Bul. 179, U. S. Dept. of Agriculture. PLATE XIl. 
STONES OF THE NATIVE AMERICAN SPECIES OF PRUNUS.—V. 
Fics. 1 to 3.—P. alleghaniensis: 1, From a tree in Huntingdon County, Pa.; 2 and 3, from Birming- 
ham, Pa. Fias. 4 to 6.—P. alleghanicnsis davisii: From a tree in Montmorency County, Mich. 
Fies. 7 to 13.—P. umbellata: 7 and 8, From Eustis, Lake County, Fla.; 9 and 10,from Jackson- 
ville, Fla.; 11, from Athens, Ga.; 12, from Tavares, Lake County, Fla.; 13, from Marshall, Tex. 
Fies. 14 to17.—P. maritima: 14, From a tree in eastern Massachusetts; 15, from Atlantic City, N.J.; 
16, from Cape May County, N. J.; 17, from Bucks County, Pa. Fias. 18 and 19.—P. gravesii: 
From Groton, Conn. Fias. 20 and 21.—P. gracilis: From near Denison, Tex. Fias. 22 to 24.—P. 
venulosa: From near Denison, Tex. FIGs. 25 to 28.—P. besseyi: 25and 26, Cultivated plant, High- 
land Park, Rochester, N. Y.; 27 and 28, wild plant, Custer County, Nebr. Fias. 29 and 30.—P. 
cuneata: From Derry, N.H. Fics. 31 to 34.—P. pumila (wild plants): 31, From Millers, Ind.; 32 
and 33, from Saugatuck, Mich.; 34, from Minnesota. Fias. 35 to 37.—P. pennsylvanica: From 
Saugatuck, Mich. Fics. 38 to 40.—P. emarginata: From Oregon. (Natural size.) 
