Answer: Vigna caracalla, also sold as Phaseolus giganteus, is a twining perennial vine that can grow to 20 feet. This fast-growing vine is often used as a bank cover or ground cover. It can also be grown up a trellis to add
color and fragrance to a garden or patio. Its fragrant white or yellow flowers are
unusual both for their "snail" shape and their violet blush
color. It grows well in full sun and average soil.
A wholesale source that may be able to tell you who carries the seeds is Royal Lane Nursery, Inc. - Fruitvale, TX - 903/896-4485
I also found seeds available at the garden shop at Monticello. You can reach them on-line at http://www.monticello.org. Good luck!
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