210 
I  distinguish  this  solely  by  the  erect  straight  culm  of  the 
one  and  the  decumbent  curved  one  of  the  other,  nor  do  I 
consider  the  culm  base  hidden  in  the  upper  sheath  as  a 
distinctive  character  of  L.  incurvatus,  but  please  measure 
the  anthers  of  your  two  specimens  and  you  will  find  those 
of  L.  filiformis  2-8  mm.  long,  and  those  of  L.  incurvatus 
0- 6  mm.  long,  and  so  they  are  always  whether  you  examine 
British,  French  or  Mediterranean  specimens  of  these  two 
species.  It  is  true,  however,  that  the  Mediterranean 
incurvatus  has  the  sterile  glumes  somewhat  longer  than 
the  fertile  glume,  but  the  difference  is  trifling  and  I  should 
not  try  to  exclude  your  British  specimen  from  L.  incurvatus 
on  that  account ;  perhaps  it  might  be  a  variety  of  it 
which  inclines  somewhat  to  filiformis. — E.  Hackel. 
Woodsia  alpina  Gray  ( hyperborea  Br.).  Ben  Heas- 
garnich,  Mid  Perth,  v.c.  88,  July  1908 _ P.  Ewing. 
Cystopteris  montana  Desv.  Ben  Heasgarnich,  Mid 
Perth,  v.c.  88,  July  1908 _ P.  Ewing. 
Equisetum  arvense  L.,  var.  nemorosum  Braun.  (Ref. 
No.  8236).  Damp,  shady  bank  of  the  Corriemulzie  River, 
Glen  Einig,  near  Oykell  Bridge,  E.  Ross,  v.c.  106,  July  11, 
1908.  Stems  erect,  2  to  3  feet  high.  A  handsome  form. 
This  was  distributed  as  from  E.  Suth.,  v.c.  107,  will 
members  please  correct  label _ E.  S.  Marshall. 
E.  limosum  L.  Palmer’s  Green,  Middlesex,  v.c.  21, 
May  1908 — Coll.  R.  H.  Bunting.  Comm.  W.  R.  Sherrin. 
The  var.  fluviatile  (L.),  I  believe _ E.S.M.  I  think  Mr. 
Marshall  is  right.  Linnaeus  in  the  1st  ed.  of  the  “  Species 
plantarum,”  (1753),  II.,  p.  1062  has, 
“E.  [fluviatile]  caule  striato,  frondibus  subsimplicibus.” 
“E.  [limosum]  caule  subnodo  lsevi.” 
These  names  were  discussed  by  Mr.  H.  C.  Watson  and 
Mr.  E.  Newman  in  the  “Phytologist,”  Vol.  1  (pts.  1  and  2), 
1841-43.— A.B. 
Nitella  opaca  Agardh.  (Ref.  Nos.  2352-3,  2360-2). 
Loch  Deerie  (Loch  an  Dithreibh),  near  Tongue,  W.  Suther¬ 
land,  v.c.  108,  July  4  and  26,  1900.  These  gatherings 
looked  so  unlike,  when  growing,  that  I  believed  more  than 
one  species  to  be  present.  Messrs.  H.  and  J.  Groves  wrote 
as  follows:  “All  N.  opaca.  The  Loch  Deerie  plants  re¬ 
present  a  very  interesting  series  of  forms.” — E.  S.  Marshall. 
