CHAPTER XXII 



SPECIAL EXERCISES WITH IMPORTANT FAMILIES 

 OF PLANTS 



Note to the Teacher. — This outline is intended to be 

 very brief and to serve as an outline for further reading in 

 various books which should be in the study-room or laboratory. 

 The exercises are also brief and may be expanded as circum- 

 stances may demand. They may be taken in any order to suit 

 the convenience of the teacher. Other exercises may be added 

 to the list or substituted. 



1. The Lily and Its Relatives. — Dissect and study the 

 flower of the lily. Make a series of drawings to show the shapes 

 of the parts and i-elations one to another. 



Study flower of amarillis, iris, onion and other similar 

 plants and compare with the lily. 



2. Mustard or Radish. — Select a mustard, radish or any 

 other cruciferous plant in full bloom. Note the differences in 

 the leaves, in the different parts of the plant from base to tips. 

 Make drawings of a few typical specimens. 



Dissect the flower, make drawings of the different parts and 

 a diagram showing the number and arrangement of the parts. 

 The character of the ovary can be best studied from seed pods 

 near maturity. 



Examine the seeds and make drawings. 



Examine the roots and make drawings. Compare with 

 the roots of other cruciferous plants. 



How long from seed planting to maturity of a new crop 

 of seeds ? Is this the same for all crucifers ? 



!^^ake a list of food plants belonging to this family. Make 

 a list of native weeds, belonging to this family. 



8. Maple. — The flowers of the maple open very early ; some 

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