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Useful Temperate Plants

Oxalis triangularis

A.St.-Hil.

Oxalidaceae

+ Synonyms

Acetosella catharinensis (N.E.Br.) Kuntze

Acetosella palustris (A.St.-Hil.) Kuntze

Oxalis catharinensis N.E.Br.

Oxalis corumbaensis Hoehne

Oxalis delta Vell.

Oxalis glaberrima Norlind

Oxalis oxyptera Progel

Oxalis palustris A.St.-Hil.

Oxalis papilionacea Hoffmanns. ex Zucc.

Oxalis regnellii Miq.

Oxalis tenuis R.Knuth

Oxalis tenuiscaposa R.Knuth

Oxalis venturiana R.Knuth

Oxalis vernalis Fredr. ex Norlind

Oxalis yapacaniensis (Kuntze) K.Schum.

Common Name:

Oxalis triangularis
Close-up of the flower
Photograph by: Ajna Fern
Creative Commons License
Oxalis triangularis Oxalis triangularis

General Information

Oxalis triangularis is a perennial plant growing about 20cm tall from a tuberous rootstock
The edible leaves and flowers are gathered from the wild and consumed locally. The plant is often grown as an ornamental.

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
Title
Encyclopaedia of Herbs and their Uses.
Publication
 
Author
Bown. D.
Publisher
Dorling Kindersley, London.
Year
1995
ISBN
0-7513-020-31
Description
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.
].

Botanical References


Range

S. America - Brazil

Habitat

Amongst rocks by streams at elevations of about 600 metres around Rio de Janeiro[
260
Title
Conservatory and Indoor Plants Volumes 1 & 2
Publication
 
Author
Phillips. R. & Rix. M.
Publisher
Pan Books, London.
Year
1998
ISBN
0-330-37376-5
Description
Excellent photos of over 1,100 species and cultivars with habits and cultivation details plus a few plant uses. Many species are too tender for outdoors in Britain though there are many that can be grown outside.
].

Properties

Edibility Rating *  *  *
HabitPerennial
Height0.20 m
PollinatorsInsects
Cultivation StatusWild

Cultivation Details

Oxalis triangularis is not very cold-hardy in the temperate zone, tolerating temperatures down to about -3°c[
260
Title
Conservatory and Indoor Plants Volumes 1 & 2
Publication
 
Author
Phillips. R. & Rix. M.
Publisher
Pan Books, London.
Year
1998
ISBN
0-330-37376-5
Description
Excellent photos of over 1,100 species and cultivars with habits and cultivation details plus a few plant uses. Many species are too tender for outdoors in Britain though there are many that can be grown outside.
]. The plant has survived outdoors on our Cornwall site (hardiness zone 8) for several years in a well-drained, moderately heavy soil and a sunny position[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]. It should be possible to grow the plant outdoors even in somewhat colder areas by digging up the roots in the autumn after the top growth has been cut down by frosts, storing them in a cool but frost-free place and replanting them in mid to late spring[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].
Easily grown in a sandy soil in a warm dry position in sun or light shade[
1
Title
RHS Dictionary of Plants plus Supplement. 1956
Publication
 
Author
F. Chittendon.
Publisher
Oxford University Press
Year
1951
ISBN
-
Description
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
,
200
Title
The New RHS Dictionary of Gardening. 1992.
Publication
 
Author
Huxley. A.
Publisher
MacMillan Press
Year
1992
ISBN
0-333-47494-5
Description
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Grows well in a dry shady corner[
260
Title
Conservatory and Indoor Plants Volumes 1 & 2
Publication
 
Author
Phillips. R. & Rix. M.
Publisher
Pan Books, London.
Year
1998
ISBN
0-330-37376-5
Description
Excellent photos of over 1,100 species and cultivars with habits and cultivation details plus a few plant uses. Many species are too tender for outdoors in Britain though there are many that can be grown outside.
].
There are two main forms of this plant, ssp triangularis has smaller, green leaves and is, in our experience, slightly the hardier of the two. Ssp papilionacea has larger, dark purple leaves and is considered the more ornamental[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].

Edible Uses

Leaves - raw or cooked[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]. A pleasant acid flavour[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]. Use in moderation, see notes at top of sheet,

Flowers - raw[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]. A pleasant and decorative addition to the salad bowl[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]. Most children really adore eating the flowers raw[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].

Root - raw or cooked. The root is up to 5cm long and 15mm wide, it is crisp and juicy with a pleasant sweet mild flavour[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].

Medicinal

None known

Other Uses

None known

Propagation

Seed - best sown as soon as it is ripe in a cold frame. The seed from one subspecies does not always come true - on at least one occasion we have had the purple-leaved form grow from seed of the green leaved form that had definitely not been cross-pollinated[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
]. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in a greenhouse for their first winter. Plant them out in late spring or early summer.
Division in spring. 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.
Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2019-09-16. <temperate.theferns.info/plant/Oxalis+triangularis>

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