31 KRAMERIA IXINA 



this is, in itself, strong evidence of the remedial value of Savanilla 

 rhatany. This rhatany has a strong, purely astringent taste ; but 

 like that of Peruvian rhatany is without odour. 



Savanilla rhatany owes its properties, like that of the Peruvian 

 kind, to a form of tannic acid, but the tannin of the two is not 

 identical, as is proved by the varying action of some reagents on 

 the two roots. 



Medical Properties and Uses. Similar in every respect to those 

 of the official or Peruvian Rhatany, for which it might be probably 

 substituted with advantage. 



OTHER KINDS OF RHATANY. Besides the two kinds of rhatany 

 now described, the roots of several other species of Krameria have 

 astringent properties, and have been employed for similar 

 purposes. 



One of these roots has within the last few years found its way 

 to the Continent of Europe, but it is still unknown in the London 

 market ; this kind has been termed Brazilian, Para, or Ceara 

 Rhatany, and also from its colour, Brown Rhatany. It is said to 

 be derived from Krameria argentea, Martius, a native of the 

 eastern provinces of the Brazils. 



Para Rhatany has much resemblance to Savanilla Rhatany, but 

 it has a darker colour, varying in this respect between dark grey 

 and brown, hence its name of Brown Rhatany. The pieces of 

 root are also longer, and are remarkable for their flexibility. 

 The bark is thick and has numerous transverse cracks. 



Fliickiger has recently stated that the three kinds of rhatany 

 now noticed by us may be distinguished by the different colours 

 of their respective alcoholic extracts. Thus, if an alcoholic 

 extract of the three kinds of rhatany be similarly prepared and 

 diluted to an equal strength, the tincture of Peruvian rhatany 

 becomes of a clear reddish colour; that of Savanilla rhatany 

 appears yellowish, with a very faint tinge of green ; and that of 

 Para rhatany gives a perceptibly and purer yellow colour. He also 

 adds, that if the very diluted tinctures of these three kinds of 

 rhatany be mixed with solution of acetate of lead, the precipitate 



