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MALAMBO  BARK.  161 
The  last  santonin  had  been  colored  yellow  by  sun  light ;  the 
solution  was  likewise  of  a  yellow  color,  but  lightened  gradually, 
and  was  at  last  colorless.  If  the  chloroform  is  now  evaporated 
at  a  very  moderate  heat,  the  santonin  crystallizes  in  colorless 
tablets ;  if  the  heat  was  coo  high,  the  solution  assumes  again  a 
yellowish  color,  and  the  santonin  is  separated  with  the  same 
color. 
Sulphate  of  quinia  being  insoluble  in  chloroform,  any  sulphate 
of  cinchonia  with  which  it  may  be  coaxaminated,  may  be  sepa- 
rated by  that  liquid. — Archiv  d.  Pharm.  1859,  Nov.  151,  152. 
J.  M.  M. 
MALAMBO  BARK. 
The  origin  of  this  aromatic  bark,  which  has  been  a  disputed 
question  ever  since  its  introduction  to  Europe  by  Bonpland  in 
the  year  1814,  has  at  length  been  satisfactorily  determined  by 
Mr.  H.  Karsten,  of  Berlin.  A  residence  of  twelve  years  in  the 
northern  countries  of  South  America  has  enabled  Mr.  Karsten 
to  make  many  interesting  and  important  observations  on  the 
vegetation  of  that  botanically  rich  region,  the  result  of  which 
observations  he  is  now  communicating  to  the  scientific  world  in 
a  magnificently  illustrated  work,  under  the  title  of  Florce  Colum- 
bia Terrarumque  adjacentium  Specimina  selecta.  From  this 
work,  in  which  the  Malambo  tree  is  beautifully  figured,  we  ex- 
tract the  following  description  and  remarks  : — 
Croton  Malambo  Krst.    Euphorbiacece  R.  Br. 
Character  differential^. 
Arbor  foliis  ovalibus,  crenato-serratis,  glabris  basi  biet  in  crenaturis 
uni-glandulosis. 
Character  naturalis. 
Arbor  duodecim  vel  quindecim-pedalis  in  littoribus  australibus  maris 
caribsei  habitans,  trunco  recto  quadripedali,  cortice  suberoso  flavescenti 
odore  camphoreo-aromatico  prsedito,  tecto-  cacumine  ramoso  ellipsoideo  ; 
foliis  alternis,  glabris  hircino-odoris  glandulis  oleiferis,  pellucido-punctatis, 
bistipulatis, — stipulis  minutis  linearibus,  acutissimis,  caducis, — longe  petio- 
latis,  petiolis  1 — 2£  pollicaribus,  lamina  ovali  basi  rotundatd  excisa,  snbtus 
utrinque  glandulam  minutam,  patelliformem  gerentibus,  margine  crenato, 
in  crenaturis  glandulam  illis  similem  fovente,  4 — 5  pollices  longa  2 — 2j 
pollices  lata. — Inflorescentia  terminalis  racemosa,  monoica.  Elores  bractea 
minuta,  caduca  sustentati,  feminei  inferiores  3 — 8,  longe  pedunculati, 
majoren.    Calyx  campanulatus,  quinquepartitus  persistens,  lobis  lanceo- 
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