EUCALYPTUS MACKOEBHYNCHA. 



In specific botanical affinity E. macrorrhyncha stands nearest to E. capitellata ; leaves and 

 fruits of both are the same ; but the flowers of the latter are always sessile or nearly so and thus 

 crowded into heads as the species-name signifies, besides being usually smaller ; the lid of E. 

 capitellata is hemispheric, without any prominent point and shorter in proportion to the tube, the 

 latter being also more angular and downward less attenuated. 



E. santalifolia (F. v. M., in the Transactions of the Victorian Institute i. 35) from the 

 limestone-ridges of Guichen-Bay and thence westward to Venus-Bay beyond Spencer's Gulf, 

 differs in smaller and less oblique leaves with more concealed veins and anthers rather cordate 

 than kidneyshaped, but the fruits are again the same, unless the valves are smaller. Possibly it 

 may prove a variety ; it flowers already in a shrubby state. I have not seen the lid of its calyx. 



The variety brachycorys, mentioned by Bentham, seems transferable to E. capitellata, unless 

 indeed it should prove distinct from both, when as a species it could be kept apart under the 

 above designation. 



EXPLANATION OF ANALYTIC DETAILS. 1, summit of calyx, the lid detached ; 2, longitudinal section of an 

 unexpanded flower ; 3 and 4, front- and back-view of an anther ; 5, three stamens in situ, all fertile ; 6, style 

 with its stigma; 7 and 8, longitudinal and transverse section of fruit; 9 and 10, sterile and fertile seeds; 11, 

 epidermis, showing its cells and stomata, diametrically 125 times magnified ; 12, portion of a leaf to exhibit the 

 venation and oil-glands ; all figures except 11, only moderately magnified, the ratio of augmentation easily perceived 

 by comparison of the main figure, which in all plates of this Atlas represents natural size. 



ANATOMIC PLATE. 1, cellular cuticle of the leaf, showing also the breathing pores or stomates ; 2, transverse 

 section of aged wood, the large openings representing the vascular tubes ; the rows of elongated cells constitute the 

 medullary rays ; the scattered cells and those near the vascular tubes are parenchyme ; the rest show the transverse 

 form of the numerous woody fibres, all closely set and in diameter smaller than the parenchyme-cells ; 3, tangential 

 section of aged wood ; wide and dotted vascular tubes, rows of cells of the medullary rays cut transversely, 

 sparingly dotted woody fibres, parenchymatous ampler interstices ; 4, radial section of aged wood, wide dotted 

 vascular tubes, rows of cells of the medullary rays cut vertically, sparingly dotted woody fibres, parenchymatous 

 ampler interstices ; all magnified 214 times diametrically. 



