740 Ericaceae Gaylussacia 



dune area about Lake Michigan, with the exception of one small colony 

 which I found in dense shade in sandy soil in the Margaret Trasker woods 

 about two and a half miles southeast of Union Mills in La Porte County, 

 where it was associated with black and white oaks. It is local but usually 

 forms large mats when established and not disturbed. 



Newf. to Yukon, southw. to Va., Ind., 111. and in the mts. to Colo, 

 and Calif. 



6215. GAYLUSSACIA HBK. 



Leaves green beneath; filaments of stamens ciliate; fruit black without a bloom, rarely 

 with a slight bloom 1. G. baccata. 



Leaves glaucous beneath; filaments of stamens glabrous; fruit dark blue. (See excluded 

 species no. 486, p. 1079.) G. frond-osa. 



1. Gaylussacia baccata (Wang.) K. Koch. Black Huckleberry. Map 

 1581. Found only in silicious and acid soils. In the northern part of the 

 state it is usually found on wooded slopes with black oak or in black and 

 pin oak woods, and rarely in tamarack bogs. In the "knobs" it is generally 

 associated with chestnut oak and dryland blueberry; and in the "flats" it 

 is found with sweet gum and pin oak. 



Newf. to Man., southw. to Ga., 111., and Wis. 



la. Gaylussacia baccata f. leucocarpa (Porter) Fern. This is a form 

 with white to pinkish fruit. I found a single colony of it on a rocky 

 wooded slope of Bear Creek near Fountain in Fountain County. The 

 fruit was light rose color and about a half larger than that of the typical 

 form. 



6216. VACClNIUM L. Blueberry and Cranberry 



Stems not creeping or trailing; leaves not evergreen (in Indiana) ; corolla 5-toothed or 

 lobed; fruit not red. 

 Corolla open-campanulate, 5-lobed; anthers with long tubes, 2-awned on the back; 

 fruit not edible. 

 Anthers exserted at anthesis; leaves not glossy above, usually glaucous beneath; 

 fruit green, greenish yellow or light purple, usually with a bloom. 



Branchlets and under surface of leaves more or less densely pubescent 



1. V. stamineum. 



Branchlets and under surface of leaves glabrous 



la. V. stamineum var. neglectum. 



Anthers not exserted at anthesis; leaves glossy above, never glaucous beneath; 



fruit black, without a bloom 2. V. arboreum. 



Corolla cylindric, cylindric-ovoid, or urceolate, 5-toothed; anthers awnless, included; 

 fruit edible. 

 Shrubs of a boggy or wet habitat (except 3b), up to 4 m high, usually associated 

 with chokeberry, winterberry, and buttonbush. 

 Branchlets glabrous or pubescent in lines; under surface of leaves glabrous or 

 more or less pubescent along the principal veins until maturity. 

 Margin of leaves entire or slightly erose, rarely a few leaves somewhat 



glandular ciliate-serrulate or glandular bristly-ciliate 



3. V. corymbosum. 



Margin of leaves glandular ciliate-serrulate or glandular bristly-ciliate. 



Blades green on both surfaces 3a. V. corymbosum var. amoenum. 



Blades green above and glaucous beneath. .3b. V. corymbosum var. pallidum. 



Branchlets and under surface of leaves densely pubescent 



3c. V. corymbosum var. atrococcum 



