^^2 BOTANY AND PHARMACOGNOSY. 



167. PODOPHYLLUM. Light brown (Fig. 223) ; starch 

 grains somewhat spherical, 5 to 12 /x in diameter, single or 2- to 

 6-compound ; tracheae few, scalariform, spiral, reticulate, or with 

 simple pores. 



168. CHENOPODIUM. Yellowish-brown ; seeds blackish, 

 shiny, reniform, about 150 ^i in diameter ; seed-coat with polygonal, 

 thin-walled pigment cells ; numerous starch grains and small 

 aleurone grains. 



B. STARCH GRAINS FEW OR NONE. 



a. CONTAINING CALCIUM OXALATE. 



a In Rosette Aggregates. 

 I. Small Crystals in Aleurone Grains. 



169. ANISUM. (See No. 68.) 



170. CARUM. Dark brown (Fig. 247) ; calcium oxalate 

 crystals in rosette aggregates, 0.5 to i /x in diameter in aleurone 

 grains ; fragments of light yellow vittas, together with nearly 

 isodiametric or polygonal, yellowish-brown, inner epidermal cells 

 of pericarp ; sclerenchymatous fibers few, thick-walled, slightly 

 lignified, with mnnerous simple pores ; oil globules numerous. 



171. CORIANDRUM. Light brown (Fig. 245); calcium 

 oxalate crystals in rosette aggregates and 3 to 7 /x in diameter in 

 aleurone grains ; fragments of light yellow vittas and long, nar- 

 row, yellowish, inner epidermal cells ; sclerenchymatous cells irreg- 

 ularly curved, yellowish, thick-walled, lignified and with numerous 

 simple pores ; oil globules numerous. 



172. FCENICULUM. (See No. 70.) 



2. Crystals Not Less Than 10 fx in Diameter. 

 * Pollen Grains Niuncrous. 



173. CARYOPHYLLUS. Light brown (Fig. 312); pollen 

 grains tetrahedral, somewhat spherical, with three pores, about 

 15 /x in diameter; calcium oxalate crystals in rosette aggregates 

 10 to 15 /x in diameter, occasionally in crystal fibers; sclerenchy- 

 matous fibers spindle-shaped, thick-walled, strongly lignified and 

 with simple oblique pores; tracheae spiral, thick-walled; oil glob- 



