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Oxalis acetosella - L.

Wood Sorrel

Author	L.	Botanical references	17, 200
Family	Oxalidaceae	Genus	Oxalis
Synonyms
Known Hazards	The leaves contain oxalic acid, which gives them their sharp flavour. Perfectly all right in small quantities, the leaves should not be eaten in large amounts since oxalic acid can bind up the body's supply of calcium leading to nutritional deficiency. The quantity of oxalic acid will be reduced if the leaves are cooked. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition[238].
Range	Europe, including Britain, from Iceland south and east to Spain, N. and C. Asia to Japan.
Habitat	Moist woods, moorland and on shady rocks[187].
Edibility Rating	3 (1-5)	Medicinal Rating	2 (1-5)

Physical Characteristics

Perennial growing to 0.08m by 0.3m at a fast rate.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils. The plant prefers acid, neutral and basic (alkaline) soils. It can grow in full shade (deep woodland) semi-shade (light woodland) or no shade. It requires moist soil.

Habitats

Woodland Garden; Sunny Edge; Dappled Shade; Shady Edge; Deep Shade; Ground Cover;

Edible Uses

Edible Parts: Flowers; Leaves.

Edible Uses: Curdling agent.

Leaves - raw or cooked[2, 7, 12, 37]. A delicious lemony flavour, the leaves make a refreshing, thirst-quenching munch and are also added to salads, soups, sauces etc[183]. This leaf should be used in moderation[4, 5, 9, 76], see the notes above on toxicity. Flowers - raw. A decorative addition to salads[K]. The dried plant can be used as a curdling agent for plant milks[66].

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Anodyne; Antiscorbutic; Astringent; Diuretic; Emmenagogue; Expectorant; Febrifuge; Irritant; Stomachic.

The fresh or dried leaves are anodyne, antiscorbutic, astringent, diuretic, emmenagogue, expectorant, febrifuge, irritant and stomachic[4, 7, 9, 21]. A decoction is used in the treatment of fevers, both to quench the thirst and allay the fever[4]. Externally, the leaves are crushed and applied locally to dispel boils and abscesses, they also have an astringent affect on wounds[7]. When used internally, some caution is advised due to the oxalic acid content of the leaves[4], the plant is contra-indicated for people suffering from gastritis or a calculus condition[7].

Other Uses

Cleanser; Ground cover.

The juice of the leaves removes iron mould stains from linen[6, 66, 115]. Plants can be grown as a ground cover in woodland or under the shade of shrubs[208]. They should be spaced about 45cm apart each way[208].

Cultivation details

Prefers moist shady conditions and a humus rich soil in shade or dappled sunlight[4, 9, 13, 27, 37, 200]. Dislikes very heavy and wet soils[17]. Plants are hardy to about -25°c[187]. A dainty woodland carpeter growing well in a woodland or wild garden[28, 200]. When well sited the plants can run aggressively and also self-sow[208]. The plant flowers in early spring, but does not produce much fertile seed at this time. Most of the fertile seed is produced from cleistogamous flowers during the summer[17].

Propagation

Seed - best sown as soon as it is ripe in a cold frame. Prick out the seedlings into individual pots when they are large enough to handle and plant them out in late spring or early summer. Division in spring. Very easy, larger divisions can be planted out direct into their permanent positions. We have found that it is better to pot up the smaller divisions and grow them on in light shade in a cold frame until they are well established before planting them out in late spring or early summer.

Links

This plant is also mentioned in the following PFAF articles: Plants for Problem Places - North Facing Walls and Deep Shade, The Woodland Edge Garden.

References

[K] Ken Fern
Notes from observations, tasting etc at Plants For A Future and on field trips.

[2] Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications 1972 ISBN 0-486-20459-6
Lots of entries, quite a lot of information in most entries and references.

[4] Grieve. A Modern Herbal. Penguin 1984 ISBN 0-14-046-440-9
Not so modern (1930's?) but lots of information, mainly temperate plants.

[5] Mabey. R. Food for Free. Collins 1974 ISBN 0-00-219060-5
Edible wild plants found in Britain. Fairly comprehensive, very few pictures and rather optimistic on the desirability of some of the plants.

[6] Mabey. R. Plants with a Purpose. Fontana 1979 ISBN 0-00-635555-2
Details on some of the useful wild plants of Britain. Poor on pictures but otherwise very good.

[7] Chiej. R. Encyclopaedia of Medicinal Plants. MacDonald 1984 ISBN 0-356-10541-5
Covers plants growing in Europe. Also gives other interesting information on the plants. Good photographs.

[9] Launert. E. Edible and Medicinal Plants. Hamlyn 1981 ISBN 0-600-37216-2
Covers plants in Europe. a drawing of each plant, quite a bit of interesting information.

[12] Loewenfeld. C. and Back. P. Britain's Wild Larder. David and Charles 0 ISBN 0-7153-7971-2
A handy pocket guide.

[13] Triska. Dr. Hamlyn Encyclopaedia of Plants. Hamlyn 1975 ISBN 0-600-33545-3
Very interesting reading, giving some details of plant uses and quite a lot of folk-lore.

[17] Clapham, Tootin and Warburg. Flora of the British Isles. Cambridge University Press 1962
A very comprehensive flora, the standard reference book but it has no pictures.

[21] Lust. J. The Herb Book. Bantam books 1983 ISBN 0-553-23827-2
Lots of information tightly crammed into a fairly small book.

[27] Vilmorin. A. The Vegetable Garden. Ten Speed Press 0 ISBN 0-89815-041-8
A reprint of a nineteenth century classic, giving details of vegetable varieties. Not really that informative though.

[28] Knight. F. P. Plants for Shade. Royal Horticultural Society. 1980 ISBN 0-900629-78-9
A small but informative booklet listing plants that can be grown in shady positions with a few cultivation details.

[37] Thompson. B. The Gardener's Assistant. Blackie and Son. 1878
Excellent general but extensive guide to gardening practices in the 19th century. A very good section on fruits and vegetables with many little known species.

[66] Freethy. R. From Agar to Zenery. The Crowood Press 1985 ISBN 0-946284-51-2
Very readable, giving details on plant uses based on the authors own experiences.

[76] Cooper. M. and Johnson. A. Poisonous Plants in Britain and their Effects on Animals and Man. HMSO 1984 ISBN 0112425291
Concentrates mainly on the effects of poisonous plants to livestock.

[115] Johnson. C. P. The Useful Plants of Great Britain. 0
Written about a hundred years ago, but still a very good guide to the useful plants of Britain.

[183] Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990 ISBN 0-9628087-0-9
Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.

[187] Phillips. R. & Rix. M. Perennials Volumes 1 and 2. Pan Books 1991 ISBN 0-330-30936-9
Photographs of over 3,000 species and cultivars of ornamental plants together with brief cultivation notes, details of habitat etc.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

[208] Thomas. G. S. Plants for Ground Cover J. M. Dent & Sons 1990 ISBN 0-460-12609-1
An excellent detailled book on the subject, very comprehensive.

[238] Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. 1995 ISBN 0-7513-020-31
A very well presented and informative book on herbs from around the globe. Plenty in it for both the casual reader and the serious student. Just one main quibble is the silly way of having two separate entries for each plant.

Readers Comments

Plants for a Future does not verify the accuracy of reader comments, use at your own risk. In particular Plants For A Future can not take any responsibility for any adverse effects from the use of plants. You should always consult a professional before using plants medicinally.

Plant Rennet

Rich Sat Apr 15 16:59:27 2000

According to VegSoc, in the past, fig leaves, melon, wild thistle and safflower have all supplied plant rennets for cheese making.

agsieve also has information about another plant source, using the juice from the plant as a coagulant.

Oxalis acetosella

Carol Wilson Fri Sep 11 2009

Oxalis corniculata I own a small house in Croatia with a small garden. In the hot weather the only little plants that seem to survive are oxalis corniculata. Do you know how/where I could obtain seeds for this plant so that I could use it as ground cover?

Oxalis acetosella

david Sat Sep 12 2009

www.b-and-t-world-seeds.com/ - supply tubers of this plant, I don't know if they will ship to Croatia

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