CONVOLVULACE, 039 
talline structure; we only ‘detected’ minute «globules. » The 
queous solution was strongly acid in reaction, and gave with 
ferric chloride a dirty greenish coloration, with lime water a 
bright yellow coloration, and with basic acetate of lead a 
| phur-yellow precipitate. . This principle, soluble in water, 
and reprecipitated on cooling, is probably ‘allied to the Quer- 
‘itrin group of principles. That portion of the residue insoluble 
m water, was in properties similar to the resin dissolved by 
benzole. ees 7 
: The aqueous acid solution was lastly rendered alkaline. and 
gitated with ether. The ethereal extract was nof more 
han a trace, but afforded all the reactions ina marked degree 
f an alkaloidal principle. . . 
Phe leaves also afforded marked evidence of the presence of 
Ikaloidal principle soluble in ether, and probably similar 
one we detected in the roots. 
veral othor species of Ipemea are considered by the natives 
ia to have medicinal properties. I. reniformis, Chovs., 
Pl. Ind. 77, t. 30, f- 1, is said to be deobstruent and 
the jaice is administered im rat-bite, and is ‘supposed — 
anciful than real, though, like others of the genus, it is 
ive if taken in large doses. | 
scription.—Stem creeping and rooting ; Jeaves kidney- 
waved, and dentate on the margin, obtuse ; petioles 
duncles very short, 1 te 2-flowered ; corolla small, 
Common in places where water has lodged ; flowers in 
ther. At alittle distance the plant has the appear- 
tyle'asiatica, = fist | Se 
Sweet., Burm. FI, Ind. 45, ¢. 18, f. 1, isa large | . 
ant, with cordate, palmately 5-cleft leaves, 2 
low flowers, the juice of which is consi 
‘and is administere 
