IGl ALTERATION OF POSITION. 



tion of aflveiititious buds, such as liappons in prolifi- 

 cation. Such a partial change from a Horiferous to a 

 foliiferous branch may be seen in a specimen of Sam- 

 hticus nigra in the Smithian herbarium in the Linnean 

 Society, where the ultimate branches of the cyme bear 

 small leaves. My attention was directed to this speci- 

 men by the Rev. W. Newbould. 



Jacquin figures an analogous case in Semperviimm 

 sediforme^ in which the branches of the inflorescence 

 were prolonged into leafy shoots. 



Sometimes from the side of a flower-stalk or scape, 

 which usually does not bear leaves, those organs are 

 produced. The common dandelion, Tara,mnim, some- 

 times offers an illustration of this, and also the daisy 

 (BeUvi).^ In a specimen of fasciated cowslip given me 

 by Mr. Edgeworth there was a similar formation of 

 leaves on the flattened stalk. 



Production of leaves or scales in place of flower-buds. The 

 position of the leaf and of the flower-buds respectively 

 is, in most plants, well defined, but occasionally it 

 happens that the former is formed where, under ordi- 

 nary circumstances, the latter organ should be. This 

 may happen without the formation of any transitional 

 organs between the two, and without actual increase 

 in the number of the buds. Where there is evidently 

 a passage from leaf-bud to flower-bud, or vice versa, 

 the case would be one of metamorphy. If the 

 number of buds be augmented, or they be mixed with 

 the flower-buds, then it would be referable to leafy 

 prolification of the inflorescence. There remains a 

 class of cases wherein there is a complete substitution 

 of one structure for the other, it may be ^vithout the 

 slightest indication of transition between the two, and 

 without any admixture of leaf-buds among flower-buds, 



' ' Misc. Austriac. ad Bot.,* vol. i, p. 133, t. 5. 



- See also Carricrc, ' Revue Horticole,' 1866, p. 442 ; and as to pears. 

 Itadlkofcr in ' Bericht iilxjr die Tliatigkert der Baierischen Gartenbau 

 Gcsellschaft,' 1862, p. 74, t. i. 



