96 
Plants  Used  as  Insecticides. 
/Am.  Tour.  Pharm. 
<■    February,  19 19. 
"  Tomato  foliage  may  be  placed  round  fruit  trees,  like  the  equally 
poisonous  potato  leaves,  to  prevent  the  access  of  insects,  and  an  in- 
fusion of  the  herb  serves  also  as  an  insecticide  for  syringing,  as 
first  adopted  by  Mr.  Sircy."    (von  Mueller.) 
Lycopodium   complanatum    L.    Lycopodiacece.    Ground  Pine. 
Europe,  Asia  and  North  America. 
The  decoction  kills  lice.  (Williams,  Trans.  Am.  Med.  Assoc., 
Vol.  2,  1849,  P-  924-) 
Lycopodium  Selago  L.   Fir  Moss ;  Tree  Moss. 
Listed  by  Greshoff  as  an  insecticide. 
Lysimachia  Nummularia  L.    Primulacece.    Creeping  Loosetrife. 
Europe,  nat.  in  U.  S. 
The  leaves  and  flowers,  steeped  in  oil,  have  the  power  of  destroy- 
ing insects  and  worms  which  infest  granaries.  (Porcher.) 
Macleya  cordata  (Willd.)  R.  Br.   Papaveracece.    Synonym:  Boc- 
conia  cordata  Willd.   Tree  Celandine.  Japan. 
The  decoction  is  used  in  Japan  as  an  insecticide.  (Greshoff.) 
Marrubium  vulgare  L.   Labiates.   Horehound.   Europe  and  Asia, 
nat.  in  U.  S. 
In  experiments  with  insecticides  on  the  cotton  worm  (Aletia) 
Riley  reports  as  follows  on  horehound :  "  This  decoction  emits  a  very 
powerful  and  disagreeable  stench,  which  I  could  still  smell  on  the 
cotton  plants  two  days  after  application,  but  it  had  no  effect  what- 
ever on  the  worms,  nor  did  it  prevent  the  moths  from  ovipositing. 
The  alcoholic  extract  did  not  possess  this  unpleasant  smell,  and  had 
likewise  no  effect  whatever." 
Matricaria  Chamomilla  L.    Composite?.    Synonyms :  Chrysan- 
themum Chamomillla  Bern..  Chamomilla  vulgaris  S.  F.  Gray, 
Chamomilla  officinalis  Koch.    German  Chamomile.    Europe  and 
Asia,  nat.  in  U.  S. 
Flowers  =  Matricaria  U.  S.  P.  IX. 
In  Portugal  it  is  planted  under  fruit  trees  for  insecticidal  pur- 
poses,   (von  Mueller.) 
Flower  heads  of  common  chamomile  have  an  action  similar  to 
that  of  genuine  Persian  insect  powder  (Pyrethrum  roseum  and  P. 
carneum).    (Schenck,  Canstatt's  Jahresbericht,  Band  V,  1859,  p. 
no 
