72 ELEMENTS OF STRUCTURAL BOTANY. 



in the year. The most remarkable characteristics oi the 

 Order are the gynandrous arrangement of the stamen or 

 stamens, and the cohesion of the pollen-grains, though 

 this latter peculiarity is exhibited also by other groups 

 notably, the Milkweeds. 



CHAPTER XIIL 



EXAMINATION OF SPADICEOUS PLANTS INDIAN TURNIP 

 CALLA. 



94. Indian Turnip. This plant may be easily met 

 with in our woods in early summer. If you are not 

 familiar with its appearance, the annexed cut (Fig. 94; 

 will help you to recognize it. Procure several speci- 

 mens : these will probably at first seem to you to be 

 alike in every respect, but out of a number some are 

 pretty sure to differ from the rest. Notice the bulb 

 from i^hich the stem springs. It differs from that of 

 the Dog's-tooth Violet, and Lilies generally, in having a 

 much larger solid part. It is called a corm. Between 

 the pair of leaves you observe a curious striped sheath, 

 having an arching, hood-like top, and enclosing an up- 

 right stalk, the top of which almost touches the hood 

 (Fig. 95). Can this be a flower? It is certainly the 

 only thing about the plant which at all resembles a 

 flower, and yet how different it is from any we have 

 hitherto examined ! Carefully cut away the sheaths 



