402 POWDERED VEGETABLE DRUGS 



128. LINUM. Flaxseed. U. S. 

 Flaxseed cake (cake meal). Flaxseed meal. 



Linseed, E. Leinsamen, Flachssamen, G . Semence (Graine) de lin, Fr. 



The seeds of Linum usitatissimum L., Linaceae. 



Light brown to brown. 



Linseed oil odor; rancid odor when old. 



Bland oily, bitterish, somewhat mucilaginous. 



Epidermal cells prismatic, with mucilage. A layer of elongated 

 sclerenchyma fibers. A layer of small rectangular, deep brown cells. 

 Endosperm cells thin-walled, filled with proteid granules and fat. 

 No starch in ripe seeds. In the unripe seeds the perisperm paren- 

 chyma cells contain simple spherical starch granules, mingled with the 

 oil globules. 



Ash 6 per cent. 



The meal may be adulterated with flour, corn meal, starches and 

 ground cake meal. 



129. (Fig. 129.) LOBELIA. Lobelia. U. S. 

 Fl. ex. 60. Tinct. 40. 



Indian tobacco, E. Lobelienkraut, G. Herbe de lobelie enfle'e, Fr. 



The leaves and flowering tops of Lobelia inflata L., Lobeliacese. 



Grayish green. 



Fragrant; heavy, narcotic, recalling tobacco. 



Pungent. 



Vertical walls of upper epidermal cells of the leaf linear, thick, 

 very porous; cuticle linearly marked. Lower epidermal tissue with 

 stomata, vertical walls thin, wavy. Large, single celled, simple, 

 rather thin-walled, conical trichomes, upper portion narrowed, with 

 slight cuticular markings. Prismatic crystals of calcium oxalate. 



Ash 10 per cent. 



The most common adulterant is the basal stems and leaves, in- 

 dicated by an excess of fibrous tissue. 



