368 



MANUAL OF POISONOUS PLANTS 



Fig. 155. Wild Barley (Hordeum 

 jubatum.) Produces mechanical in- 

 juries to animals. (U. S. Dept. 

 Agrl.) 



Fig. 156. Common Little Barley (Hordeum 

 secalinum). Causes mechanical injuries. (Charlotte 

 M. King.) 



arranged in spikelets, 1 or 2 in the axil of each glume, spikelets, 1- many- 

 flowered; scales 2-ranked, or spirally imbricated, persistent, or deciduous; peri- 

 anth free, composed of bristles, scales or rarely wanting; anthers 2-celled; ovary 

 1 -celled, ovule 1, erect style 2 or 3-cleft; endosperms mealy; embryo minute. 

 A large family of comparatively few genera (65) and 3,000 species of wide 

 distribution. Carex is found in colder regions, while Cyperus is in warmer 



