﻿A 
  FLORA 
  OF 
  ARKANSAS 
  TERRITORY. 
  143 
  

  

  Allied 
  to 
  Oryzopsis. 
  — 
  Hab. 
  On 
  the 
  calcareous 
  hills 
  in 
  the 
  grassy 
  

   plains 
  of 
  Red 
  river. 
  Flowering 
  in 
  May. 
  

  

  1. 
  Muhlenbergia 
  diffusa.— 
  Called 
  nimble-will, 
  and 
  considered 
  as 
  

   an 
  important 
  pasture-grass 
  in 
  Kentucky 
  and 
  Tennessee. 
  2. 
  M. 
  erecta. 
  

  

  1. 
  Agrostis 
  tenuijlora. 
  2. 
  A. 
  strieta. 
  

  

  3. 
  A. 
  arachnoides, 
  Elliott. 
  Panicula 
  patente, 
  capillari; 
  floribus 
  

   binatis, 
  glabris; 
  corolla, 
  arista 
  dorsali 
  tenuissime 
  capillacea 
  longissima; 
  

   foliis 
  brevibus 
  planis. 
  — 
  Hab. 
  In 
  the 
  open 
  and 
  elevated 
  prairies 
  of 
  the 
  

   Arkansas. 
  Flowering 
  in 
  April 
  and 
  May. 
  — 
  Obs. 
  Culm 
  about 
  a 
  span 
  

   in 
  height 
  ; 
  branchlets 
  of 
  the 
  panicle 
  few-flowered, 
  capillary 
  and 
  flex- 
  

   uous 
  ; 
  flowers 
  aggregated 
  towards 
  the 
  summits 
  of 
  the 
  branchlets, 
  com- 
  

   monly 
  purple 
  and 
  somewhat 
  shining; 
  calix 
  lanceolate, 
  the 
  carina 
  

   scabrous 
  ; 
  corolla 
  2-valved, 
  a 
  little 
  shorter 
  than 
  the 
  calix 
  ; 
  awn 
  of 
  the 
  

   dorsal 
  valve 
  about 
  four 
  times 
  its 
  length, 
  appearing 
  like 
  a 
  flaccid 
  silken 
  

   hair; 
  anthers 
  three. 
  This 
  very 
  curious 
  grass, 
  which 
  occurs 
  sometimes 
  

   according 
  to 
  Mr 
  Elliott 
  with 
  a 
  single 
  stamen, 
  appears 
  to 
  be 
  somewhat 
  

   allied 
  to 
  the 
  genus 
  Jarava. 
  

  

  4. 
  A. 
  decumbens. 
  5. 
  A. 
  vulgaris. 
  6. 
  A. 
  clandestina. 
  — 
  Obs. 
  This 
  

   appears 
  to 
  be 
  the 
  Panicum 
  clandestinum 
  of 
  Persoon. 
  7. 
  A. 
  Indica. 
  

   — 
  Hab. 
  Banks 
  of 
  the 
  Mississippi, 
  as 
  far 
  as 
  New 
  Orleans. 
  

  

  1. 
  Trichodium 
  laxiflorum. 
  2. 
  T. 
  decumbens. 
  

   Cinna 
  arundinacea. 
  

  

  1. 
  Cae 
  am 
  agrostis 
  Canadensis. 
  

  

  2. 
  C. 
  *gigantea. 
  Panicula 
  pyramidata, 
  ramis 
  multifloris 
  ; 
  calicibus 
  

   lanceolatis 
  membranaceis 
  corolla 
  mutica 
  breviori, 
  valvulis 
  inaequalibus. 
  

   — 
  Hab. 
  On 
  the 
  sandy 
  banks 
  of 
  Great 
  Salt 
  river 
  of 
  the 
  Arkansas. 
  — 
  

   Obs. 
  The 
  great 
  magnitude 
  and 
  general 
  aspect 
  of 
  this 
  species 
  might 
  

   justly 
  entitle 
  it 
  to 
  the 
  common 
  appellation 
  of 
  a 
  reed, 
  notwithstanding 
  

   the 
  calix 
  containing 
  only 
  a 
  single 
  flower. 
  They 
  grow 
  also 
  in 
  consi- 
  

   derable 
  quantities 
  together. 
  The 
  culm, 
  of 
  a 
  proportionate 
  thickness, 
  

   often 
  attains 
  the 
  height 
  of 
  six 
  feet. 
  The 
  leaves, 
  which 
  are 
  smooth, 
  

   are 
  considerably 
  attenuated 
  towards 
  the 
  point; 
  the 
  stipules 
  are 
  a 
  mere 
  

   margin 
  of 
  dense 
  hairs. 
  The 
  panicle 
  is 
  sometimes 
  nearly 
  as 
  much 
  as 
  

   a 
  man 
  can 
  fathom, 
  consisting 
  of 
  many 
  effuse 
  branches, 
  forming 
  a 
  py- 
  

   ramidal 
  panicle. 
  The 
  flowers 
  are 
  somewhat 
  racemosely 
  aggregated 
  by 
  

   pairs 
  ; 
  the 
  valves 
  of 
  the 
  membranaceous 
  calix 
  are 
  lanceolate, 
  unequal 
  

  

  