THE  VEGETABLE  KINGDOM 1

THALLOGENS 5

ACROGENS ....  51

RHIZOGENS 83

ENDOGENS 95

DICTYOGENS 211

GYMNOGENS 221

EXOGENS 235

GENERA  INSUFFICIENTLY  KNOWN 795

ERRATA  AND  ADDITIONAL  GENERA  .         .                          ...  796

ESTIMATED  NUMBER  OF  GENERA  AND  SPECIES     .        .        .        .797

ARTIFICIAL  ANALYSIS  OF  THE  ORDERS          .        .        .        .        .    .  801

INDEX  OF  THE  SCIENTIFIC  AND  VERNACULAR  NAMES  OF  SPE-
CIES, AND  OF  VEGETABLE  PRODUCTS 811

INDEX  OF  GENERA,  ORDERS,  CLASSES,  &c 833

ABBREVIATIONS 905


INTRODUCTION.
That  part  of  the  material  world  which  bears  the  name  of  the  Vegetable
Kingdom,  consists,  like  the  Animal,  of  a  vast  multitude  of  species,  whose
outer  and  inner  forms  alike  oflfer  a  prodigious  diversity  of  modifications  of
one  common  simple  plan  of  structure.  Organic  vesicles,  usually  extending
into  tubes  of  various  kinds,  exclusively  constitute  what  we  call  Vegetation  ;
but  this  simplicity  of  nature  is  attended  by  very  complex  details  of
arrangement,  as  is  shown  in  trees,  whose  framework  is  knit  together  by
countless  myriads  of  such  vesicles  and  tubes,  entangled  with  an  astonishing
intricacy  of  simple  arrangement.
Any  living  combination  whatsoever  of  such  vesicles  constitutes  a  plant ;
but  as  the  combinations  themselves  are  countless,  so  are  the  resulting
external  forms  ;  for,  although  two  or  three  words  may  suffice  to  express  all
combinations  whatsoever  in  their  most  general  sense,  as  when  the  name  of
thallus  is  given  to  the  simplest  expansion  of  vegetable  matter,  while  all  the
more  complex  forms  are  included  under  the  name  of  axis  and  its  appen-
dages, yet  ingenuity  is  Exhausted  in  the  attempt  to  distinguish  by  appro-
priate terms  the  manifold  external  forms  assumed  by  that  axis  and  the
parts  which  it  bears.
