Ipomoea consists of the dried tuberous roots of Ipomoea orizabensis Ledenois., belonging to family Convolvulacae.
IPOMOEA
Synonyms
Radix ipomoeae, Orizaba jalap root, Mexican scammony root,
Mexican scammony, Ipomoea radix.
Biological Source
Ipomoea consists of the dried tuberous roots of Ipomoea orizabensis Ledenois., belonging to family Convolvulacae.
Geographical Source
It is mainly found in Mexico (Orizabs), Mexican Andes.
Collection
Ipomoea is perennial climbing twinner. It produces a large,
woody and tuberous root. The Roots are dug, washed, cut into slices and dried.
Characteristics
Ipomoea roots are large and fusiform, with 3 to 10 cm thick
and about 20 cm long. They occur as irregular pieces, greyish brown in colour,
with slight odour and slight acrid taste.
Microscopy
The cork is thin-walled cells, which is lignified. The parenchyma
consists of numerous latex cells, starch grains, and calcium oxalate crystals.
The starch occurs in group of two to six compounds, the calcium oxalate present
is of prismatic type. In the middle it has the primary xylem surrounded by the
secondary xylem. The vascular bundles are also present in numerous amounts,
Chemical Constituents
Ipomoea consist of 10 to 20% resin, volatile oil and some
fatty acids. The resin has an ether soluble portion and ether insoluble
portion. Both the portions contain jalapin; a mixture of acidic glycosides.
Ether soluble portion has jalapinolic acid, whereas in ether insoluble part it
has hydroxy fatty acids, that is, ipurolic acid and convolvullinic acid.
Uses
Ipomoea resin is strong cathartic.
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