78 



THE TRUE GRASSES. 



of Good Hope, is an elegant ornamental grass, especially 

 for dry bouquets. 



65. (10) Oplismenus Beau v. (Orthopogon Brown, He- 

 katerosaclme Steud.). Spikelets one-flowered, in small 

 groups or clusters along the branches of the panicle, 

 turned to one side ; first and second empty glumes 

 always, and the third frequently, awned. Broad-leaved, 

 delicate grasses. 



Species four, in the tropical and sub-tropical zone 

 (one species in South Europe). 



66. (11) Chsetium Nees (Berchtoldia Presl). Spikelets 

 lance-awl-shaped, pedicellate, in close panicles, one- 

 llowered, all three empty glumes awned. 



Species two ; one in Mexico, one in Cuba and Brazil. 



67. (12) Setaria Beauv. (Fig. 29). Spikelets 1-2 flow- 

 ered, ovate, in a close, cylin- 

 drical or bushy panicle. Glumes 

 awnless, first empty glume short. 

 Flowering glume and palea ob- 

 tuse, finally hard and shining 

 or transversely wrinkled. In- 

 volucral bristles usually pro- 

 jecting beyond the spikelets, 

 rough. 



About ten species, in all the 

 warmer countries of the world ; 

 some as weeds in the temperate 

 regions. S. glauca Beauv. (Fig. 

 29), with numerous bristles under 

 each spikelet, and flowering 

 glume with strong transverse 

 wrinkles, is cosmopolitan. S. 

 viridis Beauv., with 2-3 bristles 

 under each spikelet, and flower- 

 ing glume indistinctly transverse- 

 wrinkled, is widespread, and is 

 probably the original form of S. 

 Hungarian grass, 

 which is distinguished only by 

 its larger panicles and thicker and larger spikelets which 



Fig. 29.— Setaria glauca Beauv 



£: f , L ' ?P« wi xT h in ,T olu £ re of Italica Beauv. 



bristles. (After Nees, Gen. Germ., 

 I. 22.) 



