C. A. BARBER 57 



ill almost all the plots, thus conveying the suggestion that the formation of 



cane plants from seed is no longer governed by the strict rules applicable to 



seed-bearing plants. In 1917-18 the Khelia plot of seed'ings was thus marked 



out as containing numerous examples of this deformity. The cases thus far 



mentioned do not seem to have their origin in any injury to the cane tissues, 



but, in other cases, the callus results from the hole of a stem borer, the 



breaking of a cane, or the curious " cuts " above the bud in the groove, to 



which attention was drawn in the Journal of Hereditij of February 1916. These 



cuts have been found in many of our seedlings and cane varieties on the farm, 



and appear not to be the result of any insect or other attack, but on differences 



in tension of the superficial layers of the stem. They have been found also 



in seedlings of Saccharum Sfontaneum in some quantity, and various cases have 



been drawn at intervals during the past five years. Some of these may be seen 



oji Plates XII and XIII. A large number of other abnormalities have been 



noted in the seedlings and varieties grown on the station, and the study of 



these would undoubtedly prove of interest from the morphological point of 



view. 



