EUCALYPTUS CEEBKA. 



edge ; the fragrance of this supposed variety, which might be called citrata, is so exquisite, that 

 the leaves can be used as a culinary condiment. 



E. crebra might be mistaken for E. largiflorens, not easily in nature, but readily when dried 

 sprigs with imperfect flowers or fruits are to be named ; the latter species recedes by its paler, 

 less farrowed bark, the leaves more conspicuously and darker dotted, the lateral veins less copious, 

 the circumferential vein much more removed from the edge, the anther-cells opening through a 

 pore-like aperture and the lid perhaps generally shorter and blunter. 



In rare instances some of the leaves may widen to a broadish form and become opposite, 

 whereby a transit is established to E. melanophloia (the Silverleaved Ironbark-tree), unless indeed 

 the latter is assumed to be the opposite- and sessile-leaved state of E. crebra, analogous to the 

 position held by E. amygdalina and E. Stuartiana to E. Risdoni and E. cinerea. E. melanophloia 

 again is very closely related to E. pruinosa, though differing already in blackish bark ; from 

 E. crebra it is generally differing irrespective of its foliage in longer lid, in fruits somewhat 

 larger and contracted at the orifice and always in the opposite stalks of the umbels in the panicles. 

 It is traced to New England and the Upper Barcoo. 



E. drepanophylla, which was advanced with much hesitation as a species (flora Australiensis 

 iii. 221), seems mainly to differ in more stunted habit, larger and stiffer leaves of a paler hue, 

 larger flowers and fruits and perhaps different bark. This species or variety, for the elucidation 

 of which farther field-studies are needed, extends northward to the Palmer- River (Th. Gulliver), 

 Cape Sidmouth (C. Moore) and Trinity Bay (Walter Hill) and on the authority of Bentham even 

 to the north-west coast of Australia (Cunningham). 



E. leptophleba has the bark more greyish, less furrowed and rather wrinkled, breaking up 

 into numerous small angular pieces in the manner of E. tesselaris ; hence it belongs to the Rhy- 

 tiphloiae not Schizophloiae ; its flowers remained unknown, but its lid is double in an early state 

 of growth. To E. leptophleba seems also to belong a tree, observed by Mr. P. O'Shanesy on the 

 Comet-River, which sheds the outer layers of its bark from the branches and upper part of the 

 stem ; the persistent portion of the bark resembles that of E. tesselaris, but the leaves are more 

 prominently veined and the fruit is often 5-valved and occasionally even 6-valved. 



E. angustifolia (Woolls, Lectures on the Vegetable Kingdom with special reference to 

 Australia, p. 123) is a form of E. crebra. 



It seems not likely, that E. paniculata will ever be taken for E. crebra, as the leaves of the 

 latter are never much unlike in the color of their two pages, as all the stamens are fertile, the 

 anthers opening in their whole length and the fruits usually smaller and less angular. 



Bentham quotes Metrosideros salicifolia (Solander, in Gsertner de fructibus et seminibus i. 

 171, t. xxxiv. 5.) as belonging to this species ; the rather slender fruit as illustrated renders the 

 identification disputable. Gtertner described the embryo well. The figure a remains still more 

 obscure ; it may belong to E. crebra, E. htemastoma or E. amygdalina. 



Explanation of Analttic Details. — 1, unexpanded flowers of different forms, the lid of one lifted ; 2, longi- 

 tudinal section of an unexpanded flower ; 3 and 4, front- and back-view of an anther with the upper portion of its 

 filament ; 5, style and stigma ; 6, various fruits ; 7 and 8, longitudinal and transverse section of a fruit ; 9, seeds ; 

 10, embryo ; all more or less magnified. 



