Categories
Herbs & Plants

Taxus Brevifolia (Yew)


Botanical Name:
Taxus baccata
Family
: Taxaceae
Genus:
Taxus
Species:
T. brevifolia
Kingdom:
Plantae
Phylum:
Pinophyta
Class:
Pinopsida
Order:
Pinales


Common Names:
Yew, English yew, Common Yew

Other Names:Taxus brevifolia, Pacific Yew or Western Yew
Poisonous Parts: Leaves, seed and fruit.

Habitat :Taxus Brevifolia  is native to  Europe, incl Britain, from Scandanavia south and east to N. Africa, the Caucasus, Iran, Himalayas.   It grows in woods and scrub, usually on limestone. It sometimes forms pure stands in sheltered sites on chalk in the south-east and on limestone in the north-west.  

Description: It is a small to medium-sized evergreen tree, growing 10-15 m tall and with a trunk up to 50 cm diameter, rarely more. forming with age a very stout trunk covered with red-brown, peeling bark and topped with a rounded or wide-spreading head of branches; leaves spirally attached to twigs, but by twisting of the stalks brought more or less into two opposed ranks, dark, glossy, almost black-green above, grey, pale-green or yellowish beneath, 1/2 to 1 1/2 inches long, 1/16 to 1/12 inch wide. Flowers unisexual, with the sexes invariably on different trees, produced in spring from the leaf axils of the preceding summer’s twigs. Male, a globose cluster of stamens; female, an ovule surrounded by small bracts, the so-called fruit bright red, sometimes yellow, juicy and encloses the seed.

CLICK & SEE THE PICTURES
Bloom Color: Green, Yellow. Main Bloom Time: Early spring, Late spring, Mid spring. Form: Rounded.

It has thin scaly brown bark. The leaves are lanceolate, flat, dark green, 1-3 cm long and 2-3 mm broad, arranged spirally on the stem, but with the leaf bases twisted to align the leaves in two flat rows either side of the stem except on erect leading shoots where the spiral arrangement is more obvious.

The seed cones are highly modified, each cone containing a single seed 4-7 mm long partly surrounded by a modified scale which develops into a soft, bright red berry-like structure called an aril, 8-15 mm long and wide and open at the end. The arils are mature 6-9 months after pollination, and with the seed contained are eaten by thrushes and other birds, which disperse the hard seeds undamaged in their droppings; maturation of the arils is spread over 2-3 months, increasing the chances of successful seed dispersal. The male cones are globose, 3-6 mm diameter, and shed their pollen in early spring. It is mostly dioecious, but occasional individuals can be variably monoecious, or change sex with time.

No tree is more associated with the history and legends of Great Britain than the Yew. Before Christianity was introduced it was a sacred tree favoured by the Druids, who built their temples near these trees – a custom followed by the early Christians. The association of the tree with places of worship still prevails.

Many cases of poisoning amongst cattle have resulted from eating parts of the Yew.

Click to read about The Yew ,Sacred Tree of Transformation and Rebirth

Cultivation:
Landscape Uses:Espalier, Firewood, Hedge, Screen, Standard, Superior hedge, Specimen. A very easy plant to grow, it is extremely tolerant of cold and heat, sunny and shady positions, wet and dry soils, exposure and any pH[200]. Thrives in almost any soil, acid or alkaline, as long as it is well-drained. Grows well in heavy clay soils. Sensitive to soil compaction by roads etc. Very shade tolerant. Tolerates urban pollution.  In general they are very tolerant of exposure, though plants are damaged by severe maritime exposure. A very cold hardy plant when dormant, tolerating temperatures down to about -25°c. The fresh young shoots in spring, however, can be damaged by frosts. Plants are dioecious, though they sometimes change sex and monoecious trees are sometimes found. Male and female trees must be grown if fruit and seed is required. The fruit is produced mainly on the undersides of one-year old branches. A very long lived tree, one report suggests that a tree in Perthshire is 1500 years old, making it the oldest plant in Britain. Another report says that trees can be up to 4000 years old. It is, however, slow growing and usually takes about 20 years to reach a height of 4.5 metres. Young plants occasionally grow 30cm in a year but this soon tails off and virtually no height increase is made after 100 years. A very ornamental tree, there are many named varieties. Very resistant to honey fungus, but susceptible to phytopthera root rot. The bark is very soft and branches or even the whole tree can be killed if the bark is removed by constant friction such as by children climbing the tree. Plants produce very little fibrous root and should be planted in their final positions when still small. The fruit is greatly relished by thrushes. Special Features: Not North American native, All or parts of this plant are poisonous, Inconspicuous flowers or blooms.

Propagation:
Seed – can be very slow to germinate, often taking 2 or more years. It is best sown as soon as it is ripe in the autumn when it should germinate 18 months later. Stored seed may take 2 years or more to germinate. 4 months warm followed by 4 months cold stratification may help reduce the germination time. Harvesting the seed ‘green’ (when fully developed but before it has dried on the plant) and then sowing it immediately has not been found to reduce the germination time because the inhibiting factors develop too early. Prick out the seedlings into individual pots once they are large enough to handle and grow them on in pots in a cold frame. The seedlings are very slow-growing and will probably require at least 2 years of pot cultivation before being large enough to plant out. Any planting out is best done in late spring or early summer, after the last expected frosts. Cuttings of half-ripe terminal shoots, 5 – 8cm long, July/August in a shaded frame. Should root by late September but leave them in the frame over winter and plant out in late spring. High percentage. Cuttings of ripe terminal shoots, taken in winter after a hard frost, in a shaded frame.

Edible Uses:

Fruit – raw. Very sweet and gelatinous, most people find it delicious though some find it sickly. A number of people who like the flavour do not like the texture which is often described as being ‘snotty’. All other parts of this plant, including the seed, are highly poisonous. When eating the fruit you should spit out the large seed found in the fruit’s centre. Should you swallow the whole seed it will just pass straight through you without harm (UPDATE: this is probably not true: unfortunately, the digestive system of most mammals, including humans, is robust enough to break down the seeds. This will release the toxic taxanes. Birds are able to eat the whole “berry” because they cannot digest the seeds). If it is bitten into, however, you will notice a very bitter flavour and the seed should immediately be spat out or it could cause some problems. The fruit is a fleshy berry about 10mm in diameter and containing a single seed. Some reports suggest using the bark as a tea substitute, this would probably be very unwise.

Constituents: The fruit and seeds seem to be the most poisonous parts of the tree. An alkaloid taxine has been obtained from the seeds; this is a poisonous, white, crystalline powder, only slightly soluble in water; another principle, Milossin, has also been found.

Medicinal Uses:

The yew tree is a highly toxic plant that has occasionally been used medicinally, mainly in the treatment of chest complaints. Modern research has shown that the plants contain the substance ‘taxol’ in their shoots. Taxol has shown exciting potential as an anti-cancer drug, particularly in the treatment of ovarian cancers. Unfortunately, the concentrations of taxol in this species are too low to be of much value commercially, though it is being used for research purposes. This remedy should be used with great caution and only under the supervision of a qualified practitioner. See also the notes below on toxicity. All parts of the plant, except the fleshy fruit, are antispasmodic, cardiotonic, diaphoretic, emmenagogue, expectorant, narcotic and purgative. The leaves have been used internally in the treatment of asthma, bronchitis, hiccup, indigestion, rheumatism and epilepsy. Externally, the leaves have been used in a steam bath as a treatment for rheumatism. A homeopathic remedy is made from the young shoots and the berries. It is used in the treatment of many diseases including cystitis, eruptions, headaches, heart and kidney problems, rheumatism etc. Ingestion of 50-100g of needles can cause death.

(In homoeopathy a tincture of the young shoots and also of the berries is used in a variety of diseases: cystitis, eruptions, headache and neuralgia, affections of the heart and kidneys, dimness of vision, and gout and rheurmatism. – EDITOR) .

The chemotherapy drug paclitaxel, used in breast, ovarian and lung cancer treatment, is derived from Taxus brevifolia. Over-harvesting for production of this drug has resulted in the Pacific Yew becoming a rare species, despite the fact the drug can be produced semi-synthetically from cultivated yews. Pharmaceutical use of closely-related wild yew species in India and China threatens some of those species as well.

Click to read Taxol, an Anticancer Drug, is found in the Pacific Yew tree

Other Uses:  
Very tolerant of trimming, this plant makes an excellent hedge. The plants are often used in topiary and even when fairly old, the trees can be cut back into old wood and will resprout. One report says that trees up to 1000 years old respond well to trimming. A decoction of the leaves is used as an insecticide. Some cultivars can be grown as a ground cover when planted about 1 metre or more apart each way. ‘Repandens’ has been recommended. Wood – heavy, hard, durable, elastic, takes a good polish but requires long seasoning.  Highly esteemed by cabinet makers, it is also used for bows, tool handles etc. It makes a good firewood. The wood is burnt as an incense

Known Hazards :  All parts of the plant, except the flesh of the fruit, are highly poisonous, having a paralyzing affect on the heart. Poisoning symptoms are dry mouth, vomiting, vertigo, abdominal pain, dyspnoea, arrhythmias, hypotension & unconsciousness.

Disclaimer:
The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplements, it is always advisable to c

Yew may refer to various other species, click to read about them:
Any of various coniferous trees and shrubs in the genus Taxus:
European Yew or Common Yew (Taxus baccata)
Canadian Yew (Taxus canadensis)
Chinese Yew (Taxus chinensis)
Japanese Yew (Taxus cuspidata)
Florida Yew (Taxus floridana)
Mexican Yew (Taxus globosa)
Sumatran Yew (Taxus sumatrana)
Himalayan Yew (Taxus wallichiana)
Any of various coniferous plants in the families Taxaceae and Cephalotaxaceae:
White-berry Yew (Pseudotaxus chienii)
New Caledonian Yew or Southern Yew (Austrotaxus spicata)
Catkin-yew (Amentotaxus sp.)
Plum-yew (Cephalotaxus sp.)
Any of the various coniferous plants in the family Podocarpaceae which are superficially similar to other yews:
Prince Albert’s Yew (Saxegothaea conspicua)
Plum-yew (Prumnopitys sp.)

Fortigall Yew

Resources:
http://botanical.com/botanical/mgmh/y/yew—08.html
http://en.wikipedia.org/wiki/Taxus_brevifolia

.http://www.pfaf.org/user/plant.aspx?LatinName=Taxus+baccata

Categories
Herbs & Plants

Belladonna (Nightshade, Deadly)

[amazon_link asins=’B005P0VMWU,B00127ZF64,B0083V6UV6,B001286GZC,B002LMDF3O,B0085WM5O4,B00C3S7UDC,B001GCU1WI,0446523186′ template=’ProductCarousel’ store=’finmeacur-20′ marketplace=’US’ link_id=’c4a8d961-6d0a-11e7-9d0a-a70956dd790a’]

Botanical Name :Atropa belladonna or Atropa bella-donna,
Family: Solanaceae
Genus: Atropa
Species: A. belladonna
Kingdom: Plantae
Order: Solanales

Other name:–Nightshade, Deadly

Synonyms:-Belladonna. Devil’s Cherries. Naughty Man’s Cherries. Divale. Black Cherry. Devil’s Herb. Great Morel. Dwayberry.

Parts Used—Root, leaves, tops.

Habitat:
—Widely distributed over Central and Southern Europe, South-west Asia and Algeria; cultivated in England, France and North America.
It is not nearly as common in the wild as many field guides would suggest. This is because it is readily attacked by mint flea beetles Longitarsus waterhousei and has a low tolerance for direct sunlight. In areas where it has become naturalized it can often be found in shady, moist areas with a limestone-rich soil.

Description:

The Belladonna has dull green leaves and bell-shaped flowers that are an unremarkable shade of purple, which yield black, shiny berries measuring approximately 1 cm in diameter. The berries are sweet, but most of their alkaloids are in the seed.

click to see the pictures....>.….(01)...(1).…....(2)..…….(3).……..(4)....……………..

It is an herbaceous shrub, and can grow to be approximately one metre tall. The leaves have an oily, “poison ivy”-like feel and can cause vesicular pustular eruptions if handled carelessly. Many animals, such as rabbits, birds and deer, seem to eat the plant without suffering harmful effects, though dogs and cats are affected. Many reports suggest that people have been poisoned by eating animals which have previously eaten Belladonna, though this has not been verified.

Germination is often difficult due to the presence of germination inhibitors in the seeds. Belladonna is not common as a garden plant, and is considered a weed in some areas. It is not a very hardy perennial and is sensitive to being transplanted. Germination requires several weeks in warm, moist, absolutely sterile soil, usually far from normal garden conditions.

The root is thick, fleshy and whitish, about 6 inches long, or more, and branching. It is perennial. The purplishcoloured stem is annual and herbaceous. It is stout, 2 to 4 feet high, undivided at the base, but dividing a little above the ground into three – more rarely two or four branches, each of which again branches freely.

First-year plants grow only about 1 1/2 feet in height. Their leaves are often larger than in full-grown plants and grow on the stem immediately above the ground. Older plants attain a height of 3 to 5 feet, occasionally even 6 feet, the leaves growing about 1 to 2 feet from the ground.

The flowers, which appear in June and July, singly, in the axils of the leaves, and continue blooming until early September, are of a dark and dingy purplish colour, tinged with green, large (about an inch long), pendent, bell-shaped, furrowed, the corolla with five large teeth or lobes, slightly reflexed. The five-cleft calyx spreads round the base of the smooth berry, which ripens in September, when it acquires a shining black colour and is in size like a small cherry. It contains several seeds. The berries are full of a dark, inky juice, and are intensely sweet, and their attraction to children on that account, has from their poisonous properties, been attended with fatal results.

Cultivation
-Belladonna herb and root are sold by analysis, the value depending upon the percentage of alkaloid contained. A wide variation occurs in the amount of alkaloid present. It is important, therefore, to grow the crop under such conditions of soil and temperature as are likely to develop the highest percentage of the active principle.

Constituents: atropine,belladonnine ,choline,esculetin,hyoscyamine,nicotine ,scopolamine,tropine ,umbelliferone

Medicinal Action and Uses:
Narcotic, diuretic, sedative, antispasmodic, mydriatic. Belladonna is a most valuable plant in the treatment of eye diseases, Atropine, obtained during extraction, being its most important constituent on account of its power of dilating the pupil.

Atropine will have this effect in whatever way used, whether internally, or injected under the skin, but when dropped into the eye, a much smaller quantity suffices, the tiny discs oculists using for this purpose, before testing their patient’s sight for glasses, being made of gelatine with 1/50000 grain of Atropine in each, the entire disk only weighing 1/50 grain.

Scarcely any operation on the eye can safely be performed without the aid of this valuable drug. It is a strong poison, the amount given internally being very minute, 1/200 to 1/100 grain. As an antidote to Opium, Atropine may be injected subcutaneously, and it has also been used in poisoning by Calabar bean and in Chloroform poisoning. It has no action on the voluntary muscles, but the nerve endings in involuntary muscles are paralysed by large doses, the paralysis finally affecting the central nervous system, causing excitement and delirium.

Cosmetics:
The name belladonna originates from the historic use by women (Bella Donna is Italian for beautiful lady) to dilate their pupils; an extract of belladonna was used as eye drops as part of their makeup preparations. The Belladonna toxin’s atropine content had the effect of dilating the pupil, thus making their eyes supposedly more attractive. It is now known that atropine has anticholinergic activity – by blocking the ability of the iris to constrict, mydriasis results. Dilated pupils are considered more attractive (especially with females) because pupils normally dilate when a person is aroused, thus making eye contact much more intense than it already is. It had the adverse effect of making their vision a little blurry and making their heart rates increase. Prolonged usage was reputed to cause blindness.

Recreational drug:
Occasionally, the plant is used for recreational purposes: it is consumed in the form of either a tea or simply raw, which can produce vivid hallucinations, described by many as a ‘living dream’. Upon consumption of this plant, the user will experience all the severe, adverse anticholinergic effects before hallucinating and continue to do so while hallucinating. Use for recreational purposes is considered dangerous because of the risk of accidental overdose.
Modern medicine
The plant is an important source of atropine, which is an effective antidote to the effects of poisoning by cholinesterase inhibitors such as Parathion and Malathion. Atropine will also reverse the effects of poisoning by nerve agents designed for chemical warfare. In Europe, the plant is specifically cultivated for this purpose.

Optometrists and ophthalmologists use atropine for pupil dilation in eye examinations, though the dose used is small. Atropine degrades slowly, typically wearing off in 2 to 3 days, so tropicamide and phenylephrine is generally preferred as a mydriatic. Atropine is contraindicated in patients predisposed to narrow angle glaucoma.

Belladonna (as Atropa Belladonna Extract) can also be found in some over-the-counter cold and flu medicines (in small amounts) due to its pseudoephedrine-like qualities of clearing up nasal and other passages where mucus forms.

Alternative Medicine
Homeopathy claims Belladonna can cure or treat a variety of afflictions, including conjunctivitis, so long as the ingested preparation is so dilute as to have very few, if any, molecules of Belladonna left therein.

Different Uses:

Eye disorders: Belladonna extracts are employed to dilate the pupil of eye for age tests and eye surgery. Extracts of it’s root and leaf are used to treat spasms and colic like pain in the gastrointestinal trac and bile duct.

Brain & nervous system: Belladonna affects the brain and the central nervous system.It disrupts the effect of acetylcholine which is chemical messenger in the nervous system.

Antispasmodic
: Belladonna is an antispasmodic and can be used as a local anesthetic.

Thyroid disorders : Minute dose of belladonna can be used to treat scarlet fever and thyroid disorders as a Homeopathic medicine. Pharmacologists have also found sedative effect and narcotic qualities in belladonna. It is an ingredient in prescription drugs such as Donnatal and Laugin.

Precautions:
Belladonna should not be used by persons with narrow -angle glaucoma.It is also contraindicated for men with prostate problems.Over dose of belladonna can cause red and dry skin, dry mouth, prolonged dilation of the pupils, rapid heart beat,restlessness,hallucinations and problematic urinating.It can magnify the effects of prescription drugs such as Amatadine and Quinidine.

Powdered and extracts of belladonna are available in drug stores. It can be used as ingredients in prescription drugs.

Disclaimer:
The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplements, it is always advisable to consult with your own health care provider.

Help taken from:http://en.wikipedia.org, www.botanical.com and Miracles of Herbs  and http://www.anniesremedy.com/herb_detail209.php

Enhanced by Zemanta
css.php