﻿488 
  Smith: 
  Studies 
  ik 
  the 
  genus 
  Lupinus 
  

  

  L. 
  citrinus 
  Kell. 
  Proc. 
  Cal. 
  Acad. 
  Sci. 
  I. 
  2: 
  192. 
  1877. 
  

  

  L. 
  Pondii 
  Greene, 
  Pittonia 
  i: 
  288. 
  1899, 
  

  

  L. 
  defiexus 
  Congdon, 
  Muhlenbergia 
  i: 
  38. 
  1904. 
  

  

  L. 
  Benthami 
  Heller, 
  Ihid. 
  2: 
  61. 
  1905. 
  

  

  L: 
  subhirsutus 
  Davidson, 
  Bull. 
  So. 
  Cal. 
  Acad. 
  Sci. 
  18: 
  80 
  

  

  1919. 
  

  

  Wats 
  

  

  Wats 
  

  

  w 
  

  

  for 
  L. 
  Uptophyllus 
  Benth., 
  since 
  the 
  latter 
  was 
  published 
  jfive 
  

   years 
  later 
  than 
  the 
  Mexican 
  L. 
  lepiophylhis 
  Schl. 
  & 
  Cham. 
  

   Instead 
  of 
  ten, 
  however, 
  I 
  recognize 
  only 
  six 
  species, 
  one 
  of 
  these 
  

   being 
  extremely 
  variable 
  and 
  exhibiting 
  marked 
  variation 
  in 
  

   several 
  directions. 
  

  

  The 
  home 
  of 
  these 
  plants 
  is 
  mainly 
  in 
  southern 
  California, 
  

   from 
  Monterey 
  Bay 
  and 
  El 
  Dorado 
  County 
  to 
  northern 
  Lower 
  

   California; 
  but 
  certain 
  variations 
  of 
  L. 
  sparsiflorus 
  extend 
  south- 
  

   ward 
  to 
  the 
  tip 
  of 
  Lower 
  California, 
  including 
  some 
  of 
  its 
  adjacent 
  

   islands, 
  and 
  others 
  spread 
  eastward 
  over 
  the 
  Mexican 
  Plateau 
  

   region 
  of 
  Arizona, 
  etc. 
  

  

  The 
  principal 
  diagnostic 
  characters 
  of 
  this 
  group 
  are: 
  annuals 
  

   with 
  non-verticillate 
  flowers, 
  racemes 
  2-30 
  cm, 
  long, 
  longer 
  than 
  

   their 
  supporting 
  peduncles; 
  keel 
  petals 
  ciliate 
  below 
  near 
  the 
  claw 
  

   and 
  commonly 
  also 
  ciliate 
  above. 
  

  

  Ke^r 
  to 
  tbe 
  species 
  of 
  the 
  Sparsitlori 
  

  

  Largest 
  leaflets 
  15-20 
  mm. 
  wide; 
  plants 
  conspicuously 
  hispid 
  

  

  with 
  stinging 
  hairs 
  mainly 
  3-5 
  mm. 
  long, 
  i. 
  £,, 
  hirsutissimus, 
  

  

  Largest 
  leaflets 
  2-12 
  mm. 
  wide; 
  plants 
  not 
  obviously 
  hispid, 
  the 
  

  

  the 
  hairs 
  not 
  over 
  2 
  mm. 
  long. 
  

  

  Flowers 
  obviously 
  ascending 
  after 
  anthesis. 
  2. 
  L. 
  spar 
  

  

  Flowers 
  spreading 
  or 
  drooping 
  after 
  anthesis. 
  

  

  Leaflets 
  truncate 
  at 
  apex, 
  entire, 
  notched, 
  or 
  three- 
  

   toothed. 
  

  

  IJlorus 
  

  

  Leaflets 
  cuneate-oblong. 
  petioles 
  terete. 
  2. 
  L, 
  sparsijlorus. 
  

  

  Leaflets 
  linear, 
  petioles 
  usually 
  flattened. 
  ^ 
  3. 
  L. 
  truncalus. 
  

  

  Leaflets 
  angled 
  at 
  apex, 
  mostly 
  acute. 
  

  

  Matured 
  pods 
  ascending; 
  petals 
  blue 
  and 
  purple. 
  4. 
  L. 
  Benthami. 
  

  

  Pods 
  deflexed; 
  petals 
  not 
  blue. 
  

  

  Plants 
  1-2 
  dm. 
  tall; 
  petals 
  orange 
  or 
  golden; 
  pods 
  

  

  two-to 
  four-seeded. 
  ^ 
  j^ 
  ^.^^ 
  .„,,,_ 
  

  

  Plants 
  2-4 
  dm. 
  tall; 
  petals 
  white. 
  or 
  pinkish; 
  pods 
  

  

  five-to 
  eight-seeded. 
  ^^ 
  ^ 
  ^^^^^„,, 
  

  

  