394  Myricacece  of  Eastern  United  States.  {^Xrf mT' 
texture  of  the  leaves  is  sub-coriaceous.  In  color  the  leaves  have 
blended  the  color  characteristics  of  both  parents.  The  margin  is  more 
incurved  beneath  than  M.  Caroliniensis,  less  than  M.  Cerifera. 
Leaf  Histology. — The  microscopic  characters  of  the  leaf  of  this 
hybrid  are  intermediate  between  those  of  its  parents.  For  instance, 
the  upper  epidermis  is  composed  of  cells  whose  vertical  walls  are  more 
curvilinear  than  M.  cerifera,  less  curvilinear  than  M.  Caroliniensis. 
Their  mean  dimensions  in  surface  view  are  26-7/x  x  16.89/x.  Their 
outer  walls  are  less  projecting  than  those  of  M.  cerifera,  more  so 
than  M.  Caroliniensis.  The  cuticle  is  thinner  than  that  of  M.  cerifera, 
thicker  than  that  of  M.  Caroliniensis.  The  palisade  region  of  the 
mesophyll  is  3-4  layers  wide,  and  so  is  intermediate  between  this 
region  in  M.  cerifera  and  M.  Caroliniensis.  The  lower  epidermis 
consists  of  cells  whose  vertical  walls  are  more  curvilinear  than  those 
of  M.  cerifera,  less  curvilinear  than  those  of  M.  Caroliniensis.  The 
mean  dimensions  of  these  cells  in  surface  view  are  26.46/x  x  13-59/* 
which  is  likewise  an  intermediate  character.  The  stomata  are  fewer 
in  number  than  on  M.  Caroliniensis,  more  numerous  than  on  M. 
cerifera.  The  upper  surface  shows  a  scattering  of  orange- red,  bowl- 
shaped  glands  and  golden-yellow  balloon-shaped  glands,  or  sometimes 
the  latter  only.  The  lower  surface  shows  numerous  orange-red, 
bowl-shaped  and  golden-yellow,  balloon-shaped  glands,  both  of  which 
are  often  fewer  than  on  the  similar  epidermis  of  M.  cerifera.  The 
tendency  for  the  head  of  the  bowl-shaped  gland  in  the  hybrid  to 
become  saucer-shaped  is  very  striking.  Simple  unicellular  trichomes 
and  the  sclerotic  bases  of  these  are  common  on  both  lower  and  upper 
epidermis,  but  intermediate  in  number  between  those,  on  the  leaves 
of  the  parents.  Finally,  the  average  thickness  of  the  lamina  of  the 
hybrid  outside  of  the  mid-rib  is  201. 6fi,  while  that  of  M.  cerifera  is 
268.8/x  and  of  M.  Caroliniensis,  168.96^. 
Inflorescence  and  Flowers. — The  characteristic  inflorescence  is  a 
catkin.  The  catkins  are  partly  formed  the  year  before  flowering 
below  the  leaves  on  last  season's  growing  branches.  The  staminate 
catkins  are  borne  on  different  plants  from  those  which  bear  the 
pistillate  catkins,  and  so  the  plants  are  dioecious.  Both  staminate  and 
pistillate  catkins  possess  orange-red,  bowl-  to  saucer-shaped  and 
golden-yellow,  balloon-shaped  glands  on  the  catkin  axis  as  well  as  the 
bracts.    Other  characters  are  still  under  investigation  by  the  writer. 
Fruits. — The  hybrid  fruits  are  ceriferous  nuts  which  are  inter- 
mediate in  size,  apex,  weight,  and  duration  between  those  of  M.  ceri- 
