296 COLLEGE BOTANY 



Examine a thallus showing the cUpules containing the gemmae. 



Examine the reproductive branches. Note their location and differences. 



Examine prepared sections showing the antheridia. Note their loca- 

 tion and cell structure. 



Examine prepared section showing archegonia. Note their location 

 and cell structure. 



II. Sporophyte. Examine a plant in which the sporophytes are almost 

 mature. Note their location and general character. 



Crush a capsule and examine the spores and elaters. 



Exercise 2. Moss plants. 



1. Gametophyte. Examine an ordinary moss plant. Note the prim- 

 itive stem, the arrangement of the leaves, and the rhizoids. 



Examine a rhizoid under the microscope and compare with those- of 

 M. polymorplia. 



Examine a single leaf. Note the thickness, the variation in cells and 

 the absence of stomata. 



Examine a protonema under the microscope. Note the oblique septa. 

 Compare with the algae. 



Examine a preparation from the tip of a- male plant and note the 

 antheridia and paraphyses. 



Examine a preparation from the tip of a female plant and note the 

 archegonia and paraphyses. 



Sporophytc. Examine a mature plant and note the setae, capsule and 

 calyptra. Remove the calyptra and operculum and note the peristome. 



Examine some of the spores under the microscope. 



