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Brassica juncea napiformis

Common name:	Root Mustard	Family:	Cruciferae
Author:	(Pailleux.&Boiss.)Kitam.	Botanical references:
Synonyms:
Known Hazards:	None known
Range:	A cultivar of garden origin.
Habitat:	Not known in the wild.
Edibility Rating (1-5):	4	Medicinal Rating (1-5):	2

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	B. juncea var. megarrhiza[G] B. juncea var. napiformis[G] B. napiformis[G] Sinapis juncea var. napiformis[G]
Epithets:	From a Dictionary of Botanical Epithets
	juncea = rush like;
Systematics:	From a USDA Plants Database
	Order: Capparales. Renamed to Brassicaceae -- Mustard family

Physical Characteristics

Annual growing to 0.75m. It is hardy to zone 7 and is not frost tender. It is in flower from June to August, and the seeds ripen from August to September. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees. The plant is self-fertile. We rate it 4/5 for edibility and 2/5 for medicinal use.

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

Habitats and Possible Locations

Cultivated Beds.

Edible Uses

Condiment; Flowers; Leaves; Oil; Root.

Leaves - raw or cooked[206]. A peppery flavour that can range from mild to hot, they make a good cooked vegetable[206]. The leaves can also be finely shredded and added to mixed salads[206]. The protein extracted from the leaves mixes well with banana pulp and is well adapted as a pie filling[183].
Flowers and young flowering stems - raw or cooked[52]. Sweet and succulent[133].
An edible semi-drying oil is obtained from the seed[1, 2, 17, 57, 183]. The seed contains 25 - 30% oil[74].
The seed is used as a mustard flavouring[171]. It is the source of 'brown mustard'[183], a prepared mustard that is milder than that produced from other species[238]. Pungency of mustard develops when cold water is added to the ground-up seed - an enzyme (myrosin) acts on a glycoside (sinigrin) to produce a sulphur compound. The reaction takes 10 - 15 minutes. Mixing with hot water or vinegar, or adding salt, inhibits the enzyme and produces a mild bitter mustard[238]. Black mustard comes from B. nigra and white mustard from Sinapis alba.
The seed is also used whole in curries and pickles[238]. They are often heated in oil to destroy their pungency and give them a nutty flavour[238].
Sprouted seeds can be added to salads.
Root - raw or cooked[183]. Usually sliced and made into pickles[206].

Medicinal Uses

Disclaimer

Anodyne; Aperient; Diuretic; Emetic; Galactogogue; Rubefacient; Stimulant.

Reported to be anodyne, aperitif, diuretic, emetic, rubefacient, and stimulant, the plant is a folk remedy for arthritis, foot ache, lumbago, and rheumatism[269].
The seed is used in the treatment of tumours in China[269]. In Korea, the seeds are used in the treatment of abscesses, colds, lumbago, rheumatism, and stomach disorders[269].
The root is used as a galactagogue in Africa[269].
Ingestion may impart a body odour repellent to mosquitoes[269].
Mustard oil is used in the treatment of skin eruptions and ulcers[269]. Believed to be aperient and tonic, the volatile oil is used as a counterirritant and stimulant[269].
In Java the plant is used as an antisyphilitic emmenagogue[269].
Leaves applied to the forehead are said to relieve headache[269].
The Chinese eat the leaves in soups for bladder, inflammation or haemorrhage[269].

Other Uses

Green manure; Repellent.

There is some evidence that if this plant is grown as a green manure it is effective in reducing soil-borne root rots in pea crops[206]. This is attributed to chemicals that are given off as the plants decay[206].

Cultivation details

Succeeds in full sun in most well-drained moisture-retentive fertile soils[16, 200, 206]. Prefers a heavy soil and some shade[16]. Dislikes very hot weather[33]. Plants tolerate high rainfall and, although fairly deep rooted, are not very drought resistant[206].
A form of B. juncea that has been selected in the Orient for its edible root[206]. It is fairly hardy, surviving temperatures down to at least -4°c[206].
Plants have a rooting depth of between 90 - 120 cm[269].
A good bee plant[74].

Propagation

Seed - sow in situ from June to October. Spring-sown crops tend to run quickly to seed, though they can be eaten whilst still small[206]. It is best not to sow the seed in very hot weather[206].
There are about 5,660 - 6,000 per 0.01 kg (1/3 oz)[269].

Cultivars

'': No entries have been made for this species as yet.

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

Web References

References for Brassica juncea var. napiformis (a possible synonym).

[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).

[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.

[16] Simons. New Vegetable Growers Handbook. Penguin 1977 ISBN 0-14-046-050-0
A good guide to growing vegetables in temperate areas, not entirely organic.

[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.

[33] Organ. J. Rare Vegetables for Garden and Table. Faber 1960
Unusual vegetables that can be grown outdoors in Britain. A good guide.

[52] Larkcom. J. Salads all the Year Round. Hamlyn 1980
A good and comprehensive guide to temperate salad plants, with full organic details of cultivation.

[57] Schery. R. W. Plants for Man.
Fairly readable but not very comprehensive. Deals with plants from around the world.

[74] Komarov. V. L. Flora of the USSR. Israel Program for Scientific Translation 1968
An immense (25 or more large volumes) and not yet completed translation of the Russian flora. Full of information on plant uses and habitats but heavy going for casual readers.

[133] Rice. G. (Editor) Growing from Seed. Volume 1. Thompson and Morgan. 1987
Very readable magazine with lots of information on propagation.

[171] Hill. A. F. Economic Botany. The Maple Press 1952
Not very comprehensive, but it is quite readable and goes into some a bit of detail about the plants it does cover.

[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.

[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.

[206] Larkcom J. Oriental Vegetables John Murray 1991 ISBN 0-7195-4781-4
Well written and very informative.

[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.

[269] Duke. J. Handbook of Energy Crops - 1983
Published only on the Internet, excellent information on a wide range of plants.

Readers Comments

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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
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