﻿MORNING-GLORY 
  FAMILY 
  197 
  

  

  4. 
  A. 
  syriaca 
  L. 
  COMMON 
  MILKWEED. 
  Stem 
  stout, 
  3-4 
  ft. 
  high, 
  

   finely 
  downy. 
  Leaves 
  48 
  in. 
  long, 
  oblong 
  or 
  nearly 
  so, 
  downy 
  be- 
  

   neath. 
  Umbels 
  terminal 
  or 
  nearly 
  so. 
  Flowers 
  varying 
  from 
  purple 
  

   or 
  greenish-purple 
  to 
  whitish, 
  numerous, 
  with 
  a 
  strong, 
  sweet 
  but 
  

   sickening 
  odor 
  ; 
  hoods 
  with 
  a 
  tooth 
  on 
  each 
  side 
  of 
  the 
  stout 
  horn. 
  

   Common 
  in 
  rich 
  soil. 
  

  

  5. 
  A. 
  phytolaccoides 
  Pursh. 
  POKE-LEAVED 
  MILKWEED. 
  Stem 
  

   rather 
  slender, 
  3-5 
  ft. 
  high. 
  Leaves 
  6-9 
  in. 
  long, 
  ovate 
  or 
  oval- 
  

   lanceolate, 
  taper-pointed, 
  short-petioled. 
  Umbels 
  several, 
  mostly 
  lat- 
  

   eral; 
  pedicels 
  slender 
  and 
  drooping. 
  Lobes 
  of 
  the 
  corolla 
  greenish; 
  

   hoods 
  white, 
  with 
  2 
  teeth; 
  horns 
  with 
  an 
  awl-shaped 
  point 
  extending 
  

   far 
  out 
  of 
  the 
  hoods. 
  Damp 
  thickets 
  N. 
  and 
  E. 
  

  

  6. 
  A. 
  variegata 
  L. 
  WHITE 
  MILKWEED. 
  Stem 
  stout, 
  leafless 
  and 
  

   smooth 
  below, 
  leafy 
  and 
  downy 
  in 
  lines 
  above. 
  Leaves 
  opposite, 
  the 
  

   middle 
  ones 
  sometimes 
  in 
  fours, 
  petioled, 
  ovate 
  to 
  obovate, 
  cuspidate, 
  

   smooth 
  on 
  both 
  sides, 
  pale 
  beneath, 
  edges 
  slightly 
  crenate. 
  Umbels 
  

   1-5, 
  compact, 
  downy, 
  1-2 
  in. 
  long; 
  pedicels 
  erect, 
  as 
  long 
  as 
  the 
  

   peduncles. 
  Corolla 
  white, 
  often 
  purple 
  at 
  the 
  base 
  ; 
  hoods 
  roundish, 
  

   spreading, 
  a 
  little 
  longer 
  than 
  the 
  thick, 
  awl-pointed, 
  incurved 
  horn. 
  

   Dry, 
  open 
  woods 
  E. 
  and 
  S.* 
  

  

  7. 
  A. 
  quadrifolia 
  L. 
  FOUR-LEAVED 
  MILKWEED. 
  Stem 
  slender, 
  

   1 
  \ 
  2 
  ft. 
  or 
  more 
  high, 
  usually 
  leafless 
  below. 
  Leaves 
  in 
  1 
  or 
  2 
  whorls 
  of 
  

   4 
  each, 
  near 
  the 
  middle 
  of 
  the 
  stem, 
  and 
  a 
  pair 
  or 
  two 
  opposite, 
  thin, 
  

   slender-petioled, 
  2-4 
  in. 
  long, 
  ovate-lanceolate, 
  taper-pointed. 
  Umbels 
  

   usually 
  2, 
  sometimes 
  1, 
  with 
  slender 
  pedicels. 
  Corolla 
  lobes 
  very 
  pale 
  

   pink 
  or 
  whitish 
  ; 
  hoods 
  white 
  ; 
  horn 
  short, 
  stout, 
  and 
  bent 
  inward. 
  Dry 
  

   woods 
  and 
  fence 
  rows. 
  

  

  in. 
  HOYA 
  R.Br. 
  

  

  Shrubby, 
  more 
  or 
  less 
  climbing, 
  smooth, 
  tropical 
  plants. 
  

   Leaves 
  fleshy. 
  Calyx 
  5-cleft 
  ; 
  corolla 
  5-lobed, 
  wheel-shaped, 
  

   its 
  divisions 
  thick 
  and 
  with 
  a 
  waxy 
  look 
  ; 
  crown 
  of 
  5 
  spread- 
  

   ing 
  segments 
  ; 
  pollen 
  masses 
  fastened 
  by 
  the 
  bases. 
  

  

  1. 
  H. 
  carnosa 
  R. 
  Br. 
  WAX 
  PLANT. 
  Stems 
  long 
  and 
  slender, 
  root- 
  

   ing 
  and 
  trailing. 
  Leaves 
  oval 
  or 
  nearly 
  so, 
  thick, 
  dark 
  green. 
  

   Flowers 
  in 
  close 
  umbels, 
  pink 
  or 
  whitish, 
  the 
  corolla 
  lobes 
  covered 
  

   on 
  the 
  upper 
  surface 
  with 
  minute 
  projections. 
  Cultivated 
  from 
  

   India 
  as 
  a 
  house 
  plant 
  and 
  in 
  conservatories. 
  

  

  83. 
  CONVOLVULACEJE. 
  MORNING-GLORY 
  FAMILY 
  

  

  Usually 
  twining 
  herbs 
  or 
  shrubs, 
  often 
  with 
  milky 
  juice. 
  

   Leaves 
  alternate 
  (wanting 
  in 
  Cuscuta), 
  without 
  stipules* 
  

  

  