PRINCIPAL SPECIES OF EUCALYPTS GROWN IN AMERICA. 51 



The paragraphs giving the characteristics of the several species dis- 

 cussed were all written or revised under typical trees of the respective 

 species. It is hoped that they are sufficiently accurate and explicit to 

 enable a planter, aided by the illustrations, to decide more or less 

 definitely whether a particular tree in question is what it has been 

 represented to be, or is supposed to be. If there is no clue to the 

 name of a tree, the name of which is desired, it will be necessary to 

 resort to the use of the keys and descriptions given in the botanical 

 section of this bulletin. For this work a good hand lens and some 

 knowledge of botanical terms are essential. 



The climatic requirements of the Eucalypts described here have 

 been determined mainly by personal observation and experiment in 

 the Southwest. In some cases, where the species has been cultivated 

 onh' to a limited extent in America, inferences in regard to the cli- 

 matic requirements of the tree have been drawn from its native, hal)itat. 

 This is not entirely safe; but an attempt has been made to make state- 

 ments based on such data very g-uardedly, as it can not always be 

 prophesied from a knowledge of the native environment of any par- 

 ticulai" species just how it will behave in a foreign countrv. The max- 

 imum temperatures given as the degree of heat a species will endure 

 are those recorded in the shade 5 feet from the ground by a self- 

 recording thermometer. 



The information given concerning the uses of the several species 

 is drawn largely from Baron von Mueller's "■ Eucalyptographia" 

 and "Select Extra-tropical Plants," Mr. Maiden's ""Useful Australian 

 Plants" and "Commercial Timbers of New South Wales,"' and ]\lr. 

 Bailey's "Queensland Woods," since most of the species have not been 

 grown in America long enough nor planted extensively enough to 

 furnish independent data concerning many of the uses of a large num- 

 ber of the species. A notable exception to this is the Blue Gum 

 {Eucalyptus glolndux)^ which has already been used for a great variety 

 of purposes, including wind-breaks, forest cover, shade, fencing, piling, 

 fuel, and oil. A few others have been used for fuel and for timbers. 

 The only useful purposes that many of them have yet served in America 

 are as shade trees, wind-breaks, and bee pasture. 



Eucalyptus amygdalina. 



Giant Kccalyit; Peppkkmint Tkki:. 



Character ktics. — In its native country the individuals of this species 

 are the tallest of the genus, and pro])al)ly the tallest trees in the 

 world. In his "Eucalyptographia." Baron von Mueller says of this 

 species : 



This EuealyptU!:: is uiu; <.A the most iriiuirkable and important of all the phints in 



