680 Mutations 



These narrow lateral lobes heigMen the abnor- 

 mal aspect of the whole spike. 



They are only produced at a somewhat ad- 

 vanced stage of the development of the palet, 

 are united to one another and to the central 

 part by strong veins, which form transversal 

 anastomoses at their insertion. The length of 

 these awns is very variable, and this quality is 

 perhaps the most striking of the whole variety. 

 Often they reach only 1-2 mm., or the major- 

 ity may become longer and attain even 1 cm., 

 while here and there, between them, longer ones 

 are inserted, extending in some instances even 

 as far as 3 cm. from the spike. Their trans- 

 verse position in such cases is strikingly con- 

 trasted with the ordinary erect type of the 

 awns. 



These lateral lobes are to be regarded, from 

 the morphologic point of view, as differentiated 

 parts of the blade of the leaf. Before they are 

 formed, or coincidently with the beginning of 

 their development, the summit of the central 

 lobe becomes hollow, and the development of 

 the supernumerary flower commences. In dif- 

 ferent varieties, and especially in the most re- 

 cent crosses of them, this development is ex- 

 cessively variable. 



The accidental flower arises at some distance 

 beneath the summit of the scale, on its middle 



