70 BULLETIN 179, U. S. DEPARTMENT OF AGRICULTURE. 
Prunus Bessey Hyprips. 
X Prunus utahensis } Dieck., Koehne, 1893, Deut. Dendrol., p. 315. 
Leaves oblong-oval to oval or rarely somewhat lanceolate in out- 
line, slightly conduplicate, 3.5 to 5.5 cm. long, 1.5 to 2.5 em. broad, 
gradually narrowed or sometimes rounded toward the base, acute at 
the apex, the margin crenate, the teeth gland tipped, glabrous on 
both surfaces; petioles 8 to 15 mm. long, pubescent along the upper 
edge or glabrous. Flowers appearing with the leaves, about 12 mm. 
broad; pedicels and calyx glabrous, pedicels about 8 mm. long; — 
calyx tube about 2 mm. long, the oblong-ovate lobes as long as the 
tube, obscurely glandular; ‘petals 6 to 7 mm. long. Fruit about 2.5 
em. in diameter, red, with a hight bloom, poor in quality; stone similar 
in shape to that of Prunus besseyv. 
This hybrid is an irregularly branched shrub 3 feet or more in 
height, showing some of the characters of both of its supposed parents, 
Prunus besseyi and P. angustifolia watsoni. It has also been crossed 
with P. americana. (Pl. XIII, fig. 14, Maryland). 
The variety Montbesseyi 1s supposed to be a hybrid between the 
Montmorency cherry (Prunus cerasus) and P. besseyr. The leaves 
approach the size and form of P. cerasus very closely, but the flowers 
have not been examined. 
In addition to the above hybrids, N. E. Hansen (30, p. 173, 192) has 
described a number of others reported as crosses with Prunus ameri- 
cana, P. simonit, P. cerasifera atropurpurea, P. triflora, P. armenaca, 
and Amygdalus persica. Mr. Hansen writes that the hybrid with the 
last-named species is sterile. 
The earlier hybrids produced do not appear to possess much merit; 
nevertheless, this field must be considered as offering some possibili- 
ties, and crosses between the best forms of Prunus besseyr and the 
variety known as ‘‘Laire,” described under P. orthosepala, might 
afford a better fruit than the Utah hybrid. 
NAMES PUBLISHED IN SYNONOMY OR ACCOMPANIED ONLY BY UNIDENTIFIABLE 
DESCRIPTIONS. 
Prunus acinaria Desf., 1804, Tabl. Ecol. Bot. Mus., p. 179. 
Name given without description, North America. 
Prunus acuminata Hort., K. Koch, 1869, Dendrol., t. 1, p. 101. 
Only incidental mention of horticultural material referred by 
Koch to Prunus americana. = 
Prunus californica Hort. 
Cited by Koehne, 1893, Deuts. Dendrol., p. 312, as a synonym of 
P. acuminata. ‘‘Wildenow (ob auch Michaux?).” The plant de- 
1 For an account of the origin of this form, see Bailey, L. H. (4, p. 262, 265; 5, p. 244, 247). 
