256 

 Bark 



Lenticels 



Buds 



Leaf scar 

 Leaf 



Flower 



PENNYP ACKER— ON THE BEACH PLUM 



Old stem rather stout, rough, cracked into thin dark gray 

 plates which tend to persist, frequently lichen covered. 

 Young branches smooth, dark purplish brown, numerous 

 light colored lenticels, and numerous spinescent lateral 

 branches. Youngest twigs numerous, elongate and stout, 

 puberulous, epidermis silvery gray rather persistent, when 

 shed uncovers a light reddish brown bark. 

 Numerous, large, very conspicuous, irregularly distributed 

 over the branches, rounded and more elevated on the 

 youngest twigs, darker and flattened on the young branches. 

 Alternate, conical shaped, sharp pointed, brown to gray 

 covered with numerous triangular scales, puberulous along 

 the margins; covered with a silvery gray waxy coating 

 which is shed in early spring. 



Flower buds more precocious in early spring, chestnut 

 brown, rather abundantly scattered along the twigs, 

 frequently compounded with a single leaf bud near the 

 end of the twigs. Leaf buds smaller, more pointed, dark 

 gray and terminal, opening after the bush is in full bloom. 

 Crescent shaped, with three small inconspicuous fibro- 

 vascular bundle scars. 



Ovate, alternate, 6.8 cms. long and 3.4 cms. wide; petiole 

 L2 cms. long and finely pubescent; acute, finely and sharply 

 serrate with small dark brown glandular teeth; rounded 

 and biglandular at the base with two dark brown stalked 

 glands; pubescent along the midrib on the upper surface, 

 along the midrib and in the axils of the primary veins on 

 the lower surface; stipules lobed, glandular-serrate, and 

 early deciduous. At maturity thick and firm, dark green 

 above, paler below. 



Appearing from May 1 to 15 slightly before or with the 

 leaves 15 to 20 mm. broad on pubescent pedicels 15 mm. in 

 length, usually in 3 or 4 flowered umbels, sepals ovate, 

 rounded at the apex, pinkish along the margins, pubescent; 

 calyx tube campanula te 2 mm. deep, glandular on the 

 inner surface, pubescent on the outer; petals white turning 

 pinkish on fading, ovate, rounded at the apex, contracted 

 at the base into short claws; stamens 30, from 8 to 12 mm. 

 long, glabrous turning pink on fading, inserted on the 

 calyx tube; style 20 mm. long glabrous with truncate 

 stigma; carpels simple ellipsoid, glabrous. 



