114 ELEMENTS Or STRUCTURAL BOTANY. 



of the j)lant is Ranunculus acrls. In like manner, the 

 name of the plant popularly called Marsh-Marigold is 

 Caltha jxdnstris. 



182. The Kei/ which is prefixea to the Classification 

 will enable you to determine without much difficulty 

 the Order to which a plant belongs, but nothing more. 

 Having satisfied yourselves as to the Order, you must 

 turn to the page on which that Order is described, and, 

 by carefully comparing the descriptions there given 

 with the characters exhibited by your plant, decide 

 upon its Genus, and, in the same manner, upon its 

 Species. 



