300 
PHARMA COONOSY. 
121. Piper. — Dark brown; stone cells nearly isodia- 
metric, uniformly thickened or with only three walls 
thickened, the contents yellowish-brown tannin masses, 
giving a blue reaction with ferric ammonium sulphate 
solution ; starch grains spherical, 1 to 2 ^ in diameter ; 
parenchyma with remains of chromoplastids and red- 
dish-brown tannin masses ; oil-secretion cells with 
suberized walls; oil globules numerous; ash not more 
than 6 per cent. 
In the powder of the endocarp of Olive Fruit \_Olea 
Extropeea (Fam. Oleaceee)], the lumen of the stone cells is 
tilled with air. 
122. Colchici Semen. — Light or dark brown; scleren- 
chymatous cells with pigment soluble in potassium 
hydrate solution, and reacting with iron salts some- 
what like tannin ; cells of endosperm thick-walled, with 
simple pores and few oil globules; parenchymatous 
cells of strophiole thin-walled, and with numerous 
nearly spherical starch grains 7 to 15 p in diameter. 
ft Not Becoming Blue or Green with Ferric Salts. 
123. Aconitum. — Dark brown; ducts few, spiral, sca- 
lariform, reticulate, or with simple pores; stone cells 
nearly isodiametric, variously thickened, associated 
with thick-walled parenchyma, the latter swelling in 
water; starch grains somewhat spherical, 4 to 12 p in 
diameter, single or two to four-compound. 
124. Physostigma. — Brownish black ; taste starchy ; 
stone cells nearly isodiametric or elongated, the con- 
tents reddened by alkalies ; starch grains ellipsoidal, 
about 25 to 40 p in diameter ; oil globules numerous. 
** STONE CELLS WANTING. 
125. Aconitum. — Stone cells few. (See No. 123.) 
126. Colchici Cormis. — Light or dark brown ; starch 
grains irregularly spherical or ovoid, 7 to 20 p in diam- 
