216 



THE EVOLUTION OP OUR NATIVE FRUITS 



able, and the plant is probably not in cultivation out- 

 side of botanic gardens and experimental grounds 



There is a form of this Pacific plum which produces 

 attractive fruit, however. This is the so-called Sisson 

 plum, bearing the name of Mr. Sisson, of Strawberry 



Fig. :U. Pacific coast plum. (/', 



lata.) Natural size. 



valley, near the base of Mt. Shasta, who has l n 



instrumental in bringing it to notice. This form is 

 known ns Prunus subcordata var. Kelloggii (J. G. Lem- 

 mon, Pittonia, 1890, p. 67). The tree is a taller grower 

 than P. subcordata itself, the leaves less cordate, and 

 the fruit Larger, yellow or red. soft and palatable. 

 Luther Burbank writes me thai the twigs of yellow- 

 fruited plants are greenish yellow, and those of the 

 red-fruited plants are reddish brown. He also tells 

 me thai seeds of the yellow fruits may produce red 



