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Drawing from Prof. Dr.
Otto Wilhelm Thomé Flora von Deutschland Österreich und der Schweiz.
1885, Gera, Germany |
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Botanical name: Tamus communis (LINN.)
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Family: N.O. Dioscoreaceae (Yam family)
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Synonym: Blackeye Root
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Part Used: Root
- Variations: Dioscorea trifida
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Common Names:
Al Karam Al Barri [E], Black Bryony [E,H], Blackeye Root [H], Bryony,
Black [E], Lady'S Seal [E], Nueza Negra [E], Siyah Akasma [E], Herbe à
la Femme Battue
- Other Common names:
Cush-cush yam; Aja; Yampi; Mapuey; Cush-cush; Yampee
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Range: Britain; Egypt; Europe; Iraq; Spain; Turkey
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Habitat: Hedgerows, scrub, woodland edges and copses, avoiding
acid soils[1, 9]
Black Bryony belongs to a family of twining
and climbing plants which generally spring from large tubers, some of
which are cultivated for food, as the Yam, which forms an important
article of food in many tropical countries. Great Britain only furnishes
one species of this tribe,
Tamus communis, which, from its powerful, acrid and cathartic
qualities, ranks as a dangerous irritant poison.
It is a very common plant in woods and
hedges, with weak stems twining round anything within reach, and thus
ascending or creeping among the trees and bushes to a considerable
distance. The plant has been confused with the white bryony -
Bryonia cretica
L. ssp dioica Tutin (syn. Bryonia dioica Jacq.) in the
family Cucurbitaceae, from which it may be distinguished readily by its
lack of tendrils.
Description
Perennial Climber growing to 3.5 m. at a
medium rate. It is hardy to zone 5.
The leaves are heart-shaped pointed, smooth
and generally shining as if they had been varnished. Late in autumn they
turn dark purple or bright yellow, making a very showy appearance. In
winter, the stems die down, though the root is perennial.
The flowers are small, greenish-white, in
loose bunches and of two kinds, barren and fertile on different plants,
the latter being succeeded by berries of a red colour when ripe. It is
in flower from May to July, and the seeds ripen from September to
November. The flowers are dioecious (individual flowers are either male
or female, but only one sex is to be found on any one plant so both male
and female plants must be grown if seed is required) and are pollinated
by bees and flies. The plant not is self-fertile.
The plant prefers light (sandy), medium
(loamy) and heavy (clay) soils, requires well-drained soil and can grow
in heavy clay 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. The plant can tolerates strong winds but not
maritime exposure.
The large, fleshy root is nearly
cylindrical, 1 to 1 1/2 inch in diameter, 3 to 4 inches long or more,
black on the outside and exceedingly acrid. Although an old cathartic
medicine, is a most dangerous remedy when taken internally. It is like
that of the yam, thick and tuberous and abounding in starch, but too
acrid to be used as food in any manner.
The young shoots are said to be good eating
when dressed like Asparagus, the Moors eat them boiled with oil and
salt, after they have been first soaked in hot water.
Black bryony (alternative plants?)
Dioscorea communis
(sometimes placed in the segregate genus Tamus) is a species of
flowering plant in the yam family
Dioscoreaceae and is commonly known as black bryony,
lady's-seal, and black bindweed. Black Bryony is
highly poisonous and should not be ingested at all at least when raw. When cooked, young shoots are commonly
eaten in southern France, Spain, Portugal, Italy (bruscandoli) and Croatia.
The generic name Tamus is given to
the plant from the belief that it is the same as that referred to in the
works of
Pliny under the
name of Uva Taminia. The Greeks use the young suckers like
Asparagus, which they much resemble, as also do Istrians. A variation, T.
cretica is a native of Greece and the Greek Archipelago.
Cultivation and Propogation
Requires a moist well-drained fertile soil
[17].
A climbing plant, the weak stems support
themselves by twining around other plants and are capable of growing
quite high up into shrubs and trees [4].
Dioecious. Male and female plants must be
grown if seed is required.
Seed - sow in a cold frame in early spring
or as soon as the seed is ripe in the autumn. Prick out the seedlings
into individual pots once they are large enough to handle, and plant out
in the summer or in late spring of the following year.
Edible Uses
- Leaves.
- Young shoots - cooked. A decidedly bitter flavour. An asparagus
substitute, it is best if the water is changed once whilst cooking.
Possible toxic.
Medicinal Action and Uses
- Antiecchymotic; Cathartic; Diuretic;
Emetic; Haemolytic; Poultice; Rubefacient.
The berries act as an emetic, and children
should be cautioned against eating them. The fresb root/rhizome is
antiecchymotic, diuretic, emetic, haemolytic and rubefacient.
A tincture made from the root proves
a most useful application to unbroken chilblains, and also the fruits,
steeped in gin, are used for the same remedy.
Black Bryony is a popular remedy for
removing discoloration caused by bruises and black eyes, etc. The fresh
root is scraped to a pulp and applied in the form of a poultice. When
scraped or squeezed, it yields a colourless mucilaginous sap which has
been used as a rubefacient (or stimulating plaster) and counter-irritant
application in gout, lumbago, rheumatism, and similar disorders (Maheu &
Chartier 1927, Wren 1975, Perrot & Paris 1971). The popular names
blackeye root and herbe à la femme battue
refer to the use of the rhizome as an application to bruises to remove the
discolouration (Maheu & Chartier 1927, North 1967). Old writers
recommend it being made into an ointment with 'hog's grease or wax, or
other convenient ointment.
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Histamin:
Summenformel: C5H9N3
Molmasse: 111,1 g/mol
LD50 (Maus): 2000 mg/kg (s.c.) |
The plant is rich in saponins so must be
used with caution. It has a very powerful cathartic affect and ranks as
a dangerous irritant poison. It is not normally used internally, but the
macerated root is applied externally as a poultice to bruises, rheumatic
joints etc. This should not be done without expert advice since it can
cause painful blisters. The root is used fresh or can be harvested in
the autumn and dried for later use.
The expressed juice of the fresh root,
mixed with a little white wine, has been used as a remedy for gravel,
being a powerful diuretic, but it is not given internally now, and is
not included in the British Pharmacopoeia. Death in most painful form is
the result of an overdose, while the effect of a small quantity, varying
not with the age only, but according to the idiosyncrasies of the
patient, leaves little room for determining the limit between safety and
destruction. The expressed juice of the root, with honey, has also been
used as a remedy for asthmatic complaints, but other remedies that are
safer should be preferred.
Both the rubefacient slime from the rhizome
and the juice from the berry contain calcium oxalate raphides -
measuring an average 450 μm in length and 11 μm in diameter in the berry
juice, and an average 250 μm in length and 8 μm in diameter in the slime
from the rhizome - which are sharply pointed at both ends. They are
responsible for mechanical irritation when rubbed into the skin. In
addition, the rhizome contains histamine and saponins, both of which may
contribute to the observed skin response following subcutaneous
injection by the calcium oxalate raphides (Schmidt & Moult 1983). The
irritant effects on the skin may be inhibited by an antihistamine
(Holzach & Flück 1951).
Cases of an allergic contact dermatitis
from black bryony have been described by Milyavsky (1979) and Fernandez
de Corres (1983).
The rhizome and particularly the attractive
scarlet berries can cause poisoning when ingested. The symptoms are
those of an irritant purgative with burning of the mouth and blistering
of the skin (North 1967, Lewis & Elvin-Lewis 1977).
Sources:
- http://www.botanical.com/botanical/mgmh/b/brybla75.html
- http://www.giftpflanzen.com/tamus_communis.html (German)
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http://caliban.mpiz-koeln.mpg.de/~stueber/thome/band1/tafel_135.html
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http://image.fs.uidaho.edu/vide/descr792.htm
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Images - http://www.dipbot.unict.it/orto/0810-1.html
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http://dict.die.net/tamus%20communis/
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Image -
http://www.floracyberia.net/spermatophyta/angiospermae/dicotyledoneae/dioscoreaceae/tamus_communis.html
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http://www.ibiblio.org/pfaf/cgi-bin/arr_html?Tamus+communis&CAN=LATIND
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Pollen image - http://www.kv.geo.uu.se/pollen/T/Tamus_communis.html
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http://bodd.cf.ac.uk/BotDermFolder/BotDermD/DIOS.html