HARDY WOODY PLANTS 175 



Rhamiius cathnrtica, Common Buckthorn. A hardy and satisfactory shrub 

 for general mass planting. Formerly this species was frequently used for 

 sheared hedges, being especially popular in eastern Massachusetts. It has 

 been tried for hedges on the campus without much success. 



Rhamnus frcuujula, Glossy Buckthorn. More slender and graceful than 

 the common buckthorn and a rather better shrub for general planting. In 

 fact tliis sjiecies seems to be worthy of more attention than is commonly 

 given to it by nurserymen and landscape architects. Very attractive in the 

 autumn because of the abundance of shiny purple-black fruits. 



Rhododendron cataicbiense, Catawba Rhododendron. This handsome ever- 

 green shrub has been growing on the campus for many years and proves to 

 be perfectly hardy. It is represented by a number of flower-color varieties — 

 probably iiybrids. It recpiires an acid soil and is a superb plant for such 

 locations. 



Rhododi'udroii. iiia.vlnium, Roseuay Rhododenduon. A native large ever- 

 green sln-ul). Thougii flo\\ers and flower clusters are not so large and showy 

 as those of R. catawhieiitie. yet it is a handsome plant and worthy a place in 

 any collection. It, too, requires an acid soil. 



Rhododendron micrunthum, Manchurian Rhododendron. Plants of this 

 species have been growing on the campus for several years, but indifferently. 

 They do not appear to be adapted to conditions here. 



Rhus canadensis (aromatica), Fragrant Sujfac. Native shrub less known 

 than some others but very desirable for general planting in parks, public 

 grounds and even in small private gardens; growth somewhat prostrate, four 

 to six feet, good foliage and bright autumn colors; requires no care; has 

 more advantages and fewer disadvantages for garden use than any other 

 member of the genus. 



Rhus copallina, Shining Sumac. Dwarf native shrub, resembling the 

 smooth sumac, but dwarfer with smaller leaves; autumn colors good, es])eci- 

 ally when combined with other sumacs, the shining sumac always being the 

 darkest. Very hard to trans])lant, but otherwise good for landscape effects. 



Rhus cofinus, Co."mmon S.moketree. A large shrub or bushy tree ^ith 

 sho\\y sterile blossoms, used occasionally as an ornamental specimen plant; 

 not especially valuable. 



Rhus cotinus atropurpurea, Purple Sssoketree. A variety of the forego- 

 ing with purplish fluft'y sterile panicles in late summer and autumn, of no 

 special value except as a curiosity. 



Rhus glabra, Sjiooth Sumac. A very common native shrub frequently 

 used in park ])lanting for broad and coarse effects. Especially desirable 

 for its fall colors. Easily transplanted; suckers badly. 



Rhus glabra laclniata, Cuti.eaf SuiAiAC. A variety of the foregoing, with 

 finely dissected foliage; only a curiosity in the same class as the shredded 

 sumac. 



Rhus javanica (osbeckl), Java Su.mac. A fair-sized tree; one specimen on 

 the college grounds grew for several years reaching a height of fifteen feet; 

 flowers showy, appearing late in the season; more effective as a specimen 

 than other sumacs and apparently less inclined to sucker. 



