8 Russell— Comparison of the Structure of Hybrid 



It is here only associated with S. psittacina and 5. purpurea, 

 both of which flower from one to two weeks later. In spite 

 of this there is every likelihood that hybrids will in time be 

 reported, for the flowers of all species last for 14 to 21 days" (17). 



Since the time this was written, the author himself has found 

 S. Drummondii growing with 5. Sledgei, and with them quan- 

 tities of the cross which he has named S. areolata. Macfarlane 

 (26) gives the following note concerning this plant: 



"It is a frequent hybrid wherever both parents are present 

 near each other. It is especially abundant near Mobile, Ala., 

 and westward for thirty miles." 



Natural Distribution of Species and Hybrids Selected 



for Study 



Of the forms to be studied, S. purpurea is the best known 

 and most widely distributed (23). It is found from Labrador 

 through Newfoundland, Quebec, Manitoba, Michigan, Wiscon- 

 sin, and from thence southward to Indiana. Along the coast 

 it extends from New England to Florida in the swampy regions 

 back as far as the Alleghany Mountains. In the south it is 

 plentiful about the Gulf region from Florida to Louisiana. 



5. flava has a more restricted distribution (23). It is more 

 or less abundant from southern Virginia, through North and 

 South Carolina, Georgia, Florida, and eastern Alabama. 



Therefore, the hybrid between these species might be found 

 in the region from North Carolina to eastern Alabama. It is 

 reported from Wilmington, N. C, and Ponce de Leon, Florida. 

 Possibly additional localities may be reported from Georgia (23) 

 and South Carolina. 



S. Drummondii is found only between south central Georgia 

 and western Alabama (23). Since 5. flava is never found west 

 of the Alabama River, the hybrid would not be expected out- 

 side of southern Georgia, Florida, and eastern Alabama. Speci- 

 mens have been gathered in Georgia (Americus), in Florida 

 (Milligan and Crestview), and from Alabama (Bay Minette 

 and Deer Park). 



S. Sledgei, most recently described species, is limited to the 

 region about the Gulf, west of the Alabama River (23). There 

 are specimens preserved from Alabama, Louisiana, and east- 



