232 Mr. W. B. Hemsley. On the Julianiacece, [June 6, 



flattened pedicel and the exserted styles, are about 2 cm. long, and as they 

 are seated close in the axils of the crowded leaves, and of the same colour, 

 they are easily overlooked. The female flowers are destitute of a perianth, 

 and consist of a flattened, one-celled ovary, terminated by a trifid style and 

 containing a solitary ovule. The ovule in both genera is a very peculiar 

 structure. I will first describe that of Juliania. In the flowering stage it is 

 a thin, flat, obliquely horseshoe-shaped or unequally two-lobed body, about 

 2 mm. in its greatest diameter, attached to the base of the cell. At a little 

 later stage, in consequence of unequal growth, it is horizontally oblong, nearly 

 as large as the mature seed, that is 6 to 8 mm. long, and almost symmetrically 

 two-lobed at the top. A vascular bundle or strand runs from the point of 

 attachment to the placenta upwards near the margin into one of the lobes. 

 In this lobe the embryo is tardily developed, and at this stage it is more or 

 less enclosed in the opposite lobe, the relations of the two being as nozzle and 

 socket to each other. It is assumed that the whole of this body, with the 

 exception of the lobe in which the embryo is formed, is a funicle with a 

 unilaterally developed appendage, which breaks up and is absorbed during the 

 development of the ovule into seed. A similar growth and transformation 

 is unknown to me in any other natural order. 



The ovule of Orthopterygium is very imperfectly known, but the attachment 

 appears to be lateral and the funicular appendage cup-shaped at the basal 

 end, bilamellate upwards, and more or less enclosing the embryoniferous lobe. 



Mr. Boodle, who has fully examined the ovule of Juliania from microtome 

 sections, describes it as hemianatropous with a single integument. 



The compound fruits of Juliania are samaroid in form, the wing being the 

 flattened pedicel, at the base of which it disarticulates from the undifferentiated 

 part of the pedicel. They vary from 4 to 7 cm. in length by \\ to 2 \ cm. in 

 width. Externally they strongly resemble the samaroid pods of certain 

 genera of Leguminosse, notably those of Platypodium and Myroxylon. The 

 involucre itself, of the largest fruits seen, is only about 1 cm. deep by 2 cm. 

 wide. It is composed of very hard tissues and is quite indehiscent. Only 

 quite young fruit of Orthopterygium is known. In this the flattened pedicel 

 is narrow, straight and sequilateral, from 6 to 7 cm. long and about 1 cm. 

 wide. 



The nuts of Juliania are almost orbicular, biconvex, hairy on the outside 

 and have a very hard endocarp. The solitary exalbuminous seed is circular 

 or oblong, 6 to 10 mm. long, compressed, with a smooth, thin testa. The 

 embryo is horizontal, with thin plano-convex, more or less oblique, obscurely 

 lobed cotyledons, which are epigseous in germination, and a long ascending 

 radicle applied to the edges of the cotyledons. 



