﻿COMPOSITE 
  FAMILY 
  

  

  241 
  

  

  Rudbeckia, 
  IV 
  

   Lepachys, 
  V 
  

  

  Rays 
  yellow. 
  

  

  Disk 
  purplish-brown. 
  

   Disk 
  gray. 
  

   Disk 
  yellow. 
  

  

  Involucre 
  of 
  2 
  rows 
  of 
  bracts, 
  the 
  outer 
  rather 
  leaf 
  -like. 
  

  

  Coreopsis, 
  VI 
  

   Involucre 
  of 
  reflexed 
  scales 
  ; 
  pappus 
  of 
  5-8 
  scales. 
  

  

  Helenium, 
  VII 
  

   Involucre 
  of 
  erect 
  scales 
  ; 
  pappus 
  of 
  abundant 
  soft 
  hairs. 
  

  

  Senecio, 
  XI 
  

  

  Rays 
  none, 
  but 
  the 
  marginal 
  flowers 
  sterile 
  and 
  their 
  tubular 
  

   corollas 
  partly 
  flattened 
  like 
  rays. 
  Centaurea, 
  XIII 
  

  

  Rays 
  none, 
  and 
  marginal 
  flowers 
  like 
  the 
  others; 
  scales 
  of 
  the 
  in- 
  

   volucre 
  not 
  prickly. 
  Antennaria, 
  III 
  

   Rays 
  none 
  and 
  marginal 
  flowers 
  like 
  the 
  others 
  ; 
  scales 
  of 
  the 
  in- 
  

   volucre 
  overlapping 
  in 
  many 
  rows, 
  prickly 
  -pointed. 
  

  

  Cirsium, 
  XII 
  

  

  II. 
  LIGULIFLORJE 
  

  

  Corollas 
  all 
  strap-shaped. 
  

  

  Corollas 
  blue 
  (rarely 
  pinkish); 
  

   akenes 
  not 
  beaked. 
  

  

  Cichorium, 
  XIV 
  

   Corollas 
  blue; 
  akenes 
  beaked. 
  

  

  Lactuca, 
  XIX 
  

   Corollas 
  yellow. 
  

  

  (a) 
  Akenes 
  truncate 
  ; 
  pappus 
  double, 
  

   of 
  chaff 
  and 
  bristles. 
  

  

  Krigia, 
  XV 
  

  

  (6) 
  Akenes 
  columnar; 
  pappus 
  of 
  

   tawny, 
  rough 
  bristles 
  ; 
  stem 
  

  

  scape-like. 
  FlG 
  31 
  Types 
  of 
  pappus 
  hairs 
  

  

  Hieracium, 
  XXII 
  

  

  A, 
  smooth 
  hair 
  of 
  dandelion; 
  B, 
  

   (c) 
  Akenes 
  spindle-shaped, 
  not 
  plumose 
  hair 
  of 
  fall 
  dandelion 
  ; 
  

  

  beaked; 
  pappus 
  of 
  plumed 
  fr^/V^ 
  natural 
  

   bristles. 
  Leontodon, 
  XVI 
  s 
  i 
  ze 
  ) 
  

  

  