- SOLANALS. 211 BINDWEEDS, 
- I. operculata Martius. - 
Stem quadrangular, winged, smooth ; leaves palmate, smooth ; peduncles 
1-flowered, longer fan the petiole ; sepals orbicular, the outer large ; 
__ corolla long, tubular, white ; capsule operculate. 
Habitat. Brazil. 
Quality and Uses. Like those of jalap, but weaker. 
L. macrorhiza Michaux. Convolvulus Jalapa Linneeus, 
his plant, inhabiting the sandy soil of Georgia and Carolina, with white insipid 
farinaceous roots weighing from 40 to 50 Ibs., is said to possess no pur- 
gative properties whatever. Dr. Baldwin administered six drachms of 
the powdered root without effect ; in fact it contains little or no resin, 
but like Batatas consists chiefly of saccharine and farinaceous matter. 
Exoconium. Choisy. 
Calyx naked. Corolla tubular. Stamens prominent. Stigma capitate. 
Ovary 2-celled, 4-seeded. 
. E. Purga Bentham.—(Trvz Jantar.) Fig. 286. 
aves cordate, acumi- — 
nate, smooth ; pe- 
duncles 2-flowered; 
Sepals smooth, the 
outer shortest; co- ‘ 
—Yolla large, crim- 
son, hypocrateri- 
form;root tuberous. ‘ 
abitat. Mexico, near 
pe 
Quality. “A powerful dras- 
tie tive, 
nstipation, worm cases, 
Water in the brain, dropsies, 
_ Yetention of the catamenia. 
$68, 
~ Bavaras. Rumphius. 
aly naked. Stigmas 2, capi- 
fate. Ovary 4-celled. 
* ». edulis Choisy. Convoloulus 
Batatas Linneus. — (Sweer 
Porato.) 
Stem creeping widely ; leaves cor- 
_ Mate, acute, angular, stalked ; 
peduncles longer than the pe- 
Wole, 3-4-flowered ; sepals 
_‘Mueronate; corolla large, pur- 
‘Me; root very large, tuberous. 
Mat. East Indies ; cultivated in all 
tropical sorintrieg: —— 
Sweet, nutritive, laxative. 
e tubers are 
* food in all hot scale where they occupy the place of potatoes Coli 
- Fig. 286.—Flower and leaf rs Exogonium Purga. — 
: r 
