THE HOP PLANT. 



25 



surface. The basal cell formed by the primary subdivision 

 of the mother cell is, in many clubbed glands, converted by 

 repeated longitudinal and transversed subdivisions into a 

 longer or shorter multicellular stem. 



The stems of the disc glands. (Fig. 13) are short, and 

 mostly consist of the -original basal cell divided into two 

 daughter ceils. The crown cell undergoes repeated sub- 

 division, and develops in the. shape of a disc ; and a secretion 

 is deposited between the outer walls of the gland cells and 

 the cuticle, thus raising the latter to some extent. 



(6) 

 Fig. 15. — (a) . Developed fruit withpericardium, magnified ^-f-. 

 (6) Lupulin granule, magnified ij^. 



The cup-shaped gland (Fig. 14) is a disc, the edges of 

 which turn up so as to form a kind of cup. The deposition 

 of the glandular secretion occurs under the cuticle before the 

 subdivision of the cells is completed, and in this manner 

 the cuticle is continually hfted higher and higher until finally 

 it has the appearance of being stretched like a cover oveC 

 the contents of the gland (Fig. 15 b). In addition to the 

 glands already described, certain tufts of unicellular hairs 

 appear, on the members, of the hop cone. 



According to Holzner and Lermer, the typical forms of 



