| Oxalis laxa | |
|---|---|
 | |
| In Madera County, California | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Oxalidales |
| Family: | Oxalidaceae |
| Genus: | Oxalis |
| Species: | O. laxa |
| Binomial name | |
| Oxalis laxa | |
| Synonyms [1] | |
| |
Oxalis laxa, commonly called dwarf woodsorrel, is a species of flowering plant from South America in the wood-sorrel family. It is an introduced weed in California.
Dwarf woodsorrel is an annual plant with fibrous roots. Its stems grow upwards to as much as 20 centimeters. It has leaves growing both from the base of the plant and attached to its stems by leaf stems as much as 5 cm long. Its leaves are divided into leaflets that are sparely hairy and about 1.3 cm long. [2]
Its flowers have yellow, oblong petals less than 1.2 cm long. The fruit is an egg-shaped capsule to about 5 mm. [2]
Oxalis laxa was scientifically described and named by William Jackson Hooker and George Arnott Walker Arnott in 1830. It is classified in the genus Oxalis as part of the family Oxalidaceae. It has no accepted varieties, but has four in its 40 synonyms. [1]
| Name | Year | Rank | Notes |
|---|---|---|---|
| Acetosella alsinoides(Walp.) Kuntze | 1891 | species | = het. |
| Acetosella brevicaulis(Steud.) Kuntze | 1891 | species | = het., not validly publ. |
| Acetosella cumingii(Herb.) Kuntze | 1891 | species | = het. |
| Acetosella dichotomiflora(Steud.) Kuntze | 1891 | species | = het. |
| Acetosella laxa(Hook. & Arn.) Kuntze | 1891 | species | ≡ hom. |
| Acetosella micrantha(Bertero) Kuntze | 1891 | species | = het. |
| Acetosella platycaulis(Steud.) Kuntze | 1891 | species | = het. |
| Acetosella puberulaKuntze | 1891 | species | = het. |
| Acetosella pygmaeaKuntze | 1891 | species | = het. |
| Acetosella vinaquillo(Steud.) Kuntze | 1891 | species | = het. |
| Oxalis adenocaulosPhil. | 1893 | species | = het. |
| Oxalis alsinoidesWalp. | 1843 | species | = het. |
| Oxalis brevicaulisSteud. | 1841 | species | = het., nom. nud. |
| Oxalis campanensisLourteig | 2000 | species | = het. |
| Oxalis chosicensisR.Knuth | 1919 | species | = het. |
| Oxalis corniculata var. sericeaR.Knuth | 1919 | variety | = het. |
| Oxalis cumingiiHerb. | 1832 | species | = het. |
| Oxalis deflexaPoepp. ex Progel | 1877 | species | = het. |
| Oxalis dichotomifloraSteud. | 1856 | species | = het. |
| Oxalis geranioidesR.Knuth | 1919 | species | = het. |
| Oxalis laxa var. hispidissimaGay | 1846 | variety | = het. |
| Oxalis laxa var. majorR.Knuth | 1930 | variety | = het. |
| Oxalis laxa var. minorBarnéoud | 1845 | variety | = het. |
| Oxalis laxa var. rigidaBarnéoud | 1845 | variety | = het. |
| Oxalis laxa var. violaceaR.Knuth | 1930 | variety | = het. |
| Oxalis micranthaBertero | 1829 | species | = het. |
| Oxalis micrantha var. alsinoides(Walp.) R.Knuth | 1930 | variety | = het. |
| Oxalis micrantha var. majorR.Knuth | 1930 | variety | = het. |
| Oxalis micrantha var. purpureaR.Knuth | 1930 | variety | = het. |
| Oxalis micrantha var. setiferaR.Knuth | 1919 | variety | = het. |
| Oxalis platycaulisSteud. | 1841 | species | = het. |
| Oxalis puberulaPhil. | 1865 | species | = het., nom. illeg. |
| Oxalis pubescensBertero ex Steud. | 1841 | species | = het., not validly publ. |
| Oxalis pygmaeaPhil. | 1857 | species | = het., nom. illeg. |
| Oxalis rigida(Barnéoud) Lourteig | 1988 | species | = het. |
| Oxalis san-romaniPhil. | 1893 | species | = het. |
| Oxalis torcanaPhil. | 1893 | species | = het. |
| Oxalis vinaquilloSteud. | 1856 | species | = het. |
| Xanthoxalis laxa(Hook. & Arn.) Holub | 1973 | species | ≡ hom. |
| Xanthoxalis micrantha(Bertero) Holub | 1973 | species | = het. |
| Notes: ≡ homotypic synonym ; = heterotypic synonym | |||
Oxalis laxa is known by the common names dwarf woodsorrel or dwarf wood-sorrel. [3] [2]
Dwarf woodsorrel is native to Argentina, Chile, Peru, and the Juan Fernández Islands. It also is introduced in Ecuador. [1] In North America it is an introduced weed in California and has been seen along the North Coast and the Sierra Nevada foothills at elevations of as much as 1,000 meters (3,300 ft). [3]
