72 ELEMENTS OP STRUCTURAL BOTANY. 



in the year. The most remarkable characteristics of 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 Xllt 



EXAMINATION OP SPADICEOUS PLANTS — INDIAN TURNIP — 

 OALLA. 



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 -^hich the- stem springs. It difiers 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 ail resembles a.' 

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

 hitherto examined ! Carefully cut away the sheaths 



