EUCALYPTUS STUARTIANA. 



promulgated here from ampler material and fartlier field-studies, it seems better to maintain 

 the name E. Stuartiana for the present species, than to give it a new specific appellation. 



The differences, which separate E. Stuartiana from E. viminalis, are as follow : the tree is 

 more umbrageous by virtue of its comparatively sjireading and dense branches and foliage, hence 

 in this respect more like E. Gunnii ; the bark is extensively persistent, of softer structure and 

 more fibrous, so much so indeed as to allow this species to pass almost as a Stringybark-tree ; 

 the leaves unlike those of E. viminalis afford no manna-like saccharine excretions, they are also of 

 a more pleasant scent reminding slightly of the odor of apples, while their veins are not quite so 

 spreading and the oil-dots generally more copious and transparent ; the stem of the seedlings is 

 more quadrangular, their leaves are roundish or broad-ovate or even cordate, faintly tinged with 

 whitish bloom, not very narrow nor bright-green as in E. viminalis, though at first likewise 

 opposite and sessile ; the wood is darker, when dry and aged very much so, as observed by 

 Mr. Boyle, who confirms also most of the other characteristics here given, and states that this 

 Eucalypt is often accompanied by a stunted state of E. obliqua, but keeps away from any richer 

 adjoining ground of alluvial valleys, studded over by E. Gunnii and E. viminalis, contrasting with 

 both species at the first glance in its bark ; the foliage is of a more saturated and more shining 

 green, the lateral veins of the leaves are rather more distant, not quite so spreading and hardly so 

 distinctly visible ; the flowers in each umbel are as a rule 6-8, although sometimes they may also 

 be reduced to 3 and very exceptionally even to 2 or 1 ; the lid of the calyx is usually shorter, if 

 even only slightly so ; the fruits are prevailingly 3-celled, not as in E. viminalis predominently 

 4-celled and often somewhat smaller. 



The disparities, by which E. Stuartiana (as here adopted) can be distinguished from B. Gunnii, 

 the real Swamp-Gum-tree, consist in its bark never decorticating to a perfect smoothness unless 

 on the branches and upper part of the stem, in generally longer much narrower more curved and 

 not almost equilateral leaves mostly of thinner consistence, with less prominent veins and more 

 numerous jjellucid oil-pores, in often smaller fruits with more protruding rim and valves, in which 

 latter respects as well as in its leaves E. Stuartiana approaches more closely to E. viminalis than 

 to E. Gunnii. It moreover reaches never any very high mountain-elevations, whereas the latter 

 ascends actually up to alpine regions. 



The variety longifolia of E. Stuartiana, recorded by Bentham, belongs to E. punctata (Cand. 

 Prodr. iii. 217 ; mem. des MyrtacSes t. 4) the "Leather-Jacket" of the colonists of New South 

 Wales, which differs specifically in more solid and smoother bark, stouter very angular branchlets, 

 leaves opaque and paler beneath, the lateral veins more spreading and finer still, the perij^heric 

 vein almost contiguous to the edge, nearly obliterated oil-dots, at least partially j)aniculated 

 flowers, stronger more compressed and often longer flowerstalks, also usually thicker and more 

 elongated stidldets, the lids longer and more gradually pointed, the stamens more elongated with 

 seemingly darker filaments, the border of the ripe fruit less convex or even flat. 



E. Stuartiana bears the name of an assiduous collector of Tasmanian plants, who subsequently 

 also largely contributed to our knowledge of the vegetation of New England through museum- 

 material. The aboriginal apjjellation " But-But " arose with the natives of Gippsland according 

 to information from Mr. W. Howitt. 



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

 expanded flower ; 3, some stamens in situ ; 4 and 5, front- and back-view of anther with portion of filament ; 6, stigma 

 and portion of style ; 7, longitudinal section of young fruit ; 8 and 9, transverse section of fruit ; 10, longitudinal 

 section of fruit ; 11 and 12, fertile and sterile seeds ; 13, portion of a leaf ; all magnified, but to various extent. 



