NATIVE WOODY PLANTS OF THE UNITED STATES 205 
A small to large, intricately-branched, dioecious shrub; forms dense thickets ; 
staminate plants much more numerous than pistillate plants in the field; prob- 
ably occurs most commonly on limestone soil. Furnishes a small amount of 
browse for sheep and goats. 
Prunus mitis Beadle. Georgia sloe. 
P. injucunda Small, P. umbellata injucunda (Small) Sarg. 
Range: 28, 29, 30. 
Site: Dry, well-drained, sun. 
Fruit: Drupe, available June-August. 
A large shrub to small tree; occurs in sandy and other soils. 
Prunus mollis, see Prunus emarginata and P. nigra. 
Prunus munsoniana Wight and Hedr. Wild goose plum. 
P. hortulana Bailey in part, P. hortulana Waugh, not Bailey. 
Range: 20, 22, 25, 29. 
Site: Well-drained, moist, sun. 
Fruit: Drupe, available July-September. 
A large shrub to small or large tree; flowers March—May; forms dense 
thickets; about 67 named varieties are known. 
Prunus nana, see Prunus virginiana. 
Prunus nigra Ait. Canada plum. 
P. mollis Torr., P. borealis Poir., P. americana nigra Waugh, Cerasus 
borealis Michx., C. nigra Loisel. 
Range: 21, 23, 24, 26, 27. 
Site: Dry, well-drained, moist, sun, shade. 
Fruit: Drupe, available August—October. 
A large shrub to small tree; flowers in May; forms root sprouts; thicket 
forming; branches often spinescent; may occur on limestone soils; does not 
break or damage in severe snow and storms; about 20 named varieties are 
known. 
Prunus normalis, see Prunus gracilis. 
Prunus palmeri, see Prunus lanata. 
Prunus pennsylvanica L.f. Pin cherry. 
P. perscifolia Desf., P. montana Marsh., P. lanceolata Willd. 
Range: 18, 15, 18, 21, 23, 24, 26, 27. 
Site: Dry, well-drained, sun. 
Fruit: Drupe, available August—October. 
A small to large tree; flowers April-June; root system shallow; rapid grow- 
ing, short-lived; particularly bushy northward; thicket forming; occasionally 
seriously damaged by the cherry-leaf beetle; commonly a shrub on poor soils; 
occurs on many kinds of soil including sand; has been used as grafting stock 
for sour cherry; 8,000 seeds per pound. 
Stomach records: Twenty-three species of birds, including ruffed grouse, 
bobwhite, ptarmigan, sharp-tailed grouse, ring-necked pheasant and greater 
prairie chicken; this and P. serotina composed 2.3 percent of winter food 
of northern sharp-tailed grouse in Quebec and Ontario; composed 0.64 percent 
of fall food of prairie chicken in Wisconsin; Lyster chipmunk, white-tailed 
deer; chipmunk. Observations: Five species of birds; an emergency food of 
prairie sharp-tailed grouse; cottontail rabbit, moose; of importance as food 
for beaver where Populus is lacking. Poisonous to livestock. 
Prunus prunella, see Prunus besseyi. 
Prunus prunifolia, see Prunus emarginata. 
Prunus pumila L. Sand cherry. 
fe ELEC SSG Pursh, P. incana Schwein., Cerasus canadensis Mill. C. glauca 
oench. 
Range: 15, 18, 21, 23, 24, 26, 27, 28. 
Site: Dry, well-drained, moist, sun. 
Fruit: Drupe, available June-August. 
A small shrub; flowers April-May; spreading and creeping; commonly pros- 
trate with growing branches erect; suckers abundantly produced where stems 
touch the ground; occurs commonly in sandy soil; 4,000 seeds per pound. 
; Se Three species of birds; casually browsed by northern white- 
ailed deer, 
