108 PROCEEDINGS OF THE ACADEMY OF [March, 



Vaccinium erythrocarpum Michaux. 



Habitat. — Moist and dry upland peat. 



This species has been observed only in the mountains in Pendle- 

 ton County, West Virginia. The soil acidity was found to be medi- 

 acid in most cases, occasionally ranging to subacid. 



Vaccinium oxycoccos L. 



Habitat. — Wet sphagnum peat. 



In addition to occurrences in New England, this species has been 

 observed only in a swamp in eastern Lycoming County, Pa.; in 

 all cases the soil is mediacid. 



Vaccinium macrocarpon Alton. 



Habitat. — Wet sphagnum peat. 



This species has been observed in swamps in many places in New 

 Jersey and Pennsylvania, the soil acidity being mediacid, or rarely 

 subacid. 



Pyxidanthera barbulata Michaux. 



Habitat. — Dry and occasionally moist upland peat. 



This species has been observed at many places in the New Jersey 

 Pine Barrens, in mediacid and rarely subacid upland peat and white 

 sand, the acidity of the latter being due to the development of auto- 

 genous humus beneath the mats of the plant. 



Galax aphylla L. 



Habitat.- — ^Dry upland peat. 



This plant has been observed in the mountains of southwestern 

 Virginia, growing in open woods, with Epigaea and various Vac- 

 cinium, in mediacid or less commonly subacid soils. 



Corema conradii Toney. 



Habitat. — Dry upland peat. 



Included here in view of the opinion of some botanists that this 

 family probably represents a degenerate member of the Ericales. 

 This species has been observed only in the Plains, east of Chats- 

 worth, in the heart of the New Jersey Pine-barrens. It grows in 

 white sand, mingled with autogenous humus, the reaction being 

 mediacid. 



By tabulating the data, the relative acidity requirements of the 

 various species may be made clearly evident. Bold face X's mark 

 optimum values, ordinary-face capitals frequently observed values, 

 small x's occasional ones, o's observations in other regions, and n's 

 tests in nurseries. 



