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Asclepias speciosa Torr.
showy milkweed
Symbol: ASSP
Group: Dicot
Family: Asclepiadaceae
Growth Habit: Forb/herb
Duration: Perennial
U.S. Nativity: Native
Click on the image below to enlarge it and download a high-resolution JPEG file.
Click on this Photograph of Asclepias speciosa (showy milkweed) to enlarge it and download a high-resolution JPEG file Robert Tatina. USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln, NE. Courtesy of USDA NRCS Wetland Science Institute. Usage Guidelines.

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Plant Synonyms:
ASSP Asclepias speciosa Torr.
 

ASGI6

Asclepias giffordii Eastw.
More Information
About showy milkweed

Link to plant characteristics report for Asclepias speciosa

Link to plant Classification report for Asclepias speciosa

Plant guide - PDF or DOC format Plant guide for Asclepias speciosa in Word formatPlant guide for Asclepias speciosa in PDF format

Plant source and reference for Asclepias speciosa

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State Distributional Map for ASSP
© Image generated using gd 1.8
Plant Distribution by State

Asclepias speciosa Torr.

ASSP

See county distributions for the following states by clicking on them below or on the map.

CA IL IA
KS MI ND
SD UT* WI*
* Offsite source.
Arizona
California
Colorado
Idaho
Illinois
Iowa
Kansas
Michigan
Minnesota
Montana
Nebraska
Nevada
New Mexico
North Dakota
Oklahoma
Oregon
South Dakota
Texas
Utah
Washington
Wisconsin
Wyoming

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Kansas distribution information South Dakota distribution information Michigan distribution information Illinois distribution information Utah distribution information linked offsite at Utah State University Wisconsin distribution information linked offsite at University of Wisconsin Madison North Dakota distribution information California distribution information Iowa distribution information
Related Taxa:
Asclepias speciosa Torr.

View 22 genera in Asclepiadaceae, 75 species in Asclepias

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Classification:
Asclepias speciosa Torr.

Click on a scientific name below to expand it in the PLANTS Classification Report.
   
    Kingdom Plantae – Plants
       Subkingdom Tracheobionta – Vascular plants
          Superdivision Spermatophyta – Seed plants
             Division Magnoliophyta – Flowering plants
                Class Magnoliopsida – Dicotyledons
                   Subclass Asteridae –
                      Order Gentianales –
                         Family Asclepiadaceae – Milkweed family
                            Genus Asclepias L. – milkweed
                               Species Asclepias speciosa Torr. – showy milkweed

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Threatened and Endangered Plant Information:
Asclepias speciosa Torr.
This plant is listed by the U. S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete protected plant list for that location.
Iowa:
       showy milkweed     Threatened

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Invasive Information:
Asclepias speciosa Torr.
        showy milkweed
This plant is considered invasive by the authoritative sources noted below. This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each invasive plant list, or click here for a composite list of Invasive Plants of the U.S.
WSWS   Whitson, T.D. (Ed.) et al.. 1996. Weeds of the West. Western Society of Weed Science in cooperation with Cooperative Extension Services, University of Wyoming. Laramie, Wyoming.. 630pp.
 

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Wetland Indicator Status:
Asclepias speciosa Torr.
Nat. Ind. Reg. 1 Reg. 2 Reg. 3 Reg. 4 Reg. 5 Reg. 6 Reg. 7 Reg. 8 Reg. 9 Reg. 0 Reg. A Reg. C Reg. H
FAC,FACW NO NI FAC FAC FAC FAC FACW- FACW FAC+ FAC NO NO NO

Wetland Data InformationInterpreting wetland indicator status

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Other Species Accounts and Images:
Asclepias speciosa Torr.
View photographs from CalPhotos.
View species account from ARS Germplasm Resources Information Network (GRIN).
View taxonomic account from Integrated Taxonomic Information System (ITIS) for ITIS Taxonomic Serial Number 30304.
View species account from The Kemper Center for Home Gardening.
View species account or photographs from Wisconsin State Herbarium (UW-Madison).

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Related Web Sites:
Asclepias speciosa Torr.

    MT-Montana State University Weed Science

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