226 MISC - PUBLICATION 303, U. S. DEI'T. OF AGRICULTURE 



Rhododendron austrinum (Small) Rchcl. 

 Azalea austrina Small. 

 Range: 30. 



Site: Well-drained, moist, shade. 

 Fruit: Capsule. 

 A large shrub ; flowers April-May ; commonly occurs on sandy soil. 



Rhododendron calendulaceum (Michx.) Torr. Flame azalea. 



Azalea calcndulacea Michx., A, lutea L. 

 Range: 27, 28. 



Site: Well-drained, sun, shade. 

 Fruit: Capsule. 



A small to large shrub ; flowers May-June ; branches erect or spreading ; very 

 ornamental. 



Rhododendron californicum Hook. California rose-bay. 



R. macrophyllum Don. 

 Range: 1, 2. 

 Site: Well-drained, sun. 

 Fruit: Capsule. 



A small to large shrub or rarely a small tree ; evergreen ; flowers May-June ; 

 considered poisonous to sheep. 



Rhododendron canadense (L.) B. S. P. Rhodora. 



R. canadense Torr., R. rhodora Gmel., Rhodora canadensis L. 

 Range: 26, 27. 



Site: Well-drained, moist, sun. 

 Fruit: Capsule. 

 A small, much-branched shrub ; flowers in May. 



Rhododendron canescens (Michx.) Sweet. Hoary azalea. 



Azalea canescens Michx, not Small. 

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

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

 Fruit: Capsule. 



A large sparingly-branched shrub, flowers April-May ; occurs in sandy and 

 other soils. 



Rhododendron carolinianum Relid. Carolina rhododendron. 



Range: 27. 



Site: Well-drained, sun. 

 Fruit : Capsule. 

 A large, much-branched evergreen shrub ; flowers April-May. 



Rhododendron catawbiense Michx. (pi. 31). Catawba rhododendron. 



Range: 27, 28. 



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



Fruit: Capsule. 



A large evergreen shrub ; flowers May-June ; often forms thickets covering 

 extensive tracts of land ; poisonous to livestock either fresh or dry. 



Rhododendron cuthbertii, see Rhododendron minus. 



Rhododendron lapponicum (L.) Wahl. Lapland rose-bay. 



Azalea lapponica L. 

 Range: 26. 



Site: Dry, well-drained, sun. 

 Fruit: Capsule. 

 A small, prostrate evergreen shrub, commonly occurring on alpine summits. 



Rhododendron macrophyllum, see Rhododendron californicum. 



Rhododendron maximum L. Rhododendron. 



Range : 24, 26, 27. 



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

 Fruit: Capsule. 



A large shrub to small tree ; evergreen ; flowers June-July ; thicket forming ; 

 much cultivated. 



Stomach records: Sharp-tailed grouse; white-tailed deer. Observations: 

 Eaten by deer but poisonous to them if taken in large quantities. Poisonous 

 to stock, which avoid it unless very hungry. 



