18 Farmers' Bulletin 1208. 



A few eucalypti arc being planted in southern Florida, but on 

 account of the moist climate they are not likely to succeed except 

 on the drier grounds of the interior, and even there they are not 

 equal to the many excellent species that thrive there. They are tall, 

 handsome, quick-growing trees, usually bearing two kinds of leaves 

 at some time in their development. 



The blue gum is one of the best eucalypti and the one most com- 

 monly used in California. It is tall, globular headed, handsome, and 

 will survive several degrees of frost, but it will not withstand the 

 heat of the deserts in region 5. Its roots are especially likely to 

 invade sewers. 



The desert gum is one of the trees most resistant to heat and cold. 

 and it makes a handsome avenue tree. It has pendent branches that 

 have a tendency to severe splitting with age, but with early attention 

 this may be overcome largely. It may prove especially valuable for 

 region 5. 



The manna gum is another Eucalyptus which withstands several 

 degrees of frost and makes an excellent roadside tree. Some forms 

 shed their bark in long bands that leave the trunks almost white. 

 Many people consider it a dirty tree on this account. 



The red gum grows with a broad head, is one of the most resistant 

 of the eucalypti to frost, drought, and heat, and succeeds wherevpr 

 any of these trees can be grown in regions 2, 3, or 5, but is most 

 useful in region 5. 



The sugar gum is a drought-resistant variety, but it does not 

 withstand cold. It is a common roadside tree in southern California, 

 but becomes straggling with age. 



GINKGO. 



The ginkgo, or maidenhair tree (fig. 11, B) , is a native of Japan that 

 thrives in a cool climate or a hot, moist one and succeeds in regions 

 1, 9, 10, 11, 12, and 13. It is extremely erratic, sometimes grow- 

 ing well, sometimes practically not growing at all, but w r here it 

 succeeds it is very disease-resistant and it withstands severe wind- 

 storms remarkably well. The leaf is peculiar in appearance, re- 

 sembling in outline a much enlarged leaflet of maidenhair fern with 

 a corrugated surface. The tree is conical when young, but as it 

 reaches maturity its top usually fills out, making a broad, almost 

 flat-topped, handsome tree. Only the staminate form should be 

 used, because the pistillate form bears fruits the flesh of which is 

 slippery and dangerous when it drops to the pavement, and to 

 some people it is somewhat poisonous to the touch. Ginkgo trees, 

 therefore, would need to be propagated by budding or grafting from 

 the staminate form. 



