Berberis.—Properly the Berberis requires no pruning, but the stronger-growing species, such as B. aristata, B. Lycium, B. virescens, B. vulgaris, &c., require an occasional thinning to keep them within bounds.
Berchemia.—A climbing genus which requires no pruning.
Bruckenthalia.—A dwarf-growing Ericaceous genus, the seed-pods of which should be removed as soon as the flowers are past, or the plants will be seriously weakened.
Bryanthus.—This should be treated the same as the last, which it somewhat resembles.
Buddleia.—Of these, B. variabilis, B. japonica, and B. intermedia flower on the young wood and require cutting back every winter to within two or three eyes of the old wood; B. globosa need not be pruned at all, except in a young state to keep it bushy; and B. paniculata only requires thinning out if it becomes too thick, which is not a very common occurrence.
Calluna (the Ling).—This and its numerous varieties should have the old flowers cut off as soon as they are past, and any long or straggling growth cut back at the same time.
Calophaca.—The solitary representative of this genus is rather inclined to become straggly if growing at all freely. When this is the case, the plant is benefited by the cutting back of the longer shoots in winter.
Calycanthus.—These require an occasional thinning of the branches, and any long shoots may be shortened with advantage.
Camellia.—These, which should be grown outdoors much more than they are, should be cut down if they get unhealthy or unshapely, which should be done in April. Otherwise no pruning is required.
Caragana.—Cut away all the straggling or misplaced branches.