The seeds are slightly poisonous to some mammals, but no cases involving people are known[13, 76]. Skin contact with the plant can cause dermatitis in some people[76].
Range
Throughout most of the world, including Britain, but absent from the Tropics.
Habitat
Roadsides and cultivated land[9], preferring rather sandy soils[7].
Edibility Rating
2 (1-5)
Medicinal Rating
2 (1-5)
Physical Characteristics
Annual growing to 0.1m by 0.4m.
It is hardy to zone 7 and is not frost tender. It is in flower from June to August, and the seeds ripen from July to September. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects.
The plant is self-fertile.
The plant prefers light (sandy), medium (loamy) and heavy (clay) soils.
The plant prefers acid, neutral and basic (alkaline) soils.
It cannot grow in the shade.
It requires dry or moist soil.
Leaves - raw or cooked[2, 105, 115]. Used in salads[4] and as a spinach[2]. The tender shoots are cooked as a vegetable[272]. It is best not to eat these leaves[55, 238], see the notes above on toxicity.
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.
The scarlet pimpernel was at one time highly regarded as a medicinal herb, especially in the treatment of epilepsy and mental problems[254], but there is little evidence to support its efficacy and it is no longer recommended for internal use because it contains toxic saponins and cytotoxic cucurbitacins[238, 254].
The whole herb is antitussive, cholagogue, diaphoretic, diuretic, expectorant, nervine, purgative, stimulant and vulnerary[4, 7, 9, 21, 46]. It can be taken internally or applied externally as a poultice[7]. An infusion is used in the treatment of dropsy, skin infections and disorders of the liver and gall bladder[9, 272]. The plant is best harvested in June and can be dried for later use[4]. Use with caution[21], large doses can cause polyuria and tremor[7].
A homeopathic remedy is made from the plant[9]. It is used internally to treat itchy skins and externally to remove warts[9].
The squeezed plant is used in Nepal for washing and bathing[272].
Cultivation details
Prefers a sunny position and a good soil[1]. Succeeds in dry or sandy soils[238].
The flowers open at about 8 am and close at 3pm each day, though they close earlier if it rains. The flowers are also said to foretell wet weather if they close early[207].
Propagation
Seed - sow spring in situ.
Links
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.
[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.
[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.
[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.
[46] Uphof. J. C. Th.Dictionary of Economic Plants. Weinheim 1959 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.
[55] Harris. B. C.Eat the Weeds. Pivot Health 1973 Interesting reading.
[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.
[105] Tanaka. T.Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing 1976 The most comprehensive guide to edible plants I've come across. Only the briefest entry for each species, though, and some of the entries are more than a little dubious. Not for the casual reader.
[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.
[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.
[207] Coffey. T.The History and Folklore of North American Wild Flowers. Facts on File. 1993 ISBN 0-8160-2624-6 A nice read, lots of information on plant uses.
[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.
[254] Chevallier. A.The Encyclopedia of Medicinal Plants Dorling Kindersley. London 1996 ISBN 9-780751-303148 An excellent guide to over 500 of the more well known medicinal herbs from around the world.
[272] Manandhar. N. P.Plants and People of Nepal Timber Press. Oregon. 2002 ISBN 0-88192-527-6 Excellent book, covering over 1,500 species of useful plants from Nepal together with information on the geography and peoples of Nepal. Good descriptions of the plants with terse notes on their uses.
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.
Weeds as a future source for human consumption
Martha Díaz B
Thu Jun 28 17:02:26 2001
We reciently recieved this article on the use of various weeds
in south america. We though that you might enjoy it.
Abstract
Weeds may constitute an additional food source for humans. Up to 66% of weed species are edible and
abound in urban and agricultural environments. A total of 43 species were sampled in tropical areas in
Coatepec Mexico (e.g. roadsides, urban vacant lots, streets, sugar cane and coffee plantations). A similar
survey performed in a temperate area in Bariloche Argentina with 32 species sampled. At a greater
geographic scale, a comparison between Mexican and Argentine weeds shows that, proportionately, the
food parts vary a little between regions. In general, the uses go from leaves, seeds, roots, fruits, and
flowers.
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