Strophostyles helvola

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Strophostyles helvola
Strophostyles helvola - Amberique Bean.jpg
Status TNC G5.svg
Secure  (NatureServe) [1]
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Genus: Strophostyles
Species:
S. helvola
Binomial name
Strophostyles helvola
(L.) Elliott
Synonyms
  • Cajanus helvulus(L.) Spreng., 1826
  • Dolichos helvolus(L.) Nutt., 1818
  • Glycine angulosaMuhl. ex Willd., 1802
  • Glycine helvola(L.) Elliott, 1818
  • Glycine peduncularisMuhl., 1813
  • Glycine peduncularis var. parabolicusMuhl. ex Barton, 1815
  • Phaseolus angulosusOrtega, 1860
  • Phaseolus diversifoliusPersoon, 1807
  • Phaseolus farinosusL., 1753
  • Phaseolus helvolusL., 1753
  • Phaseolus peduncularis(Muhl. ex Barton) W. Barton, 1818
  • Phaseolus peregrinusNissole, 1732
  • Phaseolus trilobusMichaux ex Rich., 1803
  • Phaseolus vexillatusWalter, 1788
  • Strophostyles angulosa(Muhl. ex Willd.) Elliott, 1823
  • Strophostyles angulosa(Muhl. ex Willd.) A. Gray var. missouriensis S. Watson, 1890
  • Strophostyles helvola var. missouriensis(S. Watson) Britton, 1897
  • Strophostyles missouriensis(S. Watson) Small, 1903
  • Strophostyles peduncularis(Muhl. ex Elliott) Elliott, 1823

Strophostyles helvola, commonly called amberique-bean, [2] annual sand bean, [3] or trailing fuzzybean [4] is a species of flowering plant in the legume family. It is native to eastern Canada and the eastern United States. [1]

Contents

Description

It is an annual to perennial herbaceous vine, up to 3 m long, with light pubescence on the stem, leaves, and pods. The trifoliate leaves are often divided into three lobes, in a fiddle-shape (panduriform). They possess unique pea-like pink-purple flowers (fading to cream-yellow), with a gradually curving keel petal (the keel petal is one of the most distinguishing characters among the species of the genus). The fruit of S. helvola is up to 10 cm long, containing shiny black seeds with hairy coats originating from the inner surface of the pods. [4] [5] This seed coating lends the seeds buoyancy in water, which is thought to have contributed to its dispersal along major aquatic routes. [5]

Strophostyles helvola is primarily diagnosed by its keel petal (prominent, thin, curving away from the banner at the distal end); long, cylindrical pods; and highly lobed leaves (though not always lobed, and Strophostyles umbellata may also show lobing). [5]

When the seed pods are mature, they burst open to release the seeds.

Taxonomy

In addition to the type, at least one infraspecific taxon has been recognized, S. helvola var. missouriensis (S. Watson) Britton, although there is little evidence for distinct varieties of this species. [5]

A widely used orthographic variant is Strophostyles helvula, although only the former is taxonomically accepted. [6] [7]

Agricultural relevance

Strophostyles helvola is a wild relative of the cultivated common bean ( Phaseolus vulgaris ), and could serve as an important model for understanding how herbaceous legumes adapt to different stressful environments. Specifically, S. helvola has coastal populations which show high salinity tolerance due to up-regulated genes. [8]

Distribution and habitat

It is native to eastern Canada and the eastern United States. [1] This bean grows in many habitat types, including disturbed areas, where it is a pioneer species, taking hold in areas where few other plants grow, and in several types of soil, especially sandy types, and it can grow in dry or moist conditions. [4] It can often be found in seaside dune habitat, where arbuscular mycorrhizae help it withstand saline conditions. [9]

Ethnobotany

This plant was used medicinally and as food by Native American peoples. The Houma people used it to treat typhoid and the Iroquois used it topically for poison ivy irritation and warts. The Choctaw people used the boiled, mashed roots for food. [10] [11] Discovery of large quantities of S. helvola seeds in archaeological sites also suggests a use similar to common bean at one time; though the seeds are smaller than cultivated bean, it is nutritionally similar and possesses the largest seeds and pods for the genus. [12] The pods have been used in the present day as a sauteed vegetable in South Central Mindanao, Philippines. [13]

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References

  1. 1 2 3 Strophostyles helvula. NatureServe.
  2. USDA, NRCS (n.d.). "Strophostyles helvola". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 4 December 2015.
  3. Weakley, Alan (2015). "Flora of the Southern and Mid-Atlantic States".
  4. 1 2 3 Strophostyles helvola. USDA NRCS Plant Guide.
  5. 1 2 3 4 Riley-Hulting, Erin T.; Delgado-Salinas, Alfonso; Lavin, Matt (2004). "Phylogenetic Systematics of Strophostyles (Fabaceae): A North American Temperate Genus within a Neotropical Diversification". Systematic Botany. 29 (3): 627–653. doi:10.1600/0363644041744464. JSTOR   25063997. S2CID   85774146.
  6. "Strophostyles helvola (L.) Elliott ITIS Report". Interagency Taxonomic Information System. Retrieved September 21, 2018.
  7. "Tropicos | Name - !Strophostyles helvola (L.) Elliott". www.tropicos.org. Retrieved 2018-09-22.
  8. Zhang, Hengyou; Zuelsdorf, Christine; Penneys, Darin; Fan, Shoujin; Kofsky, Janice; Song, Bao-Hua (2018-12-11). "Transcriptome profiling of a beach-adapted wild legume for dissecting novel mechanisms of salinity tolerance". Scientific Data. 5: 180290. Bibcode:2018NatSD...580290Z. doi:10.1038/sdata.2018.290. ISSN   2052-4463. PMC   6289113 . PMID   30531857.
  9. Tsang, A. and M. A. Maun. (1999). Mycorrhizal fungi increase salt tolerance of Strophostyles helvola in coastal foredunes. Plant Ecology 144 159-66.
  10. Strophostyles helvula. University of Michigan Ethnobotany.
  11. Freedman, Robert Louis (1976). "Native North American Food Preparation Techniques". Boletín Bibliográfico de Antropología Americana (1973-1979). Pan American Institute of Geography and History. 38 (47): 126. JSTOR   43996285., s.v. A Root Food (ahelo' sa) Choctaw
  12. "Strophostyles helvola (L.) Elliot | Laboratory Guide To Archaeological Plant Remains From Eastern North America". pages.wustl.edu. Retrieved 2018-09-22.
  13. Maghirang, Rodel G (2018). "Ethnobotanical studies of some plants commonly used as vegetables in selected provinces of the Philippines". Journal of Nature Studies. 17: 30–43.