Quote wiki....."Cochliasanthus caracalla, has highly fragrant,multicolored, corkscrew or spiral shaped flowers and is not an invasive plant.
the flowers are white with purple streaks that
fade to cream and then to yellow with age. They hang in twelve-inch long
clusters.[The flowers are extremely wavy and immature blossoms very much resemble
multicolored spirals or corkscrews. This plant grows white buds that
produce nectar, which attracts ants, who then pollinate the flowers. The
fragrance has been likened to Chinese wisteria, Jasmine, and Magnolia.
It is claimed that the plant can be smelled from 15 feet away."
Quote wiki...."Phaseolus giganteus, has non-fragrant flowers that are a solid, pale purple. The flowers, which grow alone or in small groups rather than in clusters, consist of four petals: one large wavy
half-circle on the top, two tear-drop shaped petals that point inwards,
and a thin, erect, curly petal sprouting from the center of the flower.
Depending on the angle, the two bottom petals can appear to be a single
petal that strongly resembles the large, upper petal. When this happens,
the three main petals come together to form an open-clam shape. The
center of the flower and the end of the thin, erect may have a small
area of yellow and/or white but the color is usually faint and only
noticeable upon close examination.
This invasive vine has taken over a fence and is now spreading across the ground.
Immature flower buds often form fat half-crescents but, unlike the
corkscrew vine, these buds are green, yellow, or brown. This plant might
be more susceptible to aphids but is definitely invasive and has been
compared by multiple growers to kudzu. Rapid growth combined with the ability of vines touching the ground to take root make this an invasive plant.This plant has been known to regrow even after all foliage visible above ground has died from frost."
Regarding the Vigna caracalla (corkscrew vine), can it be grown and bloom in an indoor atrium (not glass; partial light roof that opens and closes)? Would it need ants to pollinate in order to bloom (a scary thought!)? I am concerned about setting it outdoors in my English flower garden as it might get out of hand and take over, or I cannot catch all of the seeds and it self-sows all over the place! Help?
@sleighty - the snail vine grows in South America and grows in USDA zones 9 t0 11. Most of the UK is USDA zones 7 to 9. Only coastal areas are warm enough for it to have any chance of surviving outside, so unless you live somewhere that never experiences any frost, any seedlings would be killed over winter. You would need to bring the plant inside if you wanted to keep it from year to year.
One site I saw suggested growing it in a hanging basket, but you would have to keep it trimmed as it can grow to 15 ft. Living where I do I would be surprised if it made 15 inches!
Posts
Corkscrew Vine (Vigna caracalla)?
I believe you need to know if they are scented or not.
One is invasive the other not.
1. Cochliasanthus caracalla.....common name corkscrew vine.
https://www.google.co.uk/search?q=cochliasanthus+caracalla&client=firefox-b&dcr=0&source=lnms&tbm=isch&sa=X&ved=0ahUKEwikifPfmLfaAhXLI8AKHe-LBAAQ_AUICygC&biw=1920&bih=943
Quote wiki....."Cochliasanthus caracalla, has highly fragrant,multicolored, corkscrew or spiral shaped flowers and is not an invasive plant.
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AND
2. Phaseolus giganteus.....common name snail vine.
https://www.google.co.uk/search?q=Phaseolus+giganteus,&client=firefox-b&dcr=0&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjZwOenl7faAhWqIcAKHXRkCeAQ_AUICigB&biw=1920&bih=943
Quote wiki...."Phaseolus giganteus, has non-fragrant flowers that are a solid, pale purple. The flowers, which grow alone or in small groups rather than in clusters, consist of four petals: one large wavy half-circle on the top, two tear-drop shaped petals that point inwards, and a thin, erect, curly petal sprouting from the center of the flower. Depending on the angle, the two bottom petals can appear to be a single petal that strongly resembles the large, upper petal. When this happens, the three main petals come together to form an open-clam shape. The center of the flower and the end of the thin, erect may have a small area of yellow and/or white but the color is usually faint and only noticeable upon close examination.
Immature flower buds often form fat half-crescents but, unlike the corkscrew vine, these buds are green, yellow, or brown. This plant might be more susceptible to aphids but is definitely invasive and has been compared by multiple growers to kudzu. Rapid growth combined with the ability of vines touching the ground to take root make this an invasive plant.This plant has been known to regrow even after all foliage visible above ground has died from frost."
People may not see it under this thread title
I live in west central Scotland - not where that photo is...