﻿308 
  JOURNAL 
  O-P 
  THE 
  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  VOL. 
  12, 
  NO. 
  13 
  

  

  is 
  thought 
  advisable 
  to 
  make 
  known 
  the 
  most 
  salient 
  features 
  in 
  a 
  

   preliminary 
  paper. 
  

  

  Ten 
  species 
  of 
  plants 
  collected 
  by 
  the 
  writer 
  had 
  not 
  previously 
  been 
  

   reported 
  in 
  the 
  State. 
  These 
  are 
  as 
  follows: 
  Alisma 
  brevipes 
  Greene; 
  

   Hemicarpha 
  aristulata 
  (Coville) 
  Smyth; 
  Naias 
  guadalupensis 
  (Spreng.) 
  

   Morong; 
  Nymphoides 
  peltatum 
  (S. 
  P. 
  Gmel.) 
  Britten 
  & 
  Rendle; 
  Paspa- 
  

   lum 
  plenipilum 
  Nash 
  ; 
  Potamogeton 
  crispus 
  L. 
  ; 
  P. 
  Jriesii 
  Rupr. 
  ; 
  P. 
  

   heterophyllus 
  Schreb.; 
  Ruppia 
  maritima 
  I,.; 
  Rynchospora 
  corniculata 
  

   (Lam.) 
  A. 
  Gray. 
  

  

  The 
  majority 
  of 
  these 
  plants 
  are 
  from 
  stations 
  that 
  fall 
  well 
  within 
  

   the 
  range 
  of 
  manuals 
  covering 
  the 
  region, 
  from 
  which 
  they 
  have 
  been 
  

   omitted, 
  in 
  most 
  cases, 
  from 
  lack 
  of 
  intensive 
  work 
  on 
  the 
  marsh 
  and 
  

   aquatic 
  flora 
  of 
  the 
  state. 
  Naias 
  guadalupensis 
  and 
  Potamogeton 
  

   heterophyllus 
  are 
  good 
  examples 
  of 
  this, 
  as 
  they 
  were 
  found 
  in 
  a 
  number 
  

   of 
  lakes. 
  Most 
  interesting 
  of 
  all, 
  however, 
  were 
  the 
  plants 
  whose 
  

   known 
  range 
  did 
  not 
  previously 
  extend 
  into 
  Missouri. 
  Of 
  these 
  there 
  

   may 
  be 
  mentioned 
  first 
  Nymphoides 
  peltatum, 
  formerly 
  known 
  to 
  be 
  

   naturalized 
  only 
  in 
  the 
  vicinity 
  of 
  Washington, 
  D. 
  C. 
  ; 
  an 
  unpublished 
  

   report 
  for 
  this 
  plant 
  from 
  Louisiana,- 
  as 
  well 
  as 
  that 
  of 
  the 
  writer 
  from 
  

   Missouri, 
  extend 
  its 
  range 
  to 
  the 
  southwest 
  for 
  a 
  considerable 
  distance. 
  

   Another 
  species, 
  Potamogeton 
  Jriesii, 
  was 
  previously 
  unknown 
  south 
  

   of 
  Minnesota, 
  Wisconsin 
  and 
  Michigan. 
  The 
  known 
  range 
  of 
  Alisma 
  

   brevipes 
  is 
  extended 
  southeastward, 
  as 
  formerly 
  it 
  was 
  not 
  recorded 
  

   east 
  of 
  North 
  Dakota, 
  Nebraska 
  and 
  New 
  Mexico, 
  while 
  Hemicarpha 
  

   aristulata 
  was 
  found 
  at 
  the 
  extreme 
  eastern 
  border 
  of 
  its 
  range. 
  

  

  Besides 
  those 
  that 
  have 
  been 
  mentioned, 
  new 
  locality 
  records 
  

   are 
  given 
  for 
  a 
  few 
  other 
  plants 
  that 
  for 
  the 
  most 
  part 
  are 
  decidedly 
  

   rare 
  throughout 
  Missouri, 
  where 
  their 
  distribution 
  is 
  inadequately 
  

   known. 
  In 
  these 
  two 
  categories 
  are 
  : 
  Eleocharis 
  qitadrangulata 
  (Michx.) 
  

   Roem. 
  & 
  Schult. 
  ; 
  Panicum 
  bicknellii 
  Nash. 
  ; 
  Potamogeton 
  ampli- 
  

   f 
  alius 
  Tuckerm. 
  ; 
  P.foliosus 
  Raf. 
  ; 
  P. 
  pectinatus 
  L. 
  ; 
  Sagittaria 
  brevirostra 
  

   Mackenzie 
  & 
  Bush; 
  Utricularia 
  minor 
  L. 
  

  

  Complete 
  data 
  for 
  all 
  plants 
  mentioned, 
  with 
  actual 
  citations 
  of 
  

   specimens 
  collected, 
  will 
  be 
  found 
  in 
  the 
  subjoined 
  list. 
  It 
  may 
  be 
  

   well 
  to 
  add 
  that 
  in 
  all 
  cases 
  where 
  the 
  collector 
  is 
  not 
  cited, 
  the 
  plant 
  

   was 
  collected 
  by 
  the 
  writer. 
  All 
  specimens 
  have 
  been 
  placed 
  in 
  the 
  

   U. 
  S. 
  National 
  Herbarium 
  at 
  Washington. 
  

  

  A 
  list 
  of 
  the 
  more 
  important 
  local 
  and 
  state 
  floras 
  for 
  Missouri 
  has 
  

  

  ^ 
  See 
  annotated 
  list 
  below. 
  

  

  