186 



BOTANY. 



In the columbine (Aquilegia) (Fig. 99, F) the petals are 

 tubular, forming nectaries, and in the larkspur (Fig. 99, T) 

 one of the sepals is similarly changed. 



Representing the custard-apple family (Anonacece) is the 

 curious papaw (Asimina), common in many parts of the United 



FIG. 99. Types of Aphanocyclse (Polycarpse) , family Ranunculacese. A, Rue 

 anemone (Anemonilld) , x %. B, a fruit, x 2. C, section of the same. D, 

 section of a buttercup flower (Ranunculus), x 1%. E, diagram of buttercup 

 flower. F, wild columbine (Aquilegia), x %. G, one of the spur-shaped 

 petals, x 1. ff, the five pistils, x l. jr longitudinal section of the fruit, x 1. 

 J, flower of larkspur (Delphinium), x \. K, the four petals and stamens, 

 after the removal of the five colored and petal-like sepals, x 1. 



States (Fig. 100, A). The family is mainly a tropical one, 

 but this species extends as far north as southern Michigan. 



The magnolia family (Magnoliacece) has several common 

 members, the most widely distributed being, perhaps, the 

 tulip-tree (Liriodendron) (Fig. 100, C), much valued for its 

 timber. Besides this there are several species of magnolia, 

 the most northerly species being the sweet-bay (Magnolia 



