﻿162 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  Typha 
  angustifolia 
  Z. 
  

  

  Professor 
  Dudley 
  has 
  described 
  a 
  variety 
  of 
  Typha 
  latifolia, 
  

   under 
  the 
  name 
  elongata. 
  In 
  it 
  both 
  the 
  leaves 
  and 
  spikes 
  are 
  

   elongated, 
  the 
  former 
  being 
  "2 
  to 
  3^ 
  meters 
  " 
  long, 
  the 
  latter 
  

   " 
  often 
  30 
  centimeters." 
  

  

  A 
  similar 
  variety 
  of 
  Typha 
  angustifolia 
  is 
  found 
  along 
  the 
  

   shore 
  of 
  Cayuga 
  lake, 
  between 
  the 
  railroad 
  bridge 
  and 
  the 
  outlet. 
  

   In 
  it 
  the 
  fertile 
  part 
  of 
  the 
  spike 
  is 
  eight 
  to 
  ten 
  inches 
  long. 
  It 
  

   may 
  be 
  designated 
  var. 
  longispicala, 
  though 
  I 
  suspect 
  it 
  is 
  

   merely 
  a 
  luxuriant 
  development 
  of 
  the 
  common 
  form. 
  

  

  Pontederia 
  cordata 
  L, 
  

  

  Specimens 
  of 
  this 
  plant 
  were 
  collected 
  in 
  Highland 
  lake 
  in 
  

   which 
  the 
  fibrous 
  roots 
  had 
  a 
  beautiful 
  purple 
  color. 
  Yar. 
  

   angustifolia 
  Torr. 
  occurs 
  here 
  ; 
  also 
  in 
  Stissing 
  pond, 
  Dutchess 
  

   count3 
  r 
  . 
  

  

  Potamogeton 
  Xtfuttallii 
  Ch. 
  & 
  Sch. 
  

  

  A 
  form 
  of 
  this 
  species 
  was 
  collected 
  in 
  the 
  upper 
  waters 
  of 
  the 
  

   Oswegatchie 
  river 
  near 
  Sternbergs, 
  in 
  which 
  the 
  stem 
  branches 
  

   freely, 
  and 
  the 
  leaves 
  are 
  unusually 
  narrow. 
  It 
  is 
  here 
  character- 
  

   ized 
  as 
  var. 
  ramosus. 
  Stem 
  slender, 
  branched 
  ; 
  floating 
  leaves 
  

   with 
  blades 
  1.5 
  to 
  2.5 
  in. 
  long, 
  3 
  to 
  6 
  lines 
  broad; 
  submerged 
  

   leaves 
  1 
  to 
  2 
  lines 
  broad. 
  The 
  name 
  P. 
  Pennsylvanious 
  Cham, 
  

   is 
  applied 
  to 
  this 
  species 
  in 
  the 
  Manual. 
  I 
  have 
  followed 
  Dr. 
  

   Morong 
  in 
  nomenclature. 
  

  

  Potamogeton 
  amplifolius 
  Tuckm. 
  

   This 
  is 
  one 
  of 
  our 
  most 
  common 
  species. 
  It 
  occurs 
  in 
  all 
  parts 
  

   of 
  the 
  State, 
  in 
  still 
  or 
  flowing, 
  shallow 
  or 
  deep, 
  soft 
  or 
  hard, 
  

   warm 
  or 
  cold 
  water. 
  In 
  deep 
  water 
  it 
  is 
  destitute 
  of 
  floating 
  

   leaves. 
  In 
  Thompson's 
  lake 
  it 
  skirts 
  the 
  whole 
  western 
  and 
  a 
  

   part 
  of 
  the 
  eastern 
  shore 
  in 
  water 
  four 
  to 
  six 
  or 
  eight 
  feet 
  deep, 
  

   and 
  is 
  always 
  destitute 
  of 
  floating 
  leaves. 
  The 
  foliage 
  generally 
  

   has 
  a 
  rufous 
  tint. 
  It 
  seems 
  to 
  avoid 
  more 
  shallow 
  water. 
  The 
  

   same 
  form 
  occurs 
  in 
  Warner's 
  lake 
  and 
  behaves 
  the 
  same 
  way. 
  

  

  Potamogeton 
  lonchites 
  Tuckm. 
  

   Specimens 
  were 
  collected 
  in 
  and 
  near 
  the 
  outlet 
  of 
  Seneca 
  lake 
  

   in 
  which, 
  though 
  in 
  flower, 
  the 
  floating 
  leaves 
  were 
  wanting 
  or 
  

  

  