Gomphocarpus physocarpus, Asclepias physocarpa

USDA Plant Hardiness Zone Map

Close

The name Balloonplant is an allusion to the swelling bladder-like pods which are full of seeds. During the summer, umbels of creamy or greenish-white flowers are produced; these are followed by interesting globular seed pods which are inflated and covered with soft bristles. The flowers are small, with white hoods and about 1/2 inch across. The capsule is a pale green, and in shape an inflated sphere. It is covered with rough hairs. It reaches three inches in diameter. This plant grows to 6 feet tall with a spread of about 2 feet. It has lance-shaped, medium green, hairy leaves. Flowers are a nectar source for many butterflies and leaves are a food source for monarch butterfly larvae (caterpillars). It is also popular in traditional medicine to cure various ailments.

Similar plants:

• Asclepias curassavica (Milkweed, Butterfly Weed, Tropical Milkweed)
• Asclepias incarnata (Swamp Milkweed, Rose Milkweed, Swamp Silkweed)
• Asclepias oenotheroides (Zizotes Milkweed, Longhorn Milkweed, Side-cluster Milkweed, Primrose Milkweed, Lindheimer's Milkweed)
• Asclepias perennis (Aquatic Milkweed, White Swamp Milkweed)
• Asclepias sp. (Milkweed)
• Asclepias tuberosa (Milkweed, Flame Weed, Butterfly Weed, Gay Butterflies, Pleurisy Root)