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sidecluster milkweed

Scientific Name: Asclepias lanuginosa

Family: Asclepiadaceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names: IA (woolly milkweed), IL (woolly milkweed), WI (wo

       

Asclepias oenotheroides and Asclepias lanuginosa: Sidecluster Milkweed and Woolly Milkweed

This page provides information about two milkweed species: Asclepias oenotheroides (Sidecluster Milkweed, Zizotes Milkweed) and Asclepias lanuginosa (Sidecluster Milkweed, Woolly Milkweed).

Considerations for Pets and Children

  • The text mentions that all plants in the genus Asclepias may warrant caution.

Common Names

  • Asclepias oenotheroides: Zizotes Milkweed, Hierba de Zizotes, Longhorn Milkweed, Primrose Milkweed, Side-cluster Milkweed.
  • Asclepias lanuginosa: Sidecluster Milkweed, Woolly Milkweed, Hairy Milkweed.

Taxonomy and Nomenclature

  • Family: Apocynaceae (formerly Asclepiadaceae)
  • Subfamily: Asclepiadoideae
  • Synonym for Asclepias lanuginosa: Acerates lanuginosa (Nutt.) Decne.
  • Taxonomic Rank: Species (and subspecies for some varieties)

Distribution and Habitat

  • Asclepias oenotheroides is native to Arizona (AZ), Colorado (CO), Louisiana (LA), New Mexico (NM), Oklahoma (OK), and Texas (TX). Although found in Dallas, it is more common westward.
  • Asclepias lanuginosa is found in Minnesota, among other locations.

Ecological Role

  • Milkweed plants are on the decline in the US and elsewhere due to human activities.
  • They are indispensable host plants for Monarch butterflies.
  • Asclepias lanuginosa is a state-listed endangered species in Illinois.

Morphological Characteristics

  • Asclepias lanuginosa is described as a perennial forb/herb (a non-woody plant that is not a grass).
  • Asclepias lanuginosa blooms from June to July.
  • Asclepias lanuginosa has a round cluster of pale green to creamy white flowers

Interactions with Other Organisms

  • Milkweeds are host plants for Monarch and Queen butterflies.

Further Information

  • iNaturalist: View Sidecluster milkweed observations on iNaturalist.
  • Wildflower.org: View Sidecluster milkweed plant information at Wildflower.org.
  • Discover Life: Discover Life's page about the biology, natural history, ecology, identification, and distribution of Asclepias lanuginosa.
  • Encyclopedia of Life: Includes articles about Asclepias lanuginosa.
  • Plant Database: Plant database entry for Sidecluster milkweed (Asclepias lanuginosa).