94 



Botanical Section 



[PT i 



apex ; its edges finely serrated, ribless above, and strongly keeled 

 throughout its length below. Ligule long, white, and membranous. 

 Auricles absent. Abundant throughout Britain. 



Fig. 90. Two aquatic grasses. Olyceria aquatica, Sm. Fig. 01. Two sea-coast 



(left). Digraphis arundinacea, Trin. (right). grasses, a. Spike of Ely- 



About nat. size. mus arenarius. b. Spike- 



like inflorescence of 

 Psamma arenaria. About 

 nat. size. 



Flowers late in May or early in June. Culms from two to 

 three feet high, the upper sheaths and blades of the culm very 

 harsh to the touch. The panicle consists of clusters of spikelets 

 arranged on contracted or shortened branches, thus giving it a 

 close, dense, heavy appearance. Spikelets three to five flowered. 



