﻿192 
  KEY 
  AND 
  FLORA 
  

  

  4-8-lobed. 
  Stamens 
  4-8, 
  inserted 
  on 
  the 
  corolla 
  tube; 
  fila- 
  

   ments 
  thread-shaped 
  ; 
  anthers 
  facing 
  inwards. 
  Ovary 
  1-2- 
  

   celled 
  ; 
  ovules 
  many, 
  on 
  2 
  opposite 
  placentas. 
  Capsule 
  1-celled 
  

   or 
  partially 
  2-celled, 
  2-valved, 
  many-seeded. 
  [The 
  best 
  known 
  

   genus, 
  Gentiana, 
  consists 
  mainly 
  of 
  autumn-flowering 
  species.] 
  

  

  I. 
  OBOLARIA 
  L. 
  

  

  A 
  low, 
  smooth, 
  purplish-green 
  perennial. 
  Flowers 
  axillary 
  

   and 
  terminal. 
  Calyx 
  of 
  2 
  distinct, 
  spatulate, 
  bract-like 
  sepals. 
  

   Corolla 
  tubular-bell-shaped, 
  4-lobed. 
  Stamens 
  short, 
  inserted 
  

   at 
  the 
  notches 
  of 
  the 
  corolla. 
  Style 
  short; 
  stigma 
  2-lipped. 
  

   Capsule 
  ovoid, 
  more 
  or 
  less 
  2-4-celled; 
  seeds 
  very 
  minute 
  

   and 
  numerous. 
  

  

  1. 
  0. 
  virginica 
  L. 
  PENNYWORT. 
  Stem 
  3-8 
  in. 
  high, 
  often 
  several 
  

   from 
  the 
  same 
  root. 
  Leaves 
  somewhat 
  fleshy, 
  wedge-obovate 
  or 
  

   somewhat 
  diamond-shaped, 
  often 
  truncate, 
  sessile. 
  Flowers 
  opposite 
  

   or 
  terminal 
  in 
  threes, 
  nearly 
  sessile. 
  Corolla 
  pale 
  purple 
  or 
  nearly 
  

   white. 
  Rich 
  woodlands, 
  among 
  dead 
  leaves. 
  

  

  II. 
  MENYANTHES 
  L. 
  

  

  Perennial, 
  scape-bearing 
  marsh 
  herbs. 
  Rootstock 
  creeping. 
  

   Leaves 
  of 
  3 
  leaflets. 
  Flowers 
  racemed. 
  Calyx 
  5-parted. 
  

   Corolla 
  fleshy, 
  funnel-shaped, 
  the 
  limb 
  5-parted. 
  Stamens 
  5, 
  

   inserted 
  on 
  the 
  corolla 
  tube. 
  Disk 
  of 
  5 
  hypogynous 
  glands. 
  

   Ovary 
  1-celled 
  ; 
  style 
  thread-shaped 
  ; 
  stigma 
  2-lobed. 
  Capsule 
  

   globose, 
  many-seeded. 
  

  

  1. 
  M. 
  trifoliata 
  L. 
  BUCK 
  BEAN, 
  MARSH 
  TREFOIL. 
  Rootstocks 
  

   stout 
  and 
  matted. 
  Leaflets 
  obtuse, 
  entire. 
  Flowers 
  f 
  in. 
  in 
  diameter, 
  

   white 
  or 
  pinkish. 
  Bogs, 
  especially 
  N. 
  

  

  81. 
  APOCYNACEJE. 
  DOGBANE 
  FAMILY 
  

  

  Trees, 
  shrubs, 
  or 
  herbs, 
  with 
  milky 
  juice, 
  often 
  climbing. 
  

   Leaves 
  usually 
  opposite, 
  rarely 
  whorled, 
  entire, 
  nearly 
  or 
  

   quite 
  without 
  stipules. 
  Flowers 
  actinomorphic, 
  solitary 
  or 
  in 
  

   cymes. 
  Calyx 
  4 
  5-cleft. 
  Corolla 
  hypogynous, 
  funnel-, 
  salver-, 
  

   or 
  bell-shaped, 
  sometimes 
  with 
  scales 
  in 
  the 
  throat. 
  Stamens 
  

   4-5, 
  borne 
  on 
  the 
  corolla 
  tube 
  or 
  throat 
  ; 
  filaments 
  very 
  short 
  ; 
  

  

  