338 BOTAIN'ICAL Is'OTES OX QUEEXSLAXD, 



"West Australia to Queensland. Mr. O'Shannessj in his 

 "Contributions to tlie Flora of Queensland " was the first to 

 chronicle the prevalence of this species in the tropics of North- 

 east Australia, and he states, that Mr. Tliozet discovered it on 

 Expedition Eange. Travellers by the Central E-ailway may 

 notice a small patch of this tree in the desert scrub about half- 

 way between the Comet River and Emerald. When once 

 identified the tree can hardly be mistaken for any other. It is 

 of graceful habit, so that its name is really well applied. The 

 white bark, slender stem, widely spreading branches with small 

 narrow leaves, make it always an elegant, but never a large tree. 

 The stem, says Mr. O'Shannessy, is generally fluted so as to 

 resemble the pipes of an organ, and this is a peculiarit}^ that I 

 have noticed as well. The farthest north that I have observed 

 this tree is on the dry sandy scrubs on the Burdekin E/iver, not 

 far from Charters Towers. 



E. macidata, Hook., " Spotted Grum." This tree which is so 

 very common on the east side of the coast range in New South 

 Wales was thought at no very distant date to be almost confined 

 to this colony. But it changes its character, and under another 

 name, E. citrioilora or Lemon Scented Gum extends right up to 

 the waters of Carpentaria. It is always a fine tree and loves the 

 warm sheltered eastern slopes of the ranges. But in tropical 

 Queensland it becomes a very much finer tree. The peculiar 

 spotted appearance of the stem is exchanged for a uniform greyish 

 blue tint. The tree is tall and stately, with a large sound trunk 

 and in fact there are no Eucalypts which can at all compete with 

 it in size except E. raveretiana, and its leaves now send forth a 

 strong perfume which is most grateful at a distance and like 

 roses, but close it is moot powerful and pungent and exactly like 

 essential oil of lemon. This most extraordinary change of 

 characters deserves an attentive study, because it shows that there 

 is scarcely any limit to which variation in these trees may not go. 

 In the " Flora," Dr. Bentham thought that E. citrioilora was 



