| Name | Crataegus pruinosa f. angulata (Sargent) E. J. Palmer | 
| Authorship | (Sargent) E. J. Palmer | 
| Rank | Forma | 
| Placed in | Crataegus pruinosa (J. C. Wendland) K. Koch | 
| Citation | 1935 Ann. Missouri Bot. Gard. 22(3): 562 | 
| Holdings | 31 Specimens held in the Harvard University Herbaria identified as Crataegus pruinosa f. angulata (Sargent) E. J. Palmer | 
| Identification made in | [no date] (31) |