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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 pairs upon each joint 

 of the slender rachis; usually narrow leaves; terminal and axial racemes, one 

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

 larger, coriaceous and nerved, the second acute; stamens 1-3, grain free. 



About 150 species widely distributed in tropical and temperate regions. 

 Some of the species of the Andropogon L. are excellent grasses for forage 

 purposes. Quite a number of them produce valuable oils like Pamorusa oil, 

 obtained from Andropogon Schoenanthus, lemon grass 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. 



