1910] Hall: Studies in Ornamental Trees and Shrubs. 23 



in which the protruding stamens correspond to the bristles of 

 a brush the handle of which is represented by the woody stem. 

 "Chimney-sweep" is another suggestive appellation sometimes 

 used. 



Callistemons are favorites in California gardens and deserve 

 to be even better known. They are perfectly hardy with us, 

 endure considerable drought, and take kindly to pruning. In 

 fact, severe autumn pruning is essential if masses, of winter 

 and spring bloom are desired. By this means the shrubs may 

 be kept down to almost any desired size, while with but little 

 pruning they may be allowed to occupy large corners or used 

 as border shrubs for wide driveways. They are especially rec- 

 ommended for parks, depot- grounds, schoolyards, cemeteries, 

 and for large private grounds ; also, for smaller yards, if used 

 in moderation and kept well pruned. C. Irackyandrus differs 

 from the other species in being suitable for small grounds and 

 is one of the very good shrubs that is little known. It is espe- 

 cially serviceable in adding grace and airiness to an otherwise 

 somber yard. 



The propagation of Bottle-brushes is not difficult. Seed is 

 formed in abundance and although only a small percentage may 

 be fertile there is seldom difficulty in getting a good stand. 

 But seedlings are slow in reaching the flowering stage and be- 

 cause of this cuttings are commonly used. These should be 

 taken in spring from ripened wood or at least from wood which 

 is getting firm at the base. Three or four inches is about the 

 proper length and propagation is best affected in sand under 

 glass. 



The identification of our garden forms is no easy task, since 

 there are several apparent hybrids to be taken into account, as 

 well as numerous cultivated forms. It is also to be remembered 

 that among nurserymen this genus is occasionally united with 

 Metrosideros, a union which the botanist cannot countenance. 

 Since, however, the species names under Metrosideros are but 

 seldom correctly applied, it would be as well for all interested 

 to familiarize themselves with the proper names under Calli- 

 stemon. 



