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acts  as  a  tendril  by  which  means  the  plant  climbs.  Climbing 
plants  often  become  prostrate  if  they  find  no  external  object  by 
which  teey  can  climb.  Turning  plants  in  most  cases  twine  in 
a  definite  direction.  Ivy  really  acts  as  an  efiicient  protection 
against  the  weather,  adding  both  to  the  dryness  and  w'armth  of 
devouring  insects.  All  carnivorous  plants  grow  in  poor  swampy 
soil  which  is  usually  deficient  in  nitrates,  &c.  By  the  capture 
and  digestion  of  insects  they  obtain  supplies  of  nitrogenous  food, 
and  thus  can  maintain  themselves  in  localities  which  are 
unsmted  for  the  development  of  most  flowering  plants.  All 
Primula  cortusoides  amoena  grandiflora  lilacina. 
(See  page  278.) 
the  house.  Mistletoe  can  be  artificially  propagated  by  slitting 
the  bark  of  a  tree  and  inserting  one  of  iJie  seeds  in  the  aperture, 
binding  it  over  with  something  to  protect  the  seed  from  birds. 
Another  great  and  very  interesting  and  curious  collection  of 
plants  is  the  insectivorous  plants,  drawing  their  name  from  their 
carnivorous  plants  have  great  assimilating  leaves.  The  propa¬ 
gation  of  plants  by^  seed  was  largely  supifiemented  by  methods 
of  propagation  carried  on  by  the  vegetative  system  of  flowering 
plants.  Propagative  leaves  can  both  normally  and  abnormally 
produce  roots  and  bulbs,  and  so  give  rise  te  independent  beings. 
