720 SCIENTIFIC AND APPLIED PHARMACOGNOSY 



* Tracheae numerous. Continued. 



ft Starch grains 5 to 15 or 20 /i in diameter. 



Characteristic starch grains. .. .143. Zingiber 



Odor of coumarin 144. Tonka 



Chocolate taste 145. Cocoa Shells 



Fragments of milk vessels 146. Apocynum 



Raphides 45 M long 147. Convallaria 



Raphides 6 to 8 M long 148. Sarsaparilla 



Ducts with bordered pores 149. Sumbul 



Stone cells characteristic 150. Valeriana 



Stone cells 151. Methysticum 



** Tracheae few or none. 



Characteristic bast fibers 152. Cinchona 



Raphides about 5 M long 153. Cinnamomum 



hort sclerenchymatous fibers 154. Coffee 



Starch grains 7 to 20 n, compound . . . 155. Sassafras 



2. Sclerenchymatous fibers wanting. 



* Stone cells present. - . 



f Giving tannin reaction with ferric salts. 



Stone cells characteristic 156. Cacao 



Altered starch grains 157. Guarana 



Stone cells characteristic 158. Piper 



Thick-walled endosperm cells. 



159. Colchici Semen 



ft Not becoming blue or green with ferric salts. 



Starch grains 4 to 12 p 160. Aconitum 



Starch grains 25 to 40 M 161. Physostigma 



** Stone cells wanting. 



Starch grains 7 to 20 162. Colchici Cormus 



Altered starch grains 163. Guarana 



Numerous oil globules 164. Myristica 



Amylo-dextrin starch grains 165. Macis 



Few fragments of vegetable tissue 166. Opium 



Starch grains 5 to 12 M 167. Podophyllum 



Odor characteristic 168. ChenoDodium 



B. STARCH GRAINS FEW OR NONE. 



v 



a. Containing calcium oxalate. 

 a In rosette aggregates. 



1. Small crystals in aleurone grains. 



With non-glandular hairs 169. Anisum 



Calcium oxalate 0.5 to 1 n 170. Carum 



Calcium oxalate 3 to 7 n 171. Coriandrum 



Calcium oxalate 1 to 2 M 172. Foeniculum 



