Vaccinium Ericaceae 743 



that I place here for want of better determination. I do not believe that 

 these plants belong to Vaccinium corymb osum but are, of themselves, a 

 unit, which may belong to the Vaccinium pallidum of Small's "Flora of the 

 Southeastern United States." Of the Indiana species, they seem to be near- 

 est related to Vaccinium vacillans. There are probably two species or vari- 

 eties in this complex. The leaves are mostly oval or obovate to elliptic, 

 acute, acuminate, or somewhat obtuse, glabrous or more or less pubescent 

 all over, the margins ciliolate-serrulate ; fruit usually black, subglobose, 

 sweet, and one form with glaucous fruit, about 8 mm wide and 9 mm long. 

 It is usually associated with chestnut oak. The specimens in the DePauw 

 University herbarium collected by Grimes on the "Devil's Backbone" in 

 Montgomery County belong here. They were reported as Vaccinium corym- 

 bosum var. amoenum. 



3c. Vaccinium corymbosum var. atrococcum Gray. I have specimens 

 from Lagrange, La Porte, Kosciusko, Starke, and Steuben Counties which 

 I refer to this variety. 



N. B. to Ont., southw. to N. J., Pa., and Ala. 



4. Vaccinium angustifdlium Ait. (Vaccinium pennsylvanicum Lam.) 

 Lowbush Blueberry. Map 1586. Erect or ascending shrubs, usually 10-20 

 inches high. Its preferred habitat is sandy white oak, black and white oak, 

 and pin and black oak woods. It is usually associated with dryland blue- 

 berry. 



Newf. to Sask., southw. to Va., 111., and Wis. 



4a. Vaccinium angustifolium var. nigrum (Wood) Dole. I studied for 

 two successive years, both in flower and in fruit, a large colony of this 

 variety in Starke County, growing in an acre or more of shrubs of the 

 typical species. The following differences were noted. The leaves were 

 more or less glaucous, both on unfolding and at fruiting time ; the corolla 

 was about 0.5 mm wider; and the fruit longer than wide, and black with 

 little or no bloom. I collected this variety also in La Porte County. 



5. Vaccinium vacillans Kalm ex Torrey. Dryland Blueberry. Map 

 1587. Erect, branching shrubs up to 4 feet high, usually 12-20 inches high. 

 This species is restricted to the lake region and to the sandstone and knob- 

 stone area of the southern part of the state. Its preferred habitat is a dry 

 sandy soil and it is rarely found in a moist soil unless it is that of a sandy 

 black and pin oak woods in the lake region. In the southern part of the 

 state it is generally associated with white, black, scarlet, and chestnut 

 oaks, and Virginia pine. 



N. S. to Mich., southw. to Ga., Tenn., and Kans. 



5a. Vaccinium vacillans var. crinitum Fern. (Rhodora 13: 236. 1911.) 

 In this variety the branchlets and under surface of the leaves are generally 

 more or less permanently pubescent. It is much taller and the leaves are 

 larger. I have it from Clark, Floyd, Jackson, Pulaski, St. Joseph, and 

 Washington Counties. I do not know its general range. 



