Cornaceæ. 



141 



surface, below the phloem, a slight sclerenchyma, which is 

 not present in the smaller ones. 



The Stem (fig. 5). The aerial shoot is annual. The epid- 

 ermis has thickened outerwalls and is covered by a thin 

 cuticula, striped parallel to the stem's longitudinal axis; 



Fig. 6. Cornus suecica. 



Transverse section of rhizome ; S, Cork ; cb, Cambium ; had, Hadrome 

 (Egedesminde, Greenland), about -'"/i- 



stomata are present. Five layers of large chlorophyllaceous 

 bark-cells follow inside the epidermis, and after these a 

 more or less developed annular schlerenchyma, consisting of 

 elongated parenchymatic cells, with much thickened walls 

 (fig. 5, sc). The phloem appears inside this annular scleren- 

 chyma and, like the woody tissue, forms a coherent ring 



