﻿136 
  KEY 
  AND 
  FLORA 
  

  

  palmately 
  compound, 
  with 
  3-5 
  linear 
  to 
  obovate-oblong 
  leaflets, 
  cov- 
  

   ered 
  with 
  glandular 
  dots. 
  Flowers 
  ,!-} 
  in. 
  long, 
  loosely 
  racemed. 
  

   Pod 
  rough 
  with 
  glands. 
  Prairies 
  \V. 
  

  

  3. 
  P. 
  argophylla 
  Pursh. 
  SILVER-LEAVED 
  PSORALEA. 
  Densely 
  

   silvery 
  downy, 
  with 
  white, 
  close-lying 
  hairs. 
  Stem 
  often 
  zigzag, 
  1-3 
  

   ft. 
  high. 
  Leaves 
  palmate 
  ; 
  leaflets 
  3-5, 
  elliptical-lanceolate, 
  oval 
  or 
  

   obovate. 
  Spikes 
  interrupted, 
  the 
  peduncles 
  longer 
  than 
  the 
  leaves. 
  

   Flowers 
  blue 
  or 
  purplish, 
  ^ 
  in. 
  or 
  more 
  long. 
  Pod 
  ovate, 
  beak 
  straight 
  . 
  

   Prairies, 
  especially 
  N.W. 
  

  

  4. 
  P.esculenta 
  I'ursh. 
  POMME 
  BLANCHE, 
  TIPSIN, 
  DAKOTA 
  TYuNip. 
  

   Clothed 
  with 
  roughish 
  hairs. 
  Stem 
  5-15 
  in. 
  high, 
  erect 
  and 
  stout. 
  

   Root 
  turnip-shaped, 
  starchy, 
  eatable. 
  Leaves 
  palmately 
  compound, 
  

   with 
  5 
  lance-oblong 
  leaflets. 
  Flowers 
  I 
  in. 
  long, 
  in 
  a 
  dense 
  ellipsoidal 
  

   spike. 
  Pod 
  hairy, 
  with 
  a 
  pointed 
  tip. 
  High 
  prairies 
  or 
  plains, 
  

   especially 
  N.W. 
  

  

  XVI. 
  AMORPHA 
  L. 
  

  

  Small 
  shrubs, 
  glandular-dotted. 
  Leaves 
  odd-pinnate. 
  Flowers 
  

   purple, 
  blue, 
  or 
  white, 
  in 
  slender 
  spikes 
  or 
  racemes. 
  Calyx 
  

   5-toothed, 
  persistent. 
  Standard 
  obovate, 
  concave 
  ; 
  wings 
  and 
  

   keel 
  none. 
  Stamens 
  monadelphous, 
  projecting 
  much. 
  Ovary 
  

   sessile. 
  Pod 
  curved, 
  glandular-roughened, 
  1-2-seeded, 
  never 
  

   opening.* 
  

  

  1. 
  A. 
  canescens 
  Pursh. 
  LEAD 
  PLANT, 
  SHOE 
  STRINGS. 
  A 
  bushy, 
  

   white, 
  silky-downy 
  shrub, 
  1-3 
  ft. 
  high. 
  Leaflets 
  small 
  and 
  rni\\ded, 
  

   21-49, 
  oval 
  or 
  oblong-elliptical. 
  Spikes 
  mostly 
  clustered 
  at 
  the 
  sum- 
  

   mit, 
  rather 
  showy. 
  Standard 
  bright 
  blue, 
  roundish. 
  Pod 
  1-seeded, 
  

   slightly 
  longer 
  than 
  the 
  calyx. 
  Prairies. 
  Roots 
  very 
  long 
  and 
  tough, 
  

   hence 
  one 
  common 
  name. 
  

  

  2. 
  A. 
  microphylla 
  Pursh. 
  A 
  bushy 
  shrub 
  about 
  1 
  ft. 
  high. 
  Leaves 
  

   many, 
  short-petioled 
  ; 
  leaflets 
  13-1 
  !t, 
  rigid, 
  oval 
  or 
  oblong. 
  Racemes 
  

   mostly 
  solitary. 
  Flowers 
  fragrant; 
  standard 
  purplish. 
  Prairies, 
  

   especially 
  N.W. 
  

  

  3. 
  A. 
  fruticosa 
  L. 
  FALSE 
  INDIGO. 
  A 
  shrub, 
  6-15 
  ft. 
  high, 
  with 
  

   smooth, 
  dark-brown 
  bark. 
  Leaves 
  petioled 
  ; 
  leaflets 
  15-21, 
  short- 
  

   stalked, 
  oblong, 
  obtuse 
  or 
  notched, 
  sparingly 
  punctate 
  with 
  clear 
  dots. 
  

   Slender 
  flowering 
  spikes, 
  panicled 
  or 
  solitary, 
  4-6 
  in. 
  long. 
  Flowers 
  

   blue 
  or 
  purple. 
  Calyx 
  teeth 
  snort, 
  nearly 
  equal, 
  downy. 
  Pod 
  glandu- 
  

   lar. 
  River 
  banks.* 
  

  

  XVII. 
  ROBINIA 
  L. 
  

  

  Trees 
  or 
  shrubs. 
  Leaves 
  odd-pinnate 
  ; 
  stipules 
  often 
  spiny. 
  

   Flowers 
  showy, 
  in 
  axillary 
  racemes. 
  Calyx 
  short, 
  5-toothed, 
  

  

  