Rhynchosia difformis

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Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Species Distribution Map
Family:FABACEAE
Species:Rhynchosia difformis (Elliott) DC.
Common Name:Double Form Snout Bean
Habitat:**
Associated Ecological Communities:**
Growth Habit:Vine
Duration:Perennial
Category:Vascular
USDA Symbol:RHDI2
Plant Notes:Double Form Snout Bean is an herbaceous perennial member of the Bean family (Fabaceae). It occurs throughout the state but is most common in the Wiregrass region of southeast Alabama. Double Form Snout Bean grows in dry pine or pine/hardwood woodlands, in sandhills, in old fields, and on roadsides. It is a twining vine up to four feet in length. The stems are green in color and pubescent. The leaves are alternate, trifoliate, and pubescent at least on the lower surface. The leaflets are suborbicular to elliptic in outline with conspicuous netted veins and inconspicuous resin dots. Flowers are produced in racemes from the axils of the mid- to upper leaves. Flowers number from 3-8 per raceme. Flowers are papilionaceous, consisting of a banner or standard petal, two wing petals, and two united keel petals. The corolla is shorter than the calyx and the petals are yellow in color. The fruit is an ovate to oblong pubescent legume with a hooked beak. It contains one or two seeds.—A. Diamond
Taxonomic Notes:**
Status:Native
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyFABACEAE - Pea/Bean family
Genus Rhynchosia
Species Rhynchosia difformis (Elliott) DC. - Double Form Snout Bean

Citation

Citation Rhynchosia difformis (Elliott) A.P. de Candolle, Prodr. [A. P. de Candolle] 2: 384. 1825.
Basionym: Arcyphyllum difforme Elliott 1818.; REPLACED: Glycine tomentosa var. volubilis Michx. 1803
Type: **

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Arcyphyllum difforme Arcyphyllum difforme Elliott, J. Acad. Nat. Sci. Philadelphia 1: 372. 1818.Glycine tomentosa Linnaeus, var. volubilis Michaux 1803. 
Dolicholus lewtonii Dolicholus lewtonii Vail, Bull. Torrey Bot. Club 26: 113. 1899. FLORIDA: Orange Co.: Without locality, 7 Jul 1894, Lewton s.n. (holotype: NY; isotype: NY).
Dolicholus tomentosus var. undulatus Dolicholus tomentosus (Linnaeus) Vail, var. undulatus Vail, Bull. Torrey Bot. Club 26: 113. 1899. FLORIDA: Without data, 1846, Chapman s.n. (lectotype: MO; isolectotypes: F, GA, GH, LE, MISSA, MO, NY, PH, S). Lectotypified by Grear, Mem. New York Bot. Gard. 31: 123. 1978.
Glycine tomentosa var. volubilis Glycine tomentosa Linnaeus, var. volubilis Michaux, Fl. Bor.-Amer. 2: 63. 1803.  
Rhynchosia lewtonii Rhynchosia lewtonii (Vail) Small, Man. S.E. Fl. 714. 1933.Dolicholus lewtonii Vail 1899. 
Rhynchosia tomentosa var. volubilis Rhynchosia tomentosa (Linnaeus) Hooker & Arnott, var. volubilis (Michaux) Torrey & A. Gray, Fl. N. Amer. 1: 284. 1838.Glycine tomentosa Linnaeus, var. volubilis Michaux 1803. 
Rhynchosia volubilis Rhynchosia volubilis (Michaux) A. W. Wood, Class-Book Bot., ed. 1861. 321. 1861, nom. illegit. et non Loureiro 1790.Arcyphyllum difforme Elliott 1818; Glycine tomentosa Linnaeus, var. volubilis 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: Autauga, Baldwin, Barbour, Bibb, Bullock, Butler, Coffee, Crenshaw, Dale, Dallas, Fayette, Henry, Houston, Jackson, Macon, Montgomery, Pike, Sumter, Talladega

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AUA, TROY, UNA, UWAL

Range of years during which specimens were collected: 1892 - 1982

Barcode / Accession No. County Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used		 Image
UWAL0014800 Bullock 24 May 2012 Dykes, Bailee
786		 UWAL
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012960 Fayette 14 Sep 1954 Moore, William H.
 AUA
Rhynchosia Difformis (Ell.) Dc.
TROY000004298 Butler 09 Sep 2000 Diamond, Alvin R.
12123		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000043530 Sumter 18 Jul 2015 Keener, Brian R.
9028		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UNA00008813 Autauga 14 Jun 1982 Gunn, Scott C.
708		 UNA
Rhynchosia difformis (Ell.) DC.
UWAL0007027 Butler 21 Aug 2008 Diamond, Alvin R.
19805		 UWAL
Rhynchosia difformis (Ell.) DC.
AUA000012963 Montgomery 20 Jun 1993 Diamond, Alvin R.
8684		 AUA
Rhynchosia Difformis (Ell.) Dc.
TROY000033317 Barbour 24 Sep 2011 Morrison, Derek
110		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UWAL0032094 Houston 09 Jul 2015 Diamond, Alvin R.
26564		 UWAL
Rhynchosia difformis (Elliott) A.P. de Candolle
UWAL0030898 Sumter 25 Jul 2014 Finzel, Brian
s.n.		 UWAL
Rhynchosia difformis (Ell.) DC
TROY000033540 Barbour 01 Oct 2011 Dykes, Bailee
183		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012962 Macon 2 Jul 1976 Botts, Daniel A.
189		 AUA
Rhynchosia Difformis (Ell.) Dc.
TROY000004299 Pike 21 Aug 2000 Hall, James A.
138		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012955 Autauga 15 Jun 1982 Gunn, Scott C.
752		 AUA
Rhynchosia Difformis (Ell.) Dc.
TROY000039207 Dallas 01 Sep 2013 Diamond, Alvin R.
24493		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000004296 Dale 29 Aug 1997 Rundell, Hannelore
408		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000046550 Autauga 08 Jun 2017 Parker, Matthew R.
911		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UWAL0015969 Dallas 01 Sep 2013 Diamond, Alvin R.
24493		 UWAL
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000042633 Houston 04 Jun 2015 Diamond, Alvin R.
26419		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000031527 Fayette 14 Sep 1954 Moore, William H.
s.n.		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012959 Crenshaw 11 Oct 1998 Diamond, Alvin R.
11435		 AUA
Rhynchosia Difformis (Ell.) Dc.
UWAL0043595 Baldwin 05 Sep 2002 Larsen, Harry S.
1100		 UWAL
Rhyncosia difformis (Elliott) DC.
AUA000012961 Jackson 25 Aug 1981 Henderson, T.
472		 AUA
Rhynchosia Difformis (Ell.) Dc.
AUA000012958 Crenshaw 19 Aug 1996 Diamond, Alvin R.
10460		 AUA
Rhynchosia Difformis (Ell.) Dc.
UNA00027582 Talladega 22 Sep 1892 Mohr, Charles
s.n.		 UNA
Rhynchosia difformis (Ell.) DC.
UWAL0002061 Montgomery 11 Jun 2010 Diamond, Alvin R.
21397		 UWAL
Rhynchosia difformis (Ell.) DC.
TROY000005502 Montgomery 03 Jul 2001 Diamond, Alvin R.
12474		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
ALNHS00005022 Bullock 02 JUN 2017 Horne, Howard E.
HEH#16A		 ALNHS
Rhynchosia difformis (Ell.) de Candolle
TROY000005501 Butler 13 Jul 2007 Diamond, Alvin R.
17765		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012956 Autauga 14 Jun 1982 Gunn, Scott C.
708		 AUA
Rhynchosia Difformis (Ell.) Dc.
ALNHS00002405 Bibb 26 Jun 2013 Barger, T. Wayne
SP#1092		 ALNHS
Rhynchosia difformis (Ell.) DC.
UWAL0030855 Sumter 18 Jul 2015 Keener, Brian R.
9028		 UWAL
Rhynchosia difformis (Ell.) DC
TROY000019667 Crenshaw 19 Jun 2008 Diamond, Alvin R.
19441		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000036075 Bullock 24 May 2012 Dykes, Bailee
786		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012954 Autauga 7 Jun 1955 Moore, William H.
 AUA
Rhynchosia Difformis (Ell.) Dc.
TROY000031526 Autauga 07 Jun 1955 Moore, William H.
s.n.		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012964 Montgomery 10 Jul 1996 Diamond, Alvin R.
10399		 AUA
Rhynchosia Difformis (Ell.) Dc.
ALNHS00003282 Dallas 14 Jul 2015 Barger, T. Wayne
SP#1798		 ALNHS
Rhynchosia difformis (Ell.) DC.
UWAL0034665 Henry 30 Jun 1991 Kral, Robert
79307		 UWAL
Rhynchosia difformis (Ell.) DC
AUA000012957 Barbour 29 Jul 1970 Moore, Harold D.
441		 AUA
Rhynchosia Difformis (Ell.) Dc.
UWAL0046519 Autauga 08 Jun 2017 Parker, Matthew R.
911		 UWAL
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000019668 Pike 07 Oct 2007 Diamond, Alvin R.
18493		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000004297 Coffee 10 Aug 2000 Martin, Brian H.
873b		 TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UWAL0007028 Crenshaw 19 Jun 2008 Diamond, Alvin R.
19441		 UWAL
Rhynchosia difformis (Ell.) DC.
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