Broadleaf Milkweed

asclepias latifolia

The Broadleaf Milkweed (Asclepias latifolia) is a robust and drought-resistant perennial plant native to the dry plains and desert grasslands of the central and southwestern United States. Unlike many of its delicate cousins, this milkweed features thick, tough, and exceptionally wide leaves that allow it to conserve precious moisture in arid environments. This hardy wildflower produces dense, globular clusters of yellowish-green flowers that provide an essential source of nectar for local pollinators during the hot summer months. Like other milkweeds, it produces a sticky, milky latex sap filled with toxic cardenolides, which serves as a powerful defense mechanism against herbivores while simultaneously supporting specialized insect species. Discover and identify species like Broadleaf Milkweed with the Snappit app.

Habitat: Thrives in dry, open environments such as sandy prairies, desert grasslands, plains, and disturbed roadsides.

Appearance

This plant is easily identified by its stout, erect stems growing 30 to 80 centimeters tall, clad in large, opposite leaves. The leaves are remarkably broad, almost circular or oval, light green to blue-green, and feel thick and leathery with prominent, pale veins. During summer, spherical clusters of small, pale green to cream-colored flowers emerge directly from the upper leaf junctions. These are followed by large, smooth, and upright seed pods containing flat seeds adorned with fluffy, white silky hairs.

KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderGentianalesFamilyApocynaceaeGenusAsclepias

Broadleaf Milkweed

Interesting facts

Monarch caterpillars ingest the toxic sap of this plant, making themselves highly poisonous to birds and other predators.

Native Americans historically used the incredibly strong and durable fibers from the dry winter stems to craft high-quality string, ropes, and fishing nets.

The milky latex sap contains a natural rubber compound, which was briefly researched during WWII as a potential alternative rubber source.

Special abilities

Produces toxic cardiac glycosides within its milky sap, rendering the plant unpalatable and lethal to most mammalian and insect herbivores.

Utilizes a deep, woody taproot system to access deep groundwater reserves, enabling survival in arid and semi-desert conditions.

Seeds are attached to silky, lightweight fibers that act as miniature parachutes, allowing the wind to carry them miles away to establish new colonies.