223 



Crataegus aprica. Sun Thorn. 



Location: Fruticetum. 



Natural distribution: Southeastern United States. 

 Crataegus Arnoldiana. Arnold's Thorn. 



Location: Fruticetum. Arboretum. 



Natural distribution : Eastern Massachusetts and Connecticut. 

 Crataegus aspera. Rough-leaved Thorn. 



Location : Fruticetum. 



Natural distribution: Missouri. 

 Crataegus barbara. Slavin's Thorn. 



Location: Fruticetum. 



Natural distribution: New York. 

 Crataegus Barryana. Barry's Thorn. 



Location : Fruticetum. 



r 



Natural distribution : New York. 

 Crataegus Bartramiana. Bartram's Thorn. 



Location: Arboretum. 



Natural distribution: Eastern Pennsylvania. 

 Crataegus Baxteri. Baxter's Thorn. 



Location: Fruticetum. 



Natural distribution : New York. • 

 Crataegus Boyntonii. Boynton's Thorn. 



Location : Fruticetum. 



Natural distribution: Eastern United States. 

 Crataegus Brainerdi. Brainerd's Thorn. 



Location: Fruticetum. 



Natural distribution : Northeastern United States. 

 Crataegus Brainerdi var. Egglestoni. Eggleston's Thorn. 



Location: Fruticetum. 



Natural distribution: Northeastern North America. 

 Crataegus Brittonii. Britton's Thorn. 



Location: Fruticetum. 



Natural distribution: Southern Alleghenies. 

 Crataegus calpodendron. Pear Thorn. 



Location: Fruticetum. 



Natural distribution : Eastern United States. 

 Crataegus champlainensis. Lake Champlain Thorn. 



Location: Fruticetum. 



Natural distribution : Region of St. Lawrence. 



