no 
Cassaba  and  Honey  Dew  Melons. 
(Am.  Jour.  Pharm. 
1  February,  1921. 
243.2  microns  in  length  are  to  be  observed  as  outgrowths  of  the 
epiearp.  Each  of  these  (Fig.  7)  is  composed  of  4-5  cells.  The  basal 
cell  of  the  hair  is  characterized  by  an  irregular  thickening  of  its 
wall,  while  the  distal  cell  shows  a  curved,  sharp-pointed  summit. 
Numerous  circular  scars  are  also  evident  in  this  region.  (See  Fig. 
6A.)  These  represent  the  bases  of  the  non-glandular  hairs  which 
have  become  detached.  The  epiearp  cells  bordering  upon  them  are 
arranged  in  radiate  fashion. 
2.  The  mesocarp  (Fig.  5  mes.)  is  composed  of  a  matrix  of 
fundamental  parenchyma  whose  walls  are  characteristically  pitted. 
The  parenchyma  cells  are  smallest  in  the  outer  regions,  but  gradu- 
ally increase  in  size  toward  the  endocarp.  The  intercellular-air- 
spaces are  also  the  largest  in  the  inner  part  of  this  region.  Cours- 
ing through  the  mesocarp  are  numerous  fibrovascular  bundles  of 
the  bi-collateral  type  with  prominent  sieve  tubes  and  spiral  tracheae. 
The  latter  may  attain  a  diameter  of  25.66  microns.  Accompanying 
the  bundles,  especially  in  the  inner  regions,  will  be  observed  numer- 
ous branching  and  anastomosing  lacticiferous  vessels. 
3.  The  endocarp  adheres  to  the  seeds  as  a  thin  membrane. 
SEED   (FIG.  8). 
1.  Spermoderm,  consisting  of  (1)  a  palisade  epidermis  (ep) 
with  longitudinal  ribs  strengthening  the  radial  walls.  These  are  slen- 
der and  unbranched  and  up  to  156  microns  in  length.  The  cells  of  the 
Fig.  6.  A.  Circular  scar  (s),  representing  base  of  non-glandular  hair  detached  from 
epiearp  of  Cassaba  Melon.  Note  the  epiearp  cells  (ep)  arranged  around  it  in  radiate 
fashion.  B.  Stomatal  apparatus  of  epiearp  of  Cassaba  Melon.  Stoma  (s) ;  guard  cells  (g) ; 
neighboring  cells  (n),  (greatly  magnified). 
epidermis  contain  a  number  of  small  spheroidal  to  angular  starch 
grains.  Upon  coming  in  contact  with  water  their  outer  walls,  con- 
sisting of  a  mucilaginous  modification  of  cellulose,  are  changed  to 
mucilage. 
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