PBUNUS NIGRA L89 



than similar varieties in elms, mulberries or haw- 

 thorns, and which m> one associates with specific 

 differences. I am not y.-t prepared to affirm that 

 the wild plum of the North contains but a single 

 Bpecies, but I am convinced that no botanist has yel 

 been able t<> draw designative characters to separate 

 out a Becond or third species. 



The extreme forms of this Americana plum are 

 so well marked, however, that it will be useful, for 

 purpoE study, if incidental names be given them. 



I am, therefore, inclined to follow Waugh* in calling 

 thi- northern type Prunus Americana var. nigra. 



It should be said thai beyond the Mississippi there 

 is a very pubescent -leaved form of Prunus Americana, 

 which is known to botanists as the variety mollis A 

 It i< from this type thai tin- Wolf plum comes. 

 There is also a form of this with flowers as com- 

 pletely double as those of St. Peter's Wreath, or 



•y. A. Waugh, Bull. 53, Vt. Exp. - — 



P. tiraiCAXA, ' ■ . Wii.i. I'i.i m. The type distinguished by 



■• surface ! stone turgid : 

 ;il or slightly obo itly without glands. Tree spreading, 



■ ft. high : ft""' • - pedicels ; leav< •. 



ihining : fruit more «>r l'-^s flattened npon 

 and meaty, the skin tough :>■- . 

 through wild from New Jersey and Now ^ . < r-k , to Mon- 



tana and ' lonthward, h Mexico repn 



mostly by t 



I, Rl d I'i.i -.i I a 



G. ;andl nual). In its extreme forms easily distinguished l>y the 



gland al i 

 broadly obloi . • 



i iai ki •! bj ' 



\ tllln. 



red "ii the : fruit 



• 1 1 « . 1 1 1 > in the 



tThi* it Prunui autlralit n| 



