Convolvulus fraterniflorus

Family:CONVOLVULACEAE
Species:Convolvulus fraterniflorus (Mack. & Bush) Mack. & Bush
Common Name:Twin-Flowered Bindweed
Habitat:Streambanks, lake margins, fields, roadside ditches, railroad tracks and other waste places; frequent in the Appalachian Highlands, infrequent on the Coastal Plain; late May-October.
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Annual
Category:Vascular
USDA Symbol:**
Plant Notes:Twin-Flowered Bindweed is a native herbaceous vine in the Morning-Glory family (Convolvulaceae). It is found primarily in the northern half of Alabama. Twin-Flowered Bindweed occurs on streambanks, along lake margins, in low fields, along wet roadside ditches. It is a perennial from a creeping rhizome. The stems are up to 12 feet in length and climb by twining. The stems are green or reddish brown in color, glabrous, and round in cross section. Leaves are alternate, petiolate, triangular-ovate to sagittate or hastate in outline, glabrous or slightly pubescent on the under surface, with entire margins. Both stems and leaves release a white latex when damaged. Flowers are solitary or rarely paired from the axils of the middle and upper leaves. Two large bracts enclose the developing flowers. The bracts are inflated and their margins overlap for at least half their length. The corolla is funnelform and white or pinkish in color. The fruit is a capsule with 2-4 seed. Until recently this species was treated as a variety of Calystegia sepium or Calystegia sylvatica.—A. Diamond
Taxonomic Notes:**
Status:Native
References: Spaulding, D.D. 2013. Key to the bindweeds (Calystegia/Convolvulus, Convolvulaceae) of Alabama and adjacent states. Phytoneuron 2013-83: 1–12.
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyCONVOLVULACEAE - Morning-Glory family
Genus Convolvulus
Species Convolvulus fraterniflorus (Mack. & Bush) Mack. & Bush - Twin-Flowered Bindweed

Citation

Citation Convolvulus fraterniflorus (Mack. & Bush) Mack. & Bush, Rep. (Annual) Missouri Bot. Gard. 16: 104. 1905.
Basionym: Convolvulus sepium var. fraterniflorus Mack. & Bush 1902.
Type: USA: MISSOURI: Jackson Co.: Martin City, 9 Jul 1899, Mackenzie & Bush s.n. (holotype: ?)

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Calystegia fraterniflora Calystegia fraterniflora (Mack. & Bush) Brummitt, Ann. Missouri Bot. Gard. 52(2): 216. 1965.Convolvulus sepium var. fraterniflorus Mack. & Bush 1902. 
Calystegia sepium var. fraterniflora Calystegia sepium var. fraterniflora (Mack. & Bush) Shinners, Sida 3(4): 282. 1968.Convolvulus sepium var. fraterniflorus Mack. & Bush 1902. 
Convolvulus sepium Mack. & Bush Convolvulus sepium var. fraterniflorus Mack. & Bush, Man. Fl. Jackson County 153. 1902. MISSOURI
Convolvulus silvatica subsp. fraterniflora Calystegia silvatica subsp. fraterniflora (Mack. & Bush) Brummitt, Kew Bull. 35(2): 332. 1981.Convolvulus sepium var. fraterniflorus Mack. & Bush 1902. 

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: Calhoun, Colbert, DeKalb, Etowah, Jackson, Jefferson, Limestone, Marshall, Mobile, Montgomery, Morgan, Perry, Talladega

Counties represented by specimen data listed below:

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

Range of years during which specimens were collected: 2015 - 2015

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
AMAL00016773 Montgomery 05 Jul 2009 Diamond, Alvin R.
20783
AMAL
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
JSU119974 Marshall 12 Jun 1992 Spaulding, Daniel D.
2003
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
JSU119972 Jefferson 17 Oct 1975 Whetstone, R. David
7254
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
JSU119971 Jefferson 15 Aug 1984 Barber, J. Patrick
954
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
JSU119962 Calhoun 5 Oct 1986 Lawler, Carol L.
1327
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
UWAL0034210 Limestone 16 Aug 2015 Spaulding, Daniel D.
14405
UWAL
Calystegia silvatica (Kit.) Griseb. ssp. fraterniflora (Mackenzie & Bush) Brummitt
ALNHS00004358 DeKalb 01 Sep 2016 Barger, T. Wayne
SP#2482
ALNHS
Convolvulus fraterniflorus (Mackenzie & Bush) Mackenzie & Bush
BRIT54429 Mobile 02 Jun 1972 Kral, Robert
47115
BRIT
Calystegia silvatica Griseb. ssp. fraterniflora
JSU119967 Jackson 13 Aug 1998 Brodeur, Kristin R.
1220
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
UWAL0051824 Morgan 15 Jul 2018 Spaulding, Daniel D.
15479
UWAL
Convolvulus fraterniflorus (Mackenzie & Bush) Mackenzie & Bush
AMAL00023615 Limestone 16 Aug 2015 Spaulding, Daniel D.
14405
AMAL
Calystegia silvatica (Kit.) Griseb. ssp. fraterniflora (Mackenzie & Bush) Brummitt
SAMF0007488 Jefferson 02 Jun 2018 Spaulding, Daniel D.
15,337
SAMF
Convolvulus fraterniflorus (Mack. & Bush) Mack. & Bush
BRIT54430 Mobile 02 Jun 1972 Kral, Robert
47115
BRIT
Calystegia silvatica Griseb. ssp. fraterniflora
UWAL0007267 Montgomery 05 Jul 2009 Diamond, Alvin R.
20783
UWAL
Calystegia silvatica (Kit.) Griseb. ssp. fraterniflora (Mackenzie & Bush) Brummitt
AUA_ACC_41590 Talladega 25 Jun 1973 Hanlin, H.G.
127
AUA
Calystegia Silvatica (Kit.) Griseb. Ssp. Fraterniflora (Mack. & Bush) Brummitt
JSU119968 Jackson 26 May 1973 Whetstone, R. David
1529
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
AUA_ACC_72442 Calhoun 12 Aug 2013 Spaulding, Daniel D.
13836
AUA
Calystegia Silvatica (Kit.) Griseb. Ssp. Fraterniflora (Mackenzie & Bush) Brummitt
BRIT54432 Limestone 24 Aug 1991 Kral, Robert
79624
BRIT
Calystegia silvatica Griseb. ssp. fraterniflora
AMAL00007137 Calhoun 12 Aug 2013 Spaulding, Daniel D.
13836
AMAL
Calystegia silvatica (Kit.) Griseb. Ssp. fraterniflora (Mackenzie & Bush) Brummitt
JSU119977 Marshall 13 Jul 1996 Spaulding, Daniel D.
9043
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
JSU119969 Jefferson 17 Oct 1975 Whetstone, R. David
7254
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
AUA_ACC_71175 Perry 17 Jun 2013 Barger, T. Wayne
SP1185
AUA
Calystegia Silvatica (Kit.) Griseb. Ssp. Fraterniflora (Mackenzie & Bush) Brummitt
JSU119970 Jefferson 28 May 1984 Barber, J. Patrick
411
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
JSU119963 DeKalb 26 Jul 1975 Wayner, Gary A.
544
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
UWAL0051790 Jackson 11 Aug 2018 Spaulding, Daniel D.
15562
UWAL
Convolvulus fraterniflorus (Mack. & Bush) Mackenzie & Bush
JSU119966 Jackson 27 Jun 1998 Brodeur, Kristin R.
876
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
ALNHS00003898 Colbert 11 May 2016 Barger, T. Wayne
FH-684
ALNHS
Convolvulus fraterniflorus (Mackenzie & Bush) Mackenzie & Bush
BRIT54431 Marshall 25 Jun 1992 Spaulding, Daniel D.
2116
BRIT
Calystegia silvatica Griseb. ssp. fraterniflora
JSU119973 Limestone 26 May 1996 Whetstone, R. David
17750
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
UWAL0016587 Calhoun 12 Aug 2013 Spaulding, Daniel D.
13836
UWAL
Calystegia silvatica (Kit.) Griseb. ssp. fraterniflora (Mackenzie & Bush) Brummitt
BRIT54428 Mobile 27 Jun 1974 Kral, Robert
53556
BRIT
Calystegia silvatica Griseb. ssp. fraterniflora
JSU119964 Etowah 31 Jul 1994 Hodge, Lesley M.
2916
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
ALNHS00001323 Mobile 11 Jul 2012 Barger, T. Wayne
SP#639
ALNHS
Convolvulus fraterniflorus (Mackenzie & Bush) Mackenzie & Bush
UWAL0047544 Jefferson 02 Jun 2018 Spaulding, Daniel D.
15337
UWAL
Convolvulus fraterniflorus (Mackenzie & Bush) Mackenzie & Bush
UWAL0051834 Etowah 11 Jul 2018 Spaulding, Daniel D.
15456
UWAL
Convolvulus fraterniflorus (Mackenzie & Bush) Mackenzie & Bush
ALNHS00003274 Limestone 22 Jun 2015 Barger, T. Wayne
SP#1784
ALNHS
Convolvulus fraterniflorus (Mackenzie & Bush) Mackenzie & Bush
JSU119965 Jackson 11 Sep 1994 Spaulding, Daniel D.
6272
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
JSU119975 Marshall 9 Sep 1991 Spaulding, Daniel D.
838
JSU
Calystegia silvatica (Kitaibel) Grisebach ssp. fraterniflora (Mackenzie & Bush) Brummitt
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