NATIVE AMERICAN SPECIES OF PRUNUS. 41 
Prunus Munsoniana Wight and Hedrick. 
Prunus munsoniana Wight and Hedrick, 1911, in Hedrick, Plums of New York, 
. 88. 
Aes hortulana Bailey, in part, 1892, N. Y. Cornell Agr. Exp. Sta. Bul. 38, p. 16. 
Prunus hortulana Waugh, 1899, in Vt. Agr. Exp. Sta. 12th Ann. Rpt., p.195. (Not 
P. hortulana Bailey, 1892, in Gard. and Forest, v. 5, p. 90.) 
Leaves lanceolate to oblong-lanceolate (PI. IV, fig. 1), or sometimes 
broadly oblong-lanceolate, usually 6 to 10 cm. long, 2.5 to 4 cm. 
broad, rounded at the base, acute or occasionally somewhat acumi- 
nate at the apex, the margins rather finely glandular serrate, bright 
ereen and lustrous on the upper surface, the lower surface paler and 
rather sparingly pubescent along the midrib and lateral veins, the 
pubescence often tufted in the axils of the veins, the surface rarely 
pubescent except when young, and even more rarely entirely glabrous; 
petioles slender, 1.5 to 2 cm. long, with a pubescent line along the 
upper side, usually biglandular near the base of the leaf blade; 
stipules linear, glandular serrate. Flowers 12 to 15 mm. in diameter, 
appearing from the last of March before the leaves in the South to 
the last of May and with the leaves in the North (latitude of New 
York), in 2 to 4 flowered, umbellike clusters; pedicels slender, gla- 
brous, 10 to 12 mm. long; calyx tube eae emler a olabrous, ob- 
scurely nerved, about 3 mm. long, the lobes ovate-oblong to oblong 
and obtuse at the apex, as long as the tube, glandular on the margin, 
glabrous or rarely sparingly pubescent on the outer surface, pubescent 
on the inner surface near the base, or the pubescence rarely extending 
above the middle, the margin usually ciliate toward the base; petals 
6 to 7 mm. long, obovate or oblong-obovate, abruptly contracted 
into a short claw, the margin entire or sparingly erose. Fruit globose 
or oval, usually bright red with whitish dots and sometimes yellowish 
markings and a light bloom, ripening in July and August; stone 
oval (Pl. XI, figs. 1 to 16), varying from 9 by 13 mm. in the wild 
state to 12 by 20 mm., or even 14 by 20 mm. in some of the cultivated 
varieties, usually irenents or obliquely truncate at the base, pointed 
at the apex, grooved on the dorsal edge, thick margined and rather 
conspicuously grooved on the ventral, the surface irregularly rough- 
ened, though sometimes rather inconspicuously so. 
The species forms dense thickets in its native habitat with the 
older central specimens sometimes attaining a height of 20 or more 
feet and gradually diminishing in height to the edge of the thicket. 
When budded and grown in the orchard it forms a well-defined trunk 
and attains a height of 25 feet or more. The branches are little or 
not at all spinescent; the bark of the stem in young specimens is 
reddish or chestnut brown and usually rather smooth, becoming 
scaly and losing its reddish color with age; that of the young twigs 
is usually chestnut brown. 
