150 STUDY OF COMMON PLANTS. 



XVIII. AMARYLLIS FAMILY. 

 AMARYLLLDACE^E. 



MATERIAL REQUIRED. 



Flowers of the cultivated Amaryllis in various stages of development. 



Specimens should be selected that have just opened, others more 



advanced, and still others that have been open a longer time. In 



addition to these a single entire plant. 

 Other representatives of the family that are procurable, such as 



Hypoxis, Galanthus, or Narcissus, in flower. 



I. In what particular does the flower of the Amaryllis 

 differ from that of the lily ? From that of the Iris ? 



II. How does the plant as a whole differ from those of 

 the Iridacese that you have studied ? 



III. Compare a number of flowers of Amaryllis, in differ- 

 ent stages of development. What arrangements do you 

 find for cross-fertilization? To what class of visitors are 

 many of the plants of this family adapted ? 1 



IV. Having examined as many plants of the Amarylli- 

 dacese as are to be had, enumerate the essential features 

 that they possess in common. 



V. Finally point out the characters in which all three 

 families, Amaryllidacese, Iridacese, and Liliacese, agree. 



The close relationship of these three families of plants is 

 obvious upon acquaintance with even a few species. The 



i Cf . Miiller, Fertilization of Flowers, p. 560. 



