WASTE PLACES, ETC. 



137 



B. jnollis. The panicle is oblong-, blunt, erect, 

 rigid. The spikelets are more or less compound, 

 in dense, interrupted clusters. The upper palea is 

 split to the base. The plant is 2-4 ft. high, flower- 

 ing in June and July, and is a herbaceous annual 

 or biennial. 



Rye Grass (Lolium perenne, L.). The habitat of 

 this grass is pastures, waste places. The plant is 

 dark-green. There are leafy, barren shoots. The 

 root is fibrous. The stems are bent below, ascend- 

 ing, hairless, flattened. The leaves are flat, the 

 edges of the young leaves simply folded. The 



edges and upper surface are rough. The sheaths 

 are smooth, flattened. There is a short ligule. 

 The spike is simple (6-1 1 flowered), rigid, stout or 

 slender, and 3-4 flowered. The rachis is smooth, 

 channelled one side. The spikelets are smooth, 

 shining. The empty glumes are shorter than the 

 spikelet, ribbed, linear-lanceolate. The flowering 

 glumes are linear to oblong, round, blunt (or 

 awned), ribbed. The glume equals the lowest 

 flower. The lower palea is awnless. The plant 

 is 1-2 ft. high, flowering from June to October, 

 and is a perennial. 



