238 



ELEMENTS OF BOTANY. 



Pry off this lid, remove some of the mass of spores from the interior 

 of the urn, observe their color as seen in bulk through the magnifying 

 glass, then mount in water, examine with the highest obtainable power 

 of the microscope and sketch them. These spores, if sown on moist 

 earth, will each develop into a slender, branched organism, consisting, 

 like pondscum, of single rows of cells, Fig. 206, called the protonema. 



Fig. 205. — Longitudinal Section of the Summit of a very Small Antheridium- 

 Bearing Plant of Funaria hi/grometrica, a Mobs. 



a, young antheridium ; b, nearly mature antheridium ; c, appendages growing among 

 the antheridia ; d, leaves cut through the midrih ; e, leaves cut through the 

 blade. (Magnified 300 diameters.) 



