FISSION. 61 



also seen it in Plantago hinceolata, Betteda luteolay 

 Campanida viecUum, EptKris impressa, and a bifurcation 

 of the axis of the spikelet within the outer ghimes in 

 Lolium perenne^ and Anthoxanthum odoratum. In the 

 Kew Museum is preserved a cone of Ahws exceha^^ 

 dividing into two divisions, each bearing bracts and 

 scales. A similar thing frequently occurs in the male 

 catkins of Cednm Libani (fig. 25). 



Fig. 25. Bifurcated male inflorescence, Cedrus Libani. 



This subdivision of axial organs is not unfrequently 

 the result of some injury or mutilation, thus Duval 

 Jouve alludes to the frequency with which branched 

 stems are produced in the various species o{ Eqnisetum, 

 as a consequence of injuries to the main stem, but this 

 is rather to be considered as a multiplication of parts 

 than as a subdivision of one. 



Fission of foliar organs. Many leaves exhibit constantly 

 the process of fission, such as the Salisburia adiantifoUay 

 and which is due perhaps as much to the absence or rela- 

 tively small proportion of cellular as compared with 

 vascular tissue, as to absolute fission. In the same way 

 we have laciniated leaves of the Persian lilac, Si/riixja 

 persina^ and Moquin mentions instances in a species of 



' Masters, ' Jourl. Linn. Soc.,' vol. vii, p. 121. 



' Cramer, ' Bildungsabweichungen,' p. 4, tab. vi. fig. 4, figures a cast* 

 of the same kind in Pinus Cenibra. 



