A°»-/^«^^--^Pgharm. I     ^lateHci  MecliGa  of  the  ^lexiean  Fharmacopceia,  387 
It  is  emetic  and  purgative ;  dose,  0*5  to  2*0  Gm.,  the  extract  0*3  to 
1-0  Gm. 
Calabaza,  Cucurbita  maxima,  Duchesne,  and  C.  Pepo,  Lin.  The 
flowers  and  fruit  are  alimentary ;  the  seeds,  particukirly  those  from 
the  hot  districts  are  t?enifuge  in  the  dose  of  60  Gm. 
Calaguala  is  the  name  given  to  the  rhizomes  of  different  species  of 
ferns,  principally  Polypodium  aureum,  Lin.,  having  diaphoretic  and 
pectoral  properties,  and  used  in  decoction  and  powder ;  dose,  2  to 
4  Gm. 
Calancapatle,  Solidago  montana,  Floi-.  Mex.  ined. ;  the  powder  as  a 
vulnerary  in  atonic  ulcers ;  the  decoction  in  lotions.  Similar  uses  are 
made  of  Doronicum  glutinosum,  Willd.,  and  Grindelia  glutinosa, 
Dunal,  known  as  Calancapatle  de  Puebla. 
Camote,  Batatas  edulis,  Choisy ;  Convolvulacefe.  The  leaves  are 
used  for  fodder,  the  roots  as  food,  and  the  starch  as  a  substitute  for 
arrowroot.  The  tubers  of  Oncus  esculentus,  Loureiro,  Dioscoreace^e, 
are  known  as  Camote  the  cerro,  and  on  account  of  the  large  quantity 
of  starch  are  used  for  food. 
Canchalagua,  Erythrsea  stricta,  Schiede,  E.  chilensis,  Persoon,  E. 
jorullensis,  Kunth;  Gentianacese.  Stem  slender;  leaves  oblong-linear, 
rather  obtuse ;  inflorescence  in  dichotomous  pannicles  ;  corolla-lobes  4 
or  5,  elliptic-oblong;  stigma  cleft;  capsule  two-celled.  Among  other 
constituents  Leboeuf  (1868)  found  9  per  cent,  of  bitter  principle.  The 
flowering  tops  are.  used  as  a  bitter  tonic  and  stomachic;  dose,  15  to 
30  Gm.  in  500  Gm.  infusion. 
Cantaridas.  A  number  of  Mexican  beetles  are  employed  as  substi- 
tutes for  cantharides,  of  which  the  following  are  the  most  important : 
Triodons  Barranci,  Duges,  M.  tridentata,  Lin.  The  male  is  18  mm. 
long  and  7  mm.  broad;  the  female  44  mm.  long  and  10  mm.  broad; 
color  black ;  jaws  prominent,  on  the  inside  with  three  strong  teeth ; 
antennse  moderate,  the  second  joint  very  short,  the  eleventh  elongated 
and  thin  at  the  extremity;  thorax  small,  narrower  than  the  elytra  and 
head ;  wing  cases  covering  the  greater  portion  of  the  abdomen  of  the 
male,  and  scarcely  the  second  abdominal  ring  of  the  female ;  abdomen 
voluminous,  soft ;  legs  long  and  stout;  claws  yellowish,  bifid.  The 
insect  is  collected  from  June  to  September. 
Cantharis  eucera,  Chev.  Length  30  to  18  mm.,  width  9  to  4  mm.; 
head  black,  the  upper  half  red  ;  antennae  black,  moniliform  in  the 
female,  the  fourth  to  sixth  joints  trigonal  and  somewhat  dilated ;  tho- 
