415 
same  thing,  and  not  of  P.  alpina  L.  ;  the  foliage  of  these 
two  Lochnagar  grasses  is  practically  identical.  I  have 
cultivated  specimens  from  Mr.Hanbury’s  garden  at  Clapton, 
grown  on  for  two  years  (1886-8)  ;  they  naturally  increased 
in  size,  but  remained  viviparous,  and  the  difference  from 
P.  alpina  is,  if  anything,  exaggerated.  I  believe  that  Mr. 
Druce’s  ‘  P.  alpina,  var.  acutifolia ,’  which  is  certainly  the 
same  as  our  examples  and  Mr.  Ewing’s,  was  published  on 
account  of  Professor  Hackel’s  decided  opinion  that  this 
form  belonged  to  P.  alpina  ;  but  it  is  quite  easy  to  confuse 
viviparous  specimens  of  such  closely  allied  species. — E.S.M. 
It  is  very  difficult  to  form  a  decided  opinion  from  such 
scanty  material.  The  spikelets  being  viviparous,  we  can 
only  rely  on  the  leaves,  which  are  not  so  different  in  P. 
alpina  and  P.  laxa  as  to  allow  a  safe  judgment.  It  would 
be  easy  to  decide  between  these  two  species  if  a  whole  sod 
were  sent,  or  at  least  some  innovation-shoots  were  present 
on  the  base  of  the  flowering  culm,  For  the  innovation- 
shoots  of  P.  alpina  are  exclusively  intravaginal,  those  of 
P.  laxa  (and  P.  cenisia)  partly  intra-,  partly  extravaginal. 
On  the  whole  my  impression  (but  not  a  fully  based  opinion) 
is  that  the  specimen  belongs  to  P.  alpina  vivipara.  As  to 
Mr.  Fisher’s  remarks  on  the  Lochnagar  plant  cultivated  at 
Clapton,  I  must  state  that  I  am  by  no  means  convinced 
that  in  this  locality  (Lochnagar)  P.  laxa  is  the  only  Poa 
of  that  group  growing  there.  Certainly  P.  laxa  grows  on 
Lochnagar ;  I  have  good  specimens  gathered  by  Mr.  Druce, 
but  I  have  also  seen  P.  alpina  from  the  same  station 
(gathered  by  Mr.  Druce).  I  have  in  my  herbarium  more 
than  100  specimens  of  P.  laxa  from  all  parts  of  its  area, 
but  none  is  viviparous,  nor  does  any  author  mention  a 
viviparous  form  of  that  species,  while  P.  alpina  is  well 
known  to  present  this  state  very  often. — E.  Hackel. 
P.  compressa  L.,  var.  Ill -drained  pasture  near  Rudgwick, 
W.  Sussex,  v.c.  13,  Aug.  1893.— J.  W.  White.  P.  compressa 
L.,  genuina. — E.  Hackel. 
Glyceria - .  (1)  Pond  near  Dalkeith,  Haddingtonsh., 
v.c.  82,  Aug.  10,  1912. — McT.  Cowan,  junr.  Sheaths  plicate; 
glumes  as  a  rule  hardly  different  from  G.  fluitans ,  though 
sometimes  obscurely  3-toothed  ;  no  anthers  are  present. 
From  the  combined  characters  and  the  luxuriant  habit  I 
have  little  hesitation  in  calling  it  G.  fluitans  x  plicata 
