42 BULLETIN 179, U. S. DEPARTMENT OF AGRICULTURE. 
Prunus munsoniana is found (fig. 2) in rather rich soils and ranges 
from central Tennessee and southwestern Kentucky through northern 
Mississippi, northern and central Arkansas, central Missouri, and 
southeastern Kansas to the valley of the Little Wichita River, in 
northern Texas. 
Although Prunus munsoniana is the last species prominent in 
horticulture to receive specific botanical recognition, it embraces 
horticultural varieties among the earliest, if not the earliest, of any — 
American species to be described. It embraces one or more varieties 
that are probably the best known and most widely disseminated 
among those of native origin. There will perhaps be some question 
among horticulturists concerning the reference of the variety Wild 
Goose to this species, but a most critical study of specimens of this 
variety from many localities fails to reveal a single botanical char- 
acter in which it differs from others. The varieties Arkansas, Clifford, 
Mrs. Cleveland, Cooper, Downing, Choptank, Davis, Drouth King, 
Hollister, Hughes, Jewell, Macedonia, Miles, Milton, Newman, 
Nimon, Ohio, Osage, Poole Pride, Pottawattamie, Robinson, Texas 
Belle, Thousand and One, Whitaker, Wild Goose, Wonder, and Wooten, 
all belong to this species. Nearly all of the varieties have until 
recently been referred to Prunus angustifolia, from which the present 
species is distinguished by its more vigorous and hardy character, 
larger and more pointed leaves, larger flowers, and glandular calyx 
lobes. 
PrRuNUS MUNSONIANA HYBRIDS. 
The originators of new varieties have made many hybrids of Prunus 
munsoniana with other species. Crosses are supposed to have been 
made with P. americana, P. angustifolia varians, P. cerasvfera, 
(Pl. XIII, figs. 11 and 12, Marianna), P. hortulana, P. hortulana 
mineri, P. triflora, P. simon [(munsonana xX triflora) x (treflora x 
simon) and with Amygdalus persica. 
Prunus ANGUSTIFOLIA Marsh. 
(Chickasaw plum.) 
Prunus angustifolia Marsh, 1785, Arb. Amer., p. 111. 
Prunus chicasa Michx., 1803, Fl. Bor. Amer., t. 1, p. 284. 
Prunus stenophyllus Raf., 1817, Fl. Ludov., p. 98. 
Cerasus chicasa Ser., 1825, in DC. Prodr., pars. 2, p. 538. 
Prunus chicasa Bena a Roem., 1847, Pane Nat. Sym. Mon. aie 3, p. 58. 
Leaves (Pl. IV, fig. 2) lanceolate or oval-lanceolate, 2 to 5 cm. long, 
1 to 2 cm. broad, usually strongly conduplicate, narrowed or rarely 
rounded toward the base, acute at the apex or obtuse when they first 
unfold, the margin finely glandular serrate, glabrous and lustrous 
