AmAp°rii;'S6arm'}  Materia  Medica  of  the  Mexican  Pharmacopoeia.  169 
Yerba  del  alacran,  Plumbago  scandens,  Lin.;  Plumbaginacese ;  in 
hot  and  moist  localities.  The  leaves,  externally  applied,  are  caustic, 
and  taken  internally,  emetic,  dangerous.  The  root  is  caustic  and 
purgative. 
Yerba  del  angel,  Enpatorium  Collinii,  De  Cand.,  E.  sanctum, 
Flor.  Mex.  ined.;  in  the  mountains  of  Guadalupe  Hidalgo.  The 
leave?  are  popularly  used  in  atonic  diarrhoea  and  as  an  antiperiodic, 
and  are  fraudulently  used  in  the  manufacture  of  beer. 
Yerba  de  las  animas,  Helenium  autumnale,  Lin.  The  flowers  and 
fruit  are  errhine,  and  have  been  used  as  a  substitute  for  arnica.  (See 
also  Amer.  Jour.  Phar.,  1872,  pp.  308,  522,  and  1874,  p.  221.) 
The  same  common  name  is  also  given  to  Ipomoea  orizabensis,  Ledanois. 
Yerba  del  burro  is  an  undetermined  species  of  Spigelia,  the  leaves 
and  seeds  of  which  are  poisonous. 
Yerba  del  cancer,  Lythrum  alatum,  Pursh,  L.  vulnerarium,  Schranh, 
L.  lanceolatum,  Elliot,  and  L.  album,  Kunth  (Eythracese) ;  also 
Gornphrena  procumbens,  Fl.  Mex.  ined.  (Amaranthacese).  The  leaves 
of  these  plants,  in  cataplasms  and  in  decoction,  are  vulnerary  and  are 
used  in  cancerous  ulcers. 
Yerba  del  carbonero,  Baccharis  Alamani,  De  Cand.,  B.  multiflora, 
Humboldt  et  Bonpland,  B.  jalapensis,  H.  B.,  B.  heterophylla,  H.  B., 
and  other  indigenous  species  of  Baccharis  are  diaphoretic,  the  infusion 
of  the  leaves  being  popularly  used  for  the  cure  of  catarrhs. 
Yerba  del  clavo,  Juliana  caryophyllata.  La  Llave  ;  Zygophyllacese ; 
in  Tlalpxm,  etc.    The  infusion  of  the  leaves  is  antispasmodic. 
Yerba  de  la  cucaracha,  a  species  of  Echites ;  in  Cuernavaca.  The 
powder  of  the  leaves  and  stem,  mixed  with  sugar,  is  effectual  for  de- 
stroying cockroaches. 
Yerba  del  cura,  Ternstroemia  aitamirania,  Schiede;  in  hot  and  damp 
regions.  Baths  made  from  the  leaves  are  used  against  rheumatism 
and  gout. 
Yerba  de  la  doncella,  Begonia  gracilis,  Kunth,  also  B.  tuberosa  FL 
Mex.  ined.,  Begoniacese.    The  root  is  emetic  and  cathartic. 
Yerba  dulce,  Lippia  graveolens,  Kunth,  and  L.  dulcis,  Treviranus; 
Verbenacese.  The  infusion  is  demulcent,  pectoral  and  emmenagogue. 
(See  also  Amer.  Jour.  Phar.,  1885,  p.  333.) 
Yerba  de  la  golondrina,  Euphorbia  maculata,  I/in.;  in  the  Mexi- 
can valley,  also  in  the  United  States.  The  juice  is  used  for  remov- 
ing spots  from  the  cornea,  and  the  decoction  as  a  lotion  for  skin  dis- 
