104  Plants  Used  as  Insecticides.  {^eJuary.^QiT' 
Sideroxylon  borbonicum  A.  DC.    Sapotacece.    Synonym :  Side- 
roxylon  Inerme  L. 
Listed  by  Greshoff  as  an  insecticide. 
Solanum  auriculatium  Ait.  Solanaceoe. 
A  decoction  of  the  berries  is  used  as  an  insecticide.  (Greshoff, 
I9I3-) 
Solanum  carolinense  L.,  Solanum  Cornutum.  Horse  Nettle. 
Eastern  U.  S. 
Riley  found  the  decoction  of  this  ineffective  against  cotton  worms 
(Aletia) . 
Sophora  flavescens  Ait.  Leguminosce. 
A  decoction  of  the  stems  and  leaves  is  used  in  Japan  as  an  insec- 
ticide.   (Greshoff,  1913.) 
Sophora  Griffithii  Stocks.  Synonym:  Keyserlingia  Griffithii 
Boiss. 
The  seed  is  used  powdered  and  mixed  with  oil  to  kill  lice  in  the 
hair.    (Burkill,  quoted  by  Greshoff,  191 3.) 
Synandrospadin  vermitoxicus  Engl.  Aracew. 
The  poisonous  bulbs  serve  for  the  destruction  of  injurious  in- 
sects.   (Engler,  quoted  by  Greshoff.) 
Tagetes  glandulifera  Schranck.    Composite?.    South  America. 
This  vigorous  annual  plant  is  said  by  Dr.  Prentice  to  be  pulci- 
fugous.    (von  Mueller.) 
Tamus  communis  L.   Dioscoreaceoz.    Black  Briony.  Europe. 
The  powdered  root  has  been  recommended  to  destroy  lice  in  chil- 
dren's heads.    (Dujardin  Beaumetz,  quoted  by  Greshoff.) 
Tanacetum  vulgare  L.  Composites.  Synonyms :  Chrysanthemum 
Tanacetum  Karsch,  Pyrethrum  Tanacetum  DC.  Tansy.  Europe 
and  northern  Asia,  cult,  and  nat.  in  U.  S. 
The  flowers  of  Tansy  are  also  said  to  have  a  stupefying  effect 
on  insects.  (Simmonds,  Am.  J:  Ph.,  4th  series,  Vol.  21,  April,  1891, 
p.  202.) 
The  alcoholic  extract  and  infusion  were  without  effect  on  cotton 
worms  (Aletia).  (Riley.) 
An  action,  similar  to  that  of  Persian  insect  powder  is  produced 
by  the  common  tansy,  which  is  sold  in  the  north  of  England  for 
