﻿242 
  KEY 
  AND 
  FLORA 
  

  

  Akenes 
  ovoid 
  to 
  spindle-shaped, 
  long-beaked, 
  4-5-ribbed; 
  

  

  pappus 
  white, 
  soft, 
  and 
  abundant. 
  Taraxacum, 
  XVII 
  

   (e) 
  Akenes 
  nearly 
  as 
  in 
  XVII; 
  pappus 
  tawny. 
  

  

  Pyrrhopappus, 
  XXI 
  

   (/) 
  Akenes 
  not 
  flattened, 
  with 
  or 
  without 
  beak, 
  10-ribbed 
  ; 
  pappus 
  

  

  of 
  abundant 
  stiff, 
  hair-like 
  white 
  bristles. 
  Agoseris, 
  XX 
  

   (<?) 
  Akenes 
  flattened, 
  beaked; 
  pappus 
  soft, 
  white, 
  the 
  hairs 
  soon 
  

  

  falling 
  off 
  ; 
  leafy-stemmed 
  herbs. 
  Lactuca, 
  XTX 
  

  

  (h) 
  Akenes 
  flattened, 
  not 
  beaked; 
  pappus 
  abundant, 
  soft, 
  white; 
  

  

  leafy 
  -stemmed, 
  spiny-leaved 
  herbs. 
  Sonchus, 
  XVIII 
  

  

  I. 
  TUBULIFLOR^E 
  

   I. 
  BELLIS 
  L. 
  

  

  Small 
  herbs. 
  Leaves 
  usually 
  all 
  basal, 
  petioled. 
  Heads 
  

   solitary, 
  disk 
  yellow, 
  ray 
  flowers 
  white 
  or 
  pink; 
  involucre 
  

   bell-shaped 
  ; 
  bracts 
  in 
  1 
  or 
  2 
  rows, 
  green 
  ; 
  receptacle 
  conical. 
  

   Ray 
  flowers 
  many, 
  in 
  a 
  single 
  row, 
  pistillate 
  ; 
  disk 
  flowers 
  

   tubular, 
  bisexual, 
  4-5-toothed 
  ; 
  forks 
  of 
  the 
  style 
  short, 
  thick, 
  

   tipped 
  by 
  roughened 
  cones. 
  Fruit 
  flattened, 
  obovate 
  ; 
  pappus 
  

   wanting. 
  

  

  1. 
  B. 
  integrifolia 
  Michx. 
  AMERICAN 
  DAISY. 
  A 
  branching 
  annual 
  

   or 
  biennial 
  herb, 
  4-12 
  in. 
  high. 
  Upper 
  leaves 
  lanceolate 
  or 
  oblong, 
  

   the 
  lower 
  ones 
  obovate-spatulate. 
  Heads 
  borne 
  on 
  slender 
  peduncles; 
  

   rays 
  violet-purple. 
  Prairies, 
  especially 
  S.W. 
  

  

  2. 
  B. 
  perennis 
  L. 
  ENGLISH 
  DAISY, 
  SCOTCH 
  DAISY. 
  An 
  apparently 
  

   stemless 
  perennial. 
  Leaves 
  obovate-spatulate, 
  smooth 
  or 
  hairy. 
  Heads 
  

   |-1 
  in. 
  in 
  diameter, 
  very 
  pretty, 
  the 
  rays 
  delicate. 
  Cultivated 
  from 
  

   Europe. 
  

  

  H. 
  ERIGERON 
  L. 
  

  

  Herbs. 
  Leaves 
  usually 
  sessile. 
  Heads 
  many-flowered, 
  flat 
  

   or 
  nearly 
  hemispherical, 
  the 
  rays 
  numerous, 
  narrow, 
  pistillate. 
  

   Scales 
  of 
  the 
  involucre 
  narrow 
  and 
  overlapping 
  but 
  little. 
  

   Akenes 
  flattish, 
  crowned 
  with 
  a 
  single 
  row 
  of 
  hair-like 
  bristles, 
  

   or 
  sometimes 
  with 
  shorter 
  bristles 
  or 
  scales 
  outside 
  these. 
  

   Disk 
  yellow, 
  rays 
  white, 
  pinkish, 
  or 
  purple. 
  

  

  B. 
  Fl. 
  species 
  5 
  (Leptilon). 
  

  

  