﻿204 
  KEY 
  AND 
  FLORA 
  

  

  1. 
  H. 
  peruvianum 
  L. 
  COMMON 
  HELIOTROPE. 
  Somewhat 
  shrubby, 
  

   much 
  branched. 
  Leaves 
  lance-ovate 
  or 
  somewhat 
  oblong, 
  veined 
  

   and 
  much 
  wrinkled, 
  short-petioled. 
  Flowers 
  numerous, 
  in 
  a 
  cluster 
  

   of 
  terminal 
  spikes, 
  bluish-purple 
  or 
  lavender, 
  very 
  sweet-scented, 
  the 
  

   odor 
  not 
  unlike 
  that 
  of 
  vanilla. 
  Cultivated 
  from 
  Peru. 
  

  

  II. 
  CYNOGLOSSUM 
  L. 
  

  

  Coarse, 
  rough-hairy 
  or 
  silky 
  biennials. 
  Flowers 
  small, 
  

   bluish-purple 
  or 
  white, 
  in 
  forked 
  and 
  usually 
  bractless 
  cymes. 
  

   Calyx 
  5-parted. 
  Corolla 
  funnel-shaped, 
  the 
  mouth 
  closed 
  by 
  

   prominent 
  scales, 
  its 
  lobes 
  obtuse. 
  Stamens 
  not 
  projecting. 
  

   Styles 
  stiff, 
  persistent. 
  Nutlets 
  4, 
  covered 
  with 
  hooked 
  or 
  

   barbed 
  bristles, 
  attached 
  to 
  a 
  thickened, 
  conical 
  receptacle. 
  

  

  1. 
  C. 
  officinale 
  L. 
  HOUND'S-TONGUE, 
  SHEEP 
  LICE, 
  DOG 
  BUR, 
  STICK- 
  

   TIGHTS. 
  Stem 
  1-2 
  ft. 
  high, 
  soft-downy, 
  panicled 
  above. 
  Basal 
  

   leaves 
  8-10 
  in. 
  long, 
  long-petioled, 
  oblong 
  or 
  oblong-lanceolate 
  ; 
  

   stem 
  leaves 
  sessile, 
  linear-oblong 
  or 
  lanceolate, 
  rounded 
  or 
  heart- 
  

   shaped 
  at 
  the 
  base. 
  Corolla 
  i 
  in. 
  in 
  diameter, 
  reddish-purple. 
  Nut- 
  

   lets 
  I- 
  in. 
  long, 
  with 
  a 
  thickened 
  border. 
  Whole 
  plant 
  with 
  a 
  strong 
  

   smell 
  like 
  that 
  of 
  mice. 
  A 
  troublesome 
  weed 
  ; 
  along 
  roadsides 
  and 
  

   in 
  pastures; 
  naturalized 
  from 
  Europe. 
  

  

  2. 
  C. 
  virginianum 
  L. 
  WILD 
  COMKUKY. 
  Perennial. 
  Stem 
  stout, 
  

   simple, 
  erect, 
  leafless 
  above, 
  2-3 
  ft. 
  high. 
  Leaves 
  oval 
  or 
  oblong, 
  the 
  

   upper 
  clasping 
  by 
  a 
  heart-shaped 
  base. 
  Racemes 
  bractless; 
  flowers 
  

   pale 
  blue, 
  on 
  short 
  pedicels, 
  which 
  are 
  recurved 
  in 
  fruit. 
  Nutlets 
  not 
  

   margined, 
  separating 
  and 
  falling 
  away 
  at 
  maturity. 
  On 
  dry 
  soil. 
  

  

  m. 
  LAPPULA 
  Moench. 
  

  

  Annual 
  or 
  biennial 
  herbs, 
  grayish, 
  with 
  rough 
  hairs. 
  Flowers 
  

   small, 
  blue 
  or 
  whitish, 
  racemed 
  or 
  spiked. 
  Corolla 
  salver- 
  

   shaped, 
  its 
  throat 
  closed 
  with 
  5 
  concave 
  scales. 
  Nutlets 
  more 
  

   or 
  less 
  covered 
  with 
  prickles, 
  which 
  are 
  barbed 
  at 
  the 
  tip, 
  

   attached 
  by 
  their 
  sides 
  to 
  the 
  base 
  of 
  the 
  style. 
  

  

  1. 
  L. 
  virginiana 
  Greene. 
  BEGGAR'S 
  LICE. 
  A 
  coarse 
  biennial, 
  2-4 
  

   ft. 
  high, 
  the 
  stem 
  much 
  branched 
  above. 
  Basal 
  leaves 
  roundish- 
  

   ovate 
  or 
  heart-shaped, 
  on 
  slender 
  petioles; 
  stem 
  leaves 
  3-4 
  in. 
  long, 
  

   pointed 
  at 
  both 
  ends. 
  Racemes 
  1-3 
  in. 
  long, 
  terminating 
  the 
  slender, 
  

   spreading 
  branches; 
  flowers 
  small, 
  bluish-white. 
  Fruit 
  forming 
  a 
  

   troublesome 
  bur. 
  Fence 
  rows 
  and 
  thickets. 
  

  

  