Taxon: Stylosanthes biflora (L.) Britton et al.

Summary

Genus:

Stylosanthes

Family:

Fabaceae (alt. Leguminosae)

Subfamily:

Faboideae

Tribe:

Dalbergieae

Nomen number:

314721

Place of publication:

Prelim. cat. 13. 1888

Verified:

03/15/1989 ARS Systematic Botanists.

Accessions:

0 (0 active, 0 available) in National Plant Germplasm System.

Other conspecific taxa

Autonyms (not in current use), synonyms and invalid designations

Basionym
Trifolium biflorum L.

Autonym(s)
Stylosanthes biflora (L.) Britton et al. var. biflora

Heterotypic Synonym(s)
Stylosanthes biflora (L.) Britton et al. var. hispidissima (Michx.) Pollard & C. R. Ball
Stylosanthes floridana S. F. Blake
Stylosanthes riparia Kearney

Images (3 total. Click on image for more.)

Conservation Status

Reference(s)

Correll, D. S. & M. C. Johnston. 1970. Manual of the vascular plants of Texas
Deam, C. C. 1940. Flora of Indiana.
Gleason, H. A. & A. Cronquist. 1963. Manual of vascular plants of northeastern United States and adjacent Canada.
Gleason, H. A. & A. Cronquist. 1991. Manual of vascular plants of northeastern United States and adjacent Canada, ed. 2
Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
Magee, D. W. & H. E. Ahles. 1999. Flora of the Northeast. A manual of the vascular flora of New England and adjacent New York.
McGregor, R. L. et al. (The Great Plains Flora Association). 1977. Atlas of the Flora of the Great Plains.
McGregor, R. L. et al. (The Great Plains Flora Association). 1986. Flora of the Great Plains.
Mohlenbrock, R. H. & D. M. Ladd. 1978. Distribution of Illinois vascular plants
Mohlenbrock, R. H. 1957. A revision of the genus Stylosanthes. Ann. Missouri Bot. Gard. 44:327.
Radford, A. E. et al., eds. 1980-. Vascular flora of the southeastern United States.
Rhoads, A. F. & T. A. Block. 2000. The plants of Pennsylvannia. An illustrated manual
Stone, W. 1973. The plants of southern New Jersey
't Mannetje, L. 1984. Considerations on the taxonomy of the genus Stylosanthes. In: Stace, H. M. & L. A. Edye, eds., The biology and agronomy of Stylosanthes 7. Note: mentions
Turner, B. L. et al. 2003. Atlas of the vascular plants of Texas. Sida Botanical Miscellany no. 24
Wilbur, R. L. 1963. Leguminous plants of North Carolina.
Williams, R. J. et al. 1984. Natural distribution of Stylosanthes. In: Stace, H. M. & L. A. Edye, eds., The biology and agronomy of Stylosanthes 95.
Wunderlin, R. P. 1998. Guide to the vascular plants of Florida

Common names

Language	Name	Alternate name	note	seq	Citation
English	sidebeak pencil-flower			1	Wunderlin, R. P. 1998. Guide to the vascular plants of Florida
English	two-flower pencil-flower			1	Magee, D. W. & H. E. Ahles. 1999. Flora of the Northeast. A manual of the vascular flora of New England and adjacent New York.

Distribution

order_code	Status	Continent	Subcontinent	Country	State	Note	Reference
1	Native	Northern America	North-Central U.S.A.	United States	Illinois		Mohlenbrock, R. H. & D. M. Ladd. 1978. Distribution of Illinois vascular plants
1	Native	Northern America	North-Central U.S.A.	United States	Missouri	s.	Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	North-Central U.S.A.	United States	Oklahoma	e.	McGregor, R. L. et al. (The Great Plains Flora Association). 1977. Atlas of the Flora of the Great Plains.
1	Native	Northern America	Northeastern U.S.A.	United States	Indiana		Deam, C. C. 1940. Flora of Indiana.
1	Native	Northern America	Northeastern U.S.A.	United States	New Jersey		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Northeastern U.S.A.	United States	Ohio		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Northeastern U.S.A.	United States	Pennsylvania	s.	Rhoads, A. F. & T. A. Block. 2000. The plants of Pennsylvannia. An illustrated manual
1	Native	Northern America	Northeastern U.S.A.	United States	West Virginia		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	South-Central U.S.A.	United States	Texas	e. & n.-c.	Turner, B. L. et al. 2003. Atlas of the vascular plants of Texas. Sida Botanical Miscellany no. 24
1	Native	Northern America	Southeastern U.S.A.	United States	Alabama		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Arkansas		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Delaware		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Florida		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Georgia		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Kentucky		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Louisiana		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Maryland		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Mississippi		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	North Carolina		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	South Carolina		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Tennessee		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
1	Native	Northern America	Southeastern U.S.A.	United States	Virginia		Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)

Native
Northern America

NORTHEASTERN U.S.A.: United States [Indiana, New Jersey, Ohio, Pennsylvania (s.), West Virginia]
NORTH-CENTRAL U.S.A.: United States [Illinois, Missouri (s.), Oklahoma (e.)]
SOUTHEASTERN U.S.A.: United States [Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, Virginia]
SOUTH-CENTRAL U.S.A.: United States [Texas (e. & n.-c.)]

Reference(s)

Deam, C. C. 1940. Flora of Indiana.
Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii)
McGregor, R. L. et al. (The Great Plains Flora Association). 1977. Atlas of the Flora of the Great Plains.
Mohlenbrock, R. H. & D. M. Ladd. 1978. Distribution of Illinois vascular plants
Rhoads, A. F. & T. A. Block. 2000. The plants of Pennsylvannia. An illustrated manual
Turner, B. L. et al. 2003. Atlas of the vascular plants of Texas. Sida Botanical Miscellany no. 24

Cite as: USDA, Agricultural Research Service, National Plant Germplasm System. 2026. Germplasm Resources Information Network (GRIN Taxonomy). National Germplasm Resources Laboratory, Beltsville, Maryland.
URL: https://npgstest.ars-grin.gov/gringlobal/taxon/taxonomydetail?id=314721. Accessed 12 May 2026.