﻿146 
  

  

  KEY 
  AND 
  FLORA 
  

  

  or 
  twice 
  as 
  many. 
  Fruit 
  a 
  3-lobed 
  capsule. 
  Seeds 
  containing 
  

   fleshy 
  or 
  oily 
  endosperm. 
  Most 
  of 
  the 
  family 
  are 
  natives 
  of 
  

   hot 
  regions, 
  many 
  of 
  them 
  of 
  peculiar 
  aspect 
  from 
  their 
  adap- 
  

   tation 
  to 
  life 
  in 
  dry 
  climates. 
  [The 
  family 
  is 
  too 
  difficult 
  for 
  

   the 
  beginner 
  in 
  botany 
  to 
  determine 
  many 
  of 
  its 
  genera 
  and 
  

   species 
  with 
  certainty, 
  but 
  a 
  few 
  are 
  described 
  below.] 
  

  

  I. 
  JATROPHA 
  L. 
  

  

  Shrubs 
  or 
  herbs. 
  Leaves 
  alternate. 
  Flowers 
  monoscious, 
  

   staminate 
  and 
  pistillate 
  intermixed 
  in 
  the 
  cymes, 
  apetalous. 
  

   Calyx 
  large, 
  white, 
  5-lobed, 
  corolla-like. 
  Stamens 
  numerous, 
  

   usually 
  monadelphous. 
  Ovary 
  usually 
  3-celled, 
  3-seeded 
  ; 
  styles 
  

   3, 
  united 
  at 
  the 
  base, 
  several-parted.* 
  

  

  1. 
  J. 
  stimulosa 
  Michx. 
  SPURGE 
  NETTLE. 
  Perennial 
  herbs 
  armed 
  

   with 
  stinging 
  hairs; 
  stems 
  erect, 
  branched, 
  bright 
  green 
  with 
  white 
  

   lines, 
  8-15 
  in. 
  high. 
  Leaves 
  long-petioled, 
  deeply 
  palmately 
  3-5- 
  

   lobed, 
  the 
  lobes 
  irregularly 
  cut 
  and 
  toothed, 
  often 
  mottled. 
  Sepals 
  

   white, 
  spreading. 
  Seeds 
  oblong, 
  smooth, 
  mottled. 
  In 
  dry 
  woods 
  S.* 
  

  

  C 
  

  

  FIG. 
  23. 
  Euphorbia 
  corollata 
  

  

  A, 
  flower 
  cluster 
  with 
  involucre, 
  the 
  whole 
  appearing 
  like 
  a 
  single 
  flower. 
  

   B, 
  a 
  single 
  staminate 
  flower: 
  a, 
  anther. 
  C, 
  fertile 
  flower, 
  as 
  seen 
  after 
  

   the 
  removal 
  of 
  the 
  sterile 
  flowers. 
  1), 
  partly 
  matured 
  fruit: 
  i, 
  involucre 
  ; 
  

   s, 
  stigmas 
  ; 
  c, 
  capsule 
  

  

  II. 
  EUPHORBIA 
  L. 
  

  

  Herbs 
  or 
  shrubs, 
  with 
  milky 
  juice, 
  often 
  poisonous. 
  Flowers 
  

   monoecious, 
  inclosed 
  in 
  a 
  4-5-lobed 
  involucre, 
  which 
  is 
  often 
  

   showy 
  and 
  resembles 
  a 
  calyx 
  or 
  corolla, 
  usually 
  bearing 
  large 
  

  

  