95 



Take, for example, E. setosa, Plate 256, fig. la, one of the winged Corymbosae, 

 Woolngi, Northern Territory, Dr. H. I. Jensen. In this species the hilum is close to 

 the lower ventral portion of the seed, and might be termed semi-basal, while in 

 E. perfoliata, fig. 7a, Lennard River, W. V. Fitzgerald, it is somewhat semi-ventral. 

 In the latter case, the development of the seed has been much greater on one side 

 of the hilum than the other, which makes it appear to be more lateral than ventral. 



The term " lateral " is somewhat misleading, and perhaps such species as 

 E. corymbosa and E. calophylla may have given rise to the term. The seeds of both 

 are narrow and compressed laterally, with a ventral hilum, and owing to their narrow- 

 ness some authors refer to the hilum as being " lateral." 



Excellent examples of the ventral hilum in other members of the Corymbosae 

 are to be found in all the species belonging to the Series Naviculares (b). For instance; 

 see E. Watsoniana. Plate 257, fig. 46, and E. eximia, Plate 257, fig. 5a, which are 

 broadly navicular and compressed dorsi vent rally, i.e., the opposite to E. corymbosa 

 and E. calophylla. 



In any case, the hilum does not appear to be strictly lateral in any seeds of the 

 genus. If the testa is removed, it will be found in a large number of cases that the 

 scar beneath it is often larger and more distinct and definite in shape to that observed 

 on the testa. 



9. -SCULPTURE. 



As might be expected in such a large and diversified genus, there are variations 

 in the sculpture of the seeds, but to a lesser extent than that observed in the morphology 

 of the fruits. 



The seeds may be divided into two main divisions, viz., Winged and Non- 

 Winged, the latter kind being far more numerous than the former. 



The winged series may be conveniently divided into three main groups — 



(a) Those terminating in a broadish, more or less oblique, usually obtuse, wing, 

 as in Series Terminaliptera of the Corymbosae or part thereof. 



(6) Those with a dorsal wing, or the testa expanded from the dorsal to the sides, 

 as it were, into two semi-circumferential wings, as in Series Cochleata. Or' 

 perhaps almost circumferential wings, with 3-5 rather prominent spreading 

 nerves, as in E. Todtiana, fig. 1, Plate 264, Part LXV. 



(c) Seeds mostly compressed dorsiventrally with a circumferential wing, and 

 which is sometimes accompanied by one or more narrow, or rudimentary 

 wings, as in Series Heteroptera. Or the wing may be represented by a very 

 narrow membranous margin only. See Series Kochioides, Micromembraneae, 

 and Scutiformes. Some of the members of this group seem to merge into 

 group (b), the seeds of which are scarcely compressed. 



