﻿250 
  KEY 
  AND 
  FLORA 
  

  

  hardened 
  receptacle, 
  firmly 
  covered 
  by 
  the 
  stiff 
  iiivolucre, 
  

   obovoid 
  or 
  top-shaped, 
  not 
  beaked 
  ; 
  pappus 
  1 
  or 
  2 
  rows 
  of 
  

   short 
  scales. 
  

  

  1. 
  C. 
  Intybus 
  L. 
  CHICORY, 
  BLUE 
  DANDELION, 
  BLUE 
  SAILORS. 
  

   Root 
  very 
  long, 
  stout, 
  and 
  fleshy; 
  stem 
  1-3 
  ft. 
  high, 
  angled 
  and 
  

   grooved 
  ; 
  branches 
  straight 
  and 
  stiff. 
  Basal 
  leaves 
  and 
  lower 
  stem 
  

   leaves 
  runcinate 
  ; 
  upper 
  stem 
  leaves 
  oblong 
  or 
  lanceolate, 
  clasping, 
  

   those 
  of 
  the 
  branches 
  reduced 
  to 
  bracts. 
  Flowers 
  very 
  showy, 
  usually 
  

   bright 
  blue, 
  rarely 
  pinkish-white. 
  Introduced 
  from 
  Europe 
  ; 
  a 
  trouble- 
  

   some 
  weed 
  in 
  grass 
  lands 
  and 
  common 
  in 
  waste 
  places, 
  particularly 
  

   in 
  New 
  England. 
  

  

  XV. 
  KRIGIA 
  Schreber. 
  (ADOPOGON) 
  

  

  Small, 
  annual 
  or 
  perennial 
  herbs. 
  Leaves 
  mostly 
  basal, 
  

   toothed 
  or 
  lyrate. 
  Heads 
  several-many-flowered 
  ; 
  scales 
  of 
  

   the 
  involucre 
  about 
  2-rowed, 
  thin. 
  Akenes 
  short, 
  truncate 
  ; 
  

   pappus 
  in 
  2 
  rows, 
  the 
  outer 
  one 
  of 
  thin, 
  blunt, 
  chaffy 
  scales, 
  

   the 
  inner 
  one 
  of 
  slender 
  bristles. 
  Corollas 
  yellow. 
  

  

  1. 
  K. 
  virginica 
  Willd. 
  Annual; 
  scapes 
  usually 
  2-5 
  from 
  one 
  root, 
  

   slender. 
  Leaves 
  mostly 
  lyrate, 
  smooth 
  and 
  with 
  a 
  bloom, 
  the 
  earlier 
  

   ones 
  rounded 
  or 
  spatulate. 
  Scales 
  of 
  the 
  involucre 
  linear-lanceolate, 
  

   nearly 
  equal, 
  spreading. 
  Akenes 
  top-shaped, 
  reddishrbrown, 
  crowned 
  

   with 
  5 
  wedge-obovate 
  scales 
  and 
  5 
  rough 
  white 
  bristles. 
  

  

  2. 
  K. 
  Dandelion 
  Nutt. 
  Perennial, 
  from 
  slender 
  tuber-bearing 
  

   roots; 
  scapes 
  leafless, 
  6-18 
  in. 
  high. 
  Leaves 
  entire 
  or 
  nearly 
  so, 
  

   varying 
  from 
  spatulate-oblong 
  to 
  linear-lanceolate. 
  Akenes 
  more 
  

   slender 
  than 
  in 
  No. 
  1; 
  pappus 
  consisting 
  of 
  10-15 
  small, 
  oblong, 
  

   chaffy 
  scales, 
  and 
  15-20 
  bristles. 
  In 
  moist 
  ground, 
  especially 
  S. 
  

  

  3. 
  K. 
  amplexicaulis 
  Nutt. 
  Stem 
  12-18 
  in. 
  high, 
  often 
  2-3 
  from 
  the 
  

   same 
  root, 
  mostly 
  2-forked 
  or 
  3 
  -forked 
  at 
  the 
  summit. 
  Basal 
  leaves 
  

   3-6 
  in. 
  long, 
  lanceolate, 
  entire, 
  toothed 
  or 
  rarely 
  pinnately 
  cut, 
  clasp- 
  

   ing 
  at 
  the 
  base 
  ; 
  stem 
  leaves 
  1-3. 
  Akenes 
  and 
  pappus 
  about 
  as 
  in 
  

   No. 
  2. 
  Moist 
  banks. 
  

  

  XVI. 
  LEONTODON 
  L. 
  

  

  Perennial, 
  scape-bearing 
  herbs 
  ; 
  juice 
  milky. 
  Leaves 
  all 
  

   basal, 
  toothed 
  or 
  pinnatifid, 
  often 
  runcinate. 
  Heads 
  on 
  simple 
  

   or 
  branched 
  scapes, 
  yellow 
  ; 
  bracts 
  of 
  the 
  involucre 
  many, 
  in 
  

   several 
  rows, 
  the 
  anther 
  smaller 
  ; 
  receptacle 
  flat, 
  naked. 
  Arms 
  

   of 
  the 
  style 
  linear, 
  obtuse, 
  hairy. 
  Akenes 
  cylindrical, 
  grooved, 
  

   transversely 
  wrinkled 
  ; 
  beak 
  short 
  ; 
  pappus 
  hairs 
  stiff, 
  in 
  1 
  

   or 
  2 
  rows. 
  

  

  