Primulaceae. 



201 



their ends wedged together, and they contain chlorophyll 

 granules, like the mesophyll. The stomates are limited 

 to the upper part of the calyx (i. e. the lobes and a narrow- 

 belt below these), and 

 they are about equally 

 numerous on both 

 surfaces. The lateral 

 walls of the epi- 

 dermis are undulating, 

 more especially on the 

 inner surface of the 

 calyx and also on the 

 5 concave depressions 

 between the protruding 

 parts of its outer sur- 

 face; they are less 

 strongly undulated, or 

 nearly straight, on the 

 protruding parts. 



The limb of the 

 corolla has papilla-like 

 arched epidermal cells, 

 which are most promi- 

 nent on the upper 

 surface, especially so 

 round the throat-scales, 

 but these, however, are 

 not papillary. The flat 

 polygonal cells, which 

 cover the throat-scales, were filled with a brown substance 



Fig. 18. Androsaces septentrionalis. 

 A, transverse section of one of the protruding parts 

 of the calyx; under the epidermis of the outer surface 

 is seen a continuous layer of thin-walled cells. B, sur- 

 face-view of this layer. C, the epidermis from the inner 

 surface of the calyx. D, the epidermis from the outer 

 surface. (A, B, C and D, obj. 8 oc. 6.) (Gland.) 



Androsaces chaniaejasme Host. 



Lit.: Wydler, 1859, p. 22. Müller, 1881, pp. 358, 359. 

 Holm, 1885, p. 41; tab. VIII. Eastwood, 1902, p. 211. Knuth 1899, 



