58 JOURNAL OF THE ARNOLD ARBORETUM [vol. vi 



Crataegus 



porracea Ashe in Jour. Elisha Mitchell Sci. Soc. xvn. pt. 2, 19 (1901). 

 Tenuifoliae. — Pennsylvania, New York (type locality: Susque- 

 hanna, Pa.). (?) 



porrecta Ashe in Ann. Carnegie Mus. I. 391 (1902). — Punctatae. 



Pennsylvania (type locality: Pittsburgh). 



Porteri Britton in Bull. N. Y. Bot. Gard. i. 448 (1900).— Pruinosae. 

 Pennsylvania (type locality: Tannersville). 



praeclara Sargent in Ontario Nat. Sci. Bull. iv. 97 (1908). — Macra- 

 canthae. — Ontario (type locality: Toronto). 



praecoqua Sargent in Rhodora, v. 167 (1903). — Rotundifoliae. — Quebec, 

 northern New England and New York, west to Wisconsin and north- 

 ern Illinois (type locality: Crown Point, N. Y.). 



praecox Sargent in Rhodora, ill. 27 (1901) = C. praecoqua Sarg. 



praestans Sargent in Proc. Acad. Nat. Sci. Phila. lxii. 163 (1910).— 



Punctatae. — Pennsylvania (type locality: Nine Mile Run, near 

 Pittsburgh). 



praetermissa Sargent in Rhodora, vn. 213 (1905). — Rotundifoliae. 



Vermont (type locality: Ferrisburg). 



pratensis Sargent in Bot. Gaz. xxxi. 6 (1901). — Punctatae. — Illinois 



(type locality: Wady Petra). 



premora Ashe in Ann. Carnegie Mus. i. 391 (1902) — Intricatae.— 



Pennsylvana (type locality: eastern part of Berks County). 

 Pringlei Sargent in Rhodora, in. 21 (1901). — Coccineae. — Ontario, New 

 England, New York, Wisconsin, northern Illinois and Ohio (type 

 locality: Charlotte, Vt.). 



Pringlei var. exclusa (Sarg.) Eggleston in Rhodora, x. 82 (1908) = C. 

 exclusa. 



Pringlei var. lobulata (Sarg.) Eggleston in Rhodora, x. 82 (1908) = 



C. lobulata. 



prinoides Sargent in Ontario Nat. Sci. Bull. iv. 81 (1908).- — Macra- 



canthae. — Ontario (type locality: Sarnia). 

 prismatica Ashe in Jour. Elisha Mitchell Sci. Soc. XVII. pt. 2, 15 (1901). — 



Group? — North Carolina (type locality: Madison County). (?) 

 priva Ashe in Bull. Charleston Mus. xn. 42 (1916). — Group? — South 



Carolina (type locality: "south end of Piedmont"). (?) 

 procax Ashe in Bull. Charleston Mus. xn. 42 (1916). — Crus-galli. 



South Carolina (type locality not given), 

 procera Sargent, Trees and Shrubs, n. 71 (1908). — Pruinosae. — New 



(typ 



M 



Rotundifoliae. — New York (type locality: Utica). 

 prominens Sargent in Ontario Nat. Sci. Bull. iv. 23 (1908). — Prui- 

 nosae. — Ontario, New York (type locality: Toronto, Ont.). 



