EUCALYPTUS GRACIUS. 



E. gracilis differs from E. largiflorens in shining leaves not of a greyish hue, more numerous 

 and still finer veins and more perceptible oil-dots, in the numerous sterile stamens, anthers 

 opening laterally, less towards the summit, flowers generally larger, less copiously paniculated, 

 more angular calyx, the lid not rarely pointed, often somewhat larger fruit with not distinctly 

 contracted summit, and also in not extensively persistent bark ; but seemingly a variety of 

 E. largiflorens from Northern Queensland exhibits also shining leaves of vivid green. E. paniculata, 

 particularly in its variety fasciculosa, coincides also in many of its characteristics with E. gracilis, 

 with which it is intermingled in the Mallee-scrub ; but the leaves are larger, less shining, slightly 

 paler beneath than above, not distinctly dotted, with several times less stomata above than 

 beneath and have the margin slightly recurved as is customary in the species with heterogenous 

 and hypogenous stomata ; the circumferential vein is rather nearer to the margin of the leaf, 

 while the lateral veins are more spreading and prominent, the flowers are on the whole larger and 

 mostly paniculated, the anthers truncated and open with terminal pores. 



E. uncinata, another of the Mallee-species, is best separated from E. gracilis by its often 

 narrower leaves with more spreading veins, usually still more abbreviated stalklets, not at all 

 angular calyces, less inequality in the length of their tube and lid, not flexuous filaments but all 

 fertile, anthers opening by terminal pores, proportionately longer style, upwards very narrow 

 acutely pointed and partially emersed capsular valves and thicker rim of the fruit, which as a 

 rule is smaller and more roundish. 



E. oleosa recedes from E. gracilis in having the veins of the leaves rather more transverse, 

 the marginal vein closer to the edge, the calyces never angular, the lid very seldom shorter than 

 the tube of the calyx, the latter often more suddenly contracted into the stalklet, the stamens all 

 fertile, the anthers opening rather by slits than pores though amply so, the style longer, the fruit 

 more contracted at the orifice with pointed and partly protruding valves, the latter forming a 

 conical summit before expansion and the rim thicker ; moreover the bark of E. oleosa remains 

 persistent on aged stems and becomes finally rough. 



E. decurva (fragm. phytogr. Austral, iii. 130) is recognized already by its elongated anthers 

 which are very evidently longer than broad opening with parallel narrow slits, quite agreeing with 

 those of genuine species of the series Parallelantherte ; but Bentham's description of E. decurva 

 in the flora Australiensis iii. 249 refers extensively to such varieties of E. oleosa, as verge to 

 E. falcata and E. goniantha, all of which with E. concolor should in the anthereal system be placed 

 close to E. decipiens among the Micrantheraa. 



E. dumosa in comparison to E. gracilis can mainly be recognized by the absence or extreme 

 shortness of its stalklets, the calyces not or less angular, the stamens all fertile, larger anthers 

 opening by ample slits and mostly larger fruits. Nearly the same characteristics remove 

 E. incrassata, but that species is besides larger in all its parts, its leaves are broader, the flower- 

 stalks very much flattened, the calyces often furrowed-streaked ; both form the transit from the 

 Parallelantheraa to the Micranthera3. 



EXPLANATION OF ANALYTIC DETAILS. 1, unexpanded flower, lid lifted ; 2, longitudinal sections of unexpanded 

 flowers ; 3, sterile and fertile stamens in situ ; 4 and 5, back- and front-view of anthers with filaments ; 6, style and 

 stigma ; 7 and 8, longitudinal and transverse sections of fruits ; 9 and 10, fertile and sterile seeds ; 11, portion of a 

 leaf; all magnified, but to various extent. 



