126 



Botanical Section 



[PT I 



rolled in the shoots, smooth, thin, long, narrow, limp and 

 ribless. Ligule very short or wanting. No auricles. 



Flowers about midsummer; the culms erect, from 18 inches 

 to 2 feet high. Panicle rather open, spreading, or slightly nodding. 

 Spikelets ovate, 2-5 flowered. Glumes almost equal, three- 

 nerved. 



Fig. 141. Panicles of Poa pratensis (left), and Poa trivialis (right). 



"Seeds" 2-3 mm. long. (Fig. 139.) Outer palea five-nerved (the 

 intermediate nerves indistinct), with membranous margins above, 

 and rather acutely pointed. The lower half of the central and 

 marginal nerves hairy, the other nerves without hairs. Rachilla 



