524 



MANUAL OF POISONOUS PLANTS 



grass, madder, rue, and orchids, in such composites as Trilisa, in the root- 

 stock of Vitis sessilifolia and in Prunus Mahaleb. It is most easily detected 

 when the plant begins to wilt or after it is dead. Pseudocumarin C 7 H 4 O 2 ,, 

 is like the odorous substance found in Coronilla scorpioides. The seeds 

 of Mucuna giganteum and of M. pruriens are used for various purposes as 

 watch charms, or as other ornaments. 



Some species of the family which contain a good fiber are applied in weaving 

 cloth. A species of Crotalaria, C. juncea is cultivated in India for its tough 

 fiber, and is used for making ropes and bags. Sesbania aculeata, a branched 

 annual, is also cultivated for its fiber. The stems of Shola (Aeschynomene 

 aspera) native to India are used for making hats. Blue indigo dyes come from 

 Indigofera Anil of the West Indies. The Genista tinctoria or Dyers' Broom 



Fig. 284. Hairy Vetch (Vicia viilosa). Cultivated as a forage 

 plant. (U. S. Dept. Agr.) 



