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. Jwrtulana 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: 13, 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. 



P. depressa Pursh, P. incana Schwein., Cerasus canadensis Mill. C. glauca 

 Moench. 



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. 



Observations: Three species of birds; casually browsed by northern white- 

 tailed deer. 



