Rhynchosia difformis

Family:FABACEAE
Species:Rhynchosia difformis (Elliott) A.P. de Candolle
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) A.P. de Candolle - Double Form Snout Bean

Citation

Citation RHYNCHOSIA DIFFORMIS (Elliott) de Candolle, Prodr. 2: 384. 1825.
Basionym: Arcyphyllum difforme Elliott 1818; Glycine tomentosa Linnaeus, var. volubilis Michaux 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, 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: AUA, TROY, UNA, UWAL

Range of years during which specimens were collected: -

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
AUA000012956 Autauga 14 JUN 1982 GUNN, SCOTT C.
708
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
UWAL0015969 Dallas 01 Sep 2013 Diamond, Alvin R.
24493
UWAL
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012960 Fayette 14 SEP 1954 MOORE, WILLIAM H.
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
AUA000012958 Crenshaw 19 AUG 1996 DIAMOND, JR., ALVIN R.
10460
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
AUA000012959 Crenshaw 11 OCT 1998 DIAMOND, JR., ALVIN R.
11435
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
TROY000033540 Barbour 01 Oct 2011 Bailee Dykes
183
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UWAL0030898 Sumter 25 Jul 2014 Finzel, Brian
s.n.
UWAL
Rhynchosia difformis (Ell.) DC
TROY000031526 Autauga 07 Jun 1955 William H. Moore
s.n.
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UWAL0030855 Sumter 18 Jul 2015 Keener, Brian R.
9028
UWAL
Rhynchosia difformis (Ell.) DC
TROY000019668 Pike 07 Oct 2007 Alvin R. Diamond
18493
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000039207 Dallas 01 Sep 2013 Alvin R. Diamond
24493
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012962 Macon 2 JUL 1976 BOTTS, DANIEL A.
189
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
UWAL0043595 Baldwin 05 Sep 2002 Larsen, H.S.
1100
UWAL
Rhyncosia difformis (Elliott) DC.
TROY000004297 Coffee 10 Aug 2000 Brian H. Martin
873b
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UNA00008813 Autauga 14 Jun 1982 S. C. Gunn
708
UNA
Rhynchosia difformis (Ell.) DC.
TROY000004299 Pike 21 Aug 2000 James A. Hall
138
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000031527 Fayette 14 Sep 1954 William H. Moore
s.n.
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
UWAL0034665 Henry 30 Jun 1991 Kral, R.
79307
UWAL
Rhynchosia difformis (Ell.) DC
UNA00027582 Talladega 22 Sep 1892 Charles Mohr
s.n.
UNA
Rhynchosia difformis (Ell.) DC.
UWAL0014800 Bullock 24 May 2012 Dykes, Bailee
0786
UWAL
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012961 Jackson 25 AUG 1981 HENDERSON, T.
472
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
TROY000042633 Houston 04 Jun 2015 Alvin R. Diamond
26419
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UWAL0007028 Crenshaw 19 Jun 2008 Diamond, A.R.
19441
UWAL
Rhynchosia difformis (Ell.) DC.
UWAL0046519 Autauga 08 Jun 2017 Parker, Matthew R.
911
UWAL
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000036075 Bullock 24 May 2012 Bailee Dykes
786
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UWAL0002061 Montgomery 11 Jun 2010 Diamond, A.R.
21397
UWAL
Rhynchosia difformis (Ell.) DC.
TROY000005501 Butler 13 Jul 2007 Alvin R. Diamond
17765
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000019667 Crenshaw 19 Jun 2008 Alvin R. Diamond
19441
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000046550 Autauga 08 Jun 2017 Matthew R. Parker
911
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
UWAL0007027 Butler 21 Aug 2008 Diamond, A.R.
19805
UWAL
Rhynchosia difformis (Ell.) DC.
TROY000033317 Barbour 24 Sep 2011 Derek Morrison
110
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012957 Barbour 29 JUL 1970 MOORE, HAROLD D.
441
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
TROY000004296 Dale 29 Aug 1997 Hannelore Rundell
408
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012964 Montgomery 10 JUL 1996 DIAMOND, JR., ALVIN R.
10399
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
TROY000043530 Sumter 18 Jul 2015 Brian R. Keener
9028
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
AUA000012955 Autauga 15 JUN 1982 GUNN, SCOTT C.
752
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
AUA000012954 Autauga 7 JUN 1955 MOORE, WILLIAM H.
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
AUA000012963 Montgomery 20 JUN 1993 DIAMOND, JR., ALVIN R.
8684
AUA
RHYNCHOSIA DIFFORMIS (ELL.) DC.
TROY000005502 Montgomery 03 Jul 2001 Alvin R. Diamond
12474
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
TROY000004298 Butler 09 Sep 2000 Alvin R. Diamond
12123
TROY
Rhynchosia difformis (Elliott) A.P. de Candolle
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