﻿FIGWORT 
  FAMILY 
  219 
  

  

  IV. 
  PENTSTEMON 
  Mitchell 
  

  

  Perennials, 
  the 
  stems 
  branching 
  from 
  the 
  base, 
  unbranched 
  

   above. 
  Leaves 
  opposite. 
  Flowers 
  usually 
  showy, 
  in 
  a 
  ter- 
  

   minal 
  panicle. 
  Calyx 
  of 
  5 
  nearly 
  distinct 
  sepals. 
  Corolla 
  

   tubular, 
  the 
  tube 
  wide 
  above 
  and 
  narrowed 
  below 
  ; 
  2-lipped. 
  

   Stamens 
  4 
  (2 
  long 
  and 
  2 
  short), 
  with 
  a 
  fifth 
  antherless 
  fila- 
  

   ment 
  as 
  long 
  as 
  the 
  others, 
  its 
  upper 
  half 
  bearded. 
  Capsule 
  

   ovoid, 
  acute. 
  

  

  1. 
  P. 
  hirsutus 
  Willd. 
  Stem 
  somewhat 
  sticky 
  -downy, 
  1-2 
  ft. 
  high. 
  

   Leaves 
  varying 
  from 
  oblong 
  to 
  lanceolate, 
  2-4 
  in. 
  long, 
  usually 
  with 
  

   small 
  teeth. 
  Flower 
  cluster 
  narrow. 
  Corolla 
  dingy 
  violet, 
  purplish, 
  

   or 
  whitish 
  ; 
  the 
  tube 
  not 
  much 
  widened 
  above, 
  its 
  throat 
  nearly 
  closed 
  

   by 
  a 
  hairy 
  palate. 
  Sterile 
  filament 
  much 
  bearded. 
  Dry 
  hillsides 
  or 
  

   stony 
  ground. 
  

  

  2. 
  P. 
  gracilis 
  Nutt. 
  SLENDER 
  BKARDTONGUE. 
  Stem 
  6-18 
  in. 
  

   high, 
  smooth 
  below 
  but 
  the 
  flower 
  cluster 
  covered 
  with 
  glandular, 
  

   sticky 
  hairs. 
  Basal 
  leaves 
  spatulate 
  or 
  oblong 
  ; 
  stem 
  leaves 
  most 
  of 
  

   them 
  linear-lanceolate. 
  Corolla 
  purple 
  or 
  whitish, 
  |-1 
  in. 
  long, 
  the 
  

   tube 
  enlarged 
  above 
  and 
  its 
  throat 
  entirely 
  open. 
  Sterile 
  filament 
  

   beardod 
  above 
  along 
  half 
  its 
  length. 
  On 
  moist 
  prairies 
  W. 
  

  

  3. 
  P. 
  laevigatus 
  Ait. 
  Stem 
  usually 
  smooth 
  except 
  the 
  flower 
  cluster, 
  

   2-4 
  ft. 
  high. 
  Leaves 
  shining, 
  those 
  of 
  the 
  stem 
  ovate-lanceolate 
  or 
  

   broadly 
  lanceolate, 
  2-5 
  in. 
  long, 
  with 
  a 
  somewhat 
  heart-shaped, 
  clasp- 
  

   ing 
  base. 
  Flower 
  cluster 
  broader 
  than 
  in 
  No. 
  1. 
  Corolla 
  white 
  or 
  

   oftener 
  purplish, 
  suddenly 
  widened 
  above, 
  the 
  throat 
  not 
  closed. 
  

   Sterile 
  filament 
  slightly 
  bearded 
  toward 
  the 
  top. 
  In 
  rich 
  soil. 
  

  

  4. 
  P. 
  Digitalis 
  Nutt. 
  Much 
  resembling 
  No. 
  3, 
  but 
  taller, 
  sometimes 
  

   5 
  ft. 
  high. 
  Corolla 
  white, 
  the 
  tube 
  abruptly 
  widened. 
  In 
  fields 
  and 
  

   thickets; 
  sometimes 
  cultivated. 
  

  

  5. 
  P. 
  barbatus 
  Roth. 
  Stems 
  slender 
  and 
  rod-like, 
  3-4 
  ft. 
  high. 
  

   Leaves 
  lanceolate, 
  entire. 
  Flower 
  cluster 
  long 
  and 
  loosely 
  flowered. 
  

   Flowers 
  showy, 
  drooping. 
  Corolla 
  tube 
  slender, 
  scarlet, 
  somewhat 
  

   bearded 
  in 
  the 
  throat. 
  Sterile 
  filament 
  beardless. 
  Cultivated 
  from 
  

   Mexico. 
  

  

  V. 
  GRATIOLA 
  L. 
  

  

  Low 
  herbs, 
  growing 
  in 
  wet 
  or 
  damp 
  ground. 
  Leaves 
  oppo- 
  

   site, 
  sessile. 
  Flowers 
  axillary 
  and 
  solitary, 
  peduncled. 
  Calyx 
  

   5-parted, 
  usually 
  with 
  2 
  bractlets 
  at 
  the 
  base. 
  Corolla 
  some- 
  

   what 
  2-lipped. 
  Perfect 
  stamens 
  2. 
  Stigma 
  enlarged 
  or 
  2-lipped. 
  

   Pod 
  4-valved, 
  many-seeded. 
  

  

  