﻿CACTUS 
  FAMILY 
  167 
  

  

  with 
  about 
  8 
  petals. 
  Fruit 
  about 
  1 
  in. 
  long, 
  crimson 
  when 
  ripe, 
  eat- 
  

   able. 
  Dry 
  rocks 
  and 
  sandy 
  ground, 
  from 
  Massachusetts 
  south 
  along 
  

   the 
  coast. 
  

  

  2. 
  0. 
  Rafinesquii 
  Engelm. 
  Prostrate, 
  green. 
  Leaves 
  \-\ 
  in. 
  long, 
  

   awl-shaped, 
  spreading; 
  bristles 
  often 
  intermixed 
  with 
  a 
  few 
  small 
  

   spines 
  and 
  a 
  larger 
  one 
  f-1 
  in. 
  long. 
  Flowers 
  larger 
  than 
  in 
  No. 
  1 
  

   and 
  with 
  10-12 
  petals. 
  Fruit 
  about 
  1 
  in. 
  long, 
  much 
  tapered 
  at 
  the 
  

   base. 
  In 
  poor 
  soil. 
  

  

  3. 
  0. 
  polyacantha 
  Haw. 
  Prostrate, 
  light 
  green. 
  Leaves 
  very 
  small, 
  

   with 
  bristles 
  and 
  5-10 
  spines 
  in 
  their 
  axils. 
  Flowers 
  2-3 
  in. 
  in 
  diam- 
  

   eter. 
  Fruit 
  dry 
  and 
  spiny. 
  Wisconsin, 
  S. 
  and 
  W. 
  

  

  H. 
  PHYLLOCACTUS 
  Link. 
  

  

  Stems 
  cylindrical 
  when 
  old, 
  with 
  long, 
  flattened, 
  fleshy 
  but 
  

   leaf-like, 
  sinuate 
  or 
  serrate 
  branches. 
  Flowers 
  nearly 
  or 
  quite 
  

   regular, 
  from 
  the 
  notches 
  in 
  the 
  margins 
  of 
  the 
  joints. 
  

  

  1. 
  P. 
  Ackermanni 
  Solm. 
  D. 
  Flowers 
  very 
  showy, 
  bright 
  red. 
  

   Perianth 
  tube 
  shorter 
  than 
  the 
  petals. 
  Sepals 
  scattered, 
  small 
  and 
  

   bract-like. 
  Petals 
  many, 
  2-3 
  in. 
  long, 
  widely 
  spreading, 
  somewhat 
  

   channeled, 
  sharp-pointed. 
  Cultivated 
  from 
  Mexico. 
  

  

  ID. 
  CEREUS 
  L. 
  

  

  Stem 
  more 
  or 
  less 
  prismatic 
  but 
  strongly 
  ridged, 
  with 
  bun- 
  

   dles 
  of 
  spines 
  borne 
  on 
  the 
  ridges 
  ; 
  sometimes 
  prostrate 
  or 
  trail- 
  

   ing, 
  sometimes 
  erect, 
  columnar, 
  and 
  50 
  or 
  60 
  ft. 
  high. 
  Flowers 
  

   usually 
  showy, 
  borne 
  on 
  the 
  sides 
  of 
  the 
  stem, 
  generally 
  with 
  

   a 
  rather 
  long 
  perianth 
  tube, 
  which 
  is 
  covered 
  outside 
  with 
  scale- 
  

   like 
  sepals, 
  usually 
  with 
  tufts 
  of 
  wool 
  in 
  their 
  axils. 
  Petals 
  

   many, 
  mostly 
  long 
  and 
  spreading. 
  

  

  1. 
  C. 
  speciosus 
  K. 
  Sch. 
  Stems 
  2-3 
  ft. 
  high, 
  with 
  3-4 
  broad-winged 
  

   and 
  sinuate 
  ridges. 
  Flowers 
  open 
  in 
  the 
  daytime 
  and 
  lasting 
  several 
  

   days, 
  red 
  or 
  crimson, 
  very 
  showy. 
  Petals 
  longer 
  than 
  the 
  tube, 
  stamens 
  

   white, 
  drooping, 
  very 
  numerous. 
  Commonly 
  cultivated 
  from 
  Mexico. 
  

  

  2. 
  C. 
  grandiflorus 
  Mill. 
  NIGHT-BLOOMING 
  CEREUS. 
  Stems 
  long, 
  

   climbing 
  by 
  aerial 
  roots, 
  nearly 
  cylindrical, 
  but 
  with 
  5 
  or 
  more 
  blunt 
  

   angles. 
  Flowers 
  very 
  showy, 
  opening 
  only 
  for 
  one 
  night, 
  wilting 
  early 
  

   in 
  the 
  morning, 
  extremely 
  fragrant. 
  Sepals 
  dull 
  yellow. 
  Petals 
  pearly 
  

   white, 
  spreading, 
  6-8 
  in. 
  long. 
  Cultivated 
  from 
  Mexico. 
  

  

  