io6 
Plants  Used  as  Insecticides. 
f  Am.  Jour.  Pharm. 
*•    February,  1919. 
Veratrum  viride  Roehl.  not  Ait.,  N.  B.  Veratrum  album  Michx. 
=  V.  viride  Ait.,  Veratrnm  album  S.  Wats.  =  V.  calif ornicum 
Durande.    White  Hellebore.    Europe  and  Northern  Asia. 
Rhizome  and  rootlets  =  Veratrum  U.  S.  P.  VIII  in  part. 
The  powdered  rhizome  and  rootlets  constitute  the  hellebore  used 
as  an  insecticide. 
Veratrum  viride  Ait.  Synonyms :  Veratrum  album  var.  viride 
Baker,  Veratrum  album  Michx.  not  L.,  Melanthium  virens 
Thunb.,  Helonias  viride  Ker.,  not  V.  viride  Roehl.  American 
Hellebore.  North  America. 
Rhizome  and  rootlets  ==  Veratrum  U.  S.  P.  IX. 
Serves  like  other  Veratrums  also  as  an  insecticide,  (von  Muel- 
ler.) 
Verbascum  Thapsus  L.  Scrophulariacece.  Thapsus  Schraderi 
Opiz.,  V  erabascum  Schraderi  G.  Meyer.  Common  Mullein. 
Europe  and  Asia,  nat.  in  U.  S. 
The  alcoholic  extract  and  decoction  of  leaves  were  ineffective 
upon  cotton  worms  (Aletia).  (Riley.) 
Vernonia  anthelmintica  Willd.    Composite?.    East  Indies. 
Bruised  seeds  largely  employed  as  a  means  of  destroying  pedi- 
culi.    (Watt,  quoted  by  GreshofT.) 
Vernonia  noveboracensis  (L.)  Willd.  Synonyms:  Serratula 
noveboracensis  L.,  Behen  noveboracensis  Hill.  Iron-weed. 
Eastern  U.  S. 
The  alcoholic  extract  and  decoction  were  ineffective  against  cot- 
ton worms  (Aletia).  (Riley.) 
Vitex  Agnus-castus  L.  Verbenacew.  Chaste-tree.  Mediter- 
ranean region. 
Flies  are  believed  to  avoid  the  tree,  so  that  when  they  are  trouble- 
some, branches  are  hung  in  the  huts.  (Burkill,  quoted  by  Greshoff, 
I9r3-) 
Withania  somnifera  Dun.  Solanacecs. 
Used  as  an  insecticide.    (Burkill,  quoted  by  Greshoff,  1913.) 
Xanthium  strumarium  L.  Ambrosiacece.  Cocklebur.  Europe 
and  Asia,  nat.  in  U.  S. 
No  result  was  obtained  with  the  alcoholic  extract  and  decoction 
used  upon  cotton  worms  (Aletia).  (Riley.) 
