Jalap has a fleshy, tuberous root, with numerous roundish tubercles. It has several stems, which are smooth, brownish, slightly rough, with a tendency to twine. The leaves are on long petioles, the first hastate, succeeding ones cordate, acuminate, and mucronate. The calyx has no bracts; corolla funnel-shaped, purple, and long. Fruit a capsule.
Ipomoea purga (Jalap)
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