ExTExsioiv OF Raxge OF Pnuxus Umbellata 127 



county. As far as I could learn, it is not distinguislied from the other 

 plums locally, all of them together being known as wild plums. 



So far as I am aware, Prunus umbellata has not been known to 

 occur nearer to us than the coast of South Carolina, and Dr. Charles 

 S. Sargent of the Arnold Arlioretum, probably our leading authority 

 on tlie distribution of trees in the United States, so records it in his 

 manual of the Trees of ISTorth America, published in 1905. In this 

 work he gives the distribution' as follows: Sandy bottom lands and 

 along the borders of the forest of longleaf pine ; South Carolina to 

 Mosquito Inlet, Florida, usually in the neighborhood of the coast, 

 and from Tampa Bay to western Louisiana and southern Arkansas. 



In a letter recently received from Dr. Sargent he says : 



"I do not find in this herbarium any specimen from South Carolina, but it is 

 so common in the coast region of Georgia that I feel quite sure that it grows 

 in South Carolina. I have collected it near Augusta and we have Georgia 

 specimens from Mcintosh County, Milam, Thomasville, Bainbridge, and 

 Albany." 



Dr. Small, in his Flora of the Southeastern United States, gives its 

 distribution as "about river swamps and hammocks, South Carolina, 

 Florida, Louisiana, and Arkansas." Dr. Small distinguishes between 

 this species and Pnm.s injucunda, which occurs in the granite districts 

 of Georgia and Alabama, while Dr. Sargent makes the latter a variety 

 of the former. The difference seems to be largely in the amount of 

 pubescence; iimhelhtla having little or none, while injucunJa has 

 pubescent twigs and tlio under side of the leaves are likewise pube- 

 scent. Trees with smooth thin leaves and others with quite pubescent 

 leaves were found growing fairly close together in the Pee Dee region, 

 and Dr. Sargent says in his letter to me that the species varies very 

 nuu'li ill ])ubescence, there being many spcvimcus in the licrbjirinni 

 of the Arnold Arboretnin wliicli are iiiorc i)ulK'scciir rliaii tliosc I sent 

 him. 



