Lady Bird Johnson Wildflower Center - The University of Texas at Austin information

 Native Plant Database

Asclepias speciosa (Showy milkweed)
Cliffe, Harry

Asclepias speciosa Torr.


Showy milkweed

Asclepiadaceae (Milkweed Family)



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.


Image Gallery:

15 photo(s) available

Plant Characteristics

Duration: Perennial
Habit: Herb
Root Type: Tap
Leaf Complexity: Simple
Leaf Shape: Ovate
Leaf Venation: Pinnate
Leaf: Green
Flower: Sepals 5
Fruit: Black 5 in.
Size Class: 3-6 ft.

Bloom Information

Bloom Color: Pink , Green , Purple
Bloom Time: May , Jun , Jul , Aug , Sep

Distribution

USA: AZ , CA , CO , ID , IL , IA , KS , MI , MN , MT , NE , NV , NM , ND , OK , OR , SD , TX , UT , WA , WI , WY
Canada: AB , SK
Native Distribution: S. Man. & w. MN to B.C., s. to TX & CA
Native Habitat: Savannah, Prairie, Meadow, Field
USDA Native Status: L48(N), CAN(N)

Growing Conditions

Water Use: Medium
Light Requirement: Sun
Soil Moisture: Moist
CaCO3 Tolerance: Medium
Soil Description: Various soils.
Conditions Comments: Not Available

Benefit

Use 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: Hummingbirds , Butterflies
Larval Host: Monarch

Butterflies and Moths of North America (BAMONA)

Asclepias speciosa is a larval host and/or nectar source for:
Monarch
(Danaus plexippus)

Larval Host
Learn more at BAMONA

Last Update: 2009-02-19