﻿PLANTAIN 
  FAMILY 
  225 
  

  

  3-lobed. 
  Stamens 
  2, 
  inserted 
  in 
  the 
  throat 
  of 
  the 
  corolla. 
  

   Ovary 
  2-celled, 
  4-ovuled 
  ; 
  style 
  simple, 
  acute. 
  Capsule 
  flat- 
  

   tened, 
  narrowed 
  below 
  into 
  a 
  little 
  stalk.* 
  

  

  1. 
  D. 
  americana 
  L. 
  WATER 
  WILLOW. 
  Stem 
  erect, 
  slender, 
  2-3 
  ft. 
  

   high. 
  Leaves 
  lanceolate 
  to 
  linear 
  -lanceolate, 
  taper 
  -pointed 
  at 
  the 
  

   apex, 
  narrowed 
  below 
  to 
  the 
  sessile 
  or 
  short-petioled 
  base. 
  Flowers 
  

   bracted, 
  in 
  short 
  spikes, 
  on 
  peduncles 
  as 
  long 
  as 
  the 
  leaves. 
  Corolla 
  

   pale 
  blue 
  or 
  purple, 
  the 
  tube 
  as 
  long 
  as 
  the 
  lips, 
  lower 
  lip 
  wrinkled. 
  

   Capsule 
  about 
  the 
  length 
  of 
  the 
  calyx. 
  In 
  water, 
  S.* 
  

  

  II. 
  RUELLIA 
  L. 
  

  

  Perennial 
  herbs 
  ; 
  stems 
  swollen 
  at 
  the 
  joints 
  and 
  often 
  

   between 
  them, 
  somewhat 
  4-angled. 
  Leaves 
  sessile 
  or 
  short- 
  

   petioled, 
  mostly 
  entire. 
  Flowers 
  axillary, 
  solitary 
  or 
  clustered, 
  

   showy, 
  white, 
  blue, 
  or 
  purple. 
  Calyx 
  2-bracted, 
  5-parted, 
  the 
  

   divisions 
  linear 
  and 
  awl-shaped. 
  Corolla 
  tube 
  slender, 
  often 
  

   much 
  elongated, 
  the 
  limb 
  spreading, 
  nearly 
  equally 
  5-lobed. 
  

   Stamens 
  4 
  (2 
  long 
  and 
  2 
  short), 
  included 
  or 
  slightly 
  projecting. 
  

   Style 
  slender. 
  Capsule 
  slender, 
  narrowed 
  below, 
  4-12-seeded.* 
  

  

  1. 
  R. 
  ciliosa 
  Pursh. 
  HAIRY 
  RUELLIA. 
  Stem 
  erect, 
  rather 
  stout, 
  

   often 
  few-branched 
  above, 
  covered 
  with 
  white 
  hairs, 
  4-30 
  in. 
  high. 
  

   Leaves 
  oblong 
  to 
  ovate, 
  acute 
  or 
  obtuse 
  at 
  the 
  apex, 
  narrowed 
  and 
  

   mostly 
  sessile 
  at 
  the 
  base, 
  hairy 
  -fringed. 
  Flowers 
  pale 
  blue, 
  solitary 
  

   or 
  2-3 
  together. 
  Calyx 
  lobes 
  bristle-shaped, 
  half 
  the 
  length 
  of 
  the 
  

   corolla 
  tube. 
  Tube 
  of 
  the 
  corolla 
  2 
  in. 
  long. 
  Capsule 
  shorter 
  than 
  

   the 
  calyx, 
  smooth, 
  8-12-seeded. 
  A 
  very 
  variable 
  species, 
  the 
  flowers 
  

   often 
  without 
  a 
  corolla. 
  In 
  dry 
  woods 
  and 
  fields 
  S.* 
  

  

  2. 
  R. 
  strepens 
  L. 
  SMOOTH 
  RUELLIA. 
  Stem 
  erect, 
  slender, 
  usually 
  

   simple, 
  smooth 
  or 
  hairy, 
  1-3 
  ft. 
  high. 
  Leaves 
  ovate 
  to 
  oblong, 
  acute 
  

   at 
  the 
  apex, 
  narrowed 
  below 
  into 
  a 
  short 
  petiole. 
  Flowers 
  solitary 
  or 
  

   in 
  small 
  clusters, 
  sessile 
  or 
  short-pedunclecl. 
  Calyx 
  lobes 
  shorter 
  than 
  

   the 
  tube 
  of 
  the 
  corolla, 
  downy 
  or 
  fringed. 
  Corolla 
  blue, 
  the 
  tube 
  1 
  \-2 
  

   (n. 
  long, 
  the 
  limb 
  1-1| 
  in. 
  wide. 
  Capsule 
  usually 
  longer 
  than 
  the 
  

   calyx, 
  smooth, 
  8-12-seeded. 
  The 
  later 
  flowers 
  often 
  without 
  a 
  corolla. 
  

   On 
  rich, 
  dry 
  soil.* 
  

  

  94. 
  PLANT 
  AGINACEJE. 
  PLANTAIN 
  FAMILY 
  

  

  Annual 
  or 
  perennial 
  scape-bearing 
  herbs. 
  Leaves 
  usually 
  

   all 
  basal, 
  with 
  parallel 
  ribs. 
  Flowers 
  small, 
  green, 
  usually 
  

  

  