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  KEY 
  AND 
  FLORA 
  

  

  71. 
  ONAGRACE-S. 
  EVENING 
  PRIMROSE 
  FAMILY 
  

  

  Herbs, 
  rarely 
  shrubs 
  or 
  trees. 
  Leaves 
  opposite 
  or 
  alternate, 
  

   without 
  stipules. 
  Flowers 
  actinomorphic. 
  Limb 
  of 
  the 
  calyx 
  

   epigynous, 
  2^-lobed. 
  Petals 
  2-4, 
  rarely 
  wanting, 
  quickly 
  fall- 
  

   ing 
  off. 
  Stamens 
  1-8. 
  Ovary 
  usually 
  4-celled; 
  style 
  thread- 
  

   like 
  ; 
  stigma 
  entire 
  or 
  4-lobed 
  ; 
  ovules 
  1 
  or 
  more 
  in 
  the 
  inner 
  

   angle 
  of 
  each 
  cell. 
  Fruit 
  a 
  capsule, 
  berry, 
  or 
  drupe. 
  Seeds 
  

   1 
  or 
  more, 
  smooth 
  or 
  hairy. 
  

  

  I. 
  (ENOTHERA 
  L. 
  

  

  Herbs, 
  rarely 
  shrubby. 
  Leaves 
  alternate. 
  Flowers 
  large, 
  yel- 
  

   low, 
  red, 
  or 
  purple. 
  Calyx 
  tube 
  4-angled. 
  Petals 
  4. 
  Stamens 
  

   8. 
  Capsule 
  usually 
  4-celled, 
  many-seeded. 
  

  

  B. 
  Fl. 
  species 
  1 
  (Onayra); 
  species 
  2, 
  3 
  (Kneiffia) 
  ; 
  species 
  4 
  

   (ffartmannia); 
  species 
  5 
  (J\legapterium). 
  

  

  1. 
  (E. 
  biennis 
  L. 
  COMMON 
  EVENING 
  PRIMROSE. 
  Annual 
  or 
  bien- 
  

   nial. 
  Erect 
  and 
  usually 
  stout, 
  1-5 
  ft. 
  high, 
  stein 
  usually 
  simple, 
  

   more 
  or 
  less 
  downy 
  and 
  hairy. 
  Leaves 
  lanceolate, 
  acute 
  or 
  taper- 
  

   pointed, 
  sessile 
  or 
  the 
  lower 
  ones 
  petiolcd. 
  Flowers 
  bright 
  yellow, 
  

   1-2 
  in. 
  in 
  diameter, 
  opening 
  in 
  the 
  evening. 
  Pod 
  oblong, 
  narro\M'd 
  

   above, 
  erect, 
  nearly 
  cylindrical. 
  In 
  dry 
  soil. 
  

  

  2. 
  (E. 
  pumila 
  L. 
  SMALL 
  SUNDROPS. 
  Perennial. 
  Stem 
  erect, 
  finely 
  

   downy, 
  4-24 
  in. 
  high. 
  Leaves 
  usually 
  smooth, 
  entire, 
  obtuse 
  or 
  nearly 
  

   so, 
  the 
  basal 
  ones 
  spatulate, 
  those 
  of 
  the 
  stem 
  varying 
  from 
  oblanceo- 
  

   late 
  to 
  lanceolate. 
  Spikes 
  loose, 
  nodding 
  when 
  young. 
  Flowers 
  $-1 
  

   in. 
  in 
  diameter. 
  Pods 
  slightly 
  glandular-downy, 
  club-shaped, 
  \-\ 
  in. 
  

   long. 
  In 
  dry 
  soil. 
  

  

  3. 
  (E. 
  fruticosa 
  L. 
  SUNDROPS. 
  Biennial 
  or 
  perennial. 
  Stem 
  erect, 
  

   iil't 
  i'ii 
  rather 
  stout, 
  1-3 
  ft. 
  high, 
  downy 
  or 
  sometimes 
  smooth. 
  Leaves 
  

   lance-oblong, 
  or 
  in 
  one 
  variety 
  linear 
  or 
  nearly 
  so, 
  usually 
  minutely 
  

   toothed. 
  Racemes 
  often 
  corymbed. 
  Flowers 
  open 
  in 
  the 
  daytime, 
  

   showy, 
  yellow, 
  1-2 
  in. 
  in 
  diameter. 
  Pod 
  nearly 
  sessile, 
  ellipsoidal, 
  

   with 
  prominent 
  ribs 
  and 
  strong 
  wings. 
  Dry 
  soil, 
  common. 
  

  

  4. 
  CE. 
  speciosa 
  Nutt. 
  SHOWY 
  PRIMROSE. 
  Perennial. 
  Stem 
  downy, 
  

   erect 
  or 
  somewhat 
  decumbent, 
  6 
  in. 
  -3 
  ft, 
  high. 
  Leaves 
  broadly 
  

   lanceolate 
  to 
  linear, 
  sinuate-denticulate 
  or 
  sinuate-pinnatifid, 
  2-3 
  in. 
  

   long. 
  Flowers 
  opening 
  in 
  the 
  daytime, 
  few, 
  11-3^ 
  in. 
  in 
  diameter, 
  

   white 
  to 
  pale 
  pink. 
  Pod 
  strongly 
  8-ribbed. 
  Prairies 
  S.W. 
  

  

  