7 COMMON LI VER IVOR T. 



b. Thicker hairs in various stages of cell-multiplica- 

 tion, from the first division into two cells by a 

 transverse wall, to the fully formed many-celled 

 gemma still attached by \\spedicel. 



c. Draw part of the bottom of the cup, to show inser- 

 tion and form of the glandular hairs and young 

 gemmae. 



8. Examine under a low power the mature gemmce which 

 have floated from the cupule, and note 



a. The shape. 



b. The cellular structure. 



c. Cells here and there devoid of chlorophyll. 



d. The scar left by the pedicel. 



e. The pair of vegetative notches placed midway, 

 one on the right, the other on the left side, in 

 which, when the gemmae are sufficiently mature, may 

 be seen 



/. The early stage of the new plantlets in form of 



delicate papillae. 

 g. Draw. 

 E. THE ANTHERIDIAL BRANCH. 



i. The pedicel. Pull in two a pedicel and remove some of 

 the hairs which protrude from two grooves on its pos- 

 terior face, and lay upon a slide. Now make a trans- 

 verse section of the pedicel and mount with the hairs. 

 Under low power, notice 



a. The general outline of the section, the two con- 

 spicuous grooves or channels, and the uniformity of 

 the whole tissue. Illustrate with diagram. 



Under high power, notice 



b. The colorless dense parenchyma forming the mass 

 of the pedicel, bounded by the surface row of small 



