﻿20 
  KEY 
  AND 
  FLORA 
  

  

  CLASS 
  II. 
  ANGIOSPERMS 
  

  

  Plants 
  with 
  a 
  closed 
  ovary, 
  in 
  which 
  the 
  seeds 
  are 
  matured. 
  

   Cotyledons 
  1 
  or 
  2. 
  

  

  SUBCLASS 
  I. 
  MONOCOTYLEDONOUS 
  PLANTS 
  

  

  Stems 
  with 
  the 
  fibrovascular 
  bundles 
  scattered 
  among 
  the 
  

   parenchyma 
  cells 
  ; 
  in 
  perennial 
  plants 
  no 
  annual 
  rings 
  of 
  wood. 
  

   Leaves 
  usually 
  parallel-veined, 
  alternate, 
  nearly 
  always 
  entire. 
  

   Parts 
  of 
  the 
  flower 
  generally 
  in 
  threes 
  (never 
  in 
  fives). 
  Coty- 
  

   ledon 
  1. 
  

  

  2. 
  TYPHACEJE. 
  CAT-TAIL 
  FAMILY 
  

  

  Perennial 
  marsh 
  or 
  aquatic 
  plants. 
  Rootstock 
  stout, 
  creep- 
  

   ing; 
  stem 
  simple, 
  cylindrical, 
  erect. 
  Leaves 
  simple, 
  strap- 
  

   shaped, 
  sheathing 
  at 
  the 
  base, 
  nerved 
  and 
  striate. 
  Flowers 
  

   monoacious, 
  in 
  a 
  single 
  terminal 
  spike, 
  staminate 
  part 
  of 
  the 
  

   spike 
  uppermost, 
  each 
  part 
  subtended 
  by 
  spathe-like 
  deciduous 
  

   bracts. 
  Perianth 
  of 
  fine 
  bristles. 
  Staminate 
  flowers 
  sessile, 
  

   stamens 
  2-7; 
  filaments 
  connate, 
  subtended 
  by 
  minute 
  bracts. 
  

   Pistillate 
  flowers 
  short-pediceled. 
  Ovary 
  1-2-celled 
  ; 
  styles 
  

   1-2. 
  Fruit 
  small, 
  nut-like.* 
  

  

  TYPHA 
  L. 
  

  

  Characters 
  of 
  the 
  family. 
  

  

  1. 
  T. 
  latifolia 
  L. 
  CAT-TAIL. 
  Stem 
  erect, 
  jointed 
  below, 
  5-8 
  ft. 
  

   high. 
  Leaves 
  nearly 
  as 
  long 
  as 
  the 
  stem, 
  about 
  1 
  in. 
  wide, 
  netted 
  

   and 
  with 
  a 
  bloom. 
  Spike 
  cylindrical, 
  dark 
  brown 
  or 
  black 
  ; 
  staminalf 
  

   portion 
  above 
  the 
  pistillate, 
  usually 
  \\itliont 
  any 
  interval 
  between 
  

   them, 
  each 
  4-8 
  in. 
  long 
  and 
  about 
  1 
  in. 
  in 
  diameter. 
  Fruit 
  furrowed. 
  

   Common 
  in 
  marshes 
  and 
  shallow 
  ponds.* 
  

  

  