























334 



BE. F. BUCHAKAN WHITE S 



to differ from him without good reason, though some of them 

 " could never satisfy " themselves as to the characters of some of 

 the supposed species. 



The accompanying Table (Plate IX.) will show, in a perspi- 

 cuous manner, the very different views, as regards the number of 

 British Willows which have been held at various times. The 

 shaded columns show the quantity of numbered cl species " at 

 each period. The darkest portion indicates the number of true 

 species included in each estimate ; the medium the number of 

 what are now (in this paper) recognized as hybrid forms ; and 

 the lightest the number of supposed species, but which are now 

 considered to be forms only, or, if species, have no claim to be 

 regarded as natives of Britain. 



The periods are as follow : 



1762. Hudson, ' Flora Anglica.' 18 species (10 true, 1 hybrid) 



Hudson's S. reticulata is a form of S. herbacea. 

 1804. Smith, ■ Flora Britannica/ vol. iii. 45 species (16 true 



3 hybrids). 

 1828. Smith, ■ English Flora/ 2nd ed., iv. 64 species (17 true 















6 hybrids). 

 I. W.With 

 Q7 true. 6 



7th ed. 52 species 





1835 



3rd ed. 30 









species (17 true, 5 hybrids). 

 I. W. J. Hooker, ' British I 

 true, 18 hybrids). 



ed. 70 species (17 



1860. Hooker and Arnott, ' British Flora/ 8th ed. 38 species 



(17 true, 6 hybrids). 

 1873. Boswell, « English Botany/ 3rd ed. 34 species (17 true, 



10 hybrids). 

 1881. Babington, ' Manual/ 8th ed. 30 species (J 7 true, 7 



hybrids). 

 1884. J. D. Hooker, ' Student's Flora/ 3rd ed. 18 species 



(16 true, 1 hybrid). — In this work supposed hybrids, 



though mentioned, are not numbered ; and S. cinerea is 



treated as a subspecies. 

 1888. * London Catalogue/ 8th ed. 31 species (17 true, 7 





■ 



hybrids). 



890. As set forth in this paper 

 hybrids). 



t # 



(17 species, 41 









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