34 



FOUNDATIONS OF BOTANY 



sedges, the grasses, and some other plants, there is but one 

 cotyledon. Upon these facts is based the division of most 

 flowering plants into two great groups : the dicotyledonous 

 plants, which have two seed-leaves, and the monocotyledon- 

 ous plants, which have one seed-leaf. Other important 

 differences nearly always accompany the difference in 

 number of cotyledons, as will be seen later. 



46. Tabular Review of Experiments. -- Make out a 

 table containing a very brief summary of the experiments 

 thus far performed, as follows : 



47. Review Sketches. Make out a comparison of the 

 early life histories of all the other seedlings studied, by 

 arranging in parallel columns a series of drawings of each, 



