Heniarks on Ci/tisus Addim. 381 



I am not sure whether I stated, as I should wish to have done, 

 that, in the case which I suppose, of a hybrid bud proceeding 

 from the joint operation of the cellular tissue of two woods 

 brought into intimate union and contact by any sort of grafting, 

 it may naturally be expected that the hybridity should be less 

 indissoluble than in the case of a hybrid produced from cross- 

 bred seed ; because the two sides of the bud may severally have 

 received more of the influence of the wood to which they were 

 most neai'ly approached, while the centre of the bud might per- 

 haps partake more of the joint types. That view of the subject 

 would account for the anomalous habit of this Cytisus, in throw- 

 ing out fertile branches which nearly revert to the respective 

 characters of the two parents, while a portion of the tree con- 

 tinues to be hybrid and sterile. In recommending to gardeners 

 to make experiments with a view to produce such curious arti- 

 ficial results, and to verify my theory, I should wish them to 

 lacerate the edges of the graft or piece inserted by budding, as 

 well as of the stock, so that the cellular tissue of the two plants 

 might become not merely united, but absolutely intermixed and 

 blended together, at the line of union. The wood must be then 

 teased into breaking from that line, by rubbing off all buds that 

 appear elsewhere. Of course it would be advisable to try the 

 experiment first with such plants as break most readily from the 

 hard wood. It appears to me possible that a cross between the 

 olive and privet might be so obtained, which probably could 

 not be effected by a seminal cross ; or of such a sterile plant as 

 the double yellow rose, with some other species or variety. 

 London, May 20. 1840. 



Art. III. Further Remarks on the Cytisus Addrm. By the Hon. 

 and Rev. W. Herbert, D.C L., F.H.S., &c. 



I HAVE received your note, enclosing M. Poiteau's letter with 

 reference to the papers in the Ann. de la Soc. d'Hortic. de Paris, 

 relating to the Cytisus Adamz. I perceive that M. Prevost con- 

 ceives the original shoot of C. Adanu" to have proceeded from a 

 preexisting aberration of C. Zaburnum, which sent an anoma- 

 lous shoot through the graft of C. purpureus, a supposition 

 repugnant to all that we know of the process of vegetation. M. 

 Poiteau having, in 1830 (vol vii. p. 95.), published M. Adam's 

 statement, that the branch issued together with some shoots of 

 C. pui'pureus from the bark of C. purpureus, round a bud in- 

 serted in C. iaburnum, which had perished or remained sulky 

 for a year ; that he had sold the original plant before it had pro- 

 duced flowers, together with others grafted from it; and that it 

 no longer existed in his garden; M. Camuzet (vol. xiii. p. 196.), 

 in 1833, visits the original plant in the garden of M. Adam, at 



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