THE GEAMLNE^E. 181 



GLUMES. Scales of the spikelet, and exterior 

 scales of the flower. 



PALETS. Chaffy, inner scales of the flower. 



AWN. The beard or bristle of a scale. 



SQUAMULA. One of the minute scales at the base 

 of the ovary of grasses. 



The following questions, which form a schedule 

 for this group of plants, are answered as if asked 

 concerning Figs. 336'and 338: 



Inflorescence ? Spike. 



Glumes ? 2. 



Outer palet ? 1. 



Inner palet ? 1. 



Lodicules ? 2. 



Stamens ? 3. 



Styles ? 2. 



Answer these questions in regard to the heads of 

 barley and rye. Compare the culm* and leaves of 

 these plants with those of wheat. 



Compare a plant of Indian-corn, when in blossom, 

 with the following description : $ flowers in a ter- 

 minal panicle of racemes known as the tassel ; spike- 

 lets two-flowered ; glumes herbaceous, palets membra- 

 nous ; anthers three, linear. ? flowers in an axillary 

 spike, partially imbedded in the rachis, known as the 

 cob, the bracts forming its spathe being the husks ; 

 lower flower of each spikelet consisting of two palets, 

 abortive; glume broad, thick, membranous, obtuse; 

 styles, very long, filiform, exserted and pendulous, 



* Oulm : a straw ; the stem of grasses and sedges. 



