NATIVE AMEEICAN SPECIES OF PRUNUS. 68 



somewhat pointed at each end, ridged on the ventral and rounded 

 on the dorsal edge, about 7 mm. long, 5 mm. broad, 



Prunus emarginata is a shrub 3 to 10 feet tail or becoming a small 

 tree in favorable situations, bark of the trunk dark brown, smooth, 

 and rather conspicuously marked with bands of lenticels, grayish 

 brown on the branches and smaller stems, the young twigs usually 

 glabrous, reddish, turning gray at the end of the season. It often 

 foims dense shrubby thickets. 



The species was originally described from specimens collected near 

 Kettle Falls in the Columbia River Valley, northeast Washington, and 

 ranges (fig. 4) from the upper Jocko River, in Montana, through the 

 mountains of Idaho and Washington and from southern British 

 Columbia southward in both the coast and interior mountains of 

 California and western Nevada to the San Bemardmo Mountains, 

 reappearing in the San Jacinto and at South Peak in the Cuyamaca 

 Mountains, in California. It occurs m the San Francisco Mountains, 

 in Arizona, and has been collected as far east as Flagstaff; and speci- 

 mens from the Mogollon and Black Mountains, in southwestern New 

 Mexico, are also referable to this species. It occurs near streams and 

 on moist benches, sometimes in dryish gravelly soils but more often 

 in moist gravelly or more fertile soils. It reaches an elevation of 

 5,000 feet iu the North, in the Sierra Nevada it has been found at 

 8,000 feet, in the San Rafael Mountams at 5,000 feet, in the San 

 Jacinto Mountains at 9,000 feet, and in the San Francisco Mountains 

 at 6,000 feet. 



Prunus emarginuta wSbS originally described as a "low shrub, 4 to 8 

 feet high, with very red wood marked with white spots, and astringent 

 fruit. The leaves are about 2 inches long, quite glabrous, as is the 

 whole plant." The species is quite variable, as is to be expected when 

 the range, covering such varied conditions as are found m the Pacific 

 slope, is taken into consideration. The proposed species here reduced 

 to syiionomy undoubtedly show slight differences from the original, 

 but a study of a large amount of material shows these forms to be con- 

 nected with each other and with the type by innumerable gradations. 

 Cerasus crenulata was described from the Mogollon and Black Moun- 

 tains, N. Mex.; C. arida from "Borders of desert at eastern base of 

 the San Bernardino Mountain," Cal. ; C. jjrunifolia, "8,000 feet io. the 

 mountains of Fresno County, Cal."; 0. rhamnoides, "Mud Springs, 

 Amador County, Cal."; 0. Icelloggiana from mountains east of Chico 

 and from near Quincy, Cal. ; 0. padifolia, foothills at Carson City, Nev. ; 

 6'. oUiqv/i, Oroville, Cal.; 0. jjarvifolia from the vicinity of Mount 

 Shasta, Cal.; and 0. ohtusata from Silvies, in southeastern Oregon. 

 0. glanduloaa was described from Placerville, Cal., and from tho 

 deficription and locality can not bo other than this species. While 

 variablo, a study in the field fails to reveal other than minor varia- 



