﻿DOGBANE 
  FAMILY 
  193 
  

  

  anthers 
  somewhat 
  attached 
  to 
  the 
  stigma. 
  Ovary 
  of 
  2 
  carpels, 
  

   free 
  or 
  somewhat 
  united 
  ; 
  style 
  short 
  ; 
  stigma 
  entire 
  or 
  2-cleft. 
  

   Fruit 
  of 
  2 
  many-seeded 
  pods 
  (in 
  the 
  genera 
  here 
  described). 
  

  

  I. 
  AMSONIA 
  Walt. 
  

  

  Perennial 
  herbs. 
  Stems 
  erect, 
  branched. 
  Leaves 
  alternate. 
  

   Flowers 
  in 
  terminal 
  panicles. 
  Calyx 
  small, 
  5-parted. 
  Corolla 
  

   small, 
  pale 
  blue, 
  funnel- 
  or 
  salver-form, 
  downy 
  within. 
  Sta- 
  

   mens 
  inserted 
  above 
  the 
  middle 
  of 
  the 
  tube, 
  included. 
  Ovary 
  

   of 
  2 
  carpels, 
  united 
  at 
  the 
  top 
  by 
  the 
  slender 
  style 
  ; 
  stigma 
  

   globose, 
  surrounded 
  by 
  a 
  cup-shaped 
  appendage. 
  Fruit 
  2 
  slen- 
  

   der, 
  erect, 
  many-seeded 
  follicles 
  ; 
  seeds 
  without 
  tufts 
  of 
  hairs.* 
  

  

  1. 
  A. 
  Tabernaemontana 
  Walt. 
  AMSONIA. 
  Stem 
  smooth 
  and 
  gla- 
  

   brous, 
  branched 
  above, 
  2-3 
  ft. 
  high. 
  Leaves 
  lanceolate, 
  entire, 
  

   acuminate 
  at 
  the 
  apex, 
  acute 
  at 
  the 
  base, 
  smooth 
  above, 
  with 
  a 
  

   bloom 
  or 
  slightly 
  downy 
  beneath, 
  short-petioled. 
  Flowers 
  numer- 
  

   ous, 
  on 
  bracted 
  pedicels. 
  Corolla 
  tube 
  slender, 
  smooth 
  or 
  sometimes 
  

   downy 
  above 
  ; 
  the 
  lobes 
  narrow, 
  as 
  long 
  as 
  the 
  tube. 
  Follicles 
  

   slender, 
  spreading, 
  4-6 
  in. 
  long; 
  seeds 
  downy. 
  Swamps 
  and 
  wet 
  

   ground 
  S.* 
  

  

  H. 
  VINCA 
  L. 
  

  

  Perennial 
  herbs 
  or 
  small, 
  slender 
  shrubs 
  ; 
  juice 
  not 
  per- 
  

   ceptibly 
  milky. 
  Leaves 
  evergreen. 
  Flowers 
  solitary, 
  white, 
  

   blue, 
  or 
  purple. 
  Calyx 
  5-parted 
  ; 
  lobes 
  taper-pointed, 
  glandu- 
  

   lar 
  inside 
  at 
  the 
  base. 
  Corolla 
  salver-shaped, 
  thickened 
  at 
  the 
  

   throat, 
  5-lobed. 
  Stamens 
  5, 
  inserted 
  on 
  the 
  upper 
  or 
  middle 
  

   part 
  of 
  the 
  corolla 
  tube. 
  Ovary 
  of 
  2 
  carpels. 
  Pods 
  2, 
  slender, 
  

   cylindrical, 
  many-seeded. 
  

  

  1. 
  V. 
  minor 
  L. 
  PERIWINKLE. 
  Stem 
  slender, 
  trailing, 
  often 
  rooting 
  

   at 
  the 
  nodes, 
  1-3 
  ft. 
  long. 
  Leaves 
  ovate, 
  acute 
  at 
  the 
  apex, 
  short- 
  

   petioled, 
  bright 
  green. 
  Flowers 
  axillary, 
  solitary, 
  1 
  in. 
  wide. 
  Calyx 
  

   with 
  linear 
  lobes 
  nearly 
  as 
  long 
  as 
  the 
  inflated 
  tube 
  of 
  the 
  blue 
  

   corolla. 
  Matured 
  pods 
  slender, 
  slightly 
  divergent. 
  Introduced 
  from 
  

   Europe 
  and 
  common 
  in 
  gardens.* 
  

  

  HI. 
  APOCYNUM 
  L. 
  

  

  Perennial 
  herbs. 
  Stems 
  with 
  very 
  tough 
  bark, 
  branched 
  

   above. 
  Leaves 
  opposite, 
  entire. 
  Flowers 
  in 
  terminal 
  and 
  

   axillary 
  bracted 
  cymes. 
  Calyx 
  small, 
  5-parted, 
  lobes 
  acute. 
  

  

  