170      Materia  Medica  of  the  Mexican  Pharmacopoeia.  {^Aprif  fs86.rm* 
eases.  The  plant  is  sometimes  erroneously  substituted  for  Chelido- 
nium  majus,  Lin. 
Yerba  del  indio,  Aristolochia  foetida,  Kunth. — See  Amer.  Jour. 
Phar.  (1876),  p.  49,  and  (1886),  pp.  113  and  115. 
Yerba  mora;  Solanum  nigrum,  Lin.  Not  used  internally;  the 
decoction  in  fomentation  and  vaginal  injections. 
Yerba  de  la  mula,  Monnina  Ocampi,  Herrera,  Mendoza  et  Vittada; 
Polygalacese;  in  Huasteca,  etc.  The  leaves  are  commonly  regarded 
as  tonic,  and  the  fruit  is  used  for  dyeing  linen  violet-blue. 
Yerba  del  negro,  Malva  angustifolia,  Cavanilles.  The  plant  is 
emollient. 
Yerba  del  pastor,  Acalypha  prunifolia,  Kunth;  Euphorbincese; 
near  Puebla,  Mexico,  etc.    The  decoction  is  vulnerary. 
Yerba  del  polio,  Commelyna  tuberosa,  Kunth;  Commelynacese. 
The  juice,  leaves  and  stems  are  efficient  haemostatics.  The  extract  is 
given  in  pills,  or  from  1  to  6  gm.  dissolved  in  180  gm.  of  water;  for 
vaginal  injections  and  topical  application  4  to  8  gm.  of  the  extract 
are  used.  Tradescantia  erecta,  Cav.  T.  geniculata,  Jacquin  and  allied 
species  have  similar  properties  in  a  less  degree. 
Yerba  del  porrazo  or  del  golpe,  Oenothera  pumila,  Fl.  Mex.  ined. 
The  decoction  is  used  as  a  resolvent  in  contusions. 
Yerba  de  la  Puebla,  Senecio  canicida,  Fl.  Mex.  ined.;  Composite ; 
in  the  State  of  Puebla.  Roots  yellowish  white,  branched;  stem 
originating  from  a  bulb,  cylindric,  shaggy,  with  linear,  longitudinal 
violet  spots;  leaves  alternate,  deeply  pinnatifid;  inflorescence  corym- 
bose; heads  heterogamous,  yellow,  radiate;  akenes  cylindric,  not 
hairy.  Rio  de  la  Loxa  found  in  the  plant  a  poisonous  organic  acid, 
senecic  acid.  The  plant  has  been  recommended  as  antipsoric  and 
sudorific ;  it  has  tetanic  properties  and  has  been  used  in  epilepsy ;  in 
Puebla  it  is  used  for  killing  dogs. 
Yerba  de  San  Nicolas,  Ionidium  angustifolium,  Kunth,  Violaceae; 
in  Tamaulipas.  The  root  is  tortuous,  thin,  whitish-gray  or  yellowish, 
slightly  annulate,  somewhat  resembling  white  ipecac ;  meditullium  yel- 
lowish ;  inodorous;  taste  farinaceous,  afterward  acrid.  It  has,  among 
the  rural  population,  considerable  reputation  for  the  cure  of  dropsy. 
Yerba  de  Santa  Maria  de  Mexico  is  feverfew,  Matricaria  Parthe- 
nium,  Lin. 
Yerba  de  Santa  Maria  de  Tierradentro,  Tagetes  lucida,  Cavanilles, 
is  antiperiodic. 
