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, Geneva, Greene, Houston, Marengo, Mobile, Montgomery, Sumter, Tuscaloosa, Washington

Counties represented by specimen data listed below:

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

Range of years during which specimens were collected: -

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
TROY000039021 Butler 02 Sep 2013 Alvin R. Diamond
24503
TROY
Asclepias perennis Walter
UNA00038417 Mobile 6 Aug 1979 L. J. Davenport
1450
UNA
Asclepias perennis Walt.
AUA000030105 Baldwin 29 JUN 1977 BOTTS, DANIEL A.
011
AUA
ASCLEPIAS PERENNIS WALTER
UWAL0010315 Marengo 30 Jun 2012 England, J. Kevin
3589
UWAL
Asclepias perennis Walter
UWAL0000412 Baldwin 03 Jun 2007 Keener, Brian R.
3639
UWAL
Asclepias perennis Walt.
UNA00038414 Tuscaloosa 7 Sep 1938 Roland M. Harper
3697
UNA
Asclepias perennis Walt.
TROY000001273 Butler 19 Jun 2004 Alvin R. Diamond
14444
TROY
Asclepias perennis Walter
UNA00022517 Greene 5 Aug 1969 Joab L. Thomas
2335
UNA
Asclepias perennis Walt.
UWAL0031224 Washington 28 May 2015 Keener, Brian R.
8891
UWAL
Asclepias perennis Walt.
AUA000030112 Crenshaw 12 JUL 2006 DIAMOND, JR., ALVIN R.
16680
AUA
ASCLEPIAS PERENNIS WALTER
JSU111084 Tuscaloosa 22 Jul 2000 D. D. Spaulding
10799
JSU
Asclepias perennis Walter
USAM000001600 Mobile 01 Nov 1980 Michel G. Lelong
11805
USAM
Asclepias perennis Walter
AUA000030113 Marengo 28 AUG 1969 MOORE, HAROLD D.
679-69
AUA
ASCLEPIAS PERENNIS WALTER
UWAL0018597 Covington 26 Jul 1990 Kral, R.
78115
UWAL
Asclepias perennis Walt.
TROY000001274 Crenshaw 12 Jul 2006 Alvin R. Diamond
16680
TROY
Asclepias perennis Walter
USAM000001598 Baldwin 30 Jul 1976 Michel G. Lelong
9321
USAM
Asclepias perennis Walter
AUA000030108 Choctaw 6 JUN 1994 CROUCH, VIRGINIA E.
964
AUA
ASCLEPIAS PERENNIS WALTER
AUA000030109 Clarke 21 MAY 1981 HENDERSON, T.
100
AUA
ASCLEPIAS PERENNIS WALTER
UNA00038418 Mobile 1 Sep 1879 Charles Mohr
s.n.
UNA
Asclepias perennis Walt.
UWAL0016920 Baldwin 14 Oct 2012 England, J. Kevin
3998
UWAL
Asclepias perennis Walter
TROY000030750 Clarke 21 May 1981 T. Henderson
100
TROY
Asclepias perennis Walter
UNA00050722 Geneva 14 Jun 1997 John R. MacDonald
10692
UNA
Asclepias perennis Walt.
TROY000036072 Bullock 24 May 2012 Bailee Dykes
796
TROY
Asclepias perennis Walter
UWAL0014143 Butler 02 Sep 2013 Diamond, Alvin R.
24503
UWAL
Asclepias perennis Walter
USAM000001596 Mobile 01 Nov 1980 Michel G. Lelong
11810
USAM
Asclepias perennis Walter
UNA00038415 Geneva 12 Jul 1978 Robert R. Haynes
6709
UNA
Asclepias perennis Walt.
AMAL00003547 Houston 20 May 2006 R. Kral
97418
AMAL
Asclepias perennis Walt.
UNA00048710 Marengo 4 Jul 1980 John H. Wiersema
1958
UNA
Asclepias perennis Walt.
AUA000030110 Conecuh 28 JUN 1986 DIAMOND, JR., ALVIN R.
2587
AUA
ASCLEPIAS PERENNIS WALTER
USAM000001599 Baldwin 20 Jun 1970 Michel G. Lelong
5421
USAM
Asclepias perennis Walter
USAM000001597 Mobile 01 Nov 1980 Michel G. Lelong
11810
USAM
Asclepias perennis Walter
UNA00038420 Greene 4 Apr 1966 Rebecca Deramus
s.n.
UNA
Asclepias perennis Walt.
AMAL00007514 Houston 20 Jun 1978 R. Kral
62111
AMAL
Asclepias perennis Walt.
UWAL0010170 Houston 20 May 2006 Kral, R.
97418
UWAL
Asclepias perennis Walt.
UWAL0016783 Butler 28 Oct 2013 Webb, Wayne
s.n.
UWAL
Asclepias perennis Walter
AUA000030107 Choctaw 6 JUN 1994 CROUCH, VIRGINIA E.
977
AUA
ASCLEPIAS PERENNIS WALTER
AUA000030111 Covington 24 MAY 1979 JOHNSON, KENNETH G.
AUA
ASCLEPIAS PERENNIS WALTER
TROY000042111 Houston 07 May 2015 Alvin R. Diamond
26276
TROY
Asclepias perennis Walter
AUA000030114 Sumter 18 JUN 1970 MOORE, HAROLD D.
088
AUA
ASCLEPIAS PERENNIS WALTER
UWAL0014801 Bullock 24 May 2012 Dykes, Bailee
0796
UWAL
Asclepias perennis Walter
TROY000033017 Geneva 14 Aug 2011 Alvin R. Diamond
22410
TROY
Asclepias perennis Walter
AMAL00011871 Crenshaw 12 Jul 2006 A. R. Diamond
16680
AMAL
Asclepias perennis Walt.
AUA000030106 Choctaw 27 JUL 1994 CROUCH, VIRGINIA E.
1116
AUA
ASCLEPIAS PERENNIS WALTER
UWAL0017947 Clarke 07 Sep 2003 Keener, Brian R.
2972
UWAL
Asclepias perennis Walt.
UNA00067057 Baldwin 3 Jun 2007 Brian R. Keener
3639
UNA
Asclepias perennis Walt.
UWAL0000413 Marengo 02 Oct 2008 England, J. Kevin
1283
UWAL
Asclepias perennis Walt.
TROY000035186 Houston 20 May 2006 Robert Kral
97418
TROY
Asclepias perennis Walter
UNA00038416 Montgomery 17 Aug 1978 L. J. Davenport
754
UNA
Asclepias perennis Walt.
TROY000014466 Baldwin 03 Jun 2007 Brian R. Keener
3639
TROY
Asclepias perennis Walter
UWAL0015862 Butler 02 Sep 2013 Diamond, Alvin R.
24503
UWAL
Asclepias perennis Walter
USAM000001601 Mobile 01 Nov 1980 Michel G. Lelong
11810
USAM
Asclepias perennis Walter
UNA00038419 Greene 25 May 1978 Robert R. Haynes
6470
UNA
Asclepias perennis Walt.
TROY000039005 Butler 28 Oct 2013 Wayne K. Webb
s.n.
TROY
Asclepias perennis Walter
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