﻿82 
  KEY 
  AND 
  FLORA 
  

  

  32. 
  NYMPH 
  J 
  ACE 
  JE. 
  WATER 
  LILY 
  FAMILY 
  

  

  Perennial 
  aquatic 
  herbs. 
  Leaves 
  usually 
  floating, 
  often 
  shield- 
  

   shaped. 
  Flowers 
  borne 
  on 
  naked 
  scapes. 
  Floral 
  envelopes 
  and 
  

   stamens 
  all 
  hypogynous 
  or 
  epigynous. 
  Sepals 
  3-6. 
  Petals 
  

   3-5 
  or 
  often 
  very 
  numerous. 
  Stamens 
  many. 
  Carpels 
  3 
  or 
  

   more, 
  free 
  or 
  united. 
  Fruit 
  a 
  berry 
  or 
  a 
  group 
  of 
  separate 
  

   carpels. 
  

  

  I. 
  NYMPHjEA 
  L. 
  

  

  Rootstock 
  horizontal, 
  thick, 
  cylindrical. 
  Leaves 
  heart-shaped, 
  

   floating 
  or 
  erect. 
  Flowers 
  yellow. 
  Sepals 
  4-6, 
  green 
  on 
  the 
  

   outside, 
  obovate, 
  concave. 
  Petals 
  many, 
  hypogynous, 
  the 
  

   inner 
  ones 
  becoming 
  small 
  and 
  stamen-like. 
  Stamens 
  many, 
  

   hypogynous. 
  Ovary 
  cylindrical, 
  many-celled; 
  stigma 
  disk- 
  

   shaped. 
  Fruit 
  ovoid.* 
  

  

  1. 
  N. 
  advena 
  Ait. 
  YELLOW 
  POND 
  LILY, 
  Cow 
  LILY, 
  SPATTER- 
  

   DOCK. 
  Leaves 
  oval 
  or 
  orbicular, 
  rather 
  thick, 
  often 
  downy 
  beneath. 
  

   Flowers 
  bright 
  yellow, 
  '2-3 
  in. 
  in 
  diameter, 
  depressed-globular. 
  

   Sepals 
  6. 
  Petals 
  thick 
  and 
  fleshy, 
  truncate. 
  Stamens 
  in 
  several 
  

   rows 
  ; 
  anthers 
  nearly 
  as 
  long 
  as 
  the 
  filaments. 
  In 
  slow 
  streams 
  and 
  

   still 
  water.* 
  

  

  n. 
  CASTALIA 
  Salisb. 
  

  

  Rootstock 
  horizontal, 
  creeping 
  extensively. 
  Leaves 
  float- 
  

   ing, 
  entire, 
  shield-shaped 
  or 
  heart-shaped. 
  Flowers 
  showy. 
  

   Sepals 
  4, 
  green 
  without, 
  white 
  within. 
  Petals 
  many, 
  white, 
  

   becoming 
  smaller 
  towards 
  the 
  center. 
  Stamens 
  many, 
  the 
  

   outer 
  with 
  broad 
  and 
  the 
  inner 
  with 
  linear 
  filaments. 
  Ovary 
  

   many-celled, 
  stigmas 
  shield-shaped 
  and 
  radiating. 
  Fruit 
  berry- 
  

   like, 
  many-seeded.* 
  

  

  1. 
  C. 
  odorata 
  Woodville 
  and 
  Wood. 
  WHITE 
  WATER 
  LILY. 
  Root- 
  

   stock 
  large, 
  branched 
  but 
  little. 
  Leaves 
  floating, 
  entire, 
  the 
  notch 
  

   narrow 
  and 
  basal 
  lobes 
  acute, 
  green 
  and 
  smooth 
  above, 
  purple 
  and 
  

   downy 
  beneath. 
  Petioles 
  and 
  peduncles 
  slender. 
  Flowers 
  white, 
  very 
  

   fragrant, 
  opening 
  in 
  the 
  morning, 
  3-5 
  in. 
  broad. 
  Fruit 
  globose 
  ; 
  seeds 
  

   inclosed 
  in 
  a 
  membranaceous 
  sac. 
  In 
  ponds 
  and 
  still 
  water.* 
  

  

  2. 
  C. 
  tuberosa 
  Greene. 
  Much 
  like 
  No. 
  1. 
  Rootstock 
  bearing 
  loosely 
  

   attached, 
  often 
  compound 
  tubers. 
  Leaves 
  round-kidney-shaped, 
  sel- 
  

   dom 
  purple 
  beneath. 
  Flowers 
  larger 
  than 
  in 
  No. 
  1, 
  scentless 
  or 
  nearly 
  

   so. 
  Slow 
  streams, 
  especially 
  W. 
  

  

  