Sandhill Milkweed
ExplorePlants
Sandhill Milkweed
asclepias humistrata
Sandhill Milkweed (Asclepias humistrata) is a remarkable perennial wildflower native to the sandy pinelands and scrublands of the southeastern United States. Unlike many upright milkweed species, it exhibits a unique sprawling, prostrate growth habit, running along the ground like a vine. This hardy plant plays a crucial ecological role as a larval host for monarch butterflies, providing essential nourishment to caterpillars in dry, fire-dependent sandhill ecosystems where other vegetation struggles to survive.
Habitat: Found in dry, sandy soils, particularly in longleaf pine sandhills, scrub, and open sand dunes.
Appearance
This plant is easily identified by its sprawling stems that trail along the ground, usually growing 30 to 90 centimeters in length. The most striking feature is its large, thick, ovate leaves, which clasp the stem directly and feature brilliant, contrast-rich veins colored in shades of lavender, pink, or deep purple. In late spring, it produces rounded, umbrella-like clusters of intricate flowers that range in color from pale pinkish-purple to off-white, attracting a variety of native pollinators.
KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderGentianalesFamilyApocynaceaeGenusAsclepias
Category
PlantsRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
Caterpillars feeding on this plant actually store the milkweed's toxins in their own bodies, making them poisonous to birds and other predators.
Its heavily colored, contrasting purple veins are thought to serve as aposematic (warning) signals to warn herbivores of its high toxicity.
The scientific name 'humistrata' translates to 'spread on the ground', directly referencing its unique flat, prostrate growth habit.
Special abilities
Ability
Cardenolide Chemical Defense
Produces a toxic milky latex rich in cardenolides (cardiac glycosides) that deters most herbivores from eating its foliage.
Ability
Drought-Resistant Taproot
Possesses a very deep, fleshy taproot that stores water and nutrients, allowing it to thrive in extremely dry, fast-draining sandy soils.
Ability
Fire Regeneration
Adapted to fire-prone ecosystems, easily resprouting from its deep taproot shortly after wildfires sweep through its habitat.
Measurements & details
- Length
- 30-90 cm
- Lifespan
- 5-20 years
Diet & Feeding
As a photoautotroph, Sandhill Milkweed generates its own energy using sunlight, water, carbon dioxide, and minerals absorbed through its root system.
Primary Foods
- Sunlight
- Carbon dioxide
- Water
- Soil nutrients
Ecological connections
eaten by
Monarch Butterfly
Danaus plexippus
Provides critical food and habitat for developing larvae, which sequester the plant's toxins for their own defense.
eaten by
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Large Milkweed Bug
Oncopeltus fasciatus
Feeds on the seeds, leaves, and stems, accumulating the plant's toxic cardiac glycosides.
mutualism
Southern Carpenter Bee
Xylocopa micans
Visits the flowers for nectar, acting as an effective pollinator in dry pine ecosystems.
Traits
No trait badges are assigned for this object yet.
Also known as
No aliases listed yet.
Collections
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Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Sandhill Milkweed?
The easiest way to identify Sandhill Milkweed is to use the Snappit nature identifier app.
How long is Sandhill Milkweed?
30-90 cm
How long does Sandhill Milkweed live?
5-20 years
What does Sandhill Milkweed eat?
As a photoautotroph, Sandhill Milkweed generates its own energy using sunlight, water, carbon dioxide, and minerals absorbed through its root system.
Where is Sandhill Milkweed usually found?
Found in dry, sandy soils, particularly in longleaf pine sandhills, scrub, and open sand dunes.
Snap Map
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Recent Snaps
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Where to spot
Park20 sightings12 species
Florida, US
Jennings State Forest
You might spot Lady Lupine, Woolly Pawpaw, and Tarflower.
View guide →
Park30 sightings12 species
Alabama, US
Mobile Botanical Gardens
You might spot Scarlet Calamint and Golden Silk Spider.
View guide →
Park30 sightings12 species
Florida, US
Rock Springs Run State Reserve
You might spot White-Tailed Deer, American Alligator, and Garberia.
View guide →
Park30 sightings12 species
Georgia, US
St. Catherines Island
You might spot Monarch, Sandhill Milkweed, and Fiery Skipper.
View guide →
