122 
So  lid  ago  Rugosa. 
( Am.  Jour.  Pharnj. 
\      March,  Js93. 
50LIDAG0  RUGOSA. 
By  William  P.  Oberhauser,  Ph.G. 
Contribution  from  the  Chemical  Laboratory  of  the  Philadelphia  College  of  Pharmacy,. 
Xo.  1 20. 
Very  little  has  been  written  about  the  members  of  this  genus, 
except  Solidago  odor  a  and  5.  Virga-aurca  ;  the  leaves  of  the  former 
were  at  one  time  officinal. 
Solidago  rugosa  grows  from  one  to  six  feet  high,  is  rough  and 
hair}*,  especially  the  leafy  stem.  The  plant  flowers  during  August 
and  September. 
A  quantity  of  the  plant  was  collected  by  myself,  during  the 
flowering  season,  and  after  careful  drying  it  was  submitted  to  analy- 
sis, with  the  following  results  : 
Per  Cent. 
Volatile  oil,   0*996 
Fixed  oil,   2 '2 10 
Wax,   0*906 
Caoutchouc,   I*33° 
Chlorophyll  and  resin,   4*244 
Mucilage,   1*900 
Dextrin,  10*200 
Sugar,   .  .  :   o"666 
Pectin,   0*640 
Calcium  oxalate,   o"i35 
Inulin,   0*960 
Pararabin,   .  .   1  "ooo 
Lignin,   4*690 
Incrusting  matter,   .  .  .  8*580 
Cellulin,  .  .  .  -  8*230 
Undetermined  extractive,    9"$95 
Tannin,  .  .   2*700 
Moisture,   97*o 
Ash,  -  19*050 
Loss,  11*958 
Total,   100  000 
A  careful  search  for  glucosides  and  alkaloids  in  the  alcoholic  and 
ethereai.  extracts  of  the  drug  failed  to  reveal  evidence  of  either. 
Considerable  quantities  of  the  volatile  oils  of  the  flowers  and  of 
the  leaves  were  obtained  separately  by  distilling  these  parts  of  the 
plant  with  water.  That  from  the  flowers  was  a  colorless  oil  having 
a  specific  gravity  of  0-8486  at  i;c  C.  The  oil  from  the  leaves  was 
straw-yellow  in  color  and  had  a  specific  gravity  of  0-8502  at  i;  =  C. 
