﻿WEEDS 
  

  

  341 
  

  

  10. 
  In 
  the 
  following 
  table 
  the 
  names 
  in 
  each 
  line 
  at 
  the 
  left 
  of 
  the 
  

   vertical 
  line 
  are 
  those 
  of 
  cultivated 
  plants 
  ; 
  the 
  names 
  at 
  the 
  right, 
  

   those 
  of 
  wild 
  plants 
  of 
  the 
  same 
  family 
  or 
  even 
  more 
  closely 
  related. 
  

   Explain 
  in 
  each 
  case, 
  as 
  well 
  as 
  you 
  can, 
  why 
  the 
  cultivated 
  plant 
  would 
  

   be 
  unable 
  to 
  maintain 
  itself 
  in 
  competition 
  with 
  its 
  wild 
  relatives 
  if 
  

   they 
  were 
  growing 
  side 
  by 
  side. 
  

  

  grasses 
  occurring 
  as 
  weeds 
  

   pigweeds 
  

  

  wheat, 
  corn 
  

   beets, 
  spinach 
  

  

  peonies 
  

  

  garden 
  strawberries 
  

  

  pansies 
  

  

  scarlet 
  salvia 
  

  

  potato, 
  tomato 
  

  

  lettuce 
  

  

  buttercups 
  

  

  cinquefoils 
  

  

  blue 
  dooryard 
  violets 
  1 
  

  

  catnip 
  

  

  Jimson 
  weed, 
  horse 
  nettle, 
  ground 
  cherry 
  

  

  dandelion 
  

  

  11. 
  How 
  should 
  we 
  treat 
  a 
  lawn 
  infested 
  with 
  dandelions? 
  with 
  chick- 
  

   weed? 
  with 
  undesirable 
  grasses? 
  

  

  1 
  Viola 
  papilionacea, 
  V. 
  sororia. 
  

  

  