558         Conservation  and  Cultivation  of  Plants.      { ABeCJemberP iff" 
which  I  received  some  years  ago  from  Mr.  J.  L.  Lemberger  and 
the  late  Charles  A.  Heinitsh  in  both  Lebanon  County  and  Lan- 
caster County  in  Pennsylvania. 
According  to  Mr.  A.  M.  Todd,  peppermint  has  been  successfully 
cultivated  in  Wayne  County,  N.  Y.,  and  Ohio,  but  at  the  present, 
time  the  great  crop  from  cultivated  plants  comes  from  Michigan,  it 
being  estimated  that  40,000,000  pounds  of  peppermint  are  produced 
annually  in  Michigan  within  a  radius  of  75  miles  of  Kalamazoo. 
Valerian  has  been  grown  in  New  Hampshire,  Vermont  and  New 
York,  and  is  still  produced,  I  understand,  in  Vermont. 
The  plant  yielding  castor  oil  has  been  extensively  cultivated  in 
certain  portions  of  the  West  and  Middle  States  in  this  country. 
Flax  is  extensively  cultivated  in  the  United  States  ;  the  amount 
of  seed  annually  produced  is  about  15,000,000  bushels. 
The  recent  report  by  Mr.  A.  J.  McClatchie  on  "  The  Eucalypts 
Cultivated  in  the  United  States,"  shows  that  a  number  of  species  are 
extensively  cultivated  in  the  Southwestern  section. 
The  cultivation  of  ginseng  has  become  an  important  industry 
within  recent  years  in  various  parts  of  the  United  States  Several 
hundred  pounds  of  digitalis,  conium,  chamomile  and  a  less  quantity 
of  nettle  (JJttica  urens)  and  belladonna,  I  am  told,  are  annually  col- 
lected from  cultivated  plants  in  the  vicinity  of  Philadelphia. 
Cannabis  sativa,  Papaver  somniferum,  Cinnamomum  Camphor  a  and 
other  plants  have  been  successfully  cultivated  in  the  United  States. 
Many  persons  have  no  doubt  succeeded  as  I  have  in  growing 
the  following  medicinal  plants :  Digitalis  purpurea,  Atropa  Bella- 
donna, Inula  Helenium,  Sanguinaria  Canadensis,  Caulophyllum 
thalictroides,  Cimicifuga  racemosa,  Menispermum  Canadense,  Cornus 
Florida,  Liquidambar  styraciflua,  Sambucus  Canadensis,  Tanaceium 
vulgare,  Asarum  Canadense,  Aralia  nudicaidis,  Aspidium  margin  ale, 
Euo?tymus  Americana  and  Glecoma  hederacea. 
All  of  the  plants  (about  190)  enumerated  in  the  preceding  lists 
as  being  listed  by  nurserymen  will  probably  give  satisfactory 
results. 
THE  CONDITIONS  FOR  CULTIVATION. 
In  attempting  to  cultivate  medicinal  plants,  as  with  other  plants, 
it  is  important  to  study  the  requirements  of  individual  species,  and 
perhaps  the  safest  plan  would  be  to  produce  the  conditions  as  nearly 
as  possible  as  they  obtain  in  nature,  of  course  bearing  in  mind  the 
