282 Eleventh Annual Report 



gland-tipped, yellow-green at maturity, smooth or nearly so when 

 they unfold, becoming smooth both above and below at maturity; 

 flowers appear with the leaves in April or May, in axillary clusters 

 of 2-8, pedicels 1-2 cm. (%-% inch) long in the flowering stage, 

 calyx greenish- white and smooth; fruit ripens in June or July, 

 globose, about 5 mm. (3/16 inch) in diameter, bright red, flesh 

 thin and sour; stone rounded at the base, pointed at the apex, 

 slightly ridged on one edge. 



Distribution. Newfoundland, British Columbia, south to Penn- 

 sylvania, northern Indiana and Illinois, and central Iowa; also on 

 the eastern slopes of the Rocky Mountains, and in the high mount- 

 ains of North Carolina and Tennessee. In Indiana it is found only 

 in the northern part of the State. It is locally more or less frequent 

 on the wooded sand dunes along Lake Michigan. If found in other 

 stations it must be regarded as rare and local. Along Lake Michi- 

 gan it is a small sized tree, usually associated with the common 

 wild cherry, June-berry and black oak. . 



The published records of the distribution are as follows: Dela- 

 ware (Phinney); Delaware, Jay, Randolph and Wayne (Phinney); 

 Kosciusko (Chipman); Lake and Porter (Blatchley). 



Additional records are: Porter (Deam). 



2. Prunus americana Marshall. Wild Plum. Plate 99. Bark 

 on the trunk of old trees dark reddish-brown, separating into thin 

 persisting plates; twigs at first smooth or hairy, light green, be- 

 coming reddish-brown and smooth or some remaining densely hairy 

 until the end of the season; winter buds very small, sharp-pointed, 

 a light or dark brown; leaves oval or slightly obovate, 4-9 cm. (1^-33^ 

 inches) long, rather thin or thick, narrowed or rounded at the base, 

 taper-pointed at the apex, sharply serrated with teeth projecting 

 forward and inward, at maturity smooth and a yellow or dark green 

 above, paler and more or less pubescent beneath especially along the 

 prominent veins; petioles 1-2 cm. (^-^ inch) long, sometimes with 

 1 or 2 glands near the base of the blade; flowers appear in April or 

 May before or with the leaves, white, about 2 cm. (^ inch) across, 2-5 

 in a cluster; calyx lobes lanceolate, entire or more frequently lacer- 

 ated at least near the apex, or only forked at the apex, the lacer- 

 ations ending in callous tips, lobes smooth or pubescent both with- 

 in and without, usually pubescent at least within; fruit ripens in 

 July or September, globular or somewhat oblong, about 2 cm. {% 

 inch) long, red at maturity, flesh yellow and tart; stone about 1.5 

 cm. (J^ inch) long, double convex, oval to nearly orbicular in out- 



