Persicaria tinctoria
Persicaria tinctoria
Safety & Hazards
Although no specific mention has been made for this species, there have been reports that some members of this genus can cause photosensitivity in susceptible people. Many species also contain oxalic acid (the distinctive lemony flavour of sorrel) - whilst not toxic this substance can bind up other minerals making them unavailable to the body and leading to mineral deficiency. Having said that, a number of common foods such as sorrel and rhubarb contain oxalic acid and the leaves of most members of this genus are nutritious and beneficial to eat in moderate quantities. Cooking the leaves will reduce their content of oxalic acid. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition[ 238 Title Encyclopaedia of Herbs and their Uses. Publication Author Bown. D. Publisher Dorling Kindersley, London. Year 1995 ISBN 0-7513-020-31 Description 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. ].
Botanical Description
Persicaria tinctoria is an erect, usually branched annual plant growing from 50 - 80cm tall[ 266 Title Flora of China Publication Author Website http://flora.huh.harvard.edu/china/ Publisher Missouri Botanical Garden Press; St. Louis. Year 1994 ISBN Description An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available. ]. The plant has a range of local medicinal applications, the edible leaves and seeds are sometimes gathered from the wild for local use, whilst the plant also yields a blue dye. It used to be cultivated as a dye plant[ 50 Title Flora Europaea Publication Author ? Publisher Cambridge University Press Year 1964 ISBN - Description An immense work in 6 volumes (including the index). The standard reference flora for Europe, it is very terse though and with very little extra information. Not for the casual reader. , 74 Title Flora of the USSR. Publication Author Komarov. V. L. Website http://www.biodiversitylibrary.org Publisher Israel Program for Scientific Translation Year 1968 ISBN - Description An immense (25 or more large volumes) and not yet completed translation of the Russian flora. Full of information on plant uses and habitats but heavy going for casual readers. It can be downloaded from the Internet. ].