PLUM. 199 



ite stock on which to bud varieties of the P. domestica. The 

 De Caradeuc and Mariana plums, which are supposed to have 

 sprung from species native to this country, are probably close- 

 ly related to this species. 



(c) Japan plum group (Prunus triflora). This plum comes 

 to us from Japan, whence it was introduced about thirty years 

 ago. It is probably a native of various parts of Asia and is 

 closely allied to our American plum. The fruit is of large size 

 and brilliantly colored in red, yellow and purple. It does es- 

 pecially well in good plum sections and has a wider range than 

 the Domestica class of plums. Many varieties flower so early 

 in the spring that their crops are uncertain. It seems quite 

 probable that crosses with it and some of the native kinds will 

 give rise to very valuable varieties adapted to a wide range of 

 conditions. Examples of this class are Kelsey, Burbank and 

 Abundance. 



(d) American plum group (Prunus americana). This Is 

 the common wild plum of the Northern states and Canada, ex- 

 tending from the Rocky Mountains eastward across the continent 



and well to the south. It is admirably adapted to the severe 

 conditions of the northern Mississippi Valley and the plains, 

 and from it have come a large number of varieties, including 

 such well known kinds as De Soto, Wyant, Wolf, Weaver and 

 Rollingstone. A form of this, sometimes known botanically as 

 Prunus nigra and having some quite evident characteristics of 

 its own, is found somewhat north of the range of the typical 

 Prunus americana. Good examples of this are the Cheney and 

 Aitkin, both of which flower early and mature their fruit ear- 

 ly. Plums of this class seem to do best in northern Minnesota, 

 northern North Dakota and Manitoba. 



(e) The Wild Goose group (Prunus hortulana), represents 

 a group of plums that seem especially adapted to southern Iowa, 

 Missouri, southern Illinois and adjacent sections. Among these 

 are such well known popular varieties as Wild Goose and Way- 

 land. 



(f) The Chickasaw group (Prunus angustifolia or P. chica- 

 sa) are native to the Southern states and include such varieties 

 as Newman, Pottawatomie and Lone Star. 



