98 
PHARMACEUTICAL BOTANY 
Various Kinds of Cell Walls and Behavior of Each to Micro- 
Chemic Reagents 
Nature of wall 
- r 
Where found 
' 
Reagent and behavior toward same 
Cellulose. 
1 
) 
Parenchyme cells, tri- 
chomes such as 
cotton, etc. 
Cuoxam dissolves it. Chlorzinc- 
iodine solution imparts a blue or vio¬ 
let color. Iodine solution followed 
by sulphuric acid colors it blue. 
Lignocellulose 
(Lignified wall). 
Wo o d y parts of 
plants, such as stem 
cells, bast fibers, 
wood fibers, etc. 
Phloroglucin with HC 1 imparts a red 
color except to bast fibers of flax. 
Corallin-soda solution imparts pink 
color. Aniline sulphate with H2SO4 
colors it a golden-yellow. Chlorzinc- 
iodine imparts a yellow color. 
Reserve cellulose 
Found in certain seeds 
such as nux vomica, 
ignatia, ivory nut, date, 
coffee, etc. 
As for cellulose. 
Mucilaginous 
modification of 
cellulose. 
In various parts of 
plants. 
Alcoholic or glycerin solution of meth¬ 
ylene-blue imparts a blue color. 
\ 
Suberized walls.. 
In cork, wounded 
areas of plants, endo- 
dermis. 
Alcoholic extract of chlorophyll, in the 
dark, imparts a green color. Alcannin 
and Sudan III impart a red colora¬ 
tion. Converted into yellowish drop¬ 
lets and granular masses upon heat¬ 
ing with a strong solution of KOH. 
Sulpd^ric acid is resisted. 
Cutinized walls.. 
Forming outer walls 
of many epidermal 
cells. 
As for suberized walls. 
Callus of sieve 
plates. 
Silicified walls . . 
Plates of sieve tubes. 
Epidermis of Equi- 
setacese, Graminese, 
etc.; Diatoms. 
Corallin-soda solution imparts pink 
color. 
Soluble in hydrofluoric acid. 
