56 MASS. EXPERIMENT STATION BULLETIN 345 



its not unpleasant magenta flowers. So early does it bloom that open flowers 

 are often frozen. 



Rhododendron myrtifolium — See Rhododendron, Alpine Rose Hybrids 



RHODODENDRON OBTUSUM var. KAEMPFERI (Azalea Kaempferi) 



Torch Azalea 

 In New England, a broad, much-branched, deciduous shrub up to six feet 

 or possibly more, which blooms in a glowing mass of vivid carmine-pink, or 

 scarlet-pink, about the end of May. The show of flowers can be protected against 

 too quick fading by planting in a location which is shaded for a part of the day. 

 It is severely injured by winter temperature below 20° below zero.. 



Rhododendron racemosum 



A semi-evergreen, leggy, flopping, small shrub (sometimes up to three feet) 

 suitable for sheltered wall or rock-garden planting. Its flowers, pink to white, 

 resembling those of trailing arbutus, appear towards the end of May. Both 

 Forrest and Rock have collected hardier strains which are beginning to become 

 available. 



RHODODENDRON ROSEUM MAYFLOWER AzALEA (DoWNY PlNXTERBLOOM) 



A multiple-stemmed, bushy, deciduous native shrub some two to eight feet 

 through. Clove-scented, bright pink flowers open with the leaves in May. In 

 cultivation it may be considered as superior to R. nudiflorum because of more 

 showy flowers, extreme hardiness, and indifference as to soil requirements. 



RHODODENDRON SCHLIPPENBACHII Royal Azalea 



An upright-growing, distinctive Azalea with large deciduous leaves in whorls 

 of five; pale to rose-pink, two- to three-inch flowers in small clusters in late 

 May; and foliage yellow to crimson in autumn. It has at times proved difficult 

 in cultivation but is a splendid thing when suited ecologically. 



RHODODENDRON SMIRNOWII SMIRNOW RHODODENDRON 



A woolly-leaved, hardy, evergreen shrub of somewhat less rapid growth rate 

 than R. catawbiense. The felted undersurfaces of the leaves discourage lace 

 bugs. Flowers rose or rosy-purple in June along with those of R. catawbiense. 



RHODODENDRON VASEYI Pinkshell Azalea 



A tall, hardy, upright, deciduous shrub of somewhat irregular branch-habit, 

 with clear rose flowers freely borne before the leaves in May. Foliage takes on 

 a high color in autumn. Rated as one of the finest Azaleas for general natural 

 landscape planting. 



RHODODENDRON YEDOENSE var. POUKHANENSE KOREAN AzALEA 



A reliably hardy, deciduous or semi-evergreen plant which in full sun tends 

 to remain a compact, low shrub, but becomes more straggly in shaded situa- 

 tions. Its profuse, single, lilac-purple flowers of mid-May have distinct 

 garden value if the plants are placed to bloom by themselves. 



rhodotypus scandens (R. kerrioides) Jetbead 



A spreading-branched, somewhat coarse-textured, deciduous shrub with a 

 possible height of some six feet. Single white flowers in May or June, and the 

 following winter-persistent, hard, black fruits, give it claim to garden interest. 

 Beyond that, it has been much used in the past because of its ability to with- 

 stand neglect, and its satisfactory growth in trying situations such as the 

 north sides of buildings, or dry, gravelly banks. 



RHUS CANADENSIS Fragrant Sumac 



A prostrate, deciduous shrub, with occasional upright branches to three 



