73 



Crataegus oxyacantha flexuosa Loud. 



Crataegus oxyacantha stricta Loud. 



Crataegus oxyacantha pendula Loud. 



Crataegus oxyacantha aurea Loud. 



Crataegus oxyacantha variegata (Dipp.) Sudw. 



Crataegus oxyacantha splendens (Koch) Sudw. 



Crataegus oxyacantha eiiocarpa Loud. 



Crataegus oxyacantha oliveriana (Poir.) Loud. 



Crataegus oxyacantha aurantiaca Loud. 



Crataegus oxyacantha leucocarpa Loud. 



Crataegus oxyacantha apetala Loud. 



Crataegus oxyacantha praecox Loud. 



Crataegus oxyacantha multiplex Loud. 



Crataegus oxyacantha rosea Loud, 



Crataegus oxyacantha punicea Loud. 



Crataegus oxyacantha punicea plena Sudw. 



Crataegus oxyacantha semperflorens Dipp. 



Crataegus oxyacantha gratanensis (Boiss.) Sudw. 



Crataegus oxyacantha macrocarpa (Hegetsch.) Sudw. 



Crataegus tomentosa Linn. Pear Haw. 



Range. — FromNew York (Hudson River near Troy) to eastern Pennsylvania (Chest- 

 nut Hill) ; west through central New York to Michigan (as far north as Roscommon 

 County) and Missouri; Allegheny Mountains from northern Georgia to Middle Ten- 

 nessee (near Nashville) ; through Arkansas to eastern Texas (near Dallas). 



Names in use. — Black Thorn (E. I., N. J., Pa., Del., Ga., Fla., La., 

 Miss., Ky., III., Ind., Ohio); Pear Haw (Miss., Ohio); Bed Haw (Miss., 

 Mo.); Pear Thorn (B. I., N. J., Mich.); White Thorn; Thorn (N. Y\, 

 Ky.); Common Thorn (Pa.); Hawthorn; Thorn-apple (111.); Thorn 

 Plum. 



Crataegus punctata Jacq. Dotted Haw. 



Crataegus tomentosa var. punctata Gray. 



Range. — From Quebec (Chateaugay River near Montreal) to Ontario (Detroit 

 River); northern New Hampshire and Vermont and south through southern Michi- 

 gan and western Massachusetts to Middle Tenuessee, and along Appalachian Moun- 

 tains to northern Georgia and Alabama. 



Name in use.— Dotted-fruited Thorn (lit.). 

 Crataegus punctata canescens Britton. White Dotted Haw. 



Range. — Vermont (Ferrisburg). 



VARIETY DISTINGUISHED IN CULTIVATION. 



Crataegus punctata xanthocarpa (Medic.) Lav. Yellowfruit Dotted Haw. 



Crataegus spathulata Michx. Spatulate Haw. 



Range. — Coast region from southern Virginia to northern Florida and west to 

 Arkansas (Hot Springs) and Texas (Colorado River). 



Crataegus cordata (Mill.) Ait. Washington Haw. 



Range. — From Pennsylvania (Lebanon County) and Virginia (upper Potomac 

 River) south in Appalachian foothills region to northern Georgia; west to Middle 

 Tennessee, Kentucky, and southern Illinois (lower Wabash River). 



Names in use. —Washington Thorn (N. J., Pa., Del., N. 0., S. C, 

 111.) 5 Virginia Thorn (Del.); Heart-leaved Thorn (Tenn.); Thorn (Ky.); 

 Red Haw. 



