358  London  Botanic  Gardens.  {Amligust,PiSo6ml" 
of  the  U.S. P.;  Secale  cereale,  L.,  on  which  grows  the  ergot  of  the  pharmaco- 
poeias ;  Sola?ium  Dulcamira,  L.,  and  5.  nigrum,  L  ;  Spircea  Ulmaria,  L  , 
the  "  Ulniaire  "  or  "  Reine-des-pres  "  of  the  Codex  ;  Stachys  Betonica,  Benth., 
the  "  Wood  Betony  "  of  herbalists,  still  retained  in  the  Codex;  Tanacetum 
vulgare,  L. ;  Taraxacum  officinale,  Weber;  Teucrium  Chamcedrys  L  ,  the 
"Germandree  Chamcedrys  "  or  "  Petit  chene  "  of  the  Codex  ;  Tilia  platyphyllos, 
Scop.;  Trigonella  Fee num-gr cecum,  L,.;  Triticum  vulgare,  Vill.,  wheat; 
Valeriana  officinalis,  L. ;  Veratrum  album,  L.,  and  V.  viride,  Soland.;  Ver- 
bascum  Thapsus,  L.  ;  Verbena  officinalis,  L.,  a  worthless  drug  formerly  of 
great  repute,  and  still  official  in  the  Codex  ;  Vincetoxicum  officinale,  Moench, 
the  "  Asclepiade  "  or  "  Dompte-venin  "  of  the  Codex  ;  Viola  tricolor,  L.,  the 
"  Pensee  sauvage  "  of  the  Codex,  and  the  "  Stiefmutterchen"  of  the  Arznei- 
buch  ;  and  Zea  Mays,  L.,  whose  styles  and  stigmas  constitute  cornsilk,  or  the 
"Zea  "  of  the  U.S. P. 
The  Plant  Houses. — Chief  among  these  is  the  range  of  plant- 
houses  completed  in  1902,  and  situated  on  the  north  side  of  the 
garden  (See  Plates  XXVI  and  XXX).  This  type  of  range  is.  the 
one  that  has  been  found  most  suitable  for  educational  purposes,  and 
therefore  it  has  also  been  adopted  in  the  botanic  gardens  at  Cam- 
bridge and  Oxford.  There  are  three  houses  in  this  range,  a  stove, 
heated  to  65 0 — 700  F.,  an  intermediate  house,  heated  to  55 0 — 6o° 
F.,  and  a  cool  house  maintained  at  about  45 0 — 500  F.,  and  these  all 
open  into  a  lean-to  corridor  heated  to  the  intermediate  temperature, 
so  that  access  from  one  house  to  the  other  is  made  possible  without 
the  necessity  of  subjecting  the  plants  to  such  great  changes  of  tem- 
perature as  if  the  houses  only  communicated  with  the  outside  air. 
Various  kinds  of  plants  are  represented,  and  those  of  economic 
interest  are  distributed  among  the  others.  The  medicinal  plants  are 
not  numerous,  but  the  following  may  be  mentioned  : — 
In  Ihe  Stove. — Ilex  Paraguay en  sis,  Lamb.;  Myroxylon  toluiferum,  H.B.K., 
Zingiber  officinale,  Rose. 
In  the  Intermediate  House. — Adhatoda  Vasica,  Nees,  whose  fresh  and  dried 
leaves  constitute  the  "Adhatoda"  of  the  Indian  and  Colonial  Addendum  to 
theB.P.;  Anamirta  Cocculus,  W.  &  A.;  Bixa  Orellana,  L. ;  Canella  alba, 
Murr.;  Coffea  Arabica,  L. ;  Draccena  Draco,  L.;  Peumus  Boldus,  Molina; 
Phoenix  dactylifera,  L.;  Picrcena  excelsa,  Lindl. 
In  the  Greenhouse. — Agathis  australis,  Salisb.,  {Dammara  australis, 
Lamb.),  the*Kaurie  Pine,  from  which  is  obtained  a  resin  similar  to  copal  ;  Cin 
namomum  Camphora,  Nees  ;  Drimys  Winteri,  Forst. ;  Eucalyptus  globulus, 
Labill. ;  Melaleuca  sp.;  Rhamnus  Calif ornicus,  Bschsch.,  and  R.  Purshianus, 
DC. 
In  the  Corridor. — Aloe  sp.,  Ceratonia  Siliqua,  L.;  Citrus  Aurantium,  L  , 
C.  medica,  L.,  and  C.  medica,  L  ,  var.  Limonum  ;  Draccena  Draco,  L.;  Ficus 
elastica,Roxh.;  Picrcena  excelsa,  Lindl.;  and  Pilocarpus  pennatifolius,  Lem. 
