272 
PHARMA COGNOSY. 
Crystals numerous . 135. Caryophyllus 
Crystals few • • . . 136. Insect Powder 
** Pollen grains few. 
f Ducts present. 
Secretion and non-secretion hairs 137. Cusso 
ft Ducts wanting. 
Stone cells few 138. Viburnum Opulus 
Stone cells numerous . . . 139. Viburnum Prunifolium 
j8 Calcium oxalate in monoclinic prisms. 
1. Numerous seeds. 
Characteristic odor 140. Vanilla 
2. Seeds wanting. 
Stone cells few 141. Viburnum Opulus 
Stone cells numerous, characteristic, 
142. Viburnum Prunifolium 
Numerous oil globules 143. Xanthoxylum 
y Calcium oxalate in crystal fibers. 
Stone cells characteristic 144. Quercus Alba 
b. Calcium oxalate wanting, 
a Containing pollen grains. 
Non-secretion hairs numerous. - . . 145. Arnicse Flores 
Spherical pollen grains 146. Crocus 
Non-secretion hairs few 147. Santonica 
P Pollen grains wanting. 
1. Stone cells numerous. 
Fragments wine-colored with sulphuric acid . 149. Cubeba 
2. Stone cells wanting. 
Non-lignified intermediate fibers .... 150. Gentiana 
Few fragments of tissues 151. Opium 
Ducts reticulate 152. Pyrethrum 
Fragments of milk-vessels 153. Taraxacum 
Ducts spiral, annular or with simple pores . 154. Triticum 
II. Without Fibrovascular Tissue. 
A. With cellular tissues. 
Spores about 7 u 155. Ustilago 
Numerous oil globules 156. Ergota 
Few or no fragments of tissues 157. Opium 
B. Without cellular tissues. 
a. Possessing oil. 
Grayish fragments 158. Asafetida 
Yellowish or yellowish-brown fragments . 169. Myrrha 
b. Without oil. 
a Remain opaque in glycerin. 
