THE ANGIOSPERMS 263 



b. Apetalous Dicotyledons 



95. What is the structure and ecology of the Willow? 



96. What is the structure and ecology of the other 



Apetalae supplied ? 



c. Polypetalous Dicotyledons 



97. What is the structure and ecology of the forms 



supplied ? 



d. Gamopctalous Dicotyledons 



98. What is the structure and ecology of the forms 



supplied ? 



99. Prepare a synoptical essay, not to exceed three 



hundred words, upon the Angiosperms, empha- 

 sizing their ecology and relationships. 

 100. Prepare a genealogical tree which shall repre- 

 sent the descent of the Angiosperms from the 

 Algae, showing their probable phylogenetic 

 connections. 



Materials. This part of the course will come in the spring 

 when there is abundance of material out of doors, and no 

 doubt plenty of plants in all of the groups are everywhere 

 available. Of course, also, typical kinds may be kept in 

 formaline, or even dried, though the latter is not to be 

 recommended. The aim should be to secure representatives 

 of the different leading groups. 



Pedagogics. This part of the course is the most familiar 

 to teachers, and hence there is little need for special direc- 

 tions. For an apetalous form, Willow is particularly good, 



