NATIVE WOODY PLANTS OF THE UNITED STATES 229 



A small to large shrub or small to large tree; commonly forms thickets; oc- 

 curs in slightly acid soils ; trunks sometimes used for fence posts ; 13,000-70,000 

 seeds per pound. 



Var. lanceolate Gray, (Rhus lanceolata Gray, Schmaltzia lanceolata, Small) 

 occurs in region 11 where it commonly grows on dry, limestone soil. 



Stomach records: Twenty species of birds, including ruffed grouse, bobwhite, 

 sharp-tailed grouse, and lesser prairie chicken. Observations: Ring-necked 

 pheasant ; white-tailed deer. 



Rhus cotinoides, see Cotimts americanua. 

 Rhus crenata, see Rhus aromatica. 

 Rhus crenatifolia, see Rhus trilobata. 

 Rhus desertomm, see Rhus toxicodendron. 



Rhus diversiloba Torr. and Gray. Poison oak. 



R. diversiloba radicans (Torr. and Gray) McNair, R. lobata Hook., Tox- 

 icodendron diversilobum (Torr. and Gray) Greene, T. comarophyllum 

 Greene, T. isophyllum Greene. 

 Range: 1, 2, 3, 4, 5. 

 Site : Dry, well-drained, sun, shade. 



Fruit : Drupe ; available September-October, commonly persistent. 

 A small to large shrub or occasionally a vine ; often forms extensive thickets ; 

 somewhat aggressive ; poisonous. 



Stomach records: Thirty-three species of birds, including California quail. 

 Observations: Three species of birds; of slight importance as browse for mule 

 deer ; black bear. Of importance as a honey plant. Not poisonous to live- 

 stock, fair cattle feed, especially in dry seasons. 



Rhus emoryi, see Rhus trilobata. 

 Rhus cximia, see Rhus toxicodendron. 



Rhus glabra L. (pi. 34, A). Smooth sumac. 



R. albida Greene, R. angustiarum Lunell, R. arbuscula Greene, R. arguta 

 Greene, R. asplenifolia Greene, R. cismontana Greene, R. media Greene, 

 R. nitens Greene, R. occidcntalis (Torr.) Blankenship, R. sambucina 

 Greene, R. sandbergii (Vasey and Holz.) Greene, R. tesselata Greene, 

 Schmaltz-la, glabra (L.) Small. 



Range : 6, 7, 8, 9, 11, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 



29, 30, 31. 



Site: Dry, well-drained, moist, sun. 



Fruit : Drupe ; available September-October persistent the year round. 

 A small to large straggling shrub ; little branched ; commonly thicket form- 

 ing ; grows on coal-stripped land in Illinois ; commonly occurs in slightly acid 

 soil; 27,000-32,000 seeds (with coats) per pound. 



Stomach records: Thirty-two species of birds, including ruffed grouse, bob- 

 white, prairie chicken, mourning dove, and wild turkey. Observations: 

 Seven species of birds including bobwhite, Hungarian partridge, ring-necked 

 pheasant ; a preferred food of wild turkey ; white-tailed deer ; a preferred food 

 of cotton-tail rabbit. 



Rhus hirta, see Rhus typhina. 



Rhus integrifolia (Nutt.) Benth. and Hook. Mahogany sumac. 



Neostyphonia integrifolia Shaf., Styphonia integrifolia Nutt. 

 Range: 5, 10. 



Site : Dry, well-drained, sun. 

 Fruit: Drupe; available August-September. 



A small to large evergreen shrub ; forms remarkably dense thickets ; tolerant 

 of saline conditions ; very drought resistant ; will grow on extremely poor soils 

 including sand and clay ; lower procumbent branches root where they touch the 

 ground ; taproot and secondaries well developed and often extending 10 feet 

 beyond the periphery of aerial portions ; 6,800 seeds per pound. 



Stomach records : Five species of birds ; composed 8.4 percent of food of 84 

 road runners, being found in 31 percent of stomachs examined. Observations: 

 California mule deer. Poor or worthless forage for livestock except occa- 

 sionally goats. 



