Apocynaceae

Sidecluster milkweed

Asclepias lanuginosa Nutt.

Family: Apocynaceae
Genus: Asclepias

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Sidecluster milkweed (Asclepias lanuginosa) — FlowerPhoto: Rose Zappa, CC BY 4.0, from iNaturalist

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Common names

By language (1)

English: Sidecluster milkweed, Side-cluster milkweed, Small-green milkweed, Woolly milkweed

Synonyms

Acerates lanuginosa (Nutt.) Decne.
Acerates monocephala Lapham ex A.Gray
Asclepias nuttalliana Torr.
Polyotus lanuginosus (Nutt.) Nutt.

Flowers

In flower: June (from 60 flowering iNaturalist observations worldwide)

Characteristics

Growth habit: Forb/herb
Lifespan: Perennial
In the US and Canada: Canada: native, Lower 48 states: native

Photos

FlowerPhoto: Rose Zappa, CC BY 4.0, from iNaturalist
FlowerPhoto: Rose Zappa, CC BY 4.0, from iNaturalist
FlowerPhoto: Katharine Hogan, PhD, CC0, from iNaturalist
FlowerPhoto: Norma Malinowski, CC BY 4.0, from iNaturalist
FruitPhoto: Owen McElroy, CC0, from iNaturalist
FruitPhoto: Rose Zappa, CC BY 4.0, from iNaturalist
Photo: Jacob Friend, CC0, from iNaturalist
Photo: Kim, CC BY 4.0, from iNaturalist
Photo: Colin Croft, CC BY 4.0, from iNaturalist
Photo: Lauren McLaurin, CC BY 4.0, from iNaturalist
Photo: Chris Friesen, CC BY 4.0, from iNaturalist
Photo: Lauren McLaurin, CC BY 4.0, from iNaturalist

More in Asclepias

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.