﻿FEB. 
  4, 
  1922 
  

  

  PITTIER: 
  DALBERGIAS 
  of 
  MEXICO 
  

  

  55 
  

  

  1. 
  D. 
  cuhilquitzensis 
  . 
  

  

  2. 
  D. 
  tucurensis. 
  

  

  3. 
  D. 
  melanocardium. 
  

  

  KEY 
  TO 
  THE 
  MIDDLE 
  AMERICAN 
  SPECIES 
  OF 
  DALBERGL.\ 
  

  

  Standard 
  blade 
  straight 
  or 
  hardly 
  reflexed; 
  style 
  

  

  short 
  and 
  thick 
  (Sissoa). 
  

  

  Leaflets 
  ovate 
  or 
  oblong-lanceolate, 
  rather 
  

  

  large 
  (3 
  to 
  11 
  cm. 
  long); 
  stamens 
  9. 
  

  

  Flowers 
  about 
  5.5 
  mm. 
  long, 
  the 
  standard 
  

  

  obovate, 
  subauriculate 
  at 
  the 
  base 
  ; 
  leaflets 
  

  

  3 
  to 
  8 
  cm. 
  long, 
  1.5 
  to 
  2.5 
  cm. 
  broad. 
  

  

  Flowers 
  about 
  3.5 
  mm. 
  long, 
  the 
  standard 
  

  

  ovate 
  or 
  oblong, 
  attenuate 
  at 
  the 
  base; 
  

  

  leaflets 
  4 
  to 
  11 
  cm. 
  long, 
  2 
  to 
  5 
  cm. 
  

  

  broad. 
  

  

  Leaflets 
  ovate 
  or 
  ovate-long, 
  rather 
  small 
  

  

  (seldom 
  over 
  4 
  cm. 
  long) 
  ; 
  stamens 
  9 
  or 
  10. 
  

  

  Stamens 
  9. 
  

  

  Inflorescences 
  loose, 
  dichotomous-panicu- 
  

   late; 
  flowers 
  about 
  4 
  mm. 
  long; 
  

   leaflets 
  ovate, 
  obtuse 
  or 
  subacumi- 
  

   nate. 
  Ovary 
  1 
  -ovulate; 
  standard 
  

   suborbiculate. 
  

   Inflorescences 
  congested, 
  cymose-panicu- 
  

   late. 
  

   Flowers 
  3 
  to 
  3.5 
  mm. 
  long; 
  ovary 
  gla- 
  

   brous, 
  2 
  or 
  3-ovulate; 
  leaflets 
  3 
  to 
  

   5 
  cm. 
  long. 
  

   Flowers 
  about 
  5.5 
  mm. 
  long; 
  ovary 
  

   hairy, 
  1 
  or 
  2-ovulate; 
  leaflets 
  0.5 
  to 
  

   3 
  cm. 
  long. 
  

   Stamens 
  10. 
  

   Pistil 
  glabrous. 
  

  

  Ovary 
  4 
  or 
  5-ovulate; 
  wings 
  narrow, 
  

   elongate, 
  the 
  base 
  of 
  the 
  blade 
  

   truncate, 
  2-auriculate 
  ; 
  leaflets 
  ob- 
  

   long 
  or 
  obovate, 
  whitish 
  and 
  rufo- 
  

   reticulate 
  beneath. 
  

   Ovary 
  1 
  or 
  2-ovulate; 
  wings 
  oblique, 
  

   obovate, 
  1-auriculate; 
  leaflets 
  ovate, 
  

   emarginate, 
  ferruginous-pubescent 
  

   beneath. 
  

   Pistil 
  more 
  or 
  less 
  hairy. 
  Ovary 
  2 
  or 
  3- 
  

   ovulate. 
  

   Flowers 
  5 
  mm. 
  long, 
  the 
  pedicels 
  1 
  mm. 
  

   long 
  or 
  less; 
  ovary 
  minutely 
  pubes- 
  

   cent; 
  standard 
  subauriculate. 
  

   Flowers 
  10.5 
  mm. 
  long, 
  the 
  pedicels 
  2.5 
  

   to 
  3.5 
  mm. 
  long; 
  ovary 
  hairy 
  on 
  the 
  

   margins; 
  standard 
  attenuate 
  at 
  the 
  

   base. 
  

   Standard 
  blade 
  reflexed 
  (with 
  one 
  exception, 
  

   D. 
  hrownei, 
  but 
  then 
  leaves 
  1-foliolate) 
  ; 
  

   style 
  slender, 
  often 
  subulate 
  (Amerininon). 
  

  

  4. 
  D. 
  glomerata. 
  

  

  5. 
  D. 
  congestiflora. 
  

  

  6. 
  D. 
  tahascana. 
  

  

  7. 
  D. 
  cibix. 
  

  

  8. 
  D. 
  mexicana. 
  

  

  9. 
  D. 
  campecheana. 
  

  

  