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Asclepias syriaca Linnaeus. Common Milkweed. Phen: Jun-Aug; Jul-Sep. Hab: Prairies, floodplains, pastures, roadsides, disturbed areas. Dist: NB and ME west to s. MB and ND, south to SC, GA, c. TN (Chester, Wofford, & Kral 1997), AR, OK, and KS, the southern range expansion recent. This species is apparently expanding its range southward; see Wyatt et al. (1993) and Wyatt (1996) for discussion.

Origin/Endemic status: Native

Synonymy : = Ar, C, FNA14, GrPl, K1, K3, K4, Mi, Mo2, NE, NY, Ok, Pa, RAB, S, Tat, Tn, Va, W, Woodson (1954); > Asclepias syriaca L. var. kansana (Vail) Palmer & Steyerm. – F, G, Il; > Asclepias syriaca L. var. syriaca – F, G, Il

Links to other floras: = Asclepias syriaca - FNA14

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: UPL
  • Eastern Mountains and Piedmont: FACU
  • Great Plains: UPL
  • Midwest: FACU
  • Northcentral & Northeast: UPL

Heliophily : 8

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image of plant© Keith Bradley | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Scott Allen Davis, some rights reserved (CC BY), uploaded by Scott Allen Davis source CC-BY | Original Image ⭷
image of plant© Collectors SOS | Original Image ⭷
image of plant© Grant Morrow Parkins | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© evangrimes, some rights reserved (CC BY), uploaded by evangrimes source CC-BY | Original Image ⭷
image of plant© Bennett Grappone, some rights reserved (CC BY), uploaded by Bennett Grappone source CC-BY | Original Image ⭷
image of plant© Liren Varghese, some rights reserved (CC BY), uploaded by Liren Varghese source CC-BY | Original Image ⭷
image of plant© Sandy Wolkenberg, some rights reserved (CC BY), uploaded by Sandy Wolkenberg source CC-BY | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Michael Newlon, some rights reserved (CC BY), uploaded by Michael Newlon source CC-BY | Original Image ⭷
image of plant© Keith Bradley | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Collectors SOS | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: A conspicuous, coarse perennial that forms large colonies in unmowed fields, pastures, roadsides and other disturbed areas.

Stems: Stem stout, unbranched, often furry; leaks milky sap when bruised.

Leaves: Leaves opposite, short-petiolate, oval to oblong, 6-9 in. long, with a reddish central vein, soft-hairy beneath.

Inforescence:

Flowers: Flowers on long stalks that often droop, in a globe-shaped terminal umbel and a few upper axillary umbels; fragrant, pale-purple to rose-colored, with 5 strongly reflexed corolla lobes and a central crown--composed of 5 2-parted appendages ("hood" and "horn")--surrounding a complex structure of fused anthers and style.

Fruits: Fruit a warty, somewhat furry, oval follicle containing tufted seeds.

Comments: This species, a well-known Monarch host plant, is apparently expanding its range southward.

Height: 3-6 ft.

plant sale text: Common milkweed is the most substantial of our native milkweeds. It is a great host plant for monarch larvae and a nectar source for adult butterflies. It is also showy, both in flower and in fruit. Large round clusters of dusty pink flowers are followed by large warty pods trailing delicate milkweed fluff. It is drought tolerant, and works well in a loose or wild landscape like a meadow or woodland edge. Individual plants are large and are likely to form colonies. Milkweeds support up to 12 species of lepidoptera.

bloom table text:

description: A conspicuous, coarse perennial that forms large colonies in unmowed fields, pastures, roadsides and other disturbed areas.

stems: Stem stout, unbranched, often furry; leaks milky sap when bruised.

leaves: Leaves opposite, short-petiolate, oval to oblong, 6-9 in. long, with a reddish central vein, soft-hairy beneath.

inflorescence:

flowers: Flowers on long stalks that often droop, in a globe-shaped terminal umbel and a few upper axillary umbels; fragrant, pale-purple to rose-colored, with 5 strongly reflexed corolla lobes and a central crown--composed of 5 2-parted appendages ("hood" and "horn")--surrounding a complex structure of fused anthers and style.

fruits: Fruit a warty, somewhat furry, oval follicle containing tufted seeds.

comments: This species, a well-known Monarch host plant, is apparently expanding its range southward.

cultural notes:

germination code: 2

native range: eastern North America

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