NATIVE WOODY PLANTS OF THE UNITED STATES 227 



Rhododendron minus Michx. Piedmont rhododendron. 



R. cuthbertii Small., R. punctatum Ander. 

 Range: 28, 29. 



Site: Well-drained, sun, shade. 

 Fruit : Capsule. 

 A small to large, straggling evergreen shrub ; commonly occurs on sandy soil. 



Rhododendron nudiflorum (L.) Torr. Pinxter flower. 



Azalea nudifiora L. 



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

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

 Fruit : Capsule. 

 A small to large shrub; flowers April-May; commonly occurs in sandy soil. 



Rhododendron oblongifolium (Small) Mill. 



Azalea oblonyifolia Small. 

 Range: 25,29. 



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

 Fruit: Capsule. 

 A small to large shrub ; commonly occurs in sand or limestone soils. 



Rhododendron occidentale (Torr. and Gray) Gray. Western azalea. 



Azalea occidentalis Torr. and Gray, A. califomica Torr. and Gray. 

 Range: 4. 



Site: Well-drained, moist, sun, shade. 

 Fruit : Capsule. 



A large shrub ; flowers June-July ; rarely occurs in sunny positions. 

 Observations: Much used by mountain beaver. An important livestock-poison- 

 ing plant. 



Rhododendron prinophyllum, see Rhododendron roseum. 



Rhododendron prunifolium (Small) Mill. 

 Azalea prunifolia Small. 

 Range: 29. 



Site: Well-drained, moist, shade. 

 Fruit: Capsule. 

 A large shrub. 



Rhododendron punctatum, see Rhododendron minus. 

 Rhododendron rhodora, see Rhododendron canadense. 



Rhododendron roseum (Loisel.) Rehd. 



R. prinophyllum (Small) Mill., Azalea rosea Loisel., A. prinophylla Small, 

 A. canescens Porter, not Torr., and of Small, not Michx. 

 Range : 25, 27, 28, 29. 

 Site: Dry, well-drained, sun. 

 Fruit: Capsule. 



A large shrub; often dominant and thicket forming in old clearings; very 

 ornamental. 



Rhododendron serrulatum (Small) Mill. 

 Azalea serrulata Small. 

 Range: 30. 



Site : Moist, well-drained, sun. 

 Fruit: Capsule. 

 A large shrub. 



Rhododendron speciosum (Willd.) Sweet. 

 Azalea speciosa Willd. 

 Range: 27,28,29. 

 Site : Well-drained, sun. 

 Fruit: Capsule. 



A small to large shrub ; flowers April-May ; thicket forming ; commonly occurs 

 on sandy soil. 



Rhododendron vaseyi Gray. Pinkshell azalea. 



Azalea vaseyi (Gray) Rehd., Biltia vaseyi (Gray) Small. 

 Range: 27. 



Site: Well-drained, moist, sun, shade. 

 Fruit: Capsule. 

 A small to large shrub ; occurs in sandy and other soils ; in cultivation. 



