The tincture resulting is clear, and of a slightly brownish-orange color, Its 
odor is very like that of Rhubarb; its taste sharply astringent and bitter, and 
reaction acid. 7 
florida only in the fact that it remains associated with tannin in spite of most care 
~ ful re-crystallization, and other means of purification.* | 
The other constituents mentioned in the preceding species are all, with 
doubt, duplicated in this. Gibson isolated sugar, coloring-matter, co 1 
tannin. : | | 
PHYSIOLOGICAL ACTION.—Here again great similarity exists between the 
species. C. circinata causes drowsiness and depression of spirits; congestio 
the head; nausea and faintness; flatulency ; copious bilious stools and urine, 
yellowness of the sclera, face and hands; coldness of the extremties ; itching, 
rash, upon the whole surface, especially the trunk, with flashes of 
followed by perspiration. aS : as . 
_ DESCRIPTION oF PLATE 72. 
| of a flowering branch, Binghamton, N.Y., June 16th, 
_ 6, Portion of the stem 
