168      Materia  Medico,  of  the  Mexican  Pharmacopoeia.  {^m^;  g^arm- 
Unguentum  Diachylon. — From  the  large  number  of  formulas  for 
ointments  containing  lanolin  as  the  base,  which  have  been  published 
in  German  journals,  the  following  for  diachylon  ointment  are  selected 
as  examples: 
1 .  Lead  plaster,  50 ;  olive  oil,  20 ;  lanolin,  30.  Mix. 
2.  Lead  plaster,  45 ;  lanolin,  45;  lard,  10.  Mix. 
MATERIA  MEDICA  OF  THE  NEW  MEXICAN 
PHARMACOPOEIA. 
By  the  Editor. 
(Concluded  from  page  127.) 
Trompetilla  is  the  name  given  to  Bouvardia  angustifolia,  B.  hir- 
tella,  B.  Jacqumi,  Kunth,  and  other  indigenous  species  of  Bouvardia 
(Rubiacese).  The  decoction  of  the  leaves  is  popularly  believed  to  be 
a  cure  for  hydrophobia  ;  but  this  property  has  not  been  confirmed  by 
clinical  observation.    (See  also  Amer.  Jour.  Phar.,  1874,  p.  51.) 
Valeriana  de  Mexico,  Valeriana  mexicana,  De  Cand.;  Valeriana- 
ceae ;  in  the  Mexican  valley.  The  root  is  met  with  in  sections  or 
fleshy  disks,  about  4  Cai.  or  more  in  diameter,  or  iu  voluminous 
pieces ;  externally  yellowish  brown,  internally  yellowish ;  odor  strong, 
unpleasant ;  taste  bitter,  somewhat  acrid.  It  contains  sufficient  vale- 
rianic acid  to  be  economically  prepared  from  the  root,  which  is  used 
as  a  substitute  for  the  European  valerian  in  doses  of  1  to  5  g-m. 
Venenillo,  Asclepias  linearis,  Cavanilles;  Asclepiadaceae ;  in  the 
Mexican  valley.  The  milk  juice  is  a  violent  and  dangerous  cathar- 
tic. The  seed  hairs,  impregnated  with  a  solution  of  ferric  chloride 
and  well  dried,  are  used  as  a  hemostatic. 
Violeta  del  pais,  Sid  a  triloba,  Ca  vanilles,  Malvaceae.  The  flowers 
are  emollient. 
Yedra  (Hiedra)  terrestre.  This  name  belongs  properly  to  the 
European  Glechoma  hederacea,  Lin,;  but  in  Mexico  is  also  applied  to 
the  following  plants,  having  very  different  properties :  Pharbitis 
violacea,  Boj.  (manto  de  la  Virgen),  Hydrocotyle  americana,  Lin. 
(sombrerillo  de  agua),  Coboea  scandens,  Cav.  (hiedra  niorada),  and 
more  commonly  to  Sida  triloba,  Cav.,  and  a  species  of  Malva. 
Yerbabuena  is  Mentha  viridis,  Lin. 
Yerbabuena  piperita,  Mentha  piperita,  Lin.  Analogous  properties 
are  contained  in  Hedeoma  piperita,  Bentham,  which  is  frequent  in  the 
Mexican  valley. 
