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 bulls; 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. 



Pio. 205. — Longitudinal Section of the Summit of a very Small Antliei'idium- 

 rieiiving Plant of Fiinaria hijijromt'trica, a j\Ioss. 



a, young antlieridium ; 6, nearly mature antheridium ; c, appendages growing among 

 the antheridia ; <1, leaves cut through the midrib ; e, leaves cut through the 

 blade. (Magnified 300 diameters.) 



