IX] 



' SEEDS 



155 



the other longer and sharply bent, inserted about the 

 middle. 



Hierochloe, a rare northern grass, also comes here. 



AA Glumes connate below, hairy on the keels. 

 Alopecurus pratensis. 

 A. 



A. agrestis. 



Alopecurus is very characteristic, and should be carefully 

 examined as a type. A. pratensis is a valuable grass and said 



Fig. 68. Alopecurus pratensis. a, " seed," nat. size, and 6, c, ditto, x8; 

 d, caryopsis, x 7. The "seed" here consists of the two glumes, 

 connate below and hairy on the keel and ribs, including the 

 caryopsis enveloped in a single palea with a dorsal awn. Note 

 remains of stigma in d. Nobbe. 



to be often adulterated with the undesirable A. agrestis, Holcus, &c. 

 Arrhenatherum and Avena are easily distinguished by the basal 

 hairs, rachilla, &c. 



