20 MASS. EXPERIMENT STATION BULLETIN 418 



DESCRIPTIONS OF MALLING CLONAL STOCKS 



A beginner cannot expect to make very great progress in naming an unknown 

 clonal rootstock by reading the following descriptions. The differences are rather 

 small and it is difficult to select easily understood phrases to describe the various 

 rootstocks. Anyone attempting a serious study of them should find these de- 

 scriptions helpful in seeing the identifying characters. He should start by com- 

 paring these descriptions with plants known to be true to name or number. 

 Thus, he may learn what the writer means by the various phrases. It is not very 

 difficult to learn to know these rootstocks if one is willing to observe closely and 

 work hard at the problem. 



Mailing I 



Growth: medium to tall, rather stout, growing tips slightly tinged.* 



Internodes: medium in length. Spurs: none to few. 



Bark: medium brownish olive. 



Lenticels: medium in size and number, round, brownish gray, slightly raised, 

 moderately conspicuous. 



Leaf Blade: medium to large, broad oval to ovate, more or less folded, some- 

 what coarsely waved, rather rugose, bullate, slightly glossy. Base: round to 

 slightly cordate, wide, even. Serrations: quite sharp, moderately deep, quite 

 distinct. 



Petiole: spreading or slightly upright, short, moderately thick. 



Stipules: large. 



Mailing II 



Growth: short to medium, rather stout, growing tips greenish or very slightly 

 tinged. 



Internodes: short. Spurs: medium to many. 



Bark: greenish to brownish olive. 



Lenticels: medium in number, large, round, whitish, slightly raised, con- 

 spicuous. 



Leaf Blade: medium sized, oval, moderately folded, nearly even, rather smooth, 

 dull, somewhat glossy at tip of shoots. Base: round, even, narrow. Serrations: 

 dull, fine, shallow, regular, not distinct. 



Petiole: spreading to slightly upright, short, medium to thick. 



Stipules: small. 



Mailing III 



Growth: moderately tall, rather slender, growing tips greenish or slightly 

 tinged. 



Internodes: short to medium. Spurs: few to medium. 



Bark: dull dark reddish, lighter towards base. 



Lenticels: few, small, round, brownish gray, flush, inconspicuous. 



Leaf Blade: small, oval to ovate with a long distinct tip, flat or sometimes 

 down folded, often reflexed. Base: round, narrow, even. Serrations: sharp, 

 usually deep and distinct. 



Petiole: upright, short to medium, slender. 



Stipules: none or very small. 



*In these descriptions, "tinged" means tinged with red. 



