MALACEAE 383 



1. M. coronaria (L.) Mill. (M. angastifolia Michx.) In thickets: 



N. J. to 111., Kan., Fla. and La. 



N. J. Found only at Cape May and near Landisville, Atlantic Co. 



2. M. glaucescens Rehder (M. coronaria of Amer. auth., not of 



L.). In thickets: Ont. to Mich, and S. Car. Very rare in 

 our range. 



Known definitely only from Mercer Co. northward in N. J., and 

 from Bucks, Delaware, and Chester counties in Pa. 



3. M. Malus (L.) Britton. In woods and thickets, escaped from 



cultivation: Eastern U. S. 



A common escape in our area, hardly persisting. 



A supposed hybrid between M. Malus and M. baccata has been recorded from 

 Conn, as Pyrus prunifolia Willd. 



Malus baccala (L.) Borck. Britton has been reported from Conn, as an escape. 



4. Aronia Medic. 



Cymes and lower surfaces of the leaves woolly. 



Fruit pyriform, bright red. I. A. arbutifolia. 



Fruit oval or globose, purple-black. 2. A. atropurpurea. 



Cymes and leaves glabrous or nearly so; fruit blackish. 3. A. melanocarpa. 



i. A. arbutifolia (L.) Medic. In swamps and wet woods: Conn. 



to Fla. 



Conn. Not uncommon near the coast southwestward, unknown 

 elsewhere. 



N. Y. Occasional on L. I. and on S. I. 



N. J. Throughout the state, rare in the north, increasing south- 

 ward. 



Pa. Known definitely only from Lehigh, Northampton and Mont- 

 gomery counties. 

 Tertiary, common: Cretaceous, decreasing: Older Formations, 



scattered in N. J. and Conn, and on the glaciated part of S. I. 



189-224 days. About sea level. 



2. A. atropurpurea Britton. Mostly in wet soil: N. S. to Fla. 



Throughout the area, more common southward than elsewhere; 

 perhaps wanting in the pine-barrens. 



3. A. melanocarpa (Willd.) Britton. (A. nigra Britton). In 



swamps or low woods, sometimes in drier situations: N. S. 

 to Ont., Fla. and Mich. 



Common throughout the area. 



