The Flora of the Cayuga Lake Basin 269 



b. Flowers racemose, the peduncles usually leafy. 

 c. Flowers 10-15, in short racemes; sepals oblong, entire, 1.7-2 mm. long; leaf 

 blade small, 3-5 cm. long, suborbicular, apiculate, crenulate. 



10. P. Mahalcb 

 c. Flowers (15) 20-30, in long racemes; sepals smaller and glandular-serrate 

 or nearly obsolete ; leaf blade larger, elliptical or obovate. 

 d. Leaves thin, mostly obovate, sharply serrate ; sepals suborbicular, plainly 

 glandular-serrate; fruit strongly astringent; odor of bark somewhat 

 mephitic. 11. P. virginiana 



d. Leaves thick, waxy, elliptical or lanceolate, crenate-serrate ; sepals almost 

 obsolete, obscurely glandular ; fruit bitter but scarcely astringent ; odor 

 of bark like that of bitter almonds. 12. P. scrotina 



1. P. Persica (L.) Stokes. Peach. 



Cultivated, and occasionally escaping to roadsides. Apr. 20-May 20. 

 Native of Asia. 



2. P. cerasifera Ehrh. Cherry Plum. Myrobalan Plum. 

 Roadsides and thickets ; occasional. Apr. 20-May 15. 

 Slope s. of McKinneys ; near Big Gully ; and elsewhere. 



Native of Eu. In this country escaped from cultivation where it is used as a stock 

 on which other plums are grafted. 



3. P. americana Marsh. (P. americana, second form, of Cayuga Fl.) Wild Plum. 

 Thickets and fence rows where not too dry, and along streams, in clays or alluvium ; 



frequent. May 10-25. 



Newfield ; mouth of Enfield Glen ; Coy Glen ; E. State St. ; Ellis Hollow ; 



Renwick slope ; Shurger Glen ; near Ludlowville ; s. of Union Springs ; and elsewhere. 



Conn, to Mont., southw. to Fla., Tex., and Colo. ; infrequent on the Coastal Plain. 



4. P. nigra Ait. (P. americana, first form, of Cayuga Fl.) Wild Plum. 



In situations similar to the preceding ; somewhat more frequent than P. americana. 

 May 5-20. 



Enfield Glen; near South Hill Marsh; Six Mile Creek, near E. State St.; C. U. 

 campus, near Barnes Hall ; near McGowan Woods ; Renwick slope ; rocky crests of 

 Shurger Glen ; n. of Levanna ; and elsewhere. 



Newf. to Wis. and Alberta, southw. to Conn., and in the mts. to Ga. ; rare or absent 

 on the Coastal Plain. 



5. P. domestica L. Garden Plum. 



Occasionally escaping from cultivation to roadsides. May. 



N. w. of North Spencer; South Hill (D.) ; " Cornell's Woods" (D.) ; near Forest 

 Home ; n. of Cayuga Heights ; s. of McKinneys ; Ledyard ; and elsewhere. 

 Native of Eurasia. 



5a. P. domestica L., var. insititia (L.) Bailey. 



By roadsides ; occasional. May. 



On hill n. of Enfield Falls ; Cayuga Heights ; gully on hill above Portland Point ; 

 forming thickets along shore on Farley Point; and elsewhere. 



Native of Eurasia. 



Bailey (Stand. Cyclop. Hort., vol. 5) says: "When the plum'runs wild, it usually 

 reverts to this form." Hedrick (Plums of Nezv York, p. 35) disagrees with this 

 opinion, and considers P. insititia a valid species. However, the latter plant differs 

 from P. domestica only in the smaller size of leaves, flowers, and fruits, and in its 

 more stunted habit. It should be considered, therefore, a variety rather than a species. 

 P. spinosa of the Cayuga Flora was probably a mistaken identification of this same 

 plant. Dudley's station, however, is now destroyed. 



