26 
Plants  Used  as  Insecticides. 
f  Am.  Jour.  Pharm. 
^    January,  19 19. 
commercial  value  at  present,  and  many  are  troublesome  or  even 
dangerous  weeds.  If  these  could  be  utilized  for  insecticidal  pur- 
poses a  market  would  be  found  for  material  that  is  at  present  value- 
less or  even  the  cause  of  direct  loss,  e.  g.,  from  stock  poisoning. 
It  is  believed  that  some  of  the  plants  listed  may  be  found  to  be 
of  commercial  value  as  insecticides. 
These  references  have  been  collected  from  many  sources,  but 
most  of  them  are  taken  from  the  following  works : 
Greshoft,  M.,  "  Mededeelingen  mit  'S  Lands  Plantentuin  XXIX" 
Tweede  gedeelte  van  de  Beschrijving  der  Giftige  en  bedwelmende 
plantcn  bij  de  Vischvangst  in  begruik"    Batavia,  1900. 
Greshoff,  M.,  "  Mededeelingen  uitgaande  van  het  Department  van 
Landbouw  No.  17,  Derde  gedeelte  (Supplement)  von  de  Besch- 
rijving der  giftige  en  bedwelmende  planten  bij  de  vischvangst  in 
gebruik."    Batavia,  1913. 
Kalbruner,  Hermann,  "  Ueber  die  Insektenvertilgende  Wirkung 
einiger  Pyrethrumarten,"  Zeitschrift  des  aUgenieinen  oesterreich- 
ischen  Apothekervereines,  vol.  12,  no.  29,  October  10,  1874.  pp. 
542-543. 
Lyons,  A.  B.,  "  Plant  Names,  Scientific  and  Popular,"  2d  ed.,  De- 
troit, 1907. 
von  Mueller,  Baron,  Ferd,  "  Select  Extra-Tropical  Plants,"  9th  ed., 
Melbourne.  1895. 
Pammel,  L.  H.,  "A  Manual  of  Poisonous  Plants,"  Part  I,  1910; 
Part  II,  191 1,  Cedar  Rapids,  Iowa. 
Porcher,  Francis  Peyre,  "  Resources  of  the  Southern  Fields  and 
Forests,"  rev.  ed.,  Charleston,  1869. 
Riley,  C.  V.,  Fourth  Report  of  the  U.  S.  Entomological  Commission, 
Washington,  1885. 
In  the  case  of  statements  obtained  from  other  sources,  the  full 
reference  is  given  immediately  following  the  statement. 
This  list  is  presented  as  a  preliminary  one  only,  but  it  seemed 
advisable  to  publish  it  at  the  present  time  in  order  that  tests  on  the 
insecticidal. properties  of  the  plants  might  not  be  delayed. 
It  is  realized  that  the  synonymy  and  classification  of  the  species 
as  to  family  will  not  satisfy  all  botanists.  Furthermore,  in  many 
cases  an  author  gives  both  the  common  name  and  the  scientific 
name  of  a  plant,  which  do  not  agree.  For  example  Riley  speaks 
of  Helenium  autumnale  and  H.  tetmifolium  as  dogfennel,  whereas 
dogfennel  is  Anthemis  Cotula  L.    In  such  cases  the  scientific  name 
