524 POWDERED DRUGS 



460. JALAPA 



Powder. Light brown; starch grains, numerous, simple or 2 to 4 compound 

 ellipsoidal to ovoid (4 to 35 /n in diam.); often swollen and somewhat altered; cal- 

 cium oxalate in rosettes (10 to 40 n in diam.) ; tracheae with simple or bordered pits; 

 laticiferous vessels containing yellowish-brown masses. (See Fig. 299.) 



264. LINUM 



Powder. Lemon yellow to light brown ; the seed coat has tabular pigment cells, 

 filled with reddish-brown insoluble substance; stone cells elongated and yellowish; 

 oil globules numerous; aleurone grains, numerous (2 to 20 /* in diam.). 



0-52. LOBELIA 



Powder. Dark green; cells of seed coat more or less polygonal, walls thick and 

 yellowish ; f ew non-glandular hairs (30 to 60 /z long) ; tracheas annular, spiral or 

 reticulate, accompanied by narrow thin- walled wood fibers; leaf epidermis with 

 elliptical stomata about 25 p long and with 3 to 4 neighboring cells; pollen grains 

 nearly spherical about 25 p in diam. 



18. LYCOPODIUM 



The spores are sperical tetrahedrons (25 to 40 n in diam.) with the outer walls 

 extended into irregular projections. 



599. MATRICARIA 



Powder. Yellowish to yellowish-green; fpollen grains numerous, spinose, 

 varying from nearly spherical to triangular (about 20 ju in diam.); glandular hairs 

 from the corolla, and cells of the anthers are characteristic; few sclerenchyma fibers. 



473. MENTHA PIPERITA 



Powder. Dark green; non-glandular hairs I to 8-celled; glandular hairs with 

 stalks I or 3-celled and I to 8-celled heads; pollen grains nearly spherical, smooth 

 (about 30 n in diam.); trachea?, spiral or with simple or bordered pits; thin-walled 

 sclerenchyma fibers, few. 



474. MENTHA VIRIDIS 

 Powder. Similar in structure to Mentha Piperita. 



365. MEZEREUM 



Powder. Light grayish-brown ; numerous long bast fibers (400 to 3000 p long) 

 somewhat uneven and bent, non-lignified; cork cells yellowish-brown; starch grains, 

 few, simple or 2 to 4 compound (3 to 15 n in diam.). 



154. MYRISTICA 



Powder. Dark reddish-brown; perisperm of thin-walled parenchyma cells in 

 which are large oil reservoirs; endosperm of parenchyma filled with starch and 

 aleurone grains; starch, simple or compound, spherical to polygonal (3 to 20 n in 

 diam.); few small spiral tracheae; oil globules numerous. 



294. MYRRHA 



Powder. Yellowish-brown; mounted in fixed oil shows angular fragments; 

 when cleared and stained in chloral hydrate iodine a few spherical or irregular 

 starch grains (10 to 35 n in diam.) may appear; when tested with phloroglucin may 

 show fragments of sclerenchyma fibers or stone cells. (See Fig. 302.) 



435. NUXVOMICA 



Powder. Light gray; endosperm cells thick- walled, containing oil globules and 

 aleurone grains; numerous non-glandular, lignified hairs having pitted walls; cells 

 of adhering fruit pulp may show few small spherical starch grains. (See Fig. 302 .) 



1 80. OPII PULVIS 



Powder. Light brown; consists of irregular granular fragments; epidermis of 

 poppy capsuls 4 to 5-sided or elongated, thick-walled and lignified; fragments of 

 poppy leaves and rumex fruits. 



548. PEPO 



Powder. Whitish or yellowish; outer epidermis palisade-like, cells up to I 

 mm. long; stone cells variable in size and thickness of walls up to 75 n long; paren- 

 chyma cells with peculiar reticulate markings or rather thick- walled and somewhat 



