424 JOURNAL OF FORESTRY 



Eucalyptus sideroxylon A. Cunn. Red Ironbark 



The red ironbark has not. been planted in the San Bernardino Valley 

 except at Del Rosa. With three-year-old trees the entire crown in a 

 few cases was killed, though, as a rule, the injury to the leaves was not 

 extensive. With trees 5 feet and more in height, many of the smaller 

 branches were killed, especially those in the top of the crown. Normal 

 growth as well as sprout developed ; 60 per cent of the latter came from 

 the root collar. Sprouts were well distributed singly on the stem and 

 branches. 



Bucalyptus stuartiana F. v. M. Apple-scented Gum 



Trees of this species were found only at Del Rosa. On the young 

 trees there about half the leaves were killed, while many more had 

 been merely nipped about the edges. On some a few of the smaller 

 twigs were killed, but the spring growth was all normal, no sprouts 

 developing. 



Bucalyptus gunnii Hook. Cider Bucalypt 



The cider eucalypt is represented by 8 three-year-old trees found at 

 Del Rosa, the tallest of which is 9 feet. None of them was injured by 

 the 14-degree temperature of January. Only 5 per cent of the foliage 

 showed the slightest sign of frost damage when examined in March. 

 In the following August one could not tell from their appearance that 

 they had been through a disastrous freeze. 



From this it would appear that the tree is well worth further plant- 

 ing in frosty places in California within the range of the genus. 



Bucalyptus goniocalyx F. v. M. Boxzvood 



The boxwood is represented by two plantations at Del Rosa. In 

 these plantations not a single tree was found killed to the ground by 

 the cold. The damage appeared to be limited to the leaves. Buds were 

 uninjured, and the normal growth commenced about five weeks after 

 the freeze, when adventitious shoots developed. It would appear that 

 the latter form were stimulated by the cold. The cambium was not 

 injured, although the freeze came at a time when it was beginning to 

 function. 



The boxwood produced more sprouts per tree than any other species. 

 Very few of these developed from the root collar or from below the 

 ground, most of them appearing on the stem. From the ground line to 

 the topmost twigs large clusters of sprouts formed (31 sprouts in a 

 single cluster being counted on one tree), and at a distance the planta- 

 tion looked like a clump of bushes. 



