102 
Plants  Used  as  Insecticides.       /'Am.  jour.  Pharm. 
rebruary,  19 19. 
According  to  Browne  (Rept.  U.  S.  Com.  Patents,  1857,  Agri- 
culture) Persian  insect  powder  is  produced  from  this  species  as  well 
as  from  P.  roseum  and  P.  carneum. 
Rhinanthus  Crista-galli  L.    Scrophulariacew.    Synonym:  Rhi- 
nanthus  minor  Ehr.  (Kew).    Rattle;  Rattle-box.  Northern 
Europe,  Asia  and  North  America. 
Plant  insecticide.  (Lyons.) 
Rhus  Coriaria  L.   Anacardiacew.   Tanner's  Sumac.  Europe. 
Carves  records  that  this  plant  when  in  proximity  of  vines  in- 
fested by  Phylloxera  vastatrix,  destroys  this  insect.  (Sorauer, 
quoted  by  von  Mueller.) 
Ricinus  communis  L.  Euphorbiacece .  Synonyms :  Ricinus  vul- 
garis Mill.,  Ricinus  medicus  Forsk.,  Cataputia  minor  Ludw. 
Castor-oil  Plant.    Southern  Asia. 
Castor-oil  plants  have  been  found  efficacious  in  freeing  rooms 
from  insect  life,  the  leaves  of  the  plant  containing  a  substance  which 
is  fatal  to  flies  and  other  insects.  (Chemist  &  Druggist,  Vol.  29, 
Sept.  25,  1886,  p.  410.) 
It  also  helps  to  drive  mosquitoes  away,    (von  Mueller.) 
Rosmarinus  officinalis  L.  Labiates.  Rosemary.  Mediterranean 
region. 
Branches  of  this  shrub  will  keep  off  moths  from  wearing  ap- 
parel packed  away,    (von  Mueller.) 
Roylea  elegans  Wall.  Labiates. 
The  leaves  used  as  an  insecticide.    (Greshoff,  1913.) 
Rumex  sp.   Polygonaceee.   Dock  Weed. 
An  alcoholic  extract  was  without  effect  upon  cotton  worms 
(Aletia).  (Riley.) 
Ruta  graveolens  L.   Rutaceee.   Rue.   Southern  Europe. 
A  strong  decoction  obtained  by  macerating  the  leaves  of  the 
plant  in  soap  and  water,  is  stated  by  Forney  to  be  a  successful  rem- 
edy for  American  blight.  (Larbaletrier,  Year-Book  of  Pharmacy, 
1902,  p.  276.) 
Samadera  indica  (Gaertn.)  Simarubacee?.     Synonyms:  Locandi 
indica  Gaertn.,  Samandera  pentapetala  C.  Don.,  Niota  penta- 
petalla  Lam.,  Niota  Commersoni  Pers. 
Hindustan.    Bark  — Niepa  bark;  Niota  bark. 
Listed  by  Greshoff  as  an  insecticide. 
