# Purple Milkweed (*asclepias purpurascens*) Purple Milkweed (Asclepias purpurascens) is an elegant, herbaceous perennial native to the eastern and central United States and parts of Canada. Renowned for its stunning, deep rose-purple flower clusters, this plant is a highly sought-after species for native plant gardeners and wildlife enthusiasts alike. Unlike its highly aggressive relative, the Common Milkweed, Purple Milkweed grows in well-behaved clumps and is far more selective about its habitat. It plays an essential role in supporting local ecosystems, particularly as a vital nectar source for native bumblebees, butterflies, and hummingbirds. Its milky, latex-filled sap contains defensive cardenolides, which render the plant toxic to most herbivores while providing chemical protection to specialized insects that feed on it. - **Category:** [Plants](https://www.snappit.app/explore/categories/plant) - **Rarity:** Common - **Danger:** 1/5 · Very low - **Snaps:** 10 - **Habitat:** Typically found in semi-shaded habitats such as open oak woodlands, thickets, forest margins, and sandy savannas. ![Purple Milkweed](https://inaturalist-open-data.s3.amazonaws.com/photos/135415337/medium.jpeg) Photo: shzimmer, CC BY 4.0 · [iNaturalist](https://www.inaturalist.org/photos/135415337) ## Appearance This robust plant stands between 60 to 100 cm tall, featuring thick, opposite, ovate-oblong leaves with short petioles and fine hairs on their undersides. The most distinctive feature is the dense, dome-shaped clusters (umbels) of intense magenta to deep purple flowers blooming from late spring to mid-summer. Unlike the bumpy seed pods of Common Milkweed, the pods (follicles) of the Purple Milkweed are smooth and downy, eventually splitting to release dark brown seeds equipped with silky white fibers that catch the wind. ## Taxonomy - **Kingdom:** Plantae - **Phylum:** Tracheophyta - **Class:** Magnoliopsida - **Order:** Gentianales - **Family:** Apocynaceae - **Genus:** Asclepias ## Interesting facts - Its specific scientific name, 'purpurascens', is Latin for 'becoming purple', referencing its transition to magnificent violet blooms. - The silky seed floss was collected by schoolchildren during World War II to stuff military lifejackets because of its superior buoyancy and insulating properties. - Unlike the common milkweed, which aggressively spreads through deep underground runners, Purple Milkweed grows in polite, non-invasive clumps. ## Special abilities - **Toxic Chemical Defense:** Produces a white, sticky latex sap containing cardenolides (cardiac glycosides) that are toxic to most herbivores. - **Pollinia Clamping Mechanism:** Flowers use specialized, sticky pollen sacs called pollinia that temporarily clamp onto visiting insects' legs to ensure highly efficient cross-pollination. - **Wind-Assisted Seed Dispersal:** Each seed is equipped with a tuft of lightweight, silky hairs (coma) designed to catch drafts and float long distances away from the parent plant. ## Measurements & details - **Length:** 60-100 cm - **Lifespan:** 5-20 years ## Diet & Feeding As a photosynthetic plant, it synthesizes its own sugars using sunlight, water, carbon dioxide, and essential soil macronutrients. - **Primary Foods:** Sunlight, Water, Carbon Dioxide, Nitrogen, Phosphorus, Potassium ## Ecological connections - **Host plant:** [Monarch Butterfly](https://www.snappit.app/explore/monarch-butterfly) (*Danaus plexippus*) — Provides critical larval food and chemical protection for caterpillars. - **Mutualism:** Eastern Bumblebee (*Bombus impatiens*) — Relies heavily on long-tongued bees for pollination in exchange for rich nectar. - **Eaten by:** [Milkweed Tussock Moth](https://www.snappit.app/explore/milkweed-tussock-moth) (*Euchaetes egle*) — Voracious caterpillars defoliate leaves while tolerating the plant's chemical defenses. ## Safety **Danger:** 1/5 · Very low No special safety notes yet. ## Frequently Asked Questions ### How to identify Purple Milkweed? Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details. ### How long is Purple Milkweed? 60-100 cm ### How long does Purple Milkweed live? 5-20 years ### What does Purple Milkweed eat? As a photosynthetic plant, it synthesizes its own sugars using sunlight, water, carbon dioxide, and essential soil macronutrients. ### Where is Purple Milkweed usually found? Typically found in semi-shaded habitats such as open oak woodlands, thickets, forest margins, and sandy savannas. ## Where to spot - [Arden Park–East Boston Historic District](https://www.snappit.app/guides/places/arden-park-east-boston-historic-district) — Michigan, US · Historic District - [Broadway Avenue Historic District](https://www.snappit.app/guides/places/broadway-avenue-historic-district) — Michigan, US · Historic District - [Grand Circus Park Historic District](https://www.snappit.app/guides/places/grand-circus-park-historic-district) — Michigan, US · Historic District - [Greektown](https://www.snappit.app/guides/places/greektown) — Michigan, US · Neighborhood - [Lafayette Park](https://www.snappit.app/guides/places/lafayette-park) — Michigan, US · Neighborhood - [Long Ridge Village Historic District](https://www.snappit.app/guides/places/long-ridge-village-historic-district) — Connecticut, US · Historic District [View all places to see Purple Milkweed](https://www.snappit.app/guides/where-to-see/purple-milkweed) ## More Plants - [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*) - [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*) - [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*) - [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*) --- Source: [Purple Milkweed: Facts & Places to See — Snappit](https://www.snappit.app/explore/purple-milkweed)