420 



Fr. J. Mathiesen. 



C, D and Æ", it becomes evident, that this form of glands 

 in Bartschia — as already pointed out by Heinricher (cf. 

 his addition to the cited paper of Scherffel) — belongs 

 to the Lathraea-iyipe Hke the similar ones in Euphrasia. Fig. 

 19, / and K show these glandular hairs seen from above; 



* K 



Fig. 19. Bartschia alpina. 

 Different types of non-glandular and glandular hairs from the leaf. 



{A—E, about »°/i; F—K, about - 



90/ 



11- 



below the stalk-cell the lateral walls of the epidermal cells 

 are indicated by dots, in K two intercelliilar spaces are formed 

 between them, 2 — 4 of these are found rather commonly 

 under the hairs. A glandular hair, similar to that which is 

 seen from above in K, is shown in H in transverse section, 

 here also 2 intercellular spaces are distinctly seen. G and / 

 have no intercellular spaces of this kind. Glandular hairs of 

 type 4 occur only on the lower surface of the leaf, under 

 the branches of the veins of higher order; in the same place 

 there is found in addition to this a great number of hair 



