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Useful Temperate Plants

Brassica napus napus

L.

Brassicaceae


This species has been cultivated as a food crop for many hundreds of years and, in that time, several quite distinct forms have arisen. The nomenclature of these forms is confused, to say the least, and by no means universally accepted. We have followed the treatment used by GRIN, though it is very likely to be revised in the future[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].

+ Synonyms

Common Name: Oilseed Rape

No Image.

General Information

Oilseed rape is an erect to spreading, annual to biennial plant; branched above, it can grow from 30 - 150cm tall[
305
Title
Pacific Island Ecosystems at Risk
Publication
 
Author
 
Website
http://www.hear.org/pier/scientificnames/index.html
Publisher
 
Year
0
ISBN
 
Description
A very good website detailing weed species that have been introduced into the Pacific Islands.
].
Oilseed rape is one of the most cultivated plants in the world, widely grown from the temperate zone to the tropics for its oil-rich seeds which are used for food , biomass and industrial purposes.
A widely cultivated plant, it sometimes escapes from cultivation and becomes established - it has been described as invasive in countries such as New Zealand and the Galapagos Islands of Ecuador[
305
Title
Pacific Island Ecosystems at Risk
Publication
 
Author
 
Website
http://www.hear.org/pier/scientificnames/index.html
Publisher
 
Year
0
ISBN
 
Description
A very good website detailing weed species that have been introduced into the Pacific Islands.
].

Known Hazards

The oil contained in the seed of some varieties of this species can be rich in erucic acid which is used in industry but is toxic if consumed. However, modern cultivars have been selected for culinary use which are almost free of erucic acid[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].

Botanical References

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.

Range

Europe - Mediterranean. Naturalized in Britain[
17
Title
Flora of the British Isles.
Publication
 
Author
Clapham, Tutin and Warburg.
Publisher
Cambridge University Press
Year
1962
ISBN
-
Description
A very comprehensive flora, the standard reference book but it has no pictures.
].

Habitat

Banks of streams, ditches and arable fields in Britain[
17
Title
Flora of the British Isles.
Publication
 
Author
Clapham, Tutin and Warburg.
Publisher
Cambridge University Press
Year
1962
ISBN
-
Description
A very comprehensive flora, the standard reference book but it has no pictures.
].

Properties

Edibility Rating *  *  *
Medicinal Rating *  *
Other Uses Rating *  *  *  *
HabitAnnual/Biennial
Height1.20 m
PollinatorsBees, Self
Self-fertileYes
Cultivation StatusCultivated

Cultivation Details

Oilseed rape is a plant of the temperate zone, where it is found mainly at low elevations but also ascending up to 2,000 metres - it can also be cultivated at higher elevations from 1,500 - 2,200 metres in the tropics. It grows best in areas where annual daytime temperatures are within the range 15 - 25°c, but can tolerate 5 - 41°c[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. When dormant, the plant can survive temperatures down to about -15°c, but young growth can be severely damaged at -6°c[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. It prefers a mean annual rainfall in the range 500 - 1,000mm, but tolerates 400 - 2,800mm[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Succeeds in full sun in a well-drained fertile preferably alkaline soil[
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.
]. Succeeds in any reasonable soil[
52
Title
Salads all the Year Round.
Publication
 
Author
Larkcom. J.
Publisher
Hamlyn
Year
1980
ISBN
 
Description
A good and comprehensive guide to temperate salad plants, with full organic details of cultivation.
]. Prefers a heavy soil and cool moist conditions[
16
Title
New Vegetable Growers Handbook.
Publication
 
Author
Simons.
Publisher
Penguin
Year
1977
ISBN
0-14-046-050-0
Description
A good guide to growing vegetables in temperate areas, not entirely organic.
,
20
Title
Companion Planting for Successful Gardening.
Publication
 
Author
Riotte. L.
Publisher
Garden Way, Vermont, USA.
Year
1978
ISBN
0-88266-064-0
Description
Fairly good.
]. Sunny days and cool nights are favourable for plant growth whilst dry weather at harvest time is essential[
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
]. Prefers a pH in the range 6.5 - 7.6, tolerating 5.5 - 8[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
There are two main forms of oilseed rape and each form has many named varieties:-
Annual rape, or summer rape, (sometimes classified as Brassica napus annua (Schubl. & G. Martens) Thell.) is a spring-sown crop harvested in the summer. It can take from 85 - 160 days from sowing to harvesting the seed[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Winter rape, canola or colza (sometimes classified as Brassica napus napus) is generally sown in the autumn and harvested in early to late summer.It can take from 160 - 340 days from sowing to harvest[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Rapeseed oil is naturally high in erucic acid and glucosinolates, both of which have anti-nutritional properties but have industrial uses. Forms high in erucic acid have been developed for industrial use, whilst cultivars have also been developed that have a low content of erucic acid and glucosinolates and are therefore suitable for food.
Yields of 2 - 4 tonnes per hectare are considered good, while yields of 0.5 - 2 tonnes are more usual[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Rape is 70% self-pollinating and 30% cross-pollinated. Even if wind and insects are absent, seed are still produced. Yield increases with honeybees[
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
].
This species is closely related to Brassica rapa[
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.
].

Edible Uses

An edible oil is obtained from the seed, it is used mainly for cooking purposes, but also for salads[
4
Title
A Modern Herbal.
Publication
 
Author
Grieve.
Publisher
Penguin
Year
1984
ISBN
0-14-046-440-9
Description
Not so modern (1930's?) but lots of information, mainly temperate plants.
,
13
Title
Hamlyn Encyclopaedia of Plants.
Publication
 
Author
Triska. Dr.
Publisher
Hamlyn
Year
1975
ISBN
0-600-33545-3
Description
Very interesting reading, giving some details of plant uses and quite a lot of folk-lore.
,
34
Title
The Oxford Book of Food Plants.
Publication
 
Author
Harrison. S. Wallis. M. Masefield. G.
Publisher
Oxford University Press
Year
1975
ISBN
-
Description
Good drawings of some of the more common food plants from around the world. Not much information though.
,
46
Title
Dictionary of Economic Plants.
Publication
 
Author
Uphof. J. C. Th.
Publisher
Weinheim
Year
1959
ISBN
-
Description
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
183
Title
Cornucopia - A Source Book of Edible Plants.
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications
Year
1990
ISBN
0-9628087-0-9
Description
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.
]. Oil purchased for culinary use is perfectly safe and wholesome to use. However, do not press your own seeds for oil unless you are sure it is low in erucic acid - see the notes above on toxicity.

Leaves - raw or cooked[
4
Title
A Modern Herbal.
Publication
 
Author
Grieve.
Publisher
Penguin
Year
1984
ISBN
0-14-046-440-9
Description
Not so modern (1930's?) but lots of information, mainly temperate plants.
,
34
Title
The Oxford Book of Food Plants.
Publication
 
Author
Harrison. S. Wallis. M. Masefield. G.
Publisher
Oxford University Press
Year
1975
ISBN
-
Description
Good drawings of some of the more common food plants from around the world. Not much information though.
,
37
Title
The Gardener's Assistant.
Publication
 
Author
Thompson. B.
Publisher
Blackie and Son.
Year
1878
ISBN
-
Description
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.
]. Added to salads or used as a potherb[
183
Title
Cornucopia - A Source Book of Edible Plants.
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications
Year
1990
ISBN
0-9628087-0-9
Description
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.
].

Immature flowering stems - cooked in much the same way as broccoli[
183
Title
Cornucopia - A Source Book of Edible Plants.
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications
Year
1990
ISBN
0-9628087-0-9
Description
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.
].

The sprouted seed is often used as the mustard part of mustard and cress. Eaten in salads[
4
Title
A Modern Herbal.
Publication
 
Author
Grieve.
Publisher
Penguin
Year
1984
ISBN
0-14-046-440-9
Description
Not so modern (1930's?) but lots of information, mainly temperate plants.
,
34
Title
The Oxford Book of Food Plants.
Publication
 
Author
Harrison. S. Wallis. M. Masefield. G.
Publisher
Oxford University Press
Year
1975
ISBN
-
Description
Good drawings of some of the more common food plants from around the world. Not much information though.
,
37
Title
The Gardener's Assistant.
Publication
 
Author
Thompson. B.
Publisher
Blackie and Son.
Year
1878
ISBN
-
Description
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.
,
183
Title
Cornucopia - A Source Book of Edible Plants.
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications
Year
1990
ISBN
0-9628087-0-9
Description
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.
].
The seed is ground into a powder and used as a mustard flavouring[
183
Title
Cornucopia - A Source Book of Edible Plants.
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications
Year
1990
ISBN
0-9628087-0-9
Description
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.
].

Medicinal

The root is emollient and diuretic[
240
Title
Glossary of Indian Medicinal Plants (Including the Supplement).
Publication
 
Author
Chopra. R. N., Nayar. S. L. and Chopra. I. C.
Publisher
Council of Scientific and Industrial Research, New Delhi.
Year
1986
ISBN
-
Description
Very terse details of medicinal uses of plants with a wide range of references and details of research into the plants chemistry. Not for the casual reader.
]. The juice of the roots is used in the treatment of chronic coughs and bronchial catarrh[
240
Title
Glossary of Indian Medicinal Plants (Including the Supplement).
Publication
 
Author
Chopra. R. N., Nayar. S. L. and Chopra. I. C.
Publisher
Council of Scientific and Industrial Research, New Delhi.
Year
1986
ISBN
-
Description
Very terse details of medicinal uses of plants with a wide range of references and details of research into the plants chemistry. Not for the casual reader.
,
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
].

The seed, powdered, with salt is said to be a folk remedy for cancer[
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
].

Rape oil is used in massage and oil baths, it is believed to strengthen the skin and keep it cool and healthy. Combined with camphor it is applied as a remedy for rheumatism and stiff joints[
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
].

Agroforestry Uses:

The growth of this plant is inhibited by field mustard and hedge mustard growing nearby[
18
Title
Companion Plants.
Publication
 
Author
Philbrick H. and Gregg R. B.
Publisher
Watkins
Year
1979
ISBN
-
Description
Details of beneficial and antagonistic relationships between neighbouring plants.
,
20
Title
Companion Planting for Successful Gardening.
Publication
 
Author
Riotte. L.
Publisher
Garden Way, Vermont, USA.
Year
1978
ISBN
0-88266-064-0
Description
Fairly good.
].

Other Uses

The seed contains up to 45% of a semi-drying oil. Cultivars low in erucic acid are widely used for food, whilst other forms can be used as a luminant, lubricant, in soap making etc[
13
Title
Hamlyn Encyclopaedia of Plants.
Publication
 
Author
Triska. Dr.
Publisher
Hamlyn
Year
1975
ISBN
0-600-33545-3
Description
Very interesting reading, giving some details of plant uses and quite a lot of folk-lore.
,
21
Title
The Herb Book.
Publication
 
Author
Lust. J.
Publisher
Bantam books
Year
1983
ISBN
0-553-23827-2
Description
Lots of information tightly crammed into a fairly small book.
,
57
Title
Plants for Man.
Publication
 
Author
Schery. R. W.
Publisher
 
Year
 
ISBN
 
Description
Fairly readable but not very comprehensive. Deals with plants from around the world.
,
142
Title
Plants Consumed by Man.
Publication
 
Author
Brouk. B.
Publisher
Academic Press
Year
1975
ISBN
0-12-136450-x
Description
Readable but not very comprehensive.
].
Rapeseed oil has potential market in producing detergent lubrication oils, emulsifying agents, polyamide fibres, and resins, and as a vegetable wax substitute. According to the Chemical Marketing Reporter (April 26, 1982) 'the most common use for the oil is still in the production of erucic acid, a fatty acid used in turn in the manufacture of other chemicals[
269
Title
Handbook of Energy Crops
Publication
 
Author
Duke. J.
Publisher
-
Year
1983
ISBN
-
Description
Published only on the Internet, excellent information on a wide range of both temperate and tropical plants.
].
The oil can be used as a deisel substitute and is often cultivated for this purpose.

Propagation

Seed - sow spring or autumn in situ.
Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2018-08-19. <temperate.theferns.info/plant/Brassica+napus+napus>

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