PRUNING FLOWERING TREES 25 



may be necessary to make well-shaped plants, which 

 should be done after flowering. 



CHIMONANTHUS. The shoots of this should be 

 shortened back after flowering, and if on a wall they 

 should be spurred in. 



CHIONANTHUS. See CERCIS. 



CHOISYA TERNATA. This only needs thinning after 

 the flowers are over and old wood removed. 



CISTUS. Those which are hardy of this genus 

 should be cut back each spring while in a young 

 state, but when they have attained a flowering size no 

 pruning is required. The cutting back of young 

 plants induces a bushy habit, and also keeps 

 them from weakening themselves by blooming and 

 seeding. 



CLEMATIS. The garden forms of this genus are 

 divided into two sections, of which C. Jackmani, 

 C. lanuginosa, C. Viticella, and C. aromatica (C. coerulea 

 odorata) are the types of those which flower on the 

 young wood, and which require cutting back close 

 to the old wood in the winter ; while C. florida, 

 C. patens, and C. montana are the types of those 

 which flower on the ripened wood of the previous 

 year, and merely require a thinning out of weakly or 

 unnecessary growth. Of species other than those 

 mentioned above, C. Flammula, C. paniculata, and 

 C. Vitalba flower on the young wood ; and the re- 

 maining species are either herbaceous or flower on 

 the old wood. 



CLERODENDRON TRICHOTOMUM. Thin in spring. 



CLETHRA. These practically require no pruning, 



