SEED-STRUCTURE OF RAFFLESIACEX AND HYDNORACE. 317 
n its main features secs structure of the seed of A ydnora 
africana is essentially the same as that of Prosopanche, as I have 
been able to pire partially ‘hu dried seeds and partially from those 
preserved in spirits, in the collection at the British aay obligingly 
placed at my ser vice by Mr. Carruthers. (See figures 14, 18, 19 .) 
The uneven testa, evidently originating in the fleshy integument, is 
composed of fragile, thin-walled, nearly empty, dark brown tissue, the 
cells of which bordering the albumen exhibit a thick, homogeneous, 
pels inner wall. (Fig. ) It is therefore similar in construc- 
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i R. feo almost in the centre of the seed ; and here also the 
embryo-cord is throughout its entire zene) pate: Tomes united with 
the surrounding endospermal tissue. (Fig. The cell cavities of 
the latter are somewhat club-shaped, and a rly radiating, taking 
the ovule as the axis, and they gradually decrease in size towards the 
The e embryo-cord of Hydnora consists of a single 1 row of unequal 
quadrate or flattened cells, some of which are usually divided length- 
Wise, giving rise to various irregularities in its shape. At the point it 
gradually extends itself, and from the production of a large number of 
these partitions it assumes the structure of a cellular body, frequently 
pushing itself in at the side of the embryo asashapeless mass of tissue 
(Fig. 14.) In Hydnora, too, the connection between the embryo sm 
in ; more 
ct line of separati But what the degree of relationship 
may be that Spauetk is Rafflesiacee and Hydnoracea to one 
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