1.  S.  ChaTTKB-cyparissus.  Cotton  Lavender. — A  dwarf  densely-
branched  shrub  clothed  with  a  close  hoary  pubescence.  Leaves
alternate,  dense,  linear,  with  4  or  6  rows  of  short  obtuse  teeth
projecting  in  all  directions.  Flower-heads  yellow,  on  peduncles
from  6  to  12  inches  long.  There  are  several  varieties  under
different  names,  as  vncaTia,  squarrbaa^  etc.
5.  alplna  is  a  prostrate  species  with  deeply-cut  leaves  and
erect  flower-stalks.
Laathhiia  glabrata  is  a  showy  hardy  annual  from  California.
Leaves  linear,  opposite.     Flowers  yellow.
27.  CHRYSANTHEMUM  (Pyreihrum).
Annual  or  perennial  herbs,  rarely  frutescent.  Leaves  various.
Involucral  bracts  many,  imbricated,  scarious  on  the  margin.
252  Composites — Chrysanthemum.
Receptacle  naked.  Pappus  none  or  cup-shaped.  The  species  are
natives  of  Europe,  Asia,  and  Nortli  Africa.  The  name  is  from
^ua69,  golden,  and  avdefiov^  flowers,  but  it  is  only  applicable  to
some  species.  Some  of  the  species  are  separated  under  the  name
PyrHhrura,  from  having  a  cup-shaped  membranous  pappus.
The  first  name  is  retained  because  it  is  in  general  use.  The
Ox-eye  Daisy,  C.  Leucdnthemvm^  and  the  Corn  Marigold,
C  aSgetum^  are  two  familiar  native  species.
1.  Ch.  SinSnse,  including  Ch.  /7Mi!ioum.-r-These  two  names
designate  two  tolerably  distinct  races  which  are  now  generally
believed  to  have  sprung  from  one  and  the  same  species.  How-
ever this  may  be,  some  of  the  varieties  in  cultivation  at  the
present  time  cannot  be  referred  to  one  or  the  other  with  cer-
tainty, and^to  these  has  recently  been  added  a  third  group  of
varieties  from  Japan  remarkable  alike  for  their  ragged  gro-
tesque-looking flower-heads  and  the  unusual  tints  of  the  flowers.
