344 



MANUAL OF POISONOUS PLANTS 



there is some relation existing between Pellagra in man and forage poisoning 

 in horses and cattle. Both are essentially produced by some toxic substance. 



In this connection, the bulletin on the Grand Traverse or Lake Shore 

 Disease, as investigated by C. D. Smith,* C. E. Marshall and Dr. Ward Giltner, 

 is interesting. 



2. Andropogon. (Royen.) L. Beard Grass 



Tall annual, or perennial grasses with spikelets in pai 

 of the slender rachis ; usually narrow leaves; terminal and 

 of them sterile, the other sessile, 1-flowered, and fertile 

 larger, coriaceous and nerved, the second acute ; stamens 1 



About ISO species widely distributed in tropical and 

 Some of the species of the Andropogon L are excellent 

 purposes. Quite a number of them produce valuable oils 

 obtained from Andropogon Schoenanthus, lemon grass oil 



rs upon each joint 

 axial racemes, one 



; lower glume the 



-3, grain free. 



temperate regions. 



grasses for forage 



like Pamorusa oil, 



from Andropogon 



Fig. 140. Johnson-grass (Andropogon halepensis). 

 a, spikelet; c and d, glumes; e, f, g, parts of the 

 flower. 



• Sp. Bull, Mich. Agr. Exp. Sta. 50: 10. 



