MAKING THE HERBARIUM 



313 



contain the name of the plant; but the name need not be 

 determined until after the plant is mounted. (Fig. 478.) 



The sheets of one genus are laid together in a folded 

 sheet of strong straw-colored paper. This folded sheet is 





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•178. An herbarium sheet. In this case, the specimens are held in place 

 by strips of glued paper. 



the "genus cover." Its size when folded is 11^x163^ 

 inches. On the lower left-hand corner the name of the 

 genus is written. If one has many sheets in one genus 

 — say more than 20 — it may be necessary to have more than 



