66 
PHARMACEUTICAL BOTANY 
Various Kinds of Cell Walls and Behavior of Each to 
Micro-Chemic Reagents 
Nature of wall 
Where found 
Reagent and behavior toward same 
Cellulose 
Parenchyme cells, tri- 
chomes such as 
cotton, etc. 
Cuoxam dissolves it. Chlorzinc- 
iodine solution imparts a blue or violet 
color. Iodine solution followed by 
sulphuric acid colors it blue. 
■ 
Lignocellulose 
(Lignified wall). 
Woody 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, 
ivory nut, date, cof- 
fee, 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 heating 
with a strong solution of KOH. 
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- 
setaceae, Grammes, 
etc.; Diatoms. 
Corallin-soda solution imparts pink 
color. 
Soluble in hydrofluoric acid. 
