Yellow Oxalis

Oxalis corniculata, the creeping woodsorrel, procumbent yellow sorrel or sleeping beauty, is a somewhat delicate-appearing, low-growing herbaceous plant in the family Oxalidaceae.

is a small creeping type of woodsorrel that tends to grow well in moist climates. It resembles the common yellow woodsorrel, Oxalis stricta.

 It has a narrow, creeping stem that easily takes root at the nodes. Its trifoliate leaves are subdivided into three rounded leaflets, resembling a clover. Some varieties have green leaves, while others, such as Oxalis corniculata var. atropurpurea, have purple leaves. There are inconspicuous stipules at the base of each petiole. The small, yellow flowers have either round-edged or sharp-ended petals. The flowers close when the plant is not within direct sunlight, hence the name "sleeping beauty". Some specimens can have a single flower while others can have over 20.

The fruit is a narrow, cylindrical capsule, long, and noteworthy for its explosive discharge of the contained seeds, long. Pollen is about 34 microns in diameter.

Taxonomy: Oxalis corniculata was given its scientific name by Carl Linnaeus in 1753. It is classified in the genus Oxalis and within the family Oxalidaceae. It has no accepted varieties, but has many among its synonyms.

Table of Synonyms	Name	Year	Rank	Notes
(L.) Kuntze}}	1891	species	≡ hom.
Kuntze}}	1891	variety	= het.
(M.Bieb.) Kuntze}}	1891	variety	= het.
(Schltdl.) Kuntze}}	1891	species	= het.
(Baker) Kuntze}}	1891	species	= het.
DC.}}	1824	variety	≡ hom.
R.Knuth}}	1940	species	= het.
E.Mey.}}	1843	species	= het., nom. nud.
A.Cunn.}}	1839	species	= het.
Planch.}}	1857	variety	= het.
(A.Cunn.) Hook.f.}}	1852	variety	= het.
R.Knuth}}	1930	variety	≡ hom.
Makino}}	1912	form	= het.
Roti Mich.}}	1978	variety	= het.
Blatt.}}	1931	variety	≡ hom.
(Blume) Backer}}	1911	variety	= het.
(Small) Wiegand}}	1925	variety	= het.
(Kunth) Zucc.}}	1823	variety	= het.
Arsène ex R.Knuth}}	1919	variety	= het.
Poir.}}	1816	variety	= het.
Lange}}	1878	variety	= het.
Lange ex Fiori}}	1907	form	= het., nom. illeg.
(Kunth) Zucc.}}	1823	variety	= het.
Griseb.}}	1859	variety	= het.
Batt.}}	1888	form	= het., nom. illeg.
(Parl.) Arcang.}}	1882	subspecies	= het.
Parl.}}	1873	variety	= het.
(Parl.) Fiori}}	1901	form	= het.
(A.Rich.) Roti Mich.}}	1978	variety	= het.
(Thunb.) Masam.}}	1934	subspecies	= het.
(Thunb.) Zucc.}}	1831	variety	= het.
Laing}}	1914	variety	= het.
Makino}}	1910	variety	= het., nom. illeg.
G.Nicholson}}	1886		= het.
Makino}}	1926	variety	= het.
(Makino) H.Hara}}	1954	form	= het.
(Masam.) Masam.}}	1938	form	= het.
Masam.}}	1938	variety	= het.
H.Lév.}}	1910	variety	= het.
(E.Fürst) H.Hirzel}}	1861	variety	= het.
(E.Fürst) R.Knuth}}	1930	form	= het.
R.Knuth}}	1919	variety	≡ hom., not validly publ.
(M.Bieb.) Hohen.}}	1837	variety	= het.
P.Fourn.}}	1937	variety	= het., nom. illeg.
(M.Bieb.) Fiori}}	1907	form	= het.
Wiegand}}	1925	variety	= het.
Blatt.}}	1930	species	= het.
Elliott}}	1821	species	= het.
Raf. ex DC.}}	1824	species	= het., not validly publ.
Urb.}}	1912	species	= het.
Schltdl.}}	1856	species	= het.
Willd. ex Steud.}}	1841	species	= het., not validly publ.
Macfad.}}	1837	species	= het.
Blume}}	1825	species	= het.
(Small) Fedde}}	1905	species	= het.
Noronha}}	1790	species	= het., nom. nud.
Kunth}}	1822	species	= het.
Steud.}}	1821	species	= het., not validly publ.
Pittier}}	1930	species	= het.
Bojer ex Progel}}	1877	species	= het., not validly publ.
Steud.}}	1821	species	= het., not validly publ.
Roxb. ex Wight & Arn.}}	1834	species	= het.
R.Knuth}}	1927	species	= het.
Kunth}}	1822	species	= het.
Stokes}}	1812	species	= het.
Salisb.}}	1794	species	= het., nom. illeg.
A.Rich.}}	1848	species	≡ hom.
Noronha}}	1790	species	= het., nom. nud.
Thunb.}}	1781	species	= het.
(Makino) Masam.}}	1930	variety	= het.
Masam.}}	1930	form	= het.
Sol. ex G.Forst.}}	1786	species	= het., nom. nud.
Baker}}	1883	species	= het.
R.Knuth}}	1927	species	= het.
(Masam.) Masam.}}	1940	species	= het.
A.Cunn.}}	1839	species	= het.
Montrouz.}}	1860	species	= het., nom. illeg.
R.Knuth}}	1927	species	= het.
E.Fürst}}	1858	species	= het.
J.T.Jansen}}	1947	species	= het.
A.Cunn.}}	1839	species	= het.
M.Bieb.}}	1808	species	= het.
(L.) Scop.}}	1771	species	≡ hom.
Lam.}}	1779	species	= het.
(L.) Small}}	1903	species	≡ hom.
(Planch.) Moldenke}}	1947	variety	= het.
(Planch.) Nakai}}	1952	form	= het.
(Makino) Nakai}}	1952	form	= het.
(Parl.) Nakai}}	1952	subspecies	= het.
(Parl.) Nakai}}	1952	form	= het.
(Thunb.) Tzvelev}}	1996	subspecies	= het.
(Thunb.) Nakai}}	1952	variety	= het.
(Urb.) Tzvelev ex Prob. & Sokolovsk.}}	1988	species	= het.
Small}}	1903	species	= het.
(Thunb.) Moldenke}}	1944	species	= het.
(R.Knuth) Holub}}	1973	species	= het.
Notes: ≡ homotypic synonym ; = heterotypic synonym

Distribution: This species probably comes from southeastern Asia. It was first described by Linnaeus in 1753 using specimens from Italy, and it seems to have been introduced to Italy from the east before 1500. It is now cosmopolitan in its distribution and is often regarded as a weed in gardens, agricultural fields, and lawns.

Chloroplast genome: The chloroplast genome sequence is 152,189 bp in size, and contains 131 genes. It includes a pair of 25,387 bp inverted repeats that separate a large 83,427 bp single copy region. The genome suggests that this plant is closely related to O. drummondii.

Uses: The leaves of this species are edible, and have a tangy taste like lemons. A drink can be made by infusing the leaves in hot water for about 10 minutes, sweetening, and then chilling. The entire plant is rich in vitamin C. Any woodsorrel is safe in low dosages, but if eaten in large quantities over a length of time can inhibit calcium absorption by the body.

Indigenous peoples of Taiwan frequently grow this plant (known roughly as p-r-səʔ) as a cure for snakebites and scabies.