546 APPENDIX A. 



putting anomalies out of sight, may be inclined to think that the 

 occurrence of buds where they are avowedly unconnected with 

 nodes, and are axillary to nothing, tells very much against the as- 

 sumption that every bud implies a node and a corresponding foliar 

 organ. And they may also see that the development of these ad- 

 ventitious buds at places where there is excess of nutritive mate- 

 rials, favours the view above set forth. For if a bud thus arises at 

 a place where it is not morphologically accounted for, simply because 

 there happens to be at that place an abundance of. unorganized pro- 

 toplasm ; then, clearly, it is likely that if the mass of protoplasm 

 from which a leaf would usually arise, is greatly increased in mass 

 by excess of nutrition, it may develop into an axis instead of a leaf. 



Many years after this work was published, I discovered among 

 my papers a memorandum which unfortunately I had overlooked, 

 containing further evidence in support of the foregoing conclusion. 

 With the omission of an error concerning the species of plant, I 

 reproduce this memorandum just as it stood : — 



" I found at Dieppe, July 1, 1860, in a garden near the sea a 

 sample of cultivated wild flower (I thought it was grown as an 

 ornamental flower) in which some of the single flowers of the 

 umbel were developed into groups of flowers thus : — 



" In the case where the transformation was fully effected the 

 umbellule had six flowers, answering to the six petals of the 

 original flowers. In other cases the transformation was incom- 

 plete. There were instances where but two of the petals were 

 developed into flowers ; and the other petals remained unchanged. 

 Others in which three were developed ; and others where four 

 were developed. In some cases, too, the development of a petal 

 into a flower was imperfect, in the absence of the flower stalk — 

 the flowers were sessile in the place where the petals would 

 have been. In one case there was an imperfect flower sessile ; 

 another imperfect flower on a short stalk; and three perfect 

 flowers on long stalks. 



