Mr. Griffith on the Arnbrosinia ciliata of Roxburgh. 267 



peduncles when present being interposed. The rudimentary stolones always 

 correspond to the axils of every alternate sheath. In the young spadices the 

 antheriferous portion is as it were sessile on the top of the ovaria, the filiform 

 portion being a subsequent development. The inner surface of the convolute 

 limb is at the same period smooth and shining. The septum is perfectly 

 developed at a very early period, and then closes up the tube completely ; it 

 already covers, but does not adhere to the apex of the spadix, and hence the 

 subsequent slight obliquity of the upper portion of this body. At an inter- 

 mediate period the apex of the spadix adheres strongly to the septum, but 

 subsequently regains its original free state. The septum appears to originate 

 in a production downwards from the commencement of the division of the 

 limb, to which part it always corresponds. The antheriferous portion is well 

 supplied with vessels, fascicles of which pass off from the central bundles to 

 the anthers, corresponding to the central cellular part or septum that exists 

 between the thecae. The anthers may from a very early period be compared 

 to two cups joined together by their contiguous margins; the wide and open 

 mouth which they present in their mature state being closed up originally by 

 an extremely fine membrane, lining the cavity of the cup and forming a 

 convexity where it closes in the opening. Within the cavity thus formed the 

 pollen is developed. As the anther increases in size this membrane gradually 

 assumes the form of a cone, which projects in proportion as it increases beyond 

 the margins of the cups or thecae. At the same time it assumes a yellow tint, 

 by which, chiefly, I am led to think that it lines the entire cavities of the 

 thecae. The cellular tissue of the thecae consists of a cutis, which is papillose 

 on the margins of the cup, and an inner series of ovate cells arranged with 

 their long diameters pointing from the axis. On the membrane of these cells 

 very distinct fibres are developed, which almost always have the same direction 

 with the cells. These fibres cross each other at very acute angles, and appear 

 to be incomplete at either end of the cell, in which they are developed. The 

 cone soon becomes more subulate, it remains closed, and is of a yellowish 

 tint. The anthers appear to be fully formed at a time when the spadix is only 

 half-developed. At a later period the apex of the cone is open, and through 

 this opening the contents of the thecae may be squeezed, assuming, from the 

 coujparatively small diameter of the apex of the cone, a more or less elongated 



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