401 
(See  Journ.  Bot.  1912,  p.  883).  Specimens  passed  by  Mr. 
Bucknall — Jas.  W.  White.  These,  too,  are  characteristic 
of  the  hybrid _ C.B. 
S.  peregrinum  Ledeb.  {Fide  C.  Bucknall).  By  cart 
track  between  Manor  Farm  and  King’s  Hedges  Boad, 
Chesterton,  Cambs.,  v.c.  27,  June  7,  1912.— G.  Goode! 
S.  peregrinum  Ledeb.,  when  growing  on  the  banks  of 
streams,  .is  a  tall,  luxuriant  plant,  with  flowers  rose- 
coloured  in  bud,  then  bright  blue,  the  stem  without  wings, 
and  bearing  abundant  fruit.  Wlien  growing  in  dry  localities! 
the  flowers  remain  rose-coloured  or  are  only  partially  blue, 
and  the  entire  plant  is  not  so  well  developed  as  when 
growing  in  moister  situations. 
This  species  forms  a  series  of  hybrids  with  the  white 
and  purple  flowered  varieties  of  S.  officinale ,  which  have 
been  described  by  the  writer  in  the  “Journal  of  Botany  ” 
vol.  L.,  p.  332  (1912).  These  are  distinguished  by  the  more 
or  less  winged  stem,  by  the  colour  of  the  flowers,  which 
are  white,  rose-coloured,  bluish  or  purple,  always  changing 
to  a  cinereous  blue  in  the  dried  plant,  and  by  the  fruit 
being  sparingly  produced. 
Typical  S.  peregrinum ,  as  well  as  some  of  its  hybrids, 
has  often  been  named  S.  patens  Sibth.,  but  the  latter  is 
probably  only  S.  officinale ,  var .purpureum  with  undeveloped 
fruit,  and  the  calyx-lobes,  in  consequence,  spreading  after 
the  flowering,  instead  of  being  connivent  over  the  nutlets  as 
is  the  case  when  they  are  well  developed.  S. peregrinum  has 
also  been  confused  with  S.  asperum  Lepech.  (S.  asperrimum 
Bonn  and  M.B.),  which,  in  Britain,  is  a  much  rarer  plant.  It 
is  distinguished  by  the  small  calyx  with  obtuse  segments,  the 
calyx  in  S.  peregrinum  being  generally  considerably  larger 
with  acute  lanceolate  segments.  With  regard  to  the  clothing 
of  hairs  and  prickles,  and  in  other  characters,  both  species 
are  variable,  and  they  are  often  difficult  to  separate  except 
by  the  above-mentioned  characters  of  the  calyx;  and  when, 
owing  to  conditions  of  climate  or  situation,  the  flowers  are 
imperfectly  developed,  even  these  characters  are  liable  to 
be  deceptive.  It  is  probable  that  intermediates,  and 
possibly  hybrids,  occur,  and  that  they  are  sometimes  the 
cause  of  the  difficulty  in  the  accurate  determination  of 
these  plants. 
