﻿224 
  KEY 
  AND 
  FLORA 
  

  

  thus 
  forming 
  a 
  spike. 
  Calyx 
  irregularly 
  4-5-cleft, 
  split 
  down 
  

   the 
  lower 
  side. 
  Corolla 
  swollen 
  below, 
  decidedly 
  2-lipped, 
  the 
  

   upper 
  lip 
  arched. 
  Stamens 
  projecting. 
  

  

  1. 
  C. 
  americana 
  Wallr. 
  SQUAWROOT, 
  CANCER 
  ROOT. 
  Stems 
  3-6 
  

   in. 
  high, 
  yellowish 
  or 
  yellowish-brown. 
  Flowers 
  numerous, 
  incon- 
  

   spicuous. 
  Corolla 
  dirty 
  white 
  or 
  pale 
  brown. 
  In 
  oak 
  woods 
  ; 
  not 
  very 
  

   common. 
  

  

  II. 
  OROBANCHE 
  L. 
  (THALESIA) 
  

  

  Brownish 
  or 
  whitish 
  plants, 
  with 
  naked 
  scapes 
  borne 
  on 
  

   scaly, 
  mostly 
  underground, 
  stems. 
  Calyx 
  regular, 
  5-cleft. 
  

   Corolla 
  5-lobed, 
  slightly 
  irregular. 
  Stamens 
  not 
  projecting 
  

   from 
  the 
  corolla 
  tube. 
  

  

  1. 
  0. 
  uniflora 
  L. 
  ONE-FLOWERED 
  CANCER 
  ROOT. 
  Slightly 
  cov- 
  

   ered 
  with 
  clammy 
  down. 
  Stems 
  very 
  short-branched, 
  each 
  with 
  1-3 
  

   1-flowered 
  scapes 
  3-5 
  in. 
  high. 
  Calyx 
  lobes 
  lance-awl-shaped, 
  half 
  

   as 
  long 
  as 
  the 
  corolla. 
  Corolla 
  yellowish-white, 
  veiny, 
  purple-tinged; 
  

   palate 
  with 
  2 
  yellow 
  bearded 
  ridges. 
  Damp 
  woods. 
  

  

  2. 
  0. 
  fasciculata 
  Nutt. 
  Stem 
  scaly, 
  upright, 
  3-4 
  in. 
  high 
  above 
  

   ground 
  and 
  generally 
  longer 
  than 
  the 
  numerous 
  1-flowered 
  peduncles. 
  

   Calyx 
  lobes 
  short, 
  triangular. 
  Parasitic 
  on 
  wild 
  species 
  of 
  Artemisia^ 
  

   etc., 
  in 
  sandy 
  and 
  loamy 
  soil 
  N.W. 
  and 
  W. 
  

  

  93. 
  ACANTHACE^. 
  ACANTHUS 
  FAMILY 
  

  

  Herbs 
  or 
  shrubs. 
  Leaves 
  opposite 
  or 
  whorled, 
  without 
  

   stipules. 
  Flowers 
  zygomorphic, 
  usually 
  with 
  large 
  bracts. 
  

   Calyx 
  of 
  4 
  or 
  5 
  unequal 
  segments 
  which 
  considerably 
  over- 
  

   lap 
  each 
  other. 
  Corolla 
  4-5-parted 
  and 
  usually 
  more 
  or 
  less 
  

   2-lipped. 
  Stamens 
  usually 
  2 
  long 
  and 
  2 
  short, 
  sometimes 
  only 
  

   2. 
  Ovary 
  free 
  from 
  the 
  calyx. 
  Fruit 
  usually 
  a 
  capsule. 
  Seeds 
  

   not 
  winged. 
  A 
  large 
  family, 
  mostly 
  tropical, 
  with 
  only 
  a 
  few 
  

   insignificant 
  wild 
  species 
  in 
  the 
  northern 
  United 
  States. 
  

  

  I. 
  DIAWTHERA 
  L. 
  

  

  Perennial 
  herbs 
  ; 
  stem 
  smooth. 
  Leaves 
  opposite, 
  entire 
  or 
  

   toothed. 
  Flowers 
  axillary, 
  solitary 
  or 
  clustered, 
  zygomorphic. 
  

   Calyx 
  5-parted. 
  Corolla 
  2-lipped 
  ; 
  upper 
  lip 
  erect, 
  concave, 
  

   entire 
  or 
  notched 
  ; 
  the 
  lower 
  prominently 
  veined, 
  spreading, 
  

  

  