laminis ob- 

 ovatis ad apicem rotundatis vel saepe mucronatis, obscure crenatis, 

 supra lanato-villosis demum glabratis, subtus pilis ad nervos reti- 

 culars persistentibus dense vestitis. 



A qua diverse variat No. 282 (arte orta) laminis 1-3 unc. longis 

 ovali-oblongis ovalibusve acuminatis vel acutis glabrescentibus 

 integris vel obscure crenatis ; stipulis foliaceis rotundis saspe 

 oblique acuminatis ; julis $ lf-2 unc. longis, 1 unc. latis, bracteis 

 anguste obovatis-rhombicis acuminatis longe ac dense sericeis ; 

 staminibus J unc. longis, filamentis infra parce pilosis, nectariis 

 longis oblongis. 



Named after J. H. Balfour, formerly Professor of Botany in the 

 University of Edinburgh, from whose herbarium the original 

 specimens came. Found only in Glen Isla, Forfarshire, where 

 also S. lanata occurred. 



Salix caprea x lapponum. 



Syn. S. caprea-lapponum Wimmer, Sal. Eur. 192. — S. Lcesta- 

 cliana Hartman, Skand. Fl. ed. 3, 237. Anderss. DC. Prodr. xvi. 

 (2), 278 (a canescens). — S. caprea x lapponum Seemen, 271. 



Exs. Hb. E. S. Marshall, Nos. 706, 2772. E. F. &W. E. Linton, 

 N«j. 39. 



