56 JOURNAL OF THE ARNOLD ARBORETl M [vol. vi 



Crataegus 



Pennypackeri Sargent in Hot. Gaz. xxxv. 100 (1903). — Crus-galli. 



Delaware (type locality: Stanton Station), 

 pentandra Sargent in Rhodora, in. 25 (1901). — Tenuifoliae. — Quebec, 



New England, New York (type locality: New Haven, Vt.). 

 pentaneura Ashe in Jour. Elisha Mitchell Sci. Soc. xix. 12 (1903). 



Uniflorae. — New Jersey, North Carolina (type locality not given). 



(?) 

 pentasperma Ashe in Bot. Gaz. xxxv. 436 (1903). — Group? — North 



Carolina (type locality: Franklin). (?) 



peoriensis Sargent in Bot. Gaz. xxxi. 5 (1901). — Crus-galli. — Illinois 



(type locality: Princeville, Peoria County). 



pequotorum Sargent in Rhodora, v. 55 (1903). — Pruinosae. — Connecti- 

 cut (type locality: MumforcPs Point, Groton). 



peramocna Sargent in Ontario Nat. Sci. Bull. iv. 89 (1908). — Macra- 



canthae. — Ontario (type locality: London). 



perampla Sargent in Rep. Geol. Surv. Mich. 1906, 525 (1907). — Prui- 

 nosae. — Michigan (type locality: Port Huron). 



perjucunda Sargent in Ontario Nat. Sci. Bull. iv. 27 (1908). — Pruino- 

 sae. — Ontario, New York (type locality: London, Out.). 



perlacta Sargent in Rep. Geol. Surv. Mich. 1906, 541 (1907).— Tenui- 

 foliae. — Michigan (type locality: Grand Rapids). 



perlevis Ashe in Jour. Elisha Mitchell Sci. Soc. xx. 48 (1904). — Tenui- 

 foliae. — Pennsylvania (type locality: Kutztown). 



permera Sargent in Rep. Missouri Bot. Gard. xix. 65 (1908). — Crus- 

 galli. — Missouri, Arkansas (type locality: Monteer, Mo.). 



perrara Sargent in N. Y. State Mus. Bull, clxvii. 103 (1913). — Coc- 



cineae. — New York (type locality: Chapinville). 



persimilis Sargent in Proc. Rochester Acad. Sci. iv. 94 (1903). — Crus- 

 galli. — New York (type locality: Rochester). 



persistens Sargent, Trees and Shrubs, n. 233 (1913). — Crus-galli. 



Known only in cultivation (type locality: Arnold Arboretum, 

 from seed received from Museum d'Histoire Naturelle, Paris, of 

 unknown origin). 



perspicabilis Sargent in N. Y. State Mus. Bull, clxvii. 90 (1913). — 



Silvicolae. — New York (type locality: Salamanca). 



pertomentosa Ashe in Jour. Elisha Mitchell Sci. Soc. xvi. 70 (1900). — 

 Macracanthae. — Missouri, Kansas (type locality: Johnson County, 



Kan.). 



pexa Beadle in Biltmore Bot. Studies, I. 116 (1902) —Flavae.— North 



Carolina (type locality: Salisbury). 

 Phacnopyrum (L.f.) Medicus, Gesch. Bot. 83 (1793). — Microcarpae. — 



North Carolina, Tennessee, Kentucky, Illinois and Missouri (type 



locality not given). 



