228 MISC. PUBLICATION 303, U. S. DEPT. OF AGRICULTURE 



Rhododendron viscosum (L.) Torr. Swamp azalea. 



Azalea viscosa L. 



Range: 25, 26, 27, 28, 29, 30. 

 Site: Moist, sun, shade. 

 Fruit: Capsule. 

 A large shrub ; flowers June-July ; stoloniferous forms are often found. 



Rhodora canadensis, see Rhododendron canadense. 

 Rhoeidium cinereum, see Rhus microphylla. 

 Rhoeidium microphyllum, see Rhus microphylla. 

 Rhoeidium potosinum, see Rhus microphylla. 



Rhus spp. 



This genus has been variously divided. One section in particular, (Loladium 

 (Raf.) DC.), has been much separated as Schmaltzia. The group Venenatae 

 Engelm. has been much separated as Toxicodendron. 



Most species grow on neutral soil ; nearly all species are comparatively free 

 from insects and diseases ; propagation is by stem or root cuttings, or by seed 

 sown as soon as ripe or stratified and sown in spring. 



Stomach records (in addition to specific records) : Seventy-one species of birds 

 including ruffed grouse, sharp-tailed grouse, lesser prairie chickens, bobwhite, 

 California quail, plumed quail, wild turkey, and mourning dove; composed 3.17 

 percent of winter food of ruffed grouse in New York, and 3.8 percent of winter 

 food of the same bird for the northeastern United States; opossum. Observa- 

 tions (in addition to specific records) : Thirty-three species of birds, including 

 ruffed grouse. An important food of bobwhite in Oklahoma ; ranks tenth in the 

 list of quail food plants in the Southeast; Mearn's quail; rock squirrel, cedar- 

 belt cottontail ; preferred food of cottontail rabbit. 



Rhus albida, see Rhus olabra. 

 Rhus angustiarum, see Rhus glabra. 

 Rhus arbuscula, see Rhus glalra. 

 Rhus arguta, see Rhus glabra. 



Rhus aromatica Ait. (pis. 32 A, B: 33). Fragrant sumac. 



R. canadensis Marsh., R. crcnata (Mill.) Rybd., R. nortonii (Greene) Rydb., 

 Schmaltzia aromatica Desv., S. arenaria Greene, S. illinoensis Greene. 

 Range : 20, 22, 23, 24, 25, 26, 27, 28, 29. 

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



Fruit : Drupe ; available July-August, persistent the year round. 

 A small to large shrub ; adapted to many kinds of soil including limestone ; 

 thicket forming. 



Stomach records: Western flicker, ruffed grouse. Observations: Preferred 

 food of wild turkey; white-tailed deer. 



Rhus ashei (Small) Greene. 



R. caroliniana Ashe, not Mill., Schmaltzia ashei Small. 

 Range: 28. 



Site : Well-drained, sun. 

 Fruit : Drupe. 

 A small shrub ; commonly occurs in sandy soil. 



Rhus asplenifolia, see Rhus olabra. 

 Rhus canadensis, see Rhus aromatica. 



Rhus choriophylla Woot. and Standl. 

 Range : 11, 14. 



Site : Dry, well-drained, sun. 

 Fruit : Drupe, available through winter. 

 A small to large evergreen shrub. 



Rhus cismontana, see Rhus glabra. 



Rhus copallina L. Dwarf sumac. 



Schmaltzia copallina (L.) Small. 



Range: 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 32. 



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



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





