288 
PHARMA COGNOSY. 
55. Calendula. — Bright yellow ; epidermal cells long, 
narrow, with numerous globules and irregular chromo- 
plastids, walls somewhat sinuate ; pollen grains spheri- 
cal, with numerous centrifugal projections, three-pored, 
about 40 i-L in diameter ; non-secretion hairs consisting 
of a double row of cells and with a single or two-celled 
apex ; calcium oxalate in rosette-shaped crystals about 
4 fjb in diameter. 
56. Foenicnlum. — Yellowish brown; calcium oxalate 
in rosette- shaped crystals 1 to 2 p in diameter, in aleu- 
rone grains 3 to 6 jx in diameter ; fragments of vittse 
and short, narrow, yellowish-brown epidermal cells of 
pericarp ; sclerenchymatous fibers few, thick-walled, 
with oblique pores ; parenchymatous cells slightly 
elongated or thick-walled, with numerous simple pores, 
occasionally reticulately thickened ; oil globules nu- 
merous. 
/3 IN MONOCLINIC PRISMS. 
57. Aurantii Amari Cortex.— Dark yellow; parenchy- 
matous cells either somewhat collenchymatous or with 
simple pores, walls 10 to 15 fx thick; calcium oxalate 
in monoclinic prisms 15 to 20 //■ in diameter ; ducts few, 
spiral, annular or with simple pores. 
57a. Aurantii Dulcis Cortex. — Light brown; calcium 
oxalate in monoclinic prisms 20 to 30 in diameter; 
walls of parenchymatous cells about 4 fx thick. 
7 IN RAPHIDES. 
58. Scilla. — Light yellow ; calcium oxalate mostly in 
rapliides from 01 to 1 mm. in length; few ducts and 
fragments of epidermis. 
b. Calcium-Oxalate Crystals Wanting-. 
a STONE CELLS PRESENT. 
59. Colocynthis. — Light yellow ; stone cells isodiamet- 
ric, slightly thickened, non-lignified, with large simple 
