A hanging Callianthe megapotamica flower has yellow petals beneath a large reddish calyx and a projecting cluster of red stamens with brown anthers

Callianthe megapotamica (Trailing Abutilon)

Native to Rio Grande do Sul in southern Brazil, this perennial scrambling shrub grows about 5 to 8 feet tall, with slender, arching branches. It is deciduous to partly evergreen and has toothed, pointed leaves. Hanging flowers typically have yellow petals, a large red calyx, and projecting stamens. In temperate gardens, it flowers from summer into autumn. It can be propagated from softwood cuttings. Photographed in Bogotá, Colombia.

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A hanging Callianthe megapotamica flower has red-veined yellow petals beneath a red calyx and orange pollen-covered anthers

A red-flowered Callianthe megapotamica has scarlet petals beneath a pink-red calyx and projecting stamens beside a closed bud

A Callianthe megapotamica flower has yellow petals, a dark red calyx, and projecting stamens beside two closed red buds

Callianthe megapotamica flowers have red-veined yellow petals beneath dark red calyces beside closed buds and toothed green leaves

A close view of a Callianthe megapotamica flower shows orange pollen on anthers beneath red-veined yellow petals

A spreading Callianthe megapotamica shrub bears many hanging red-and-yellow flowers above variegated groundcover with purple flowers

Callianthe megapotamica forms a sprawling shrub scattered with hanging red and yellow flowers