Oxalis laxa

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]
  • Acetosella laxa
  • Xanthoxalis laxa

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.

Description

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]

Taxonomy

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]

Table of Synonyms
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 puberula Kuntze 1891 species = het.
Acetosella pygmaea Kuntze 1891 species = het.
Acetosella vinaquillo (Steud.) Kuntze 1891 species = het.
Oxalis adenocaulos Phil. 1893 species = het.
Oxalis alsinoides Walp. 1843 species = het.
Oxalis brevicaulis Steud. 1841 species = het., nom. nud.
Oxalis campanensis Lourteig 2000 species = het.
Oxalis chosicensis R.Knuth 1919 species = het.
Oxalis corniculata var. sericea R.Knuth 1919 variety = het.
Oxalis cumingii Herb. 1832 species = het.
Oxalis deflexa Poepp. ex Progel 1877 species = het.
Oxalis dichotomiflora Steud. 1856 species = het.
Oxalis geranioides R.Knuth 1919 species = het.
Oxalis laxa var. hispidissima Gay 1846 variety = het.
Oxalis laxa var. major R.Knuth 1930 variety = het.
Oxalis laxa var. minor Barnéoud 1845 variety = het.
Oxalis laxa var. rigida Barnéoud 1845 variety = het.
Oxalis laxa var. violacea R.Knuth 1930 variety = het.
Oxalis micrantha Bertero 1829 species = het.
Oxalis micrantha var. alsinoides (Walp.) R.Knuth 1930 variety = het.
Oxalis micrantha var. major R.Knuth 1930 variety = het.
Oxalis micrantha var. purpurea R.Knuth 1930 variety = het.
Oxalis micrantha var. setifera R.Knuth 1919 variety = het.
Oxalis platycaulis Steud. 1841 species = het.
Oxalis puberula Phil. 1865 species = het., nom. illeg.
Oxalis pubescens Bertero ex Steud. 1841 species = het., not validly publ.
Oxalis pygmaea Phil. 1857 species = het., nom. illeg.
Oxalis rigida (Barnéoud) Lourteig 1988 species = het.
Oxalis san-romani Phil. 1893 species = het.
Oxalis torcana Phil. 1893 species = het.
Oxalis vinaquillo Steud. 1856 species = het.
Xanthoxalis laxa (Hook. & Arn.) Holub 1973 species ≡ hom.
Xanthoxalis micrantha (Bertero) Holub 1973 species = het.
Notes: ≡ homotypic synonym ; = heterotypic synonym

Names

Oxalis laxa is known by the common names dwarf woodsorrel or dwarf wood-sorrel.[3][2]

Range

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]

References

Citations

Sources

Books
  • DiTomaso, Joseph M.; Healy, Evelyn A. (2007). Weeds of California and Other Western States. Vol. 2: Geraniaceae–Zygophyllaceae. Oakland, California: University of California Division of Agriculture and Natural Resources. ISBN 978-1-879906-69-3. OCLC 73364658. Retrieved 13 December 2025.
Web sources
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