Sphaerophysa salsula

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Sphaerophysa salsula
Sphaerophysasalsula2.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Genus: Sphaerophysa
Species:
S. salsula
Binomial name
Sphaerophysa salsula

Sphaerophysa salsula is a species of flowering plant in the legume family known by the common names alkali swainsonpea, [1] Austrian peaweed, and red bladder-vetch. It is native to Asia but it is known in many other parts of the world as an introduced species and often a noxious weed. It grows in cultivated land and disturbed habitat, easily tolerating alkaline substrates. It is commonly seen in areas where alfalfa is grown, because the seeds of the two species look similar and the weed seed is easily imported with the crop seed. [2]

This is a long-lived perennial herb growing up to 1.5 meters tall. It reproduces via seed as well as by sprouting vigorously from its creeping root system. The stems are coated in short white hairs. The leaves are made up of many oval leaflets each up to two centimeters long. The inflorescence is a raceme of several pea-like flowers each just over a centimeter wide. They may be brick-red to deep pink to brownish or red-orange in color. The fruit is a legume pod up to 3.5 centimeters long. It is inflated and bladderlike, hairless, translucent, shiny, and papery when dry. It is mottled greenish or reddish. It contains several seeds each about two millimeters long.

Like other legumes, this plant contains endophytes. These include the bacterium Paracoccus sphaerophysae , which was recently isolated from the roots of this species, and named for it. [3] Other rhizobia in this species include Shinella kummerowiae and species of the genera Rhizobium , Agrobacterium , and Mesorhizobium . [4]

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References

  1. "Sphaerophysa salsula". Natural Resources Conservation Service PLANTS Database. USDA . Retrieved 25 November 2015.
  2. CDFA EncycloWeedia
  3. Deng, Z., et al. (2010). Paracoccus sphaerophysae sp. nov., a siderophore-producing, endophytic bacterium isolated from root nodules of a Sphaerophysa salsula growing in northwestern China. Int J Syst Evol Microbiol.
  4. Xu, L., et al. (2008). Genetic diversity in rhizobia isolated from Sphaerophysa salsula in several regions of northwestern China. Acta Entomologica Sinica 51:5 1017-98.