﻿PULSE 
  FAMILY 
  129 
  

  

  (a) 
  Leaflets 
  usually 
  many 
  pairs. 
  Style 
  slender, 
  bearded 
  only 
  

   at 
  the 
  tip 
  or 
  all 
  round 
  the 
  upper 
  portion. 
  Pod 
  2- 
  

   several-seeded. 
  Vicia, 
  XXI 
  

  

  () 
  Leaflets 
  few 
  or 
  several 
  pairs. 
  Style 
  bearded 
  along 
  one 
  

   face 
  only. 
  Pod 
  several-seeded. 
  Lathyrus, 
  XXII 
  

  

  (c) 
  Leaflets 
  1-3 
  pairs. 
  Style 
  enlarged 
  above, 
  grooved 
  on 
  

   the 
  back. 
  Pod 
  several-seeded 
  ; 
  seeds 
  large, 
  globular 
  or 
  

   nearly 
  so. 
  Pisura, 
  XXIII 
  

  

  I. 
  DESMANTHUS 
  Willd. 
  (ACUAN) 
  

  

  Shrubs 
  or 
  perennial 
  herbs. 
  Stems 
  erect 
  or 
  diffuse, 
  smooth. 
  

   Leaves 
  abruptly 
  twice-pinnate 
  ; 
  stipules 
  small. 
  Flowers 
  in 
  

   heads 
  or 
  spikes, 
  on 
  axillary 
  peduncles, 
  the 
  upper 
  bisexual, 
  the 
  

   lower 
  often 
  staminate 
  or 
  neutral. 
  Calyx 
  5-toothed. 
  Corolla 
  of 
  

   5 
  distinct 
  petals 
  or 
  5-oleft. 
  Stamens 
  5-10, 
  distinct. 
  Ovary 
  

   nearly 
  sessile, 
  flat, 
  several-seeded.* 
  

  

  1. 
  D. 
  illinoensis 
  Mac 
  M. 
  DESMANTHUS. 
  Stem 
  erect 
  or 
  ascend- 
  

   ing, 
  smooth, 
  1-4 
  ft. 
  high. 
  Pinnae 
  6-14 
  pairs, 
  each 
  with 
  a 
  minute 
  

   gland 
  at 
  the 
  base 
  ; 
  leaflets 
  20-30 
  pairs, 
  small, 
  linear. 
  Heads 
  globose. 
  

   Stamens 
  5. 
  Pods 
  several, 
  on 
  a 
  peduncle 
  2-3 
  in. 
  long, 
  curved, 
  flat, 
  

   2-valved, 
  3-6-seeded. 
  Open, 
  sandy 
  fields.* 
  

  

  II. 
  SCHRANKIA 
  Willd. 
  (MORONGIA) 
  

  

  Perennial 
  herbs. 
  Stems 
  reclining 
  or 
  prostrate, 
  prickly, 
  2-5 
  

   ft. 
  long. 
  Leaves 
  twice-pinnate 
  ; 
  stipules 
  bristly. 
  Flowers 
  bi- 
  

   sexual 
  or 
  somewhat 
  monoecious, 
  in 
  axillary 
  peduncled 
  heads. 
  

   Calyx 
  minute. 
  Corolla 
  tubular, 
  5-cleft. 
  Stamens 
  8-10, 
  dis- 
  

   tinct. 
  Pod 
  long, 
  prickly, 
  1-celled.* 
  

  

  1. 
  S. 
  uncinata 
  Willd. 
  SENSITIVE 
  BRIER, 
  SENSITIVE 
  ROSE, 
  SHAME 
  

   VINE. 
  Plant 
  covered 
  with 
  hooked 
  prickles. 
  Leaflets 
  elliptical, 
  with 
  

   a 
  conspicuous 
  network 
  of 
  veins 
  beneath 
  ; 
  leaves 
  closing 
  gradually 
  

   after 
  being 
  touched. 
  Flowers 
  rose-colored. 
  Pods 
  nearly 
  cylindrical, 
  

   2 
  in. 
  long. 
  Dry, 
  sandy 
  soil 
  and 
  rolling 
  prairies, 
  especially 
  S. 
  and 
  W. 
  

  

  m. 
  GYMNOCLADUS 
  Lam. 
  

  

  A 
  large, 
  thornless 
  tree, 
  its 
  twigs 
  few 
  and 
  stout. 
  Leaves 
  very 
  

   large, 
  twice 
  pinnately 
  compound, 
  without 
  stipules. 
  Flowers 
  

   actinomorphic, 
  whitish, 
  dioecious 
  or 
  somewhat 
  monoecious, 
  in 
  

  

  