Taxus wallichiana
Taxus wallichiana
Safety & Hazards
All parts of the plant, except the flesh of the fruit (actually an aril), are potentially highly poisonous. They contain the alkaloid taxine and , if ingested, can cause nervousness, trembling, slow pulse, pupil dilation, difficult breathing, abdominal pain, vomiting, diarrhoea, weakness and convulsions - in larger doses it can be fatal, having a paralyzing affect on the heart[ 1 Title RHS Dictionary of Plants plus Supplement. 1956 Publication Author F. Chittendon. Publisher Oxford University Press Year 1951 ISBN - Description Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [ 200 ]). , 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. , 7 Title Encyclopaedia of Medicinal Plants. Publication Author Chiej. R. Publisher MacDonald Year 1984 ISBN 0-356-10541-5 Description Covers plants growing in Europe. Also gives other interesting information on the plants. Good photographs. , 10 Title Poisonous Plants and Animals. Publication Author Altmann. H. Publisher Chatto and Windus Year 1980 ISBN 0-7011-2526-8 Description A small book, reasonable but not very detailed. , 19 Title Poisonous Plants. Publication Author Stary. F. Publisher Hamlyn Year 1983 ISBN 0-600-35666-3 Description Not very comprehensive, but easy reading. , 65 Title A Colour Atlas of Poisonous Plants. Publication Author Frohne. D. and Pfänder. J. Publisher Wolfe Year 1984 ISBN 0723408394 Description Brilliant. Goes into technical details but in a very readable way. The best work on the subject that I've come across so far. , 293 Title Poisonous Plants of North Carolina Publication Author Website http://www.ces.ncsu.edu/depts/hort/consumer/poison/poison.htm Publisher Year 0 ISBN Description An excellent concise but comprehensive guide to toxic plants that grow in N. Carolina. It lists even those plants that are of very low toxicity, including several well-known food plants such as carrots and potatoes. ].
Botanical Description
Taxus wallichiana is an evergreen shrub or a tree. In open situations on rocky slopes and cliffs it usually forms a large, broadly spreading shrub, but in woodland it is more likely to become a small to medium-sized tree[ 338 Title IUCN Red List of Threatened Species Publication Author Website http://www.iucnredlist.org/ Publisher Year 0 ISBN Description A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat. ]. The plant is harvested in large quantities from the wild for local use, mainly as a medicine, but also as a food and source of materials. It is sold in local markets[ 2020 Title Trade in Indian Medicinal Plants Publication Ethnobotany of India Vol 5., 321-345, 2018 Author D.K.Ved, S.Noorunnisa Begum, & K.Ravi Kumar Publisher Apple Academic Press; Oakville, Canada Year 2018 ISBN 978-1-77188-600-0 Description ]. The leaves and bark have been harvested commercially from the wild as a source of the anticancer drug taxol'. This harvesting has proved to be unsustainable, and efforts are being made to cultivate the plant for this purpose. It is sometimes grown as an ornamental, mainly in Asia[ 338 Title IUCN Red List of Threatened Species Publication Author Website http://www.iucnredlist.org/ Publisher Year 0 ISBN Description A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat. ]. Across most of its range through the Himalayas and western China, Taxus wallichiana has been heavily exploited for its leaves and bark which are used to produce the anti-cancer drug paclitaxel or similar chemicals. Declines of up to 90% have been reported in India and Nepal while in western China declines of more than 50% have been reported. The degree of exploitation in Myanmar is uncertain. In Viet Nam the subpopulation is limited to several hundred trees within a very limited area of Lam Dong Province. This remnant subpopulation was more extensive in the recent past but has declined due to deforestation and conversion of forests for agriculture. The status of Taxus populations in the Philippines and Indonesia is less clear. Some reports of exploitation associated with taxol production have come from the Philippines (Agillion 2007) but these have not been well documented. Although the Philippines has lost the vast majority of its forest cover through logging and agricultural expansion, the degree to which this has effected Taxus is unknown and ground truthing of both recent and historic records is needed. In Sulawesi and Sumatera widespread deforestation has been concentrated in the lowlands rather than the montane areas where estimates of decline are as low as 5% (Cannon et al. 2007, Laumonier et al. 2010). As with the Philippines further field work is required to ascertain the status of Taxus in these areas. The plant is classified as 'Endangered' in the IUCN Red List of Threatened Species(2013)[ 338 Title IUCN Red List of Threatened Species Publication Author Website http://www.iucnredlist.org/ Publisher Year 0 ISBN Description A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat. ].