EUCALYPTUS COEYMBOSA, 



embarrassment has arisen in specifying the limits, by which E. terminalis (E. pyrophora, Bentham, 

 flora Australiensis iii. 257) may constantly be separated ; thus Bentham already was inclined to 

 consider both as forms only of E. corymbosa, a view which the accumulation of much additional 

 material has almost confirmed. In the wide tracts of intratropical Australia E. terminalis with 

 its varieties occurs even far inland, thus at the Barcoo (Dr. Wuth) and at Lady Charlotte's Water 

 (E. Giles) in such hot and arid regions, as are climatically vastly different from the cool forest- 

 ravines of the south-east coast ; hence gradually the leaves become paler, nearly or fully as much 

 on the iipper surface as beneath, their position gets more vertical and therewith stomata occur also 

 on the upper page, the panicles also assume often a paler hue, the flowers and fruits generally are 

 smaller, the latter become less woody and somewhat more slender, and often lose the outward 

 curvature towards the rim ; but the fertile seeds of E. terminalis are as a rule provided with a 

 terminal membranous app)endage of about the length of the kernel, a characteristic hardly ever 

 occurring in the typical E. corymbosa. An extraordinary variability is also evinced by E. termi- 

 nalis as regards not only the size of its calyx, but also the manner of its dehiscence, a regular 

 sutural line being sometimes not traceable, necessitating an irregular defraction of the opercular 

 summit ; the lid moreover verges sometimes to a flattened form with an almost obliterated apex, 

 or the lid may be quite turgid and its apex very prominent. 



E. dichromophloia has the fruits considerably smaller, about the size of those of E. trachy- 

 phloia and E. latifolia, besides the bark seems always different, as the specific name implies, from 

 that of E. corymbosa and E. terminalis, its upper thin smooth and pale stratum separating from 

 the brownish-red thick layers below. E. latifolia has very broad even roundish leaves, and belongs 

 on account of its smooth bark to the section Leiophloiee, unless this be subject to exceptions. 

 E. Abergiana can be separated from E. calophylla and E. terminalis by the want of stalklets of its 

 calyces and from the latter besides by the broader and above dark-green leaves. E. calophylla 

 may be said to replace E. corymbosa in West-Australia, though E. terminalis advances to Nichol- 

 Bay on the west-coast and perhaps still further southward. E. calophylla is however siDecifically 

 different in several important respects. {See F. v. M., report on the Forest-resources of Western 

 Australia p. 4, pi. 2.) The young seedlings of all allied species require yet further com23arison. 



E. urnigera, which bears in its fruit considerable resemblance to E. corymbosa, differs 

 essentially in having the leaves dark-green and somewhat shining on both sides, the latter 

 moreover are provided with less spreading rather irregular and more distant lateral veins, a 

 removed marginal vein and isogenous stomata, many of the flowerstalks are axillary and bear 

 mostly 3 or occasionally only 2 flowers, the tube of the calyx is more cylindrical turgid below the 

 middle and strongly constricted towards the rim, the lid is ampler than the orifice and seceding 

 by a clear circumcision, the fruit is generally smaller, with more spreading rim, and the seeds are 

 devoid of any appendage. It is moreover never a large tree and restricted to the subalpine zone 

 of Southern Tasmania. 



The Very Eev. Canon King noticed Melitose-Manna to a small extent on the leaves of 

 E. corymbosa, when pierced by a phyllojshagous Beetle (Anoplognathus cereus). 



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

 section of an unexpanded flower ; 3 and 4, front- and back- view of an anther with portion of its filament ; 5, style and 

 stigma; 6, stamens in situ ; 7 and 8, longitudinal and transverse section of a fruit ; 9 and 10, sterile and fertile 

 seeds, one of the latter cut transversely ; 11, portion of a leaf ; all magnified, but to various extent. 



