Classification of Plants 



257 



buds and blue flowers, or from yellow through bluish to violet. 

 In Echiiim the change is from red through violet to blue. This, 

 says Herman Muller, suggests that white, yellow, and red 

 flowers were the ancestors of violet and blue flowers. 

 Heliotrope belongs to this order. 



Order Solanace^e. 



Calyx 5-parted, persistent (except Datura). Corolla con- 

 volute. Petals plaited in bud. Stamens 5, alternate wdth 



Fig. 2.(iO.~-rSolaniim. Flowers, fruit, and seed. (From Henslow's 

 " South African Flowering Plants. ") 



and upon the petals. Carpels 2, placed obliquely in the 

 flower. Flowers solitary or in cymes. Herbs, shrubs, or small 

 trees. Fruit a capsule or berry. A large order abounding in 

 the Southern Hemisphere. But for the position of the ovary, 

 the order might be merged with Scrophulariaceae. 



Fruit a many-seeded berry. 



Solanum. — Anthers opening by terminal pores. 



Pliysalis. — Anthers openhig lengthwise. Calyx covering the fruit. 



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