﻿A 
  FLORA 
  OF 
  ARKANSAS 
  TERRITORY. 
  1 
  63 
  

  

  partly 
  sempervirent, 
  the 
  under 
  surface 
  conspicuously 
  reticulated; 
  

   peduncles 
  radical, 
  sometimes 
  only 
  1-flowered, 
  but 
  more 
  commonly 
  

   several 
  disposed 
  in 
  a 
  leafy 
  raceme; 
  bracts 
  oval; 
  corolla 
  pubescent, 
  

   retorted, 
  of 
  a 
  dark 
  brown 
  colour 
  ; 
  the 
  border 
  trifid, 
  the 
  segments 
  broad 
  

   and 
  retuse. 
  

  

  As 
  arum 
  Canadense. 
  

  

  COTYLEDONES. 
  

  

  Cotyledons 
  or 
  germinal 
  leaves 
  generally 
  two, 
  dissimilar 
  to 
  the 
  

   perfect 
  foliage 
  ; 
  in 
  Pinus 
  and 
  Abies 
  three 
  to 
  twelve.* 
  

  

  CONIFERAE. 
  

  

  1. 
  Pinus 
  inops. 
  2. 
  P. 
  variabilis. 
  3. 
  P. 
  rigida. 
  

  

  Juniperus 
  Virginiana. 
  

  

  Cupressus 
  disticha, 
  (3 
  imhricaria. 
  — 
  Obs. 
  Floriferous 
  branchlets 
  

   covered 
  with 
  imbricated 
  scales; 
  staminiferous 
  flowers 
  collected 
  into 
  

   turbinated 
  aments; 
  the 
  scales 
  numerous, 
  dilated 
  and 
  adnate 
  at 
  the 
  

   base 
  ; 
  staminiferous 
  column 
  filiform 
  ; 
  anthers 
  ten 
  to 
  fifteen, 
  excentri- 
  

   cally 
  peltate 
  ; 
  fructiferous 
  aments 
  two 
  or 
  three 
  together 
  at 
  the 
  base 
  of 
  

   the 
  branches, 
  roundish, 
  the 
  scales 
  also 
  adnate 
  at 
  the 
  base, 
  with 
  one 
  or 
  

   two 
  germs 
  under 
  each, 
  marked 
  with 
  a 
  concave 
  point. 
  

  

  POLYGONEAE. 
  

  

  1. 
  Polygonum 
  aviculare. 
  2. 
  P. 
  erectum, 
  Lin.; 
  Persoon, 
  vol. 
  1, 
  

   p. 
  439 
  (P. 
  aviculare, 
  (3 
  latifolium, 
  Mich. 
  Flor. 
  Amer. 
  vol. 
  1, 
  p. 
  237 
  ; 
  

   Nuttall's 
  Gen. 
  Am. 
  vol. 
  1, 
  p. 
  254). 
  P. 
  floribus 
  pentandris 
  trigynis 
  

   axillaribus, 
  foliis 
  ovalibus 
  obtusis, 
  caule 
  suberecto 
  herbaceo. 
  — 
  Obs. 
  A 
  

  

  * 
  In 
  Pinus 
  there 
  exist 
  three 
  stages 
  of 
  foliation 
  ; 
  as 
  first, 
  the 
  cotyledons, 
  which 
  are 
  followed 
  

   during 
  the 
  year 
  of 
  germination 
  by 
  single 
  naked 
  leaves, 
  and 
  afterwards 
  by 
  the 
  adult 
  leaves, 
  

   collected 
  from 
  two 
  to 
  five 
  together 
  in 
  common 
  sheaths. 
  The 
  reverse 
  of 
  this 
  takes 
  place 
  in 
  

   most 
  of 
  the 
  Acacias 
  of 
  New 
  Holland, 
  whose 
  adult 
  leaves 
  are 
  simple 
  and 
  imperfect, 
  while 
  the 
  

   incipient 
  foliage, 
  or 
  that 
  which 
  immediately 
  succeeds 
  the 
  cotyledons, 
  is 
  compound, 
  as 
  in 
  

   most 
  other 
  species 
  of 
  the 
  genus. 
  

  

  