14 MASS. EXPERIMENT STATION BULLETIN 345 



green leaves and bright-yellow, pea-shaped flowers in June or July. For the 

 border or dry areas on banks or in very large rock gardens. 



Calycanthus fertilis var. nanus DWARF SMOOTH SWEET SHRUB 



A small deciduous shrub for the rock garden. 



Calycanthus florid us CAROLINA ALLSPICE (COMMON SWEET Shrub) 



A large, coarse, leathery-leaved, deciduous shrub formerly much used in 

 American gardens because of its inconspicuous, heavily scented flowers. 

 Many plants so named in cultivation do not have flower fragrance because 

 they are of another species, C. fertilis. There is need for propagators to go 

 back to known true material for the purpose of making fragrant plants avail- 

 able. It does well in full sun or partial shade in rich, moist, but well-drained 

 soil. 



CAMPSis radicans {Bignonia r.) (Tecoma r.) Trtjmpetcreeper 



Normally a coarse, rapid-growing, deciduous vine with ability to climb by 

 stem roots, and bothersome propensity for throwing up unwanted suckers 

 from underground roots. The flowers of the type are orange and scarlet in 

 terminal racemes from July to September. When grown on limited support 

 and kept heavily pruned, it has definite garden value. There are several cul- 

 tivated varieties based on floral color, such as var. atropurpurea (red) and var. 

 flava (yellow); or on growth rate, such as var. speciosa which is smaller than 

 the type. There are also desirable but less hardy hybrids with the Asiatic 

 species, such as c. TagHabuana, "Mme. Galen." Such forms are all easily prop- 

 agated by root cuttings. It does well near the sea and is useful for wild spots 

 or on very extensive supports. 



Candytuft — See Iberis 



Caragana arborescens var. nana DWARF SIBERIAN Pea-Tree 



A stunted, contorted-branched form of a normally large shelter-belt plant 

 for sandy soils. It can be used in the rock garden. 



CARPINUS BETULUS var. FASTIGIATA PYRAMID HORNBEAM 



One of the fastigiate varieties of the European Hornbeam, which in time 

 builds up into a neat column, thus lending itself to the making of tall formal 

 hedges. It is not too top-hardy on high, dry locations. 



CARPINUS CAROLINIANA AMERICAN HORNBEAM 



This native "Blue Beech" with its tough-wooded, fluted, blue-gray trunk 

 and low, spreading head (twenty to thirty feet in height) with stratified branch- 

 ing can serve effectively as a specimen or in wood edges along roadsides. Its 

 foliage, unlike that of the European species, puts on a scarlet or orange autumn 

 show. It is most at home in a cool, moist soil. 



Caryopterls incana COMMON BLUEBEARD 



A "die-back" shrub which in New England seldom gets to more than two 

 feet in height. It is valued for its lavender-blue flowers from August to 

 November, and may best be used in the herbaceous border. The trade now 

 offers this genus in blue, white, and pink forms. 



Cassiope hypnoldes 



A tufted, prostrate, small-leaved, evergreen, alpine shrub for cool, moist 

 soil and partial shade in the rock garden. Rare in cultivation and difficult to 

 grow. 



