BRAYERA 



225 



glandular trichomes, one-celled, curved: few ellipsoidal pollen grains with 3 pores. 

 Powder seldom dispensed. 



CONSTITUENTS. The chief constituents are kosotoxin (amorphous), a muscle 

 poison, and protokosin (crystalline), inactive. Kosotoxin with baryta water 

 yields a neutral body said to be identical with commercial kosin, an active 

 principle soluble in alkalies; a neutral principle, Koussein (dose: 15 to 30 



FIG. 119. Hagenia abyssinica Flowering branch, and male and female flowers. 



gr.) is rnarketed; tannin 24 per cent., and a tasteless and an acrid resin. 

 not more than 9 per cent. 



Ash, 



Preparation of Kosin. Heat cusso repeatedly with alcohol to which calcium 

 hydrate has been added, boil residue with water, mix liquids, filter, and distil. 

 Kosin is then precipitated by treating the solution with acetic acid. Is in floccu- 

 lent form, soon becoming dense and resin -like. Purified by crystallization. 



ACTION AND USES. Taenifuge. Dose: 15 Gm. (240 gr.). 



Fluidextractum Cusso (U.S.P. 1890),. .Dose: I to 4 fl. dr. (4 to 15 mils). 



223. TORMENTILLA. TORMENTIL. The rhizome of PotentU'la tormentiria 



Sibthorp. Habitat: Europe. Large, somewhat fusiform, longitudinally 

 15 



