Asclepias perennis

Family:APOCYNACEAE
Species:Asclepias perennis Walter
Common Name:Swamp Forest Milkweed; Shore Milkweed; Aquatic Milkweed
Habitat:Swamps and floodplain forests.
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Perennial
Category:Vascular
USDA Symbol:ASPE
Plant Notes:Swamp Forest Milkweed is a native perennial in the Dogbane family (Apocynaceae). It can be found in the southern two-thirds of Alabama. Swamp Forest Milkweed grows in swamps, in floodplain forests, along creeks and streams, and around beaver ponds. It is a perennial from a woody crown. Decumbent stems root, forming colonies. Stems are erect, unbranched, and sparsely pubescent to glabrous, and green or purple in color. Leaves are opposite, petiolate, elliptic to ovate in outline, and entire. Leaves are glabrous to sparsely pubescent. Both the stems and leaves exude a milky white sap when damaged. Flowers are produced in umbels from the axils of the upper leaves. Each umbel contains 20-50 white or pinkish flowers. Flowers are slightly fragrant. The fruit is a follicle (a dry fruit that splits along one side). Follicles are erect when young and then droop as they mature. The seed lack the tuffs of hairs common in other Milkweed species. Instead they have an expanded seed coat that allows them to float. Swamp Forest Milkweed is occasionally available from wildflower nurseries. In requires a wet location to thrive. Plant will even grow in shallow standing water. Swamp Forest Milkweed can be used in bog gardens, in shallow pools, and along streams or ponds. Plants can also be grown from seed, or rooted from cuttings. Large clumps can be divided.--A. Diamond
Taxonomic Notes:**
Status:Native, OBL (NWI)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyAPOCYNACEAE - Dogbane family
Genus Asclepias
Species Asclepias perennis Walter - Swamp Forest Milkweed; Shore Milkweed; Aquatic Milkweed

Citation

Citation Asclepias perennis Walter, Fl. Carol. 107. 1788.
Basionym: **
Type: SOUTH CAROLINA: Berkeley Co.: Palmer Bridge, 5 mi. ESE of Honey Hill, 27 Jun 1939, Godfrey & Tryon 130 (neotype: GH; isoneotypes: CA, NY, US). Neotypified by D. B. Ward, J. Bot. Res. Inst. Texas 1: 1097. 2007.

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Asclepias debilis Asclepias debilis Michaux, Fl. Bor.-Amer. 1: 116. 1803. SOUTH CAROLINA
Asclepias lancifolia Asclepias lancifolia Rafinesque, Autik. Bot. 177. 1840. FLORIDA
Asclepias parviflora Asclepias parviflora Aiton, Hort. Kew. 1: 307. 1789. "Carolina and East Florida"
Asclepias parviflora var. latifolia Asclepias parviflora Aiton, var. latifolia Rafinesque, Autik. Bot. 179. 1840. FLORIDA
Asclepias pulchella Asclepias pulchella Salisbury, Prodr. Stirp. Chap. Allerton 150. 1796, nom. illegit.Asclepias parviflora Aiton 1789. 

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Baldwin, Bullock, Butler, Choctaw, Clarke, Conecuh, Covington, Crenshaw, Dallas, Geneva, Greene, Houston, Marengo, Mobile, Montgomery, Sumter, Tuscaloosa, Washington

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AMAL, AUA, BRIT, JSU, TROY, UNA, USAM, UWAL

Range of years during which specimens were collected: 1879 - 1997

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
TROY000048071 Baldwin 12 Nov 1993 Blythe, Fennel
17
TROY
Asclepias perennis Walter
UNA00048710 Marengo 04 Jul 1980 Wiersema, John H.
1958
UNA
Asclepias perennis Walt.
UWAL0000413 Marengo 02 Oct 2008 England, J. Kevin
1283
UWAL
Asclepias perennis Walt.
UNA00038418 Mobile 01 Sep 1879 Mohr, Charles
s.n.
UNA
Asclepias perennis Walt.
AUA000030107 Choctaw 6 Jun 1994 Crouch, Virginia E.
977
AUA
Asclepias Perennis Walt.
AMAL00007514 Houston 20 Jun 1978 Kral, Robert
62111
AMAL
Asclepias perennis Walt.
BRIT71482 Geneva 14 Jun 1997 MacDonald, John R.
10692
BRIT
Asclepias perennis Walter
UWAL0000412 Baldwin 03 Jun 2007 Keener, Brian R.
3639
UWAL
Asclepias perennis Walt.
AMAL00011871 Crenshaw 12 Jul 2006 Diamond, Alvin R.
16680
AMAL
Asclepias perennis Walt.
AUA000030110 Conecuh 28 Jun 1986 Diamond, Alvin R.
2587
AUA
Asclepias Perennis Walt.
BRIT71484 Dallas 27 Jun 1964 Demaree, Delzie
50594
BRIT
Asclepias perennis Walter
ALNHS00001266 Clarke 22 May 2012 Horne, Howard E.
SWS-194
ALNHS
Asclepias perennis Walt.
AUA000030105 Baldwin 29 Jun 1977 Botts, Daniel A.
011
AUA
Asclepias Perennis Walt.
UNA00038414 Tuscaloosa 07 Sep 1938 Harper, Roland M.
3697
UNA
Asclepias perennis Walt.
USAM000001598 Baldwin 30 Jul 1976 LeLong, Michel G.
9321
USAM
Asclepias perennis Walter
UNA00050722 Geneva 14 Jun 1997 MacDonald, John R.
10692
UNA
Asclepias perennis Walt.
USAM000001597 Mobile 01 Nov 1980 LeLong, Michel G.
11810
USAM
Asclepias perennis Walter
UWAL0042867 Baldwin 08 Jul 2001 Larsen, Harry S.
875
UWAL
Asclepias perennis Walter
BRIT71480 Greene 25 May 1978 Haynes, Robert R.
6470
BRIT
Asclepias perennis Walter
BRIT71498 Marengo 04 Jul 1980 Wiersema, John H.
1958
BRIT
Asclepias perennis Walter
TROY000033017 Geneva 14 Aug 2011 Diamond, Alvin R.
22410
TROY
Asclepias perennis Walter
BRIT71486 Choctaw 30 Jul 1980 Causey, Ann S.
2069
BRIT
Asclepias perennis Walter
UWAL0014801 Bullock 24 May 2012 Dykes, Bailee
796
UWAL
Asclepias perennis Walter
BRIT71495 Houston 09 Jun 1968 Kral, Robert
31318
BRIT
Asclepias perennis Walter
USAM000001599 Baldwin 20 Jun 1970 LeLong, Michel G.
5421
USAM
Asclepias perennis Walter
AUA000030111 Covington 24 May 1979 Johnson, Kenneth G.
AUA
Asclepias Perennis Walt.
AMAL00003547 Houston 20 May 2006 Kral, Robert
97418
AMAL
Asclepias perennis Walt.
BRIT71497 Houston 24 May 1967 McDaniel, Sidney
9053
BRIT
Asclepias perennis Walter
UNA00038415 Geneva 12 Jul 1978 Haynes, Robert R.
6709
UNA
Asclepias perennis Walt.
UNA00067057 Baldwin 03 Jun 2007 Keener, Brian R.
3639
UNA
Asclepias perennis Walt.
TROY000030750 Clarke 21 May 1981 Henderson, T.
100
TROY
Asclepias perennis Walter
BRIT71499 Mobile 06 Aug 1979 Davenport, L.J.
1450
BRIT
Asclepias perennis Walter
UNA00038420 Greene 04 Apr 1966 Deramus, Rebecca
s.n.
UNA
Asclepias perennis Walt.
TROY000042111 Houston 07 May 2015 Diamond, Alvin R.
26276
TROY
Asclepias perennis Walter
UWAL0010170 Houston 20 May 2006 Kral, Robert
97418
UWAL
Asclepias perennis Walt.
UNA00038419 Greene 25 May 1978 Haynes, Robert R.
6470
UNA
Asclepias perennis Walt.
USAM000001600 Mobile 01 Nov 1980 LeLong, Michel G.
11805
USAM
Asclepias perennis Walter
UWAL0010315 Marengo 30 Jun 2012 England, J. Kevin
3589
UWAL
Asclepias perennis Walter
BRIT71483 Geneva 12 Jul 1978 Haynes, Robert R.
6709
BRIT
Asclepias perennis Walter
BRIT71507 Greene 05 Aug 1969 Thomas, Joab L.
2335
BRIT
Asclepias perennis Walter
UWAL0015862 Butler 02 Sep 2013 Diamond, Alvin R.
24503
UWAL
Asclepias perennis Walter
TROY000036072 Bullock 24 May 2012 Dykes, Bailee
796
TROY
Asclepias perennis Walter
UWAL0016920 Baldwin 14 Oct 2012 England, J. Kevin
3998
UWAL
Asclepias perennis Walter
TROY000051464 Baldwin 14 Oct 2012 England, J. Kevin
3998
TROY
Asclepias perennis Walter
AUA000030106 Choctaw 27 Jul 1994 Crouch, Virginia E.
1116
AUA
Asclepias Perennis Walt.
BRIT71500 Montgomery 24 Aug 1978 Kral, Robert
62608
BRIT
Asclepias perennis Walter
USAM000001601 Mobile 01 Nov 1980 LeLong, Michel G.
11810
USAM
Asclepias perennis Walter
UNA00038417 Mobile 06 Aug 1979 Davenport, Lawrence J.
1450
UNA
Asclepias perennis Walt.
TROY000035186 Houston 20 May 2006 Kral, Robert
97418
TROY
Asclepias perennis Walter
ALNHS00000572 Crenshaw 19 Aug 2011 Barger, T. Wayne
SP#333
ALNHS
Asclepias perennis Walt.
TROY000014466 Baldwin 03 Jun 2007 Keener, Brian R.
3639
TROY
Asclepias perennis Walter
BRIT71487 Choctaw 06 Jun 1994 Crouch, Virginia
977
BRIT
Asclepias perennis Walter
UWAL0017947 Clarke 07 Sep 2003 Keener, Brian R.
2972
UWAL
Asclepias perennis Walt.
TROY000039021 Butler 02 Sep 2013 Diamond, Alvin R.
24503
TROY
Asclepias perennis Walter
BRIT71503 Washington 14 Jul 1969 Kral, Robert
35580
BRIT
Asclepias perennis Walter
AUA000030114 Sumter 18 Jun 1970 Moore, Harold D.
088
AUA
Asclepias Perennis Walt.
UWAL0016783 Butler 28 Oct 2013 Webb, Wayne K.
s.n.
UWAL
Asclepias perennis Walter
AUA000030113 Marengo 28 Aug 1969 Moore, Harold D.
679-69
AUA
Asclepias Perennis Walt.
BRIT71481 Geneva 26 Apr 1967 McDaniel, Sidney
8798
BRIT
Asclepias perennis Walter
BRIT71502 Tuscaloosa 07 Sep 1938 Harper, Roland M.
3697
BRIT
Asclepias perennis Walter
BRIT71501 Tuscaloosa 22 Jul 2000 Spaulding, Daniel D.
10799
BRIT
Asclepias perennis Walter
UWAL0031224 Washington 28 May 2015 Keener, Brian R.
8891
UWAL
Asclepias perennis Walt.
AUA000030112 Crenshaw 12 Jul 2006 Diamond, Alvin R.
16680
AUA
Asclepias Perennis Walt.
UWAL0018597 Covington 26 Jul 1990 Kral, Robert
78115
UWAL
Asclepias perennis Walt.
AUA000030108 Choctaw 6 Jun 1994 Crouch, Virginia E.
964
AUA
Asclepias Perennis Walt.
BRIT71485 Covington 26 Jul 1990 Kral, Robert
78115
BRIT
Asclepias perennis Walter
TROY000001273 Butler 19 Jun 2004 Diamond, Alvin R.
14444
TROY
Asclepias perennis Walter
BRIT71496 Houston 09 Jun 1996 MacDonald, John R.
9578
BRIT
Asclepias perennis Walter
AUA000042050 Tuscaloosa 25 May 2018 Hansen, Curtis J.
7133
AUA
Asclepias Perennis Walt.
TROY000039005 Butler 28 Oct 2013 Webb, Wayne K.
s.n.
TROY
Asclepias perennis Walter
UWAL0014143 Butler 02 Sep 2013 Diamond, Alvin R.
24503
UWAL
Asclepias perennis Walter
AUA000030109 Clarke 21 May 1981 Henderson, T.
100
AUA
Asclepias Perennis Walt.
UNA00022517 Greene 05 Aug 1969 Thomas, Joab L.
2335
UNA
Asclepias perennis Walt.
JSU111084 Tuscaloosa 22 Jul 2000 Spaulding, Daniel D.
10799
JSU
Asclepias perennis Walter
BRIT71494 Houston 20 Jun 1978 Kral, Robert
62111
BRIT
Asclepias perennis Walter
USAM000001596 Mobile 01 Nov 1980 LeLong, Michel G.
11810
USAM
Asclepias perennis Walter
UNA00038416 Montgomery 17 Aug 1978 Davenport, Lawrence J.
754
UNA
Asclepias perennis Walt.
TROY000001274 Crenshaw 12 Jul 2006 Diamond, Alvin R.
16680
TROY
Asclepias perennis Walter
ALNHS00002160 Houston 18 Jun 2013 Barger, T. Wayne
SP#1058
ALNHS
Asclepias perennis Walt.
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