666 
Gleanings  in  Materia  Medica. 
f  Am.  Jour.  Pharm. 
\      Nov.,  1883. 
GLEANINGS  IN  MATEEIA  MEDICA. 
By  the  Editor. 
Grindelia  robusta,  Nuttall. — The  young  parts  of  the  cylindrical 
stem  are  covered  with  white,  soft  hairs.  The  leaves  are  thickish^ 
sessile,  more  or  less  amplexicaul,  spatulate-lanceolate  dentate,  and  pel- 
lucid-punctate. The  secondary  nerves  are  sparingly  branched,  and 
at  some  distance  from  the  margin  form  slings.  The  flower  heads 
terminate  the  branches.  The  involucre  consists  of  several  rows  of 
narrow  spatulate,  smooth,  sharp-edged  scales,  which  are  curved  back 
at  the  apex  and  are  covered  with  a  brown  glutinous  mass.  The  recep- 
tacle is  somewhat  convex  ;  the  florets  are  tubular,  yellow  and  herma- 
phrodite. 
The  resinous  covering  of  the  leaves  is  secreted  by  the  glandular 
Grindelia  robusta;  transverse  section  Scaly  trichoma, 'a 
through  upper  surface  of  leaf,  250  diam.        from  above,  6  section, 
400  diam. 
hairs,  which  are  always  simple,  frequently  with  a  double  row^of  cells^ 
and  occasionally  parenchymatic ;  the  terminal  gland  is  four-to  several- 
celled.  Similar  but  pointed  hairs  are  likewise  observed.  The  meso- 
phyll  is  a  loose  tissue  with  indistinct  palissade  layer,  supported  by 
thicker-walled  cell-rows,  which  extend  transversely  through  the  leaf. 
The  thin-walled  cells  contain  much  tannin. 
Quite  characteristic  trichomes  are  found  upon  the  involucral  scales 
in  depressions  near  the  recurved  apex,  and  consist  of  a  mass  of  cells 
without  a  stipe. — J".  Moeller,  in  Phar.  Centralhalle,  1883,  No.  19. 
Camellia  oleifera^  s.  Cam.  drupifera,  Hooker. — Hugh  McCallum 
