Asclepias purpurascens - L.
Purple Milkweed
Other Common Names: purple milkweed
Taxonomic Status: Accepted
Related ITIS Name(s): Asclepias purpurascens L. (TSN 30296)
Unique Identifier: ELEMENT_GLOBAL.2.145205
Element Code: PDASC021J0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Dogbane Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Gentianales Apocynaceae Asclepias
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Asclepias purpurascens
Conservation Status
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NatureServe Status

Global Status: G5?
Global Status Last Reviewed: 06Jun2002
Global Status Last Changed: 06Jun2002
Rounded Global Status: G5 - Secure
Reasons: Occurs in eastern North America from Ontario and New Hampshire south to Georgia and west as far as South Dakota and Texas. However, distribution is spotty in parts of the range, especially along the northeastern seaboard (possibly extirpated in Rhode Island and New Hampshire), in the southeast (Virginia to Mississippi), and in the northern midwest. Apparently scattered or occasional throughout much of its broad range, but also apparently fairly widespread and abundant in some states, including Texas and Missouri. Its habitat requirements are not particularly restrictive: the species apparently occurs in prairies, woodland openings/edges, and thickets, and in wet situations as well as on dry, rocky ridgetops. Also, at least in Texas, along roadsides and rights-of-way. Protection and restoration of prairie remnants and oak savannas may benefit the species in areas such as the upper midwest.
Nation: United States
National Status: NNR
Nation: Canada
National Status: N2 (14Oct2017)

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Arkansas (SNR), Connecticut (S2S3), Delaware (S2), District of Columbia (SX), Georgia (S1), Illinois (SNR), Indiana (SNR), Iowa (S3), Kansas (SNR), Kentucky (S4), Louisiana (S1), Maine (SNR), Maryland (SU), Massachusetts (S1), Michigan (S2), Minnesota (SH), Mississippi (S1), Missouri (SNR), Nebraska (S2), New Hampshire (SH), New Jersey (S3S4), New York (S2S3), North Carolina (S1?), Ohio (SNR), Oklahoma (SNR), Pennsylvania (S4), Rhode Island (SH), South Dakota (SNR), Tennessee (S1), Texas (SNR), Vermont (SNR), Virginia (S2), West Virginia (S4), Wisconsin (S3)
Canada Ontario (S1)

Other Statuses

Committee on the Status of Endangered Wildlife in Canada (COSEWIC): Candidate (Medium) (26Jan2015)

NatureServe Global Conservation Status Factors

Other NatureServe Conservation Status Information

Distribution
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U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AR, CT, DCextirpated, DE, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, NE, NH, NJ, NY, OH, OK, PA, RI, SD, TN, TX, VA, VT, WI, WV
Canada ON

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CT Fairfield (09001), Hartford (09003)*, Middlesex (09007), New Haven (09009), New London (09011), Tolland (09013)*
DE New Castle (10003), Sussex (10005)
GA Floyd (13115), Murray (13213)
LA Caldwell (22021), Lincoln (22061)*
MA Barnstable (25001), Berkshire (25003)*, Dukes (25007)*, Essex (25009)*, Franklin (25011)*, Hampshire (25015), Middlesex (25017)*, Nantucket (25019)*, Norfolk (25021)*, Suffolk (25025)*, Worcester (25027)*
MI Barry (26015), Berrien (26021), Cass (26027), Clinton (26037)*, Ingham (26065)*, Jackson (26075), Kalamazoo (26077), Lenawee (26091), Livingston (26093)*, Monroe (26115), Muskegon (26121), Newaygo (26123), Oceana (26127), St. Clair (26147), St. Joseph (26149), Van Buren (26159), Washtenaw (26161), Wayne (26163)
MS Grenada (28043), Washington (28151)
NC Bertie (37015)*, Burke (37023), Davidson (37057), Durham (37063), Hertford (37091), Johnston (37101), Moore (37125), Pender (37141), Person (37145), Union (37179), Wilkes (37193)
NE Nemaha (31127), Richardson (31147)
NH Hillsborough (33011)*, Rockingham (33015)*, Strafford (33017)*
NJ Mercer (34021)
NY Bronx (36005), Greene (36039), Orange (36071), Richmond (36085), Suffolk (36103), Ulster (36111), Westchester (36119)
TN Bradley (47011), Greene (47059)*, Montgomery (47125), Perry (47135), Stewart (47161), Williamson (47187)
VA Campbell (51031)*, Fairfax (51059), Fauquier (51061), Greensville (51081), Hampton (City) (51650), Hanover (51085), James City (51095)*, Loudoun (51107), Newport News (City) (51700), Prince William (51153), Rockbridge (51163), Shenandoah (51171)*
WI Crawford (55023), Dane (55025), Grant (55043), Iowa (55049), Jefferson (55055), Kenosha (55059), Lafayette (55065), Milwaukee (55079)*, Racine (55101), Rock (55105), Sauk (55111), Walworth (55127), Washington (55131)*, Waukesha (55133), Waushara (55137), Winnebago (55139)*
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
01 Piscataqua-Salmon Falls (01060003)+*, Merrimack (01070002)+*, Concord (01070005)+*, Merrimack (01070006)+*, Middle Connecticut (01080201)+, Chicopee (01080204)+, Lower Connecticut (01080205)+, Farmington (01080207)+*, Charles (01090001)+*, Cape Cod (01090002)+, Blackstone (01090003)+*, Shetucket (01100002)+*, Thames (01100003)+, Quinnipiac (01100004)+, Housatonic (01100005)+, Saugatuck (01100006)+
02 Middle Hudson (02020006)+, Rondout (02020007)+, Hudson-Wappinger (02020008)+, Lower Hudson (02030101)+, Bronx (02030102)+, Sandy Hook-Staten Island (02030104)+, Northern Long Island (02030201)+, Southern Long Island (02030202)+, Middle Delaware-Musconetcong (02040105)+, Brandywine-Christina (02040205)+, Broadkill-Smyrna (02040207)+, North Fork Shenandoah (02070006)+*, Middle Potomac-Catoctin (02070008)+, Middle Potomac-Anacostia-Occoquan (02070010)+, Pamunkey (02080106)+, Lynnhaven-Poquoson (02080108)+, Western Lower Delmarva (02080109)+, Maury (02080202)+, Lower James (02080206)+*
03 Middle Roanoke (03010102)+*, Lower Roanoke (03010107)+*, Ghowan (03010203)+, Meheriin (03010204)+, Upper Tar (03020101)+, Upper Neuse (03020201)+, Deep (03030003)+, Northeast Cape Fear (03030007)+, Upper Yadkin (03040101)+, Lower Yadkin (03040103)+, Rocky, North Carolina, (03040105)+, South Fork Catawba (03050102)+, Conasauga (03150101)+, Oostanaula (03150103)+, Upper Coosa (03150105)+
04 Upper Fox (04030201)+*, Wolf (04030202)+, Lake Winnebago (04030203)+*, Pike-Root (04040002)+, Milwaukee (04040003)+*, St. Joseph (04050001)+, Kalamazoo (04050003)+, Upper Grand (04050004)+*, Thornapple (04050007)+, Pere Marquette-White (04060101)+, Muskegon (04060102)+, Lake St. Clair (04090002)+, Huron (04090005)+, Ottawa-Stony (04100001)+, Raisin (04100002)+
05 Harpeth (05130204)+, Lower Cumberland (05130205)+, Red (05130206)+
06 Nolichucky (06010108)+*, Middle Tennessee-Chickamauga (06020001)+, Lower Tennessee-Beech (06040001)+, Kentucky Lake (06040005)+*
07 Coon-Yellow (07060001)+, Grant-Little Maquoketa (07060003)+, Baraboo (07070004)+, Lower Wisconsin (07070005)+, Kickapoo (07070006)+, Upper Rock (07090001)+*, Crawfish (07090002)+, Pecatonica (07090003)+, Sugar (07090004)+*, Des Plaines (07120004)+, Upper Fox (07120006)+
08 Yalobusha (08030205)+, Big Sunflower (08030207)+, Bayou D'arbonne (08040206)+*, Lower Ouachita (08040207)+, Castor (08040302)+, Dugdemona (08040303)+*, Boeuf (08050001)+
10 Tarkio-Wolf (10240005)+
AS AS-17 (AS-17)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History Not yet assessed
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Economic Attributes
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Economically Important Genus: Y
Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 06Jun2002
NatureServe Conservation Status Factors Author: Maybury, K.

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Argus, G.W., K.M. Pryer, D.J. White and C.J. Keddy (eds.). 1982-1987. Atlas of the Rare Vascular Plants of Ontario.. Botany Division, National Museum of National Sciences, Ottawa.

  • Choberka, E.G., M.R. Penskar, and P.J. Higman. 2000. Special plant abstraxt for Asclepias purpurascens (purple milkweed). Michigan Natural Features Inventory, Lansing, MI. 2pp.

  • Clemants, Steven and Carol Gracie. 2006. Wildflowers in the Field and Forest. A Field Guide to the Northeastern United States. Oxford University Press, New York, NY. 445 pp.

  • Cooperrider, T. S. 1995. The Dicotyledoneae of Ohio, Part 2: Linaceae through Campanulaceae. Ohio State University Press, Columbus. 656 pp.

  • Correll, D.S., and M.C. Johnston. 1970. Manual of the vascular plants of Texas. Texas Research Foundation, Renner. 1881 pp.

  • Deam, C. C. 1940. Flora of Indiana. Division of Forestry, Dept. of Conservation, Indianapolis, Indiana. 1236 pp.

  • Farnsworth EJ, DiGregorio MJ. 2002. Asclepias purpurascens L. (Purple Milkweed) Conservation and Research Plan. New England Plant Conservation Program, Framingham, Massachusetts, USA. http://www.newfs.org/docs/pdf/Asclepeaspurpurascens.pdf/.

  • Fernald, M.L. 1950. Gray's manual of botany. 8th edition. D. Van Nostrand, New York. 1632 pp.

  • Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York. 910 pp.

  • Holmgren, Noel. 1998. The Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the Vascular Plants of Northeastern United States and Adjacent Canada. The New York Botanical Garden, Bronx, New York.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Kartesz, J.T. 1996. Species distribution data at state and province level for vascular plant taxa of the United States, Canada, and Greenland (accepted records), from unpublished data files at the North Carolina Botanical Garden, December, 1996.

  • Mohlenbrock, R.H. 1986. Guide to the vascular flora of Illinois. Southern Illinois University Press, Carbondale and Edwardsville, Illinois. 507 pp.

  • New York Natural Heritage Program. 2010. Biotics database. New York Natural Heritage Program. New York State Department of Environmental Conservation. Albany, NY.

  • Newcomb, Lawrence. 1977. Newcomb's Wildflower Guide: An Ingenious New Key System for Quick, Positive Field Identification of the Wildflowers, Flowering Shrubs, and Vines of Northeastern and North-Central North America. Little, Brown and Company. Boston.

  • Rhoads, Ann F. and Timothy A. Block. 2000. The Plants of Pennsylvania, an Illustrated Manual. University of Pennsylvania Press, Philadelphia, PA.

  • Rintz, R.E. 2014. A naturally occurring hybrid between Asclepias syriaca L. and A. purpurascens L. (Apocynaceae, Asclepiadoidea). Phytologia 96(2): 130-134.

  • Steyermark, J.A. 1963. Flora of Missouri. Iowa State Univ. Press, Ames. 1728 pp.

  • Sutherland, D.A. 1987. Annotated Checklist of the Plants of Haldimand-Norfolk. In: M.E. Gartshore, D.A. Sutherland and J.D. McCracken. The Natural Areas Inventory of Haldimand-Norfolk, Volume 2. Annotated Lists. Norfolk Field Naturalists, Simcoe. 152 pp.

  • Swink, F., and G. Wilhelm. 1994. Plants of the Chicago Region. Morton Arboretum. Lisle, Illinois.

  • Vande Water Natural Resource Services. 2003. Conservation assessment for Purple Milkweed (Asclepias purpurascens). Prepared for USDA Forest Service, Region 9 (Eastern Region). Available at http://www.fs.fed.us/r9/wildlife/tes/ca-overview/plants.html.

  • Voss, Edward G. 1996. Michigan Flora Part III. Dicots Concluded (Pyrolaceae - Compositae). Cranbrook Institute of Science Bulletin 61 and University of Michigan Herbarium. 622 pp.

  • Weldy, T. and D. Werier. 2010. New York flora atlas. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research http://www.fccdr.usf.edu/. University of South Florida http://www.usf.edu/]. New York Flora Association http://wwws.nyflora.org/, Albany, New York

  • Weldy, Troy W. and David Werier. 2005. New York Flora Atlas. [S.M. Landry, K.N. Campbell, and L.D. Mabe (original application development), Florida Center for Community Design and Research. University of South Florida]. New York Flora Association, Albany, NY. Available on the web at (http://atlas.nyflora.org/).

  • Woodson, R.E., Jr. 1954. The North American species of Asclepias L. Annals of the Missouri Botanical Garden 41(1): 1-211.

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