Asclepias longifolia

Family:APOCYNACEAE
Species:Asclepias longifolia Michx.
Common Name:Longleaf Milkweed; Savannah Milkweed
Habitat:Bogs, savannahs, and pine flatwoods.
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Perennial
Category:Vascular
USDA Symbol:ASLO
Plant Notes:Longleaf Milkweed is a native herbaceous perennial in the Dogbane family (Apocynaceae). It is native to the southern half of Alabama. Longleaf Milkweed occurs in pine savannahs, in bogs, and on wet roadsides. It is a perennial with a thick taproot. The stems are 1-2 from each root crown. Stems are erect to ascending, unbranched, reddish in color, and sparsely pubescent. The stems are 1-2 feet in length. Leaves are sub-opposite to whorled, sessile, linear in outline, glabrous, with entire margins. Flowers are produced in umbels. The umbels are located in the axils of the upper leaves. The pedicels are pubescent with curved hairs. Each umbel has 20-30 flowers. The corollas are white with rose-purple tips. Horns are absent. The fruit is a follicle. All parts of the plant contain a milky white sap. Longleaf Milkweed is not commercially available. Plants can be grown from seed. The seed should be cold stratified for at least 30 days before they are planted. Longleaf Milkweed prefers an acidic sandy soil in full sun.--A. Diamond
Taxonomic Notes:**
Status:Native, FACW+ (NWI)
References:**

** Not applicable or data not available.

Classification

FamilyAPOCYNACEAE - Dogbane family
Genus Asclepias
Species Asclepias longifolia Michx. - Longleaf Milkweed; Savannah Milkweed

Citation

Citation Asclepias longifolia Michaux, Fl. Bor.-Amer. 1: 116–117. 1803.
Basionym: **
Type: USA: GEORGIA:

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Acerates delticola Acerates delticola Small, Man. S.E. Fl. 1067, 1505. 1933. LOUISIANA: Orleans Par.: New Orleans, 1834, Ingalls s.n. (holotype: NY).
Acerates incarnata Acerates incarnata Decaisne, in de Candolle, Prodr. 8: 523. 1844.  
Gomphocarpus longifolius Gomphocarpus longifolius (Michaux) Sprengel, Syst. Veg. 1: 849. 1824 ("1825").Asclepias longifolia Michaux 1803. 
Oligoron longifolium Oligoron longifolium (Michaux) Rafinesque, New Fl. 4: 60. 1838 ("1836").Asclepias longifolia Michaux 1803. 
Oligoron tenuifolium Oligoron tenuifolium Rafinesque, New Fl. 4: 60. 1838 ("1836"). ARKANSAS
Polyotus longifolius Polyotus longifolius (Michaux) Nuttall, Trans. Amer. Philos. Soc., ser. 2. 5: 200. 1837.Asclepias longifolia Michaux 1803. 
Acerates floridana Acerates floridana Hitchcock, Trans. Acad. Sci. St. Louis 5: 508. 1891. FLORIDA
Acerates longifolia Acerates longifolia (Michaux) Elliott, Sketch Bot. S. Carolina 1: 317. 1817.Asclepias longifolia Michaux 1803. 

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, Covington, Elmore, Escambia, Geneva, Houston, Mobile, Monroe, Montgomery, Pike, Russell, Washington

Counties represented by specimen data listed below:

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

Range of years during which specimens were collected: 1893 - 1966

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
BRIT71580 Geneva 08 May 2000 Kral, Robert
89593
BRIT
Asclepias longifolia Michx.
UWAL0042864 Baldwin 20 Jul 2000 Larsen, Harry S.
427
UWAL
Asclepias longifolia Michx.
AUA000030045 Washington 30 May 2009 Keener, Brian R.
5416
AUA
Asclepias Longifolia Michx.
USAM000001580 Mobile 10 May 1969 Holmes, Paul D.
11
USAM
Asclepias longifolia Michaux
AUA000030037 Baldwin 29 Apr 1967 Golden, Michael
70
AUA
Asclepias Longifolia Michx.
BRIT71577 Mobile 30 Apr 1968 Demaree, Delzie
57754
BRIT
Asclepias longifolia Michx.
ALNHS00000015 Mobile 31 May 1998 Spaulding, Daniel D.
10257
ALNHS
Asclepias longifolia Michx.
AUA000030036 Baldwin 10 Jul 1977 Ahrens, W.H.
140
AUA
Asclepias Longifolia Michx.
TROY000043787 Escambia 15 May 2016 Diamond, Alvin R.
27406
TROY
Asclepias longifolia Michaux
BRIT71579 Houston 07 May 1995 Kral, Robert
84547
BRIT
Asclepias longifolia Michx.
AMAL00012776 Butler 10 May 2007 Diamond, Alvin R.
17536
AMAL
Asclepias longifolia Michx.
AUA000030038 Baldwin 27 Jul 1968 Burttram, A.Kenneth
AUA
Asclepias Longifolia Michx.
ALNHS00000347 Baldwin 19 Jun 2008 Barger, T. Wayne
Perd-417
ALNHS
Asclepias longifolia Michx.
TROY000001266 Butler 10 May 2007 Diamond, Alvin R.
17536
TROY
Asclepias longifolia Michaux
SAMF0004371 Butler 10 May 2007 Diamond, Alvin R.
17536
SAMF
Asclepias longifolia Michaux
UWAL0014721 Washington 25 May 2014 England, J. Kevin
4875
UWAL
Asclepias longifolia Michaux
UNA00038402 Mobile 29 Apr 1893 Mohr, Charles
s.n.
UNA
Asclepias longifolia Michx.
TROY000014468 Russell 03 Jul 2008 Diamond, Alvin R.
19523
TROY
Asclepias longifolia Michaux
BRIT71584 Geneva 04 May 2002 Kral, Robert
92495
BRIT
Asclepias longifolia Michx.
ALNHS00003109 Washington 12 May 2015 Barger, T. Wayne
SP#1688
ALNHS
Asclepias longifolia Michx.
JSU111081 Mobile 16 May 1974 Landers, Kenneth E.
s.n.
JSU
Asclepias longifolia Michaux
AUA000030042 Escambia 30 Apr 1967 Barrick, William E.
AUA
Asclepias Longifolia Michx.
UNA00056071 Houston 13 Aug 1998 MacDonald, John R.
11727
UNA
Asclepias longifolia Michx.
BRIT71585 Covington 02 May 1999 MacDonald, John R.
12848
BRIT
Asclepias longifolia Michx.
TROY000039434 Covington 09 May 2014 Diamond, Alvin R.
25076
TROY
Asclepias longifolia Michaux
UWAL0015682 Bullock 10 May 2012 Dykes, Bailee
684
UWAL
Asclepias longifolia Michaux
TROY000036509 Bullock 10 May 2012 Dykes, Bailee
362
TROY
Asclepias longifolia Michaux
BRIT71566 Baldwin 27 Apr 1989 Orzell, Steve L.
9343
BRIT
Asclepias longifolia Michx. var. longifolia
UWAL0000411 Butler 10 May 2007 Diamond, Alvin R.
17536
UWAL
Asclepias longifolia Michx.
TROY000040679 Pike 25 Jun 2014 Diamond, Alvin R.
25249
TROY
Asclepias longifolia Michaux
ALNHS00006864 Escambia 24 Jun 2020 Barger, T. Wayne
SP#5217
ALNHS
Asclepias longifolia Michx.
SAMF0004370 Washington 30 May 2009 Keener, Brian R.
5416
SAMF
Asclepias longifolia Michaux
UNA00038405 Mobile 16 May 1965 Deramus, Rebecca
D483
UNA
Asclepias longifolia Michx. subsp. longifolia
UWAL0018798 Monroe 05 May 1988 Kral, Robert
74694
UWAL
Asclepias longifolia Michx.
BRIT71567 Baldwin 14 May 1983 Wilhelm, Gerould
11310
BRIT
Asclepias longifolia Michx.
AUA000030041 Escambia 30 Apr 1967 Rankin, H.Taylor
172
AUA
Asclepias Longifolia Michx.
TROY000031570 Montgomery 19 Jun 2010 Diamond, Alvin R.
21427
TROY
Asclepias longifolia Michaux
BRIT71582 Houston 13 Aug 1998 MacDonald, John R.
11727
BRIT
Asclepias longifolia Michx.
USAM000001581 Mobile 14 May 1968 LeLong, Michel G.
4595
USAM
Asclepias longifolia Michaux
TROY000049752 Geneva 25 Aug 2016 Byrd, Cameron
26
TROY
Asclepias longifolia Michx.
BRIT71578 Mobile 15 Apr 1967 Kral, Robert
28288
BRIT
Asclepias longifolia Michx.
TROY000045126 Geneva 13 Apr 2017 Byrd, Cameron
986
TROY
Asclepias longifolia Michaux
AUA000030044 Montgomery 24 Jun 1992 Diamond, Alvin R.
8336
AUA
Asclepias Longifolia Michx.
UWAL0001058 Washington 30 May 2009 Keener, Brian R.
5416
UWAL
Asclepias longifolia Michx.
AUA000030039 Covington 2 May 1994 Oberholster, Suzanne
670
AUA
Asclepias Longifolia Michx.
TROY000014469 Butler 18 May 2008 Diamond, Alvin R.
19267
TROY
Asclepias longifolia Michaux
UWAL0033045 Escambia 15 May 2016 Diamond, Alvin R.
27406
UWAL
Asclepias longifolia Michaux
BRIT71576 Washington 08 May 1966 Kral, Robert
26487
BRIT
Asclepias longifolia Michx.
UWAL0035554 Mobile 23 Apr 2015 Horne, Howard E.
2837
UWAL
Asclepias longifolia Michaux
AUA000030043 Mobile 4 Jun 1998 C, D G
VI 25
AUA
Asclepias Longifolia Michx.
USAM000001584 Mobile 10 Jun 1980 LeLong, Michel G.
11121
USAM
Asclepias longifolia Michaux
BRIT71586 Choctaw 29 Jul 1980 Causey, Ann S.
2065
BRIT
Asclepias longifolia Michx.
ALNHS00000296 Mobile 04 Jun 1998 Crow, D.G.
s.n.
ALNHS
Asclepias longifolia Michx.
AMAL00010403 Washington 30 May 2009 Keener, Brian R.
5416
AMAL
Asclepias longifolia Michx.
TROY000033134 Bullock 03 Jul 2011 Diamond, Alvin R.
22309
TROY
Asclepias longifolia Michaux
BRIT71588 Baldwin 09 Jun 1969 Kral, Robert
35192
BRIT
Asclepias longifolia Michx.
BRIT71587 Bullock 11 Jul 2002 Kral, Robert
92926
BRIT
Asclepias longifolia Michx.
UWAL0016382 Pike 25 Jun 2014 Diamond, Alvin R.
25249
UWAL
Asclepias longifolia Michaux
USAM000001583 Baldwin 09 Jun 1969 Kral, Robert
35192
USAM
Asclepias longifolia Michaux
AUA000030040 Elmore 7 Jul 1970 Moore, Harold D.
182
AUA
Asclepias Longifolia Michx.
USAM000001582 Baldwin 07 May 1977 LeLong, Michel G.
720
USAM
Asclepias longifolia Michaux
SAMF0007595 Washington 06 May 2021 Davenport, L.J.
6883
SAMF
Asclepias longifolia Michaux
UWAL0002213 Montgomery 19 Jun 2010 Diamond, Alvin R.
21427
UWAL
Asclepias longifolia Michx.
BRIT71581 Geneva 04 May 2002 Kral, Robert
92495
BRIT
Asclepias longifolia Michx.
TROY000032351 Washington 30 May 2009 Keener, Brian R.
5416
TROY
Asclepias longifolia Michaux
JSU136357 Mobile 31 May 1998 Spaulding, Daniel D.
10257
JSU
Asclepias longifolia Michaux
UNA00038404 Mobile 30 May 1966 Deramus, Rebecca
D925
UNA
Asclepias longifolia Michx. subsp. longifolia
BRIT71589 Baldwin 22 May 1975 Kral, Robert
55710
BRIT
Asclepias longifolia Michx.
AMAL00016923 Baldwin 19 Jun 2008 Barger, T. Wayne
Perd-417
AMAL
Asclepias longifolia Michx.
UWAL0008094 Bullock 03 Jul 2011 Diamond, Alvin R.
22309
UWAL
Asclepias longifolia Michx.
TROY000001267 Escambia 19 May 2002 Diamond, Alvin R.
13200
TROY
Asclepias longifolia Michaux
BRIT71583 Houston 21 Jul 1997 MacDonald, John R.
10878
BRIT
Asclepias longifolia Michx.
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