8" 



The stem and the roots have not been particularly 

 examined. 



[Cliimopliila umbellata (L.) DC. (Fig. 5.) 



Material is at my disposal only from the wood "Sandflugts- 

 plantage" at Rönne in Bornholm. 



This species, the leaves of which are coriaceous, presents 

 quite a different type of leaf from those of the three mentioned 

 above. It stands in the same relation to Pirola uniflora as 

 Arctostaphylos Uva-ursi does to Vaccinium Myrtillus. 



The leaf is 

 dorsiventral with 

 thick outer layers 

 in the epidermis, 

 consisting of a 

 thickened cuticle 

 and cuticularized 

 layer. Stomata oc- 

 cur only on the 

 lower surface and 

 on a level with the 

 epidermis. Hairs 

 are absent ; starch 

 occurs in both the 

 upper and the lower epidermis. 



The palisade-tissue consists of from two to three layers 

 of cells. The structure of the spongy parenchyma is loose 

 and it consists of elongated cells, elongated more or less in 

 the direction of the length of the leaf. Hydathodes are absent. 



Annual rings are distinctly visible in the stem. Petersen, 

 p. 72 ; Segerstedt, pp.35 — 37. 



The roots have not been investigated.] 



Fig. Ô. Chimophila umbellata. 



Cf. note p. 81. (Bornliolm: Rönne.) (H.E. P.) 



Of the above five species only Pirola grandiflora and 



