Asclepias verticillata

Asclepias verticillata, also known as whorled milkweed, is a species of milkweed native to North America. It is a perennial herb that is known for its distinctive whorled leaves and small, white flowers.

Description

Asclepias verticillata grows to a height of 0.5 to 1 meter. The leaves are narrow and linear, arranged in whorls of 3 to 6 around the stem. The flowers are small, white, and borne in clusters at the top of the stem. The fruit is a slender, erect pod containing numerous small, brown seeds.

Distribution and habitat

Asclepias verticillata is found throughout much of the eastern and central United States, as well as parts of Canada. It grows in a variety of habitats, including prairies, open woods, and roadsides.

Ecology

Like other species of milkweed, Asclepias verticillata is a host plant for the monarch butterfly. The caterpillars feed on the leaves, and the adult butterflies sip nectar from the flowers. The plant is also visited by a variety of other insects, including bees and wasps.

Cultivation

Asclepias verticillata is cultivated as an ornamental plant for its attractive foliage and flowers. It is also used in butterfly gardens to attract and support monarch butterflies.

Conservation

While Asclepias verticillata is not currently considered threatened or endangered, its habitat is being lost to development and agriculture. Conservation efforts are focused on preserving existing populations and restoring habitat.

References

• Flora of North America
• The Xerces Society Guide to Attracting Native Pollinators

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Asclepias verticillata

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