EUCALYPTUS SETOSA. 



Amongst its own congeners E. setosa must find a systematic place near E. corymbosa, 

 E. terminalis, E. dichromopliloia, E. trachypliloia and tlieir allies, which all exhibit a similar 

 imperfectly defined dehiscence of the calyx. 



Of the technic value of the tree now under consideration nothing is known ; it is probably 

 not of sufScient dimensions to serve for timber, but yields in all probability Kino like several 

 allied species. In organographic respect it is of great interest. In a recently received note 

 Mr. Fitzalan describes the bark as brown or blackish, hard and ridged as in the case of the 

 Ironbark-trees, and he notes, that he found the tree to reach the summits of mountains. The 

 number of stomata seems variable, as in one case they amounted to 149,000 on the lower page of 

 the leaves, but only to 108,000 on their upper side ; such leaves were likely from very young 

 trees or grown under shade. 



In our efforts to introduce or difi^use any Eucalypts into culture on a large scale, we enjoy 

 singular facility, inasmuch as the seeds are so easily gathered and as their transmission on 

 account of their smallness can be so readily effected ; moreover they will maintain their germi- 

 nation-power for some time (several years at least in some cases), provided they are stored in dry 

 and cool places. Indeed it seems marvellous to contemplate, that trees, known to be among the 

 largest of the world, arise from seed-grains so minute. Thus Eucalypts are transferred to distant 

 lands far more easily than Oaks, Walnut-trees, Hickories, Teak, Sal Sissoo and perhaps any other 

 important kind of hardwood-trees, though their constitution limits them mostly to frostless zones 

 and within the tropics to dry or higher mountainous regions, and though their wood cannot 

 always replace that of many other kinds of select timber-trees. A very extensive trade in 

 Eucalyptus-seeds arose already many years ago, to the initiation of which tlie author of this work 

 can lay largely claim. 



Explanation of Analytic Details. — 1, unexpanded flower, the lid lifted ; 2, longitudinal section of an 

 unexpanded flower ; 3 and 4, front- and back -view of anthers ; 5, style and stigma ; 6 and 7, transverse and longi- 

 tudinal section of a fruit ; 8 and 9, fertile and sterile seeds ; 10, portion of a leaf; all magnified, but to various 

 extent. 



