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MANUAL OF POISONOUS PLANTS 



Fig. 256c. False Flax (Camel- 

 ina sativa). Seeds become mucilag- 

 inous on addition of water. (After 

 Hochstein). 



Fig. 257. Small Pepper-grass (Lepidium afetalum). 

 Causes sinapism. (Charlotte M. King.) 





Lepidium virginicum L. Large Pepper Grass 



Pod circular or oval with a little notch at the upper end; seeds light brown, 

 elongated, with a prominent ridge on one side, on the addition of water they 

 become mucilaginous ; cotyledons accumbent. 



Lepidium apetalum Willd. Small Pepper Grass 



Seeds light brown, elongated, with a prominent ridge on one side. Seeds 

 become mucilaginous when moistened with water. Cotyledons incumbent. 

 Distribution. In nearly all parts of the United States. 

 Poisonous properties. Pepper grass produces counter-irritation. 



7. Thlaspi L. Field Pennycress 



Low plants with undivided root leaves, stem leaves arrow-shaped and clasp- 

 ing; flowers small, whitish or purplish; pod orbicular, obovate or obcordate; 

 seeds 2-8 in each cell; cotyledons, accumbent. 



