﻿Smith: 
  Studies 
  in 
  the 
  genus 
  Lupinus 
  495 
  

  

  Leaflets 
  

  

  middle. 
  

   Largest 
  leaflets 
  2-4 
  mm. 
  wide. 
  

  

  26, 
  var. 
  insignttus. 
  

  

  2c. 
  var. 
  setosissimus. 
  

  

  Stems 
  stout 
  and 
  fistulose; 
  petals 
  pale 
  lilac 
  or 
  

   purplish. 
  

  

  Stems 
  slender, 
  3-4 
  mm. 
  thick, 
  hardly 
  succulent 
  or 
  

   fistulose; 
  racemes 
  6-15 
  cm. 
  long, 
  petals 
  usually 
  

   bright 
  blue. 
  

   Flowers 
  8-10 
  mm. 
  long. 
  26. 
  var 
  arizonicus. 
  

  

  Flowers 
  11-13 
  mm. 
  long. 
  2a. 
  typical 
  sparsijlorus. 
  

  

  2b. 
  Lupinus 
  sparsiflorus 
  arizonicus 
  (Wats.) 
  comb. 
  nov. 
  [Fig. 
  

   55.] 
  * 
  

  

  P 
  

  

  1873- 
  

  

  Lupimis 
  arizonicus 
  Wats. 
  Ihid. 
  12: 
  250. 
  1876. 
  

  

  Differs 
  from 
  L. 
  sparsifloriis 
  Benth. 
  only 
  in 
  reduced 
  stature 
  and 
  

   in 
  size 
  of 
  flowers, 
  which 
  are 
  from 
  8-10 
  mm. 
  long; 
  pubescence 
  as 
  in 
  

   the 
  typical 
  plant, 
  limited 
  to 
  short 
  subappressed 
  hairs 
  or 
  with 
  few 
  

   to 
  abundant 
  longer 
  spreading 
  hairs. 
  

  

  ( 
  cm 
  

  

  ^IG. 
  55. 
  Lupinus 
  sparsiflorus 
  arizonicus 
  (Wats.) 
  C. 
  P. 
  Smith, 
  i. 
  if. 
  E 
  

   Jones 
  303X 
  (US) 
  ; 
  2. 
  M. 
  Tuck 
  (US 
  34S958) 
  ; 
  3- 
  Rose, 
  Siandley 
  &^ 
  Rmsell 
  13000 
  (US) 
  . 
  

  

  Through 
  intermediates 
  its 
  relationship 
  to 
  both 
  the 
  typical 
  

   form 
  and 
  var. 
  barbaitdus 
  is 
  evident. 
  

  

  Arizona. 
  Cochise 
  County: 
  Camp 
  Lowell 
  mesas, 
  April, 
  

   1881, 
  C. 
  G. 
  Pringle 
  (NY, 
  US); 
  Benson, 
  April, 
  1905, 
  T. 
  E. 
  Wilcox 
  

   (US). 
  Greenlee 
  County: 
  Clifton, 
  April, 
  1879, 
  A. 
  Davidson 
  133 
  

   (G); 
  San 
  Francisco 
  Mountains, 
  near 
  Clifton, 
  April, 
  1881, 
  IL 
  II. 
  

   Riisby 
  (G). 
  Maricopa 
  County: 
  Phoenix, 
  March, 
  1897, 
  R. 
  E. 
  

   Kunze 
  (NY). 
  Mohave 
  County: 
  near 
  Kingman, 
  June, 
  1893, 
  

   N. 
  C. 
  Wilson 
  (UC); 
  mesa 
  near 
  Mellen, 
  Feb., 
  1910, 
  J. 
  Grinnell 
  

   (UC); 
  Mica 
  Spring, 
  March, 
  1894, 
  M. 
  E. 
  Jones 
  4053 
  (RM, 
  US), 
  

   5045 
  g. 
  5051 
  (US); 
  Yucca, 
  May, 
  1884, 
  M. 
  E. 
  Jones 
  388s 
  (NY, 
  

   T, 
  US). 
  Pima 
  County: 
  Loasa 
  to 
  Lavare, 
  via 
  Baboquivari, 
  

  

  