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Asclepias engelmanniana (Engelmann's milkweed)
Williams, Pam

Asclepias engelmanniana

Asclepias engelmanniana Woodson

Engelmann's milkweed

Asclepiadaceae (Milkweed Family)

Synonym(s): Acerates auriculata, Asclepias auriculata


USDA Native Status: L48 (N)

The species of this plant is named for George Engelmann (1809-1884) who was born in Germany and settled in St. Louis, Missouri, as a young man. He was a physician and botanist, describing especially North American Abies (Firs), Agaves, Cactus (for which he described more than 108 species), Cuscuta (Dodder), Euphorbiaceae (Spurge Family), Juncus (Rushes), Juniperus (“Cedar”), Pinus (Pines), Vitis (Grapes), and Yuccas. When he died much of his collection went to Missouri Botanical Garden.


From the Image Gallery

3 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Linear
Leaf Pubescence: Glabrous
Leaf Apex: Acute
Leaf Base: Attenuate
Breeding System: Flowers Bisexual
Inflorescence: Umbel
Fruit Type: Follicle
Size Notes: One to four feet in height.
Leaf: Leaves often approximate and may appear verticillate.
Size Class: 1-3 ft. , 3-6 ft.

Bloom Information

Bloom Color: Green
Bloom Time: Jul , Aug , Sep
Bloom Notes: Pale green tinged with purple


USA: AZ , CO , IA , KS , NE , NM , OK , TX
Native Distribution: Endangered in IA.

Value to Beneficial Insects

Special Value to Native Bees
Special Value to Bumble Bees
Special Value to Honey Bees
Supports Conservation Biological Control

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.

Additional resources

USDA: Find Asclepias engelmanniana in USDA Plants
FNA: Find Asclepias engelmanniana in the Flora of North America (if available)
Google: Search Google for Asclepias engelmanniana


Record Modified: 2014-10-10
Research By: TWC Staff

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