Love-In-A-Puff (Cardiospermum halicacabum) — identification, habitat & look-alikes

Balloon vine, also called love-in-a-puff, is a climbing vine in the soapberry family grown for its papery, inflated green pods. Each black seed carries a white, heart-shaped spot, which gives the genus its name. In the United States it is an introduced plant that has spread through much of the South and beyond, and several states list it as a .

Appearance

Growth form: A many-branched vine that climbs with forked , reaching up to about 10 ft (3 m).
Leaves: Leaves are divided into toothed, pointed leaflets about 1–1.5 in (2–4 cm) long.
Flowers: Tiny whitish flowers with four petals, each only about 1/6 in (4 mm) long, and not very showy.
Flowering time: Blooms from summer into fall; in Michigan, July to August.
Fruit: A thin, papery, three-chambered pod about 1.25–1.75 in (3–4.5 cm) across. It turns from green to brown as it ripens, from August to October in Michigan.

Look-alikes

GroundcherriesPhysalis

Groundcherries have simple, unlobed leaves and do not climb with tendrils. Balloon vine has leaves divided into toothed leaflets and climbs with forked tendrils.

Why they get mixed upBoth have fruit wrapped in a papery, lantern-like husk.

Virgin's bowerClematis virginiana

Virgin's bower flowers have no true petals, its leaves are divided only once, and it has no forked tendrils. It does not make balloon-like pods.

Why they get mixed upBoth are climbing vines with small white flowers and divided leaves.

Goldenrain treeKoelreuteria paniculata

Goldenrain tree is a tree that can grow tall and has yellow flowers in late spring or early summer. Balloon vine is a soft climbing vine with tiny white flowers.

Why they get mixed upBoth are in the soapberry family and carry papery, inflated pods with round black seeds.

Where it lives

Typical habitats: Moist thickets
Riverbanks
Roadsides
Disturbed ground
Range: It now grows throughout the world's tropics and subtropics; many sources give tropical America as its original home, though accounts differ. In the US it has spread across the Southeast from Virginia to Georgia and Texas, west to Oklahoma and Kansas, and north as far as Michigan, New York, and Massachusetts.
Preferred conditions: It favors low-elevation disturbed sites, especially wet areas and stream corridors. It is perennial only in warm areas (USDA zones 9–11) and grows as an annual where winters are cold.
Flowering: Flowers Jul–Aug
Flowers Jul–Aug · Fruit Aug–Oct

Life cycle

Seed dispersal: Each pod holds three round black seeds with a white heart-shaped spot.

Name and classification

About the name: It is also called heartseed, a name also used for its close relative Cardiospermum microcarpum.

Conservation

IUCN Red List: LCLeast ConcernLow risk of extinction
Threats: Alabama, Arkansas, South Carolina, and Texas list it as a noxious weed. In the southern US it can form thick mats that smother native plants.