Afo'-c'isjii by Srrds and Buds. Ill 



leaves project to riglit and left, and their side branches 

 are horizontal, making the whole shoot flat with definite 

 dorsal and ventral surfaces. Tlte bush which grows in 

 our garden and bears several branches with similar bud- 

 variations, I owe to the kindness of Messrs. Zocher & 

 Co., nurserymen in Haarlem. The variety can only be 

 propagated by cuttings, as it never flowers,^ and these 

 produce reversions of this kind pretty regularly, both in 

 the nursery of Messrs. Zocher & Co. and elsewhere. It 

 appears to have been first observed in 1863 by Carriere 

 in Paris,- and since that time by many others. This re- 

 markable case is well worthy of a closer study. The 

 perfectly analogous Taxus baccafa fasfigiata never ex- 

 hibits atavism by bud-variations, so far as I know.^ 



The phenomena of bud- variation have hitherto not 

 received from botanists the attention they deserve. In 

 a few cases we know that the phenomenon is preceded by 

 a sectorial segregation, as for instance in striped flowers 

 (§13) and variegated leaves (§ 24) ; but as a rule there 

 is no available information even on this point. Another 

 point which awaits investigation is the nature of the 

 ofl^spring of self-pollinated bud-variants.'^ It seems cer- 

 tain that new types sometimes arise in this way, but much 

 of the proof in favor of this will not bear scrutiny. Under 

 these circumstances it seems desirable to direct more gen- 

 eral attention to this phenomenon' by means of some 



^ Beissner, Handhuch, Joe. cit., p. i8i. 



"Carriere, loc. cit., p. 44, with Figs, i and 2; see also C.vrrtere, 

 Traitc general des Couiferes, p. 717; and James Veitch & Soxs. 

 A Manual of the Coniferae, 1881, p. 308. 



^ See Carriere, loc. cit., and Beissner, Handhuch, loc. cit., p. 169. 



* Tn the okler records attention is seldom paid to polh'nation : 

 sec the hterature in Carriere, loc. cit., p. 59. and Darwix. .Iniinals 

 and Plants, I, 525; II, 442, etc. 



^ Carriere gives a very complete list ; loc. cit., pp. 42-56 : see alsc 



