344 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



New Eucalypts. The new eucalypts include the following species: 



E. acervula E. cornuta E. jugalis E. paniculata 



E. acmenioides E. cornuta E. maculata E. polyanthema 



E. Andreana var. Lehmannii E. maculata E. Kisdonii 



E. angulosa E. cosmophylla var. citriodora E. resinifera 



E. botryoides E. decipiens E. megacarpa E. rostrata 



E. calophylla E. dumosa E. microcorys E. Stuartiana 



E. cinerea E. Foeld-Bay E. Muelleriana E. tereticornis 



E. coccifera E. goniocalyx E. obcordata E. urnigera 



Of many of the above-named species little is known, except from 

 meager foreign repots; but the information at hand, viewed in conjunc- 

 tion with their growth so far, indicates that some of them will be of 

 notable value for this State. E. coccifera and E. urnigera are reported as 

 especially hardy. The latter is also rated by Baron von Mueller as the 

 most antiseptic of all the eucalypts, and therefore of especial value for 

 planting in malarial districts. The wood of E. botryoides, E. microcorys, 

 E. Muelleriana, and E. paniculata is said to be very durable underground, 

 and thus excellently adapted for fence posts, railroad ties, etc. 



Experiments on a Large Scale Needed. Tests on a small scale are apt 

 to be misleading, on account of the difficulty of eliminating merely 

 accidental factors. Therefore, it is probable that the average rate of 

 growth of individual species, as well as the relative rate of growth of 

 different species, under certain conditions in California, could only be 

 determined with exactness by the continued observation for a series of 

 years of several hundred trees of each of the species under trial, planted 

 in solid blocks. Experiments on this scale, however desirable, the 

 station has not at present the means of undertaking. A large area of 

 more uniform soil would be necessary for such experiments. 



RECENT ADDITIONS TO THE ARBORETUM. 



New species of trees and shrubs are continually being added to the per- 

 manent collections on the station. Many of these are raised from seed or 

 cuttings in the station nursery; others are obtained from outside sources. 



Pseudotsuga taxifolia, the Douglas spruce, proved a failure on the 

 middle mesa. It needs more moisture, and will be tried again on the 

 creek level. 



OTHER TREES AND SHRUBS. 



Acacia Koa is a beautiful and rare species from the Sandwich Islands. 



Casuarina glauca, from Australia, there called the Desert Sheoak, 

 grows rapidly and endures considerable drought. All the casuarinas 

 are valuable trees for dry localities and barren places. They grow 

 rapidly and furnish excellent firewood. Young trees of C. glauca 

 grown from seed on the station in 1896 and planted out in the spring of 

 1897, when about one foot in height, grew in one year to a height 

 of 5 to 7 feet, and in 1899 were 12 feet high. 



Cytisus scoparius and Genista juncea, natives of Europe, are showy, 

 free-blooming shrubs, well suited to dry situations. The former furnishes 

 a yellow dye, can be used for tanning, and has been highly recom- 

 mended for arresting the drifting of loose sands. 



Ligustrum Japonicum, the Japanese privet, is a useful hedge plant. 



Myoporum laetum, from New Zealand, is an excellent shade tree. It 

 makes a fairly rapid growth, bears exposure well and withstands 

 drought. It grows well on this station and also at Berkeley. 



