506 
Notes  on  the  Dasheen  and  Chayote.  {J 
of  Texas.  It  has  fruited  at  some  points  north  of  this.3  It  is  re- 
ported to  have  been  grown  in  California. 
Histology  of  Fruit. — With  other  cucurbitaceous  fruits,  that  of 
the  chayote  agrees  in  the  fusion  of  the  receptacular  to  the  carpellary 
portions  during  the  developmental  process. 
Fig.  8.    Embryo  of  Chayota  edulis  Jacq.    Note  plumule  (p)  and  inner  sur- 
face of  cotyledons  (c)  which  have  been  spread  apart.    X  1%3- 
Receptacular  Portion. — This  region  constitutes  by  far  the  greater 
portion  of  the  fruit  area.  In  surf  ace  section  (Fig.  n)  the  outer  epi- 
dermal cells  are  polygonal  in  outline  and  richly  protoplasmic.  Many 
of  these  contain  small  prisms  of  calcium  oxalate.    Scattered  all  over 
Fig.  9.  Various  types  of  starch  grains  found  in  the  mesoplwll  cells  of  the 
this  region  and  interspersed  among  the  regular  epidermal  cells  may 
be  noted  small  groups  of  cells,  not  unlike  the  other  cells  in  shape, 
but  having  thicker  walls  and  yellowish  to  light-brown  fixed  oil  con- 
tents.   Stomata  are  also  found  in  moderate  numbers  in  this  region. 
3  Circulars  and  Pamphlets  on  "  The  Dasheen  and  Chayote,"  issued  by  the 
U.  S.  Dept.  of  Agriculture. 
L.  P.  Byars,  "  A  Nematode  Disease  of  the  Dasheen  and  its  Control  by 
Hot  Water  Treatment',"  Phytopathology,  Vol.  7,  No.  1,  Janua^,  1917. 
L.  L.  Harter,  "  Storage-rots  of  Economic  Aroids,"  Jour.  Agric.  Research, 
U.  S.  Dept.  of  Agriculture,  Vol.  6,  No.  15,  July  10,  1916,  pp.  549-572. 
Cha3Tote  cotyledons  (hig] 
;hly  magnified). 
