Apocynaceae

Pallid milkweed

Asclepias cryptoceras S.Watson

Family: Apocynaceae
Genus: Asclepias

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Pallid milkweed (Asclepias cryptoceras) — FlowerPhoto: Cecelia Alexander, CC0, from iNaturalist

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Common names

By language (1)

English: Pallid milkweed, Humboldt milkweed, Cow-cabbage

Synonyms

Acerates latifolia Torr. & Frém.
Asclepias cryptoceras var. cryptoceras

Flowers

In flower: May to June (from 224 flowering iNaturalist observations worldwide)

Characteristics

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

Photos

FlowerPhoto: Cecelia Alexander, CC0, from iNaturalist
FlowerPhoto: Martin Purdy, CC BY 4.0, from iNaturalist
FlowerPhoto: Brad Grimm, CC BY 4.0, from iNaturalist
FlowerPhoto: Steve Matson, CC BY 4.0, from iNaturalist
FlowerPhoto: Brad Grimm, CC BY 4.0, from iNaturalist
FruitPhoto: kweitemier, CC BY-SA 4.0, from iNaturalist
Photo: Mary Winter, CC0, from Wikimedia Commons
Photo: Thayne Tuason, CC BY-SA 4.0, from Wikimedia Commons
Photo: Thayne Tuason, CC BY-SA 4.0, from Wikimedia Commons
Photo: Thayne Tuason, CC BY-SA 4.0, from Wikimedia Commons
Photo: Jim Morefield from Nevada, USA, CC BY-SA 2.0, from Wikimedia Commons
Photo: Matt Berger, 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.