555 
Leucojum  vernum  L.  (Ref.  No.  4056).  Near  Stog- 
nmber,  S.  Somerset,  v.c.  5,  Mar.  8,  1915. — E.  S.  Marshall. 
Allium,  vineale  L.,  var.  compactum  (Thuill.).  Junction 
of  Norton  and  Wilbury  Roads,  Letchworth,  Herts.,  v.c.  20, 
June  26,  1915. — H.  C.  Littlebury.  Right.— J.W.W. 
Juncus  tenuis  Willd.  Crianlarich,  Pertlish.,  v.c.  88, 
Sept.  13,  1915.  Abundant  in  a  marshy  piece  of  ground 
near  the  roadside. — C.  E.  Salmon. 
Luzula  campestris  DC.,  var.  congesta  Syme.  Hillside, 
Winterhead,  Sidcot,  N.  Somerset,  v.c.  6,  Apr.  13,  1915. — 
Ida  M.  Roper.  These  look  like  starved  plants.  Rouy  gives 
Diard  as  the  authority  for  the  varietal  name. — E.S.M. 
I  should  call  it  a  starved  condition — possibly  due  to 
exposed  position — which,  if.  cultivated,  would  revert  at 
once  to  type. — E.F.L.  This  answers  to  Syme’s  description. 
—  A.B. 
Wolffia  arrhiza  Wimm.  Pond,  E.  of  Burnham,  N. 
Somerset,  v.c.  6,  Sept.  23,  1915.  (See  “  Jl.  Bot.,”  Nov. 
1915).y^-Ida  M.  Roper. 
Damasoniuvi  Alisina  Mill.  Briton’s  Pond,  near 
Guildford,  Surrey,  v.c.  17,  Sept.  1915. — J.  Comber. 
Potamogeton  polygonifolius  Poult.  (Ref.  No.  193). 
Peat  swamp  (at  600  feet  alt.),  Arthog,  Merionethsh.,  v.c. 
48,  June  14,  1915.  Is  this  a  “form”  due  entirely  to 
situation,  and  has  it  been  shown  to  revert  to  type  when 
grown  in  water?  Syme’s  var  y  ericetorum  has  apparently 
been  abandoned.  The  leaves  in  these  plants  vary  from 
lanceolate  to  sub-orbicular. — W.  C.  Barton.  This  is  a 
small  form,  not  exactly  answering  to  any  of  the  28 — 40 
named  varieties  of  it,  which  are  mostly  forms,  induced  by 
local  conditions.  Syme’s  ericetorum  had  been  named  forma 
cordifofia  Cham,  et  Sell  lech  t.  in  1827 !  No  doubt  Mr. 
Barton’s  form  is  due  to  the  situation.  One  extreme  form 
has  leaves  4  inches  long  and  2^  wide! — A.B.  This  is  the 
common  state  of  wet  heaths,  called  var  .ericetorum.  In 
his  “  British  Potamogetons,”  p.  20,  Mr.  Fryer  has  pointed 
out  that  “under  cultivation,  by  gradually  increasing  the 
depth  of  water,  -  var.  ericetorum  ’  speedily  becomes  ‘  var. 
genuinus,'  and  the  same  change  has  been  noticed  in  plants 
growing  naturally.” — E.S.M, 
