EUCALYPTUS MACROCAEPA. 



Hooker, icones plantaram 405-407 (1842) ; Botanical Magazine t. 4333 ; Schaner, in Lehmann plantas Preissianse 

 i. 132 ; Walpers, repertorium botanices systematicae ii. 164 ; Paxton, Magazine of Botany xv. 29, with 

 illustrative figure ; F. v. M., fragmenta phytographise Australia) 11. 41 ; Bentham, flora Australiensis Hi. 224 ; 

 A. Smith, in Lindley's and Th. Moore's Treasury of Botany, with woodcut, 1866, 1873 and 1876. 



Shrubby, all over mealy with a whitish bloom; leaves all opposite, sessile, ovate- or roundisk- 

 heartshaped, short-pointed, clasping with bilobed base ; veins rather close, much spreading, the 

 circumferential vein at some distance from the edge of the leaf ; oil-dots numerous, mostly 

 concealed ; Jlowers very large, nearly sessile, solitary, axillary ; tube of the calyx depressed- 

 turbinate, not quite so long as the hard pyramidal-semiglobular short-pointed lid, not con- 

 spicuously angular ; stamens all fertile, the inner much inflexed before expansion, the outer only 

 incurved at the apex ; filaments orange-colored or crimson, seldom pale ; anthers almost oval, 

 opening with marginal slits ; stigma not broader than the summit of the style ; fruit very large, 

 its calycine portion depressed turbinate, not angular, the discal portion very broad, ascending ; 

 valves exserted, 4-5 or rarely 6, large, nearly deltoid ; fertile seeds much larger than the partly 

 very narrow sterile seeds and edged by a hroadish marginal membrane. 



From Dungin-Peak eastward through the Guangan-Desert (J. Drummond) ; in the scrub- 

 country near the south-eastern sources of Swan-River (Oliver Jones) ; in the arid somewhat 

 elevated and undulated tracts between the Irwin- and Greenough-River as well in sandy as in 

 gravelly soil (F. v. M.) ; near the north-eastern sources of the Black wood- River (Th. Muir). 



TaU and ample as a shrub, but never, so far as known, of truly arborescent growth. 

 Branchlets stout, at first angular, but generally soon cylindrical. Leaves rather crowded on the 

 branchlets, of stiff consistence, occasionally as much as 5 inches long and S-^ inches broad, the 

 greyish or bluish-white bloom finally much evanescent ; oil-dots transparent only in young leaves. 

 Lid almost woody, attaining a height of nearly H inches, slightly streaked, sharp at the edge. 

 Filaments angular, those of the outer stamens reaching a length of fully an inch. Anthers 

 yellow, fixed near or above the base, sometimes verging almost into a cordate form, those of the 

 outer stamens not concealed by the slight infraction of their filaments. Style rather long. 

 Fruit 1^2^ inches broad, surrounded by an annular somewhat sharp margin, from which the 

 broad discal portion of the vertex concavely ascends, which latter however may at advanced age 

 become somewhat convex. Valves finally erect. Placental column at last semiovate-pyramidal, 

 the cavity of the cells penetrating beneath the placentas. Fruitstalk sometimes \ inch long. 

 Fertile seeds radiating-angular from the hilum to the membranous margin, the whole measuring 

 2-3 lines ; some of the sterile seeds quite as long or even longer, but remarkably slender. 



There is only one other species of Eucalyptus, to which E. macrocarpa stands really in near 

 affinity, namely, E. pyriformis ; for notwithstanding the great disresemblance arising from the 

 not general glaucous hue, from the stalked as well as scattered and narrower leaves, and from 

 the generally three-flowered umbels of the latter, it must be conceded that flowers and fruits are 

 constructed upon the same type ; indeed in Drummond's collection occur specimens of E. 

 pyriformis with opposite and already broader leaves though stalked and green ; the mealy 

 whiteness however of E. pyriformis is confined to the young calyces cliiefly or solely, the flower- 

 stalks are never wanting, the tube of the calyx is often contracted into a distinct stalklet, the 

 disk of the fruit-summit is more elevated, ascends above the base of the valves and may even 

 overreach them, while tlie calycine portion of tlie fruit is usually distinctly marked with radiating 

 narrow ridges, a characteristic in which the lid also mostly participates. But in the variety 



