NOTES ON PLUM CULTURE. 
43 
OGON. JAPANESE GROUP. (Primus Americana.) 
Trees of very vigorous growth, but killing back to such 
extent each winter that they have borne no fruit. Young 
twigs light-colored, outer bark on two-year-old wood green¬ 
ish-brown, showing many lenticlesand cracks, on older wood) 
becoming dark colored. Leaves lanceolate, glossy, light- 
green, crenate and glandular-denticulate; stalks short, glan¬ 
dular. Top grafts on native Primus Americana inserted in* 
1894 have fruited for four seasons. Our description of the 
fruit is drawn from specimens produced in 1897. Round- 
oblong, slightly flattened at apex, oblique at stem end, cav¬ 
ity rather shallow; suture inconspicuous; color dull yellow 
with thin whitish bloom; stem short, stout; stone free, oval,, 
sides strongly convex, margin prominent and sharp; flesh 
thick, firm, meaty, of inferior quality. Ripe Augt 14.. 
Plate XII. 
PEFFER’S PREMIUM. (Prunus Americana.) 
Trees planted in 1894 are still quite small, but well form¬ 
ed; young wood glabrous. Leaves medium, broadly-ovate,. 
light green, more or less doubly serrate, the teeth short, 
stalks red, with or without glands. Fruit of medium size,, 
round, rather abruptly flattened at both ends; suture obso¬ 
lete; color deep red on yellow ground, conspicuously marked 
by “leather cracks” about the stem end; bloom thin; flesh 
firm, quality good; stone cling, circular, sides convex, sharp' 
on the margins, smooth. Season medium; ripe Septem¬ 
ber 11. 
PENNOCK’S HYBRID. (Prunus Besseyi X Prunus Americana. )> 
A few years since, in the nursery of Mr. C. E. Pennock, 
of Bellvue, there appeared among a lot of seedlings of 
Prunus Besseyi , one tree that, while bearing the flowers of 
Prunus Besseyi had the habit and foliage of Prunus 
Americana. The fruit borne by this tree is nearly the size 
of wild Prunus Americanahut in color and flavor like Prunus- 
Besseyi. The mixture of characters suggested hybridity and 
led Mr. Pennock to experiment in that direction. Pollen of 
Prunus Americana was successfully used on the stigmas of 
Prunus Besseyi and several hybrids resulted. These all 
resemble the plum in habit, but have the small flowers of the 
cherry. The leaf characters are intermediate, but generally 
most like the male parent. The fruit of most of the trees is 
