A MANUAL OF BOTANY 55 



solid round spots, and the pistil by .a ring properly divided 

 to show the number of cells in the ovary. Be sure to have 

 each part properly located with reference to the adjacent 

 structures. 



This is called Sifloiver plan or diagram. 



Characters of Lily family. See if your study of these 

 examples of the Lily family agrees with the following 

 characterization : — 



The Lily family is monocotyledonous, coinmonly has bulbs 

 or rhizomes, flowers with three sepals and three petals, 

 usually similarly colored (often called the perianth), six 

 stamens in two rows, a single superior ovary having three 

 stigmas and cells. You ought to consult Gray's "Manual 

 of Botany," and familiarize yourself with the characteriza- 

 tions of the families to which the plants you study belong. 



Learn also, by continuous practice, how to analyze a flower, 

 or determine its name by a " key." 



The study of other forms of the Lily or other monocotyle- 

 donous families may be undertaken, following the same 

 guides as used in Trillium and Erythronium. 



5. Demoxstratiox of ax Orchid — The Lady Slippers 

 (Cypripedium)^ 



Statement. It is not advisable to use orchids for individ- 

 ual class work because of the increasing scarcity of this 

 beautiful group and the consequent danger of helping on 

 their extermination. As the most specialized of the mono- 

 cotyledons, however, they ought to receive attention by a 

 demonstration before the class, dwelling in particular on 

 their adaptation to insect pollination. 



The plant. The leafy stem crowded from base to flower 

 with large parallel-veined leaves and arising from a peculiar 



1 Tlie Iris is equally good, and may be used with necessary changes 

 in wording. 



