ADI A NTUM FED A TUM. 1 05 



The requisites for the complete study of this plant 

 are dried and alcoholic specimens of leaves ; alcoholic 

 specimens of roots and stems ; fresh prothallia ; alco- 

 hol ; iodine ; potassic hydrate ; and solution of potassic 

 chlorate. 



LABORATORY WORK. 

 GROSS ANATOMY. 



A. GENERAL CHARACTERS. Taking a complete 

 plant, notice the four parts into which it may be readily 

 divided : 



1. The horizontal, very dark brown, or almost black, un- 

 der-ground stem, the rhizome, from which are given off 



2. A number of slender branching fibers, the roots. 



3. The aerial portion, the leaf or frond, consisting of 

 slender polished stalks, and flat green expansions, the 



blades. 



4. The appendages to the surface, trichomes, in the form 

 of scales on the rhizome, hairs on the roots, and repro- 

 ductive bodies on the leaves. 



B. THE STEM or RHIZOME. Notice 



1. The size, shape and surface. 



2. The occasional branching. 



3. The nodes and internodes ; the nodes are indicated by 

 the growth of a leaf at each, alternately on the right 

 and left sides ; the intervals between the nodes are the 

 internodes. 



4. The growing apex ; the dying base. 



5. The buds near and at the apex. Strip off carefully 



