﻿Smithsonian 
  Report, 
  1927. 
  — 
  Abbot 
  

  

  Plate 
  10 
  

  

  The 
  Klondyke 
  Cosmos, 
  a 
  Typical 
  "Short-Day" 
  Plant 
  

  

  The 
  specimens 
  on 
  the 
  right, 
  exposed 
  full-length 
  Washington 
  summer 
  days 
  were 
  unable 
  to 
  flower. 
  

   That 
  on 
  the 
  left, 
  exposed 
  only 
  8 
  hours, 
  flowered 
  at 
  8 
  inches 
  high. 
  (Work 
  of 
  Garner) 
  

  

  