102 PROCEEDINGS OF THE ACADEMY OF [Mai'ch, 



been noted in upland peats in the Pennsylvania mountains, and in 

 gravel in the Saucon Valley, eastern Pennsylvania, as well as in Ver- 

 mont. And as indicated by the n in the table, it can be grown 

 under cultivation in soils of as low an acidity as minimacid. 



Eubotrys racemosa (L.) Nuttall. 



Habitat. — Wet sphagnum peat, wet and dry upland peat. 



Acidity. — 



5+ 



4 XXX 



3 . 



2 



1 X 



300 100 30 10 3 1 



The optimum soil reaction of this species is probably subacid, 

 although it is also rather frequent in mediacid soils. The least 

 acid reaction listed was observed in an occurrence in dry upland 

 peat on schistose rocks northwest of Washington, D. C. 



Neopieris mariana (L.) Britton. 



Habitat. — Dry upland peat and occasionally moist peat. 



Acidity. — 



10 3 1 



The optimum soil reaction of this species is probably mediacid. 

 The least acid reaction tabulated was observed in dry sand south 

 of the New Jersey Pine-barrens. 



Xolisma ligustrina (L.) Britton. 



Habitat. — Dry upland peat and wet sphagnum peat. 



Acidity. — 

 5+ 



4 X X ■ 



3 X 



2 

 1 X 



300 100 30 10 3 1 



The optimum soil reaction of this species is probably subacid, 

 although it is also of frequent occurrence in mediacid soils. The 

 least acid value tabulated was noted in dry upland peat on calcar- 

 eous glacial drift near Green Pond, New Jersey. 



Chamaedaphne calyculata (L.) Moench. 



Habitat. — Wet sphagnum peat and occasionally dry upland peat. 



