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Asclepias speciosa Torr.
Synonym(s): Asclepias giffordii
USDA Symbol: assp
USDA Native Status: L48 (N), CAN (N)
A stout, sparingly branched, pubescent perennial, 1 1/2-3 ft. tall, with large, oval, blue-green leaves and showy, spherical clusters of rose-colored flowers. Flowers occur at the top of the stem and on stalks from leaf axils. A grayish, velvety plant with erect leafy stems and with umbels of star-like pinkish flowers in upper axils and at top. Sap milky.
Plant CharacteristicsDuration: Perennial Habit: Herb Root Type: Tap Leaf Complexity: Simple Leaf Shape: Ovate Leaf Venation: Pinnate Leaf:
Green Flower: Sepals
Black 5 in. Size Class:
Bloom InformationBloom Color: Pink , Green , Purple
Bloom Time: May , Jun , Jul , Aug , Sep
, WY Canada: AB
, SK Native Distribution:
S. Man. & w. MN
to B.C., s. to TX
& CA Native Habitat:
Savannah, Prairie, Meadow, Field
Growing ConditionsWater Use: Medium
Light Requirement: Sun
Soil Moisture: Moist
CaCO3 Tolerance: Medium
Soil Description: Various soils.
Conditions Comments: Not Available
BenefitUse Wildlife: Hummingbirds.
Warning: This is one of the least toxic of the milkweeds. There are even recipes for preparing this species as a vegetable, but the plants should be positively identified as some of the milkweeds are highly poisonous, and eating them can result in death.
Conspicuous Flowers: yes
Fragrant Flowers: yes
Attracts: Butterflies , Hummingbirds
Larval Host: Monarch
PropagationDescription: Root cuttings can be taken in fall or early spring. Seeds may be sown outside in late fall or the following spring. Germination of spring-planted seeds is enhanced by moist stratification.
Seed Collection: Not Available
Seed Treatment: Stratify 3 months at 40 degrees.
Commercially Avail: yes
Butterflies and Moths of North America (BAMONA)
is a larval host and/or nectar source for:
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Suppliers Directory
According to the inventory provided by Associate Suppliers, this plant is available at the following locations:
Oregon Native Plant Nursery
- Woodburn, OR
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Santa Barbara Botanic Garden
- Santa Barbara, CANative Seed Network
- Corvallis, OR
Record Last Modified: 2009-02-19
Research By: TWC Staff