Asclepias purpurascens L.
PURPLE MILKWEED
Life   Plantae   Dicotyledoneae   Asclepiadaceae   Asclepias

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Asclepias purpurascens, Purple Milkweed
© Copyright Sheryl Pollock 2011 · 8
Asclepias purpurascens, Purple Milkweed

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Asclepias purpurascens, Purple Milkweed
© Copyright Sheryl Pollock 2011 · 8
Asclepias purpurascens, Purple Milkweed
Asclepias purpurascens, plant and flower
© Kay Yatskievych, 2003 · 1
Asclepias purpurascens, plant and flower

Asclepias purpurascens, flower and buds
© Kay Yatskievych, 2003 · 1
Asclepias purpurascens, flower and buds

Associates · map
FamilyScientific name @ source (records)
Acanaloniidae  Acanalonia bivittata @ UDCC_TCN (1)

Acanalonia conica @ UDCC_TCN (1)
Apidae  Bombus griseocollis @ UCRC_ENT (1)
Mycosphaerellaceae  Cercospora clavata @ BPI (1)
Pucciniaceae  Uromyces asclepiadis @ BPI (2)

Uromyces howei @ BPI (3)

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Following modified from MissouriPlants.com
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Asclepias purpurascens L.

Purple Milkweed

Asclepias purpurascens plant2

Family - Asclepiadaceae

Habit - Perennial forb from a taproot and deep rhizomes.

Stems - Erect, to 1 m, unbranched or singly branched near the tip, densely hairy toward the tips, also with a vertical line of tomentoulose hairs decurrent from the base of each petiole, with 4-10 nodes.

Asclepias purpurascens stem3 Stem and node.

Asclepias purpurascens stem Milky latex.

Leaves - Opposite, decussate, simple, entire, short petiolate. Petioles to 1 cm long, antrorsely pubescent. Blades to 20 cm long, 10 cm broad, entire, lanceolate-elliptic or ovate, the base rounded, the tips abruptly acute, pubescent and deep green adaxially, light green and densely pubescent abaxially. Lateral venation anastomosing.

Asclepias purpurascens leaf1 Leaf adaxial.

Asclepias purpurascens leaf2 Leaf abaxial.

Inflorescence - Umbels, terminal and sometimes axillary from upper leaf nodes, 1-5 per stem, long-stalked, with 12-50 flowers. Peduncles to 7 cm long, erect, sparsely pubescent but wooly on one side. Pedicels to 2 cm long, wooly, subtended by linear bracts. Bracts withering quickly, to 6 mm long, pubescent.

Asclepias purpurascens umbel Umbel.

Asclepias purpurascens inflorescence Inflorescences.

Asclepias purpurascens inflorescence2 Inflorescence stages.

Flowers - Calyx lobes 5, reflexed, sparsely to moderately short-hairy, surface, 2.5-4.0 mm long, lanceolate to ovate-lanceolate. Corolla lobes 5, reflexed, glabrous or minutely hairy on the inner surface toward the base, reddish purple to dark purple, 7-10 mm long, ovate to elliptic-lanceolate. Gynostegium appearing very short-stalked (the column barely visible below the bases of the hoods), pale purple (rarely tan and purple-tinged) to reddish purple, the corona conspicuously longer than the tip of the anther/stigma head. Corona hoods purplish pink, glabrous, 4-8 mm long, loosely ascending to ascending, attached near their bases, the apical portion oblong to ovate in outline, the tip narrowly rounded, the margins not noticeably lobed, the bases not pouched. Horns attached toward the hood bases, relatively short, bent or curved abruptly inward over the anther/stigma head and not extended past the tips of the hoods, sickle-shaped, relatively stout, slightly flattened, sharply pointed at the tip. Anther column white at the apex, 3-4 mm in diameter. Pollinia to 2 mm long, the connective deep purple. Pistils 2, glabrous, light green, 3 mm long in flower.

Asclepias purpurascens flower1 Flowers.

Asclepias purpurascens flower

Fruits - Follicles 10-16 cm long, erect or ascending from deflexed stalks, narrowly elliptic to ovate and slightly arched in outline, the surface smooth, minutely hairy. Seeds with the body 5-7 mm long, the margins narrowly winged, the terminal tuft of hairs white.

Asclepias purpurascens fruits Fruits.

Flowering - May - July.

Habitat - Rocky open woods, glades, prairies, stream banks, wet meadows and valleys, thickets, roadsides.

Origin - Native to U.S.

Other info. - This richly colored and showy species can be found throughout Missouri. It is most common in Midwestern states, though its range extends into New England and Canada. The flower color alone is generally sufficient for identification. The plant is quite striking and would grow with little care in a garden. This species also attracts many flying insects and would be a great addition to a butterfly garden. It seems to be a favored nectar source for the Great Spangled Fritillary butterfly ( Speyeria cybele , see photo below). The plant has been known to hybridize with the common milkweed, A. syriaca .

As is the case with most milkweeds, the stems of A. purpurascens produce copious amounts of milky sap when injured. This sap is toxic and can be irritating.

Asclepias purpurascens fritillary
With Great Spangled Fritillary butterflies.

Photographs taken off Hwy 21, Reynolds County, MO., 6-1-03, and off Hwy 106, Shannon County, MO., 6-12-04 (DETenaglia); also at Shaw Nature Reserve, Franklin County, MO, 5-29-2007 and 6-5-2015; Cuivre River State Park, Lincoln County, MO, 6-13-2009; Matson Hill County Park, St. Charles County, MO, 5-17-2012; and Weldon Spring Conservation Area, St. Charles County, MO, 6-8-2014 (SRTurner).


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http://plants.usda.gov/java/profile?symbol=ASPU2 ---> https://plants.usda.gov/java/profile?symbol=ASPU2
https://plants.usda.gov/java/profile?symbol=ASPU2 ---> http://plants.usda.gov/core/profile?symbol=ASPU2
http://plants.usda.gov/core/profile?symbol=ASPU2 ---> https://plants.usda.gov/core/profile?symbol=ASPU2
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Asclepias purpurascens L.
purple milkweed

Image of Asclepias purpurascens

General Information
Symbol: ASPU2
Group: Dicot
Family: Asclepiadaceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : CAN   N
L48   N
Data Source and Documentation
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Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

Images

click on a thumbnail to view an image, or see all the Asclepias thumbnails at the Plants Gallery

William C. Taylor. USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species . Midwest National Technical Center, Lincoln. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements .

Robert H. Mohlenbrock. USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species . Midwest National Technical Center, Lincoln. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements .

©Thomas G. Barnes. Barnes, T.G., and S.W. Francis. 2004. Wildflowers and ferns of Kentucky . University Press of Kentucky. Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 26. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .

USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. Provided by NRCS National Wetland Team . Usage Requirements .

slideshow

Synonyms

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
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 purpurascens L. – purple milkweed

Subordinate Taxa

This plant has no children

Legal Status

Threatened and Endangered Information:
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.
Connecticut purple milkweed Special Concern
Massachusetts purple milkweed Endangered
Rhode Island purple milkweed Historical
Tennessee purple milkweed Special Concern
Wisconsin purple milkweed Endangered

Wetland Status

Interpreting Wetland Status

North America
Atlantic and Gulf Coastal Plain FACU
Eastern Mountains and Piedmont FACU
Great Plains FACU
Midwest FACU
Northcentral & Northeast FACU

Related Links

More Accounts and Images
CalPhotos (ASPU2)
Integrated Taxonomic Information System (ASPU2)
Lady Bird Johnson Wildflower Center Native Plant Information Network (ASPU2)
University of Tennessee Herbarium (Distribution) (ASPU2)
University of Wisconsin - Stevens Point Freckmann Herbarium (ASPU2)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover


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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Asclepias+purpurascens&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Asclepias+purpurascens&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 12
Query: SELECT * FROM img WHERE ready=1 and taxon like "Asclepias purpurascens%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 0000 0203 0616 [detail]
© 2003 Jeff Abbas

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 0000 0203 0617 [detail]
© 2003 Jeff Abbas

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0336 [detail]
© 2016 Keir Morse

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0337 [detail]
© 2016 Keir Morse

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0338 [detail]
© 2016 Keir Morse

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0339 [detail]
© 2016 Keir Morse

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0340 [detail]
© 2016 Keir Morse

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0341 [detail]
© 2016 Keir Morse

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0342 [detail]
© 2016 Keir Morse

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0343 [detail]
© 2016 Keir Morse

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0344 [detail]
© 2016 Keir Morse

Asclepias purpurascens
Asclepias purpurascens
Purple Milkweed
ID: 0000 1111 1234 0345 [detail]
© 2016 Keir Morse

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