POWDERED DRUGS. 
271 
Ducts large and with bordered pores . . 106. Ciruicifuga 
Thick-walled parenchyma with simple pores, 
107. Cypripedium 
Scalariform ducts 108. Leptandra 
Spiral ducts 109. Spigelia 
ft Starch grains 5-15 or 20 m in diameter. 
Fragments of milk vessels 110. Apocynum 
Raphides 45 long 111. Convallaria 
Raphides 6-8 m long 112. Sarsaparilla 
Ducts with bordered pores 113. Sumbul 
Stone cells characteristic 114. Valeriana 
** Ducts few or none. 
Characteristic bast fibers 115. Cinchona 
Raphides about 5 ^ long 116. Cinnamomum 
Short sclerenchymatous fibers 117. Coffee 
Starch grains 7-20 /*, compound 118. Sassafras 
2. Sclerenchymatous fibers wanting. 
* Stone cells present. 
f Giving tannin reaction with ferric salts. 
Stone cells characteristic 119. Cacao 
Altered starch grains 120. Guarana 
Stone cells characteristic 121. Piper 
Tliick-walled endosperm cells . . . 122. Colchici Semen 
ft Not becoming blue or green with ferric salts. 
Starch grains 4-12 /j. 123. Aconitum 
Starch grains 25-40 m 124. Physostigma 
** Stone cells wanting. 
Stone cells few 125. Aconitum 
Starch grains 7-20 /t 126. Colchici Corrnis 
Altered starch grains 127. Guarana 
Amylo-dextrin grains 128. Macis 
Numerous oil globules 128. Myristica 
Few fragments of vegetable tissues .... 129. Opium 
Starch grains 5-12 m 130. Podophyllum 
B. Starch grains few or none. 
a. Containing calcium oxalate. 
« In rosette-shaped crystals. 
1. Small crystals in aleurone grains. 
With non-secretion hairs 131. Anisum 
Calcium oxalate 0 - 5-l,u 132. Carum 
Calcium oxalate 3-7 n 133. Coriandrum 
Calcium oxalate 1-2 m 134. Foeniculum 
. 2. Crystals not lesa than 10 ^ in diameter. 
* Pollen grains numerous. 
