MUSTARD FAMILY. 105 
owing to the broad wings which give them a total width 
of about one-half inch. 
The flattened, dark brown seeds are about one-twelfth 
of an inch in diameter, with five or six deep, loop-like 
grooves arising from the notched place of attachment. 
They are pungently bitter. 
WORMSEED MUSTARD—Evysimum cheiranthoides L. 
This plant, like Wild Mustard, is harmful only when 
its seeds are included in ground feeds. The seeds, which 
> 
vy ‘ 
ee 
7) 
Fig. 25.—Seeds of Worimseed Mustard—Lrysimun: cheiranthoides. 
Five times natural size. 
contain a pungent oil, are intensely bitter, and unless an 
animal is very hungry, it will refuse feed containing any 
appreciable amount of them. One sample of shorts sent 
in for examination was accompanied by a statement that 
two neighbours had bought feed from the same lot. 
Each found all his pigs dead a few hours after the first 
feeding. An analysis showed a considerable proportion 
of Wormseed Mustard, there being 1.7% by weight of 
whole seeds present. This aroused suspicion, and feeding 
experiments made since by Dr. Hadwen, though not com- 
plete, have practically demonstrated the poisonous char- 
acter of the seed. 
