UOTAXICAL SUBJECTS. 



247 



Fig. 93. Sargassum bacciforme, Ag.* 



emergence into an air-life, and withering from seasonal changes, 

 the adnate bud, now axillary and dormant, was left behind, as 

 part of the stem. 



In the " System of Botany " of Le Maout and Decaisne an 

 illustration is given which clearly shows the relationship of the 

 axillary bud and the petiole. The vascular bundle, which feeds 

 the axillary bud, branches off from the petiolar bundle, as shown 

 in Fig. 94 (B). It confirms my idea of the axillary bud having 

 originated in a branch of the petiole. By shortening of the latter 

 it became axillary. Subsequently it adhered to the stem and 

 became part of it, thus releasing itself from dependence on the 

 leaf- branch, as a sub-division of which it had originated. This, in 

 my opinion, is the genesis of the axillary bud in phasnogams. 



In his "Introd. to Crypt. Bot.," Berkeley, at p. 32, in 

 referring to the relation of phaenogams to cryptogams, says : — 

 " The foliaceous expansion is of little consequence. All such 

 productions are mere off-sets from the axis,! whether horizontal or 

 vertical, which are often dispensed with altogether." 



In a note, he continues, " Such expansions may or niav not 

 have vascular tissue. In the former case thev would be mere 



* PI. 109, " Harv. Phyc. Brit." 



f That is, branches or sub-divisious of the stem. 



