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Impatiens capensis - Meerb.

Jewelweed

Author	Meerb.	Botanical references	17, 200
Family	Balsaminaceae	Genus	Impatiens
Synonyms	Impatiens biflora - Walter. Impatiens fulva - Nutt.
Known Hazards	Regular ingestion of large quantities of these plants can be dangerous due to their high mineral content[172]. This report, which seems nonsensical, might refer to calcium oxalate. This mineral is found in I. capensis and so is probably also in other members of the genus. It can be harmful raw but is destroyed by thoroughly cooking or drying the plant[K]. People with a tendency to rheumatism, arthritis, gout, kidney stones and hyperacidity should take especial caution if including this plant in their diet[238].
Range	N. America - Newfoundland to Saskatchewan. Naturalized in Britain.
Habitat	Along the banks of rivers and canals[5], also in low-lying moist woodlands, avoiding acid soils[62].
Edibility Rating	3 (1-5)	Medicinal Rating	2 (1-5)

Physical Characteristics

Annual growing to 1.2m at a fast rate.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils 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.

Habitats

Woodland Garden; Sunny Edge; Dappled Shade; Bog Garden;

Edible Uses

Edible Parts: Leaves; Seed; Stem.

The succulent stems, whilst still young and tender, can be cut up and cooked like green beans[183]. Young leaves and shoots - cooked. They contain calcium oxalate crystals[62]. Calcium oxalate is usually destroyed by thorough cooking[K]. Large quantities of the leaves are purgative[55]. See also 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.

Antidote; Poultice; Stings; Warts.

Jewelweed was commonly used as a medicinal herb by a number of native North American Indian tribes[257], and has been widely used in domestic medicine. Its main value lies in its external application for wounds and a range of skin complaints. However, it is little used in modern herbalism and is considered to be dangerous and 'wholly questionable' when used internally[4]. The herb is antidote, cathartic, diuretic and emetic[4, 172, 207, 213]. An infusion has been used in the treatment of fevers, difficult urination, measles, stomach cramps, jaundice etc[257]. The juice of the leaves is used externally in the treatment of piles, fungal dermatitis, nettle stings, poison ivy rash, burns etc[4, 172, 207, 213, 257]. The sap is used to remove warts[207]. A poultice of the leaves is applied to bruises, burns, cuts etc[222].

Other Uses

Dye; Fungicide.

The fresh juice obtained from the plant is a fungicide. This juice can be concentrated by boiling it[62]. A yellow dye has been made from the flowers[4]. It can be made from the whole plant[257].

Cultivation details

Succeeds in any reasonably good soil[1]. Grows well in heavy clay soils. Prefers a moist well-drained humus rich soil in a cool shady site[1, 200]. Plants self-sow in areas where minimum winter temperatures go no lower than -15°c[200]. This plant has seed capsules that spring open forcibly as the seed ripens to eject the seed a considerable distance. The capsules are sensitive to touch even before the seed is ripe, making seed collection difficult but fun[K].

Propagation

Seed - sow spring in a greenhouse. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer.

Links

References

[K] Ken Fern
Notes from observations, tasting etc at Plants For A Future and on field trips.

[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]).

[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.

[5] Mabey. R. Food for Free. Collins 1974 ISBN 0-00-219060-5
Edible wild plants found in Britain. Fairly comprehensive, very few pictures and rather optimistic on the desirability of some of the plants.

[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.

[55] Harris. B. C. Eat the Weeds. Pivot Health 1973
Interesting reading.

[62] Elias. T. and Dykeman. P. A Field Guide to N. American Edible Wild Plants. Van Nostrand Reinhold 1982 ISBN 0442222009
Very readable.

[172] Schofield. J. J. Discovering Wild Plants - Alaska, W. Canada and the Northwest. 0
A nice guide to some useful plants in that area.

[183] Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990 ISBN 0-9628087-0-9
Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.

[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.

[213] Weiner. M. A. Earth Medicine, Earth Food. Ballantine Books 1980 ISBN 0-449-90589-6
A nice book to read though it is difficult to look up individual plants since the book is divided into separate sections dealing with the different medicinal uses plus a section on edible plants. Common names are used instead of botanical.

[222] Foster. S. & Duke. J. A. A Field Guide to Medicinal Plants. Eastern and Central N. America. Houghton Mifflin Co. 1990 ISBN 0395467225
A concise book dealing with almost 500 species. A line drawing of each plant is included plus colour photographs of about 100 species. Very good as a field guide, it only gives brief details about the plants medicinal properties.

[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.

[257] Moerman. D. Native American Ethnobotany Timber Press. Oregon. 1998 ISBN 0-88192-453-9
Very comprehensive but terse guide to the native uses of plants. Excellent bibliography, fully referenced to each plant, giving a pathway to further information. Not for the casual reader.

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.

Allium vineale

Michael J. Orlove D.I.C., D. Phil Sun, 25 Jul 1999

Universe! Dear Rich, 24-July-1999

I discovered your page with the following URL:

http://www.scs.leeds.ac.uk/pfaf/onions.html

In it you made reference to Allium ursinum, as "wild garlic". I always thought A. ursinum was a rare species in North American woods, and that in Britain and North America the term was usually applied to A vineale. It is also applied to A. canadesne as you know, and also feral populations of A. sativum whose origin in the New world is considered mysterious, Native Americans and early White settlers have both been suspected of introducing it, or possibly it spread on its own without human agency (which I doubt). A. vineale is a tubular leaved species but it is much more closely related to A. ampeloprasum, A. sativum, A., scorodoprasum, A. shaeonoprasum, and A. rosem than to A. cepa, or A. fistulosum. It is the one that is a pest in wheatfields because of the similarity of its bulbils in shape and density to wheat kernels, making mechanical separation very difficult.

what has fascinated me so much about A. vineale is its extreme variation in umbel contents even within a local population. some plants have flowers some bulbils, and some both. When bulbils are few or absent in the umbel, the blossoms are VERY showy --being companulate instead of ovatge.

At such times they are purple instead of green. The very showy form is known as A. V. capsuliferum in reference to its seed capsules. the half and half (bulbils and blossoms) form is called A. V. typicum, and the all bulbil one is A. v. compactgum. Two dark pigmented bulbilforms are also described, one reproduces like compactum, and is called A. v. fuscescens, and the other appears to have viviparous bulbils, but the "sprouts" are actually non-vestigal blades on scale leaves on the bulbils, and is known as A. v. crinitum. crinitum usually has one or 2 ovate flowers per umbel which are lavender or purple in color. All sorts of intermediates exist between these forms. Here in Ithaca fuscescens-like ones have flowers, and crinitum like ones don't or crinitum like ones will have many flowers and viable flowers with many capsuls forming.

I once found a clump of capsuliferum surrounded by a vast field of hundreds and thousands of typicum. Those typicum near the capliferum had purple flowers like the capsuliferum, but the ones farther out had the green flowers typical of typicum. The blossoms of this species are usually visited by tiny ants, sweat bees, or nothing at all, but the capsuliferum where being actively and aggressively visited by large bumblebees (Bombus pennsylvanicus --a large pocket maker, related to the British species B agrorum, but as big as B. terristris). Large paper wasps (Polistes fuscatus) were equally present and interested in the nectar.

An article by Hugo Iltis in the 1940's (it was either in Scientific Monthly or Atlantic Monthly) claimed that this showy capsuliferum form made it as far north a as North Carolina, and . v. typicum was as good as you could get in the Northeast.

Nevertheless this wonderful clump of capsuliferum I found was in the Bronx! that was in 1979, and it continued to persist there until 1983. could this have been global warming? the real question was this capsuliferum more related to the non - sexual nonspecific neighbors around it, or capsuliferum in N. Ccarolina? did it evolve denovo from non-sexual or less sexual forms?

Many biologists say it is a mystery how sex evolved to begin with (the origin - of- sex question" and it is equally a mystery how sex stays in the population and doesn't get selected against (the maintenance - of -sex question). John Maynard Smith (at the University of Susex), Goeffrey Parker (University of Liverpool), and George Williams (University of the State of New York at Stonybrook) have become famous elucidating and trying to solve this mystery. It seems that mating with a stranger may further the fitness of your offspring, but it appears not enough to justify throwing half-of your genes away, as a female does when mating. Plants with both cleistogamous and chasmogamous flowers, like Violo sp., Impatiens capensis (Orange balsam), and I. noli-tangeri (touch-me-not), and the very similar North American I. palida, not to mention the hog peanut, Amphicarpaea xxx, present a similar example of this mystery.

What are your thoughts on this issue? How far north does A. v. capsuliferum make it in Britain? I have found capsuliferum in Interlaken, N. Y. Near Ithaca, N. Y. where Cornell University is, but these ones were not as tall or showy as the ones from the much warmer Bronx. but they were capsuliferum, and made good seed. I have 2 accessions of them, one from a bulbil, and the other from a seed collected from the same umbel in Interlaken.

I have been unable to get them to blossom or even bolt with bulbils in my garden, just getting non scapigqarous growth every spring.

There is some folklore in this country that A. vineale takes on its capsuliferum form when in the vacinity of an underground stream, and dowsers exploit the information provided by the occurrence of the plant in particular instances.

Well I must go now, Please forgive my sloppy typing, I am disabled and it takes me eons to proofread things. Incidentally, are you in Cornwall, or Yorkshire?

Some day I will, if I only live, compare the DNA of different forms of A. V. vineale from different locations. the Bronx material seems to be now absent from the original site, I have been back 3 times over the years, and the material I collected now exists as seed in cold storage, but I lack access to it over a technicality (it was shipped to another storage facility instead to Harvard where I was going to grow it out, due to an accident, and it would take a very large sum to recover it, as well as the permission of the person who became its accidental owner who is not willing to release it to me. this is very frustrating.

sincerely yours,

Michael J. Orlove D.I.C., D. Phil

Impatiens capensis

BobR Thu Sep 4 01:17:36 2003

The American wild touch-me-not is commonly used for treatment of Rhus Sp. allergic contact dermatitis in the US. The mechanism is large tannin molecules bind the urshiol oil on the skin if applied after exposure.

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