ipomoea

A remarkable Morning Glory native to arid regions of Argentina. Like other caudiciform species, it has swollen stems containing water-storage tissue, and can survive extended periods of drought. Give it a well-drained soil, keep it moist and keep it out of the full sun. The caudex will grow to more than 2 ft, the vines reach for more than 12 ft. The bell-shaped flowers are pink. The plant is very showy; it can be kept in a pot as a bonsai and is easy to control as a container specimen, just needs a little trellis, otr can be pruned. Fast growing.
See picture of plants with caudex

Very unusual ipomoea that forms a large caudex. See picture of plants

Merremia dissecta, Ipomoea sinuata, Convolvulus dissectus. Alamo Vine, White Convolvulus, Woodrose. Origin: South America. Alamo Vine is an unusual white perennial Morning Glory that opens around noon and then closes before sunset. Leaves are feathery that makes it an attractive ornamental vine, with fine texture and fast but compact growing habit, great for containers or trellises. Seeds germinate readily.

Prince Kuhio Vine. The great ornamental features are beautiful foliage and the flowers. The leaves are palmately divided into five to seven segments, and are very attractive smooth green color. The noticeable long red-purplish flowers are in groups. Even before the flowers emerge the buds are a positive feature, because they look like small berries.