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Transactions. 



very regularly arranged. The amount of phloem is small ; the phloem 

 parenchyma cells contain tannin. Beneath the pliloem there is some 

 stereome, consisting of small cells with very thick walls and small lumen. 

 Stem (fig. 6). — The cork forms a wide band 20-30 cells wide. The cells 

 are large and have thick walls. 





Fig. Q.— Pimelea Suteri. Transverse section of stem (x 175). 

 a, cork ; 6, cortex ; c, fibres ; d, phloem ; e, cambium ; 

 /, trachea ; f/, jjith. 



The cortex consists of large oval cells, which have thick, somewhat 

 mucilaginous, cell-walls. The tissue is compact, only small air-spaces being 

 present. The cells of the outer part of the cortex contain tannin, and those 

 of the inner part contain small drops of oil. There are numerous small 

 groups of pericycle fibres, composed of very small cells with thick walls 

 and small cavities. 



