22 MASS. EXPERIMENT STATION BULLETIN 345 



apples. Though this last group, especially some of the native sorts, are not 

 free from disease, they are in that respect much more satisfactory in cultivation 

 than Hawthorns. Hence, the few species and varieties of Crataegus suggested 

 here. 



CRATAEGUS CRUS-GALLI COCKSPUR ThORN 



An old-time, thorny, hedge plant which, when grown as an individual speci- 

 men, can build up into a tree some thirty feet in height, with late white flowers, 

 glossy foliage turning orange and scarlet in autumn, and persistent red fruits. 



CRATAEGUS NITIDA GLOSSY HAWTHORN 



A tree of some thirty feet with glossy foliage which, after turning orange or 

 scarlet in autumn, drops to leave a show of persistent red fruits. 



CRATAEGUS OXYACANTHA ENGLISH HAWTHORN 



A familiar, dense-headed, spiny-branched plant with small leaves, white 

 flowers, and persistent red fruits. The most common Hawthorn in eastern 

 nurseries, and sometimes offered in double pink-flowering forms as well as the 

 usual double red var. paulii. It is notoriously difficult to transplant in larger 

 sizes. 



Crataegus persistens 



A small tree similar to the Cockspur Thorn, but about one-third as large. 

 Its leaves and red fruits are relatively long persistent. 



CRATAEGUS PHAENOPYRUM (C. cordata) Washington Thorn 



A long-spined, dense-headed, deciduous tree to some thirty feet. This 

 species grows as well as any Thorn and displays clusters of scarlet berries in 

 autumn against orange or scarlet foliage. 



Crowberry — See Corema and Empetrum 

 Cypress — See Chamaecyparis 



Cytlsus Ardoinii 



A procumbent or flopping, somewhat tender Broom which bears golden- 

 yellow flowers in May or June. Adaptable for dry, sheltered positions in the 

 rockery. 



Cytisus decumbens 



A prostrate, sessile-leaved Broom which has bright yellow, pea-shaped 

 flowers in May or June. Where hardy, it will form a mat some eight inches in 

 height. A rockery plant. 



X CYTISUS KEWENSIS 



A procumbent Broom with creamy-white to pale-yellow flowers, which forms 

 mats of about one foot in thickness. A surprisingly hardy rock-garden plant. 



Cytlsus scoparius SCOTCH BROOM 



An upright-branched, slender, green-stemmed, somewhat exotic-appearing 

 deciduous shrub which has become naturalized in coastal areas, often to the 

 detriment of the native flora. Where hardy it shows its yellow, pea-shaped 

 flowers in May, long-persistent foliage, and a distinct winter effect because 

 of its stem coloration. Interest in true conservation will discourage its broad 

 use as a ground-cover plant. Var. Andreanus has yellow flowers with purple 

 wings. 



Daboecia cantabrica IRISH Heath 



A purple-flowered, top-tender, heath-like plant which is suitable for sandy 



