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Canna indica - L.

Indian Shot

Author	L.	Botanical references	50, 200
Family	Cannaceae	Genus	Canna
Synonyms
Known Hazards	None known
Range	S. America. W. Indies. Locally naturalized in the warmest parts of S. Europe[50].
Habitat	Original habitat is obscure, but it is found by the coast and in temperate valleys of the Andes[97].
Edibility Rating	4 (1-5)	Medicinal Rating	2 (1-5)

Physical Characteristics

Perennial growing to 1.5m by 0.6m.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and requires well-drained soil. The plant prefers acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It requires moist soil.

Habitats

Woodland Garden; Sunny Edge; Cultivated Beds; South Wall By; West Wall By;

Edible Uses

Edible Parts: Fruit; Root.

Root - cooked. The source of 'canna starch', used as an arrowroot[97, 177]. The arrowroot is obtained by rasping the root to a pulp, then washing and straining to get rid of the fibres[2]. The very young tubers are eaten cooked, they are sweet but fibrousy[97, K]. Roots contain about 25% starch[61]. There is one report that this plant has an edible fruit[177] but this is somewhat dubious, the fruit is a dry capsule containing the very hard seeds[K].

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.

Demulcent; Diaphoretic; Diuretic; VD; Women's complaints.

The plant is used in the treatment of women's complaints[218]. A decoction of the root with fermented rice is used in the treatment of gonorrhoea and amenorrhoea[218]. The plant is also considered to be demulcent, diaphoretic and diuretic[218].

Other Uses

Dye; Fibre; Insecticide; Paper.

The plant yields a fibre - from the stem? - it is a jute substitute[114]. A fibre obtained from the leaves is used for making paper[189]. The leaves are harvested in late summer after the plant has flowered, they are scraped to remove the outer skin and are then soaked in water for 2 hours prior to cooking. The fibres are cooked for 24 hours with lye and then beaten in a blender. They make a light tan brown paper[189]. A purple dye is obtained from the seed[114]. Smoke from the burning leaves is said to be insecticidal[218].

Cultivation details

Requires a deep rich well-drained soil in a sunny position[200]. The plant has large leaves and dislikes windy conditions since this can tear the leaves to shreds[200]. This species is probably hardy in the mildest areas of Britain but even then it should be given a good mulch if left in the ground overwinter[1, 200]. Plants have survived temperatures down to about -5°c overwinter with us[K]. This species is often grown as a summer bedding plant in Britain, especially in sub-tropical bedding schemes. In colder areas of the country the tubers can be harvested in late autumn after the top growth has been killed back by frost and stored over winter. They should be kept in a cool but frost-free place covered in moist soil or leaves[1]. Plants are cultivated for their edible root in the Tropics. Slugs love the young growth in spring and can cause serious damage to plants[233].

Propagation

Seed - pre-soak for 24 hours in warm water and sow February/March in a warm greenhouse at 20°c[1, 138]. Plant the seeds 2 - 5cm deep in individual pots[1]. Scarifying the seed can speed germination, especially if the seed has not swollen after being soaked[124, K]. The seed usually germinates in 3 - 9 weeks[138]. Grow the plants on in a greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Division of the root clump as the plant comes into growth in the spring. Each portion must have at least one growing point. Pot up the divisions and grow them on in the greenhouse until they are well established and then plant them out in the summer. Root cuttings.

Links

This plant is also mentioned in the following PFAF articles: Edible Ornamental Plants, Conservatory Plants.

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]).

[2] Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications 1972 ISBN 0-486-20459-6
Lots of entries, quite a lot of information in most entries and references.

[50] ? Flora Europaea Cambridge University Press 1964
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.

[61] Usher. G. A Dictionary of Plants Used by Man. Constable 1974 ISBN 0094579202
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.

[97] Towle. M. A. The Ethno-Botany of Pre-Columbian Peru. 0
A very interesting book covering quite a lot of information on plant uses in S. America although many of the plants are not suitable for temperate areas..

[114] Chakravarty. H. L. The Plant Wealth of Iraq. 0
It is surprising how many of these plants can be grown in Britain. A very readable book on the useful plants of Iraq.

[124] RHS. The Garden. Volume 113. Royal Horticultural Society 1988
Snippets of information from the magazine of the RHS, including details on Podophyllum, Canna and Protea species.

[138] Bird. R. (Editor) Growing from Seed. Volume 3. Thompson and Morgan. 1989
Very readable magazine with lots of information on propagation.

[177] Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books 1984 ISBN 3874292169
An excellent book for the dedicated. A comprehensive listing of latin names with a brief list of edible parts.

[189] Bell. L. A. Plant Fibres for Papermaking. Liliaceae Press 1988
A good practical section on how to make paper on a small scale plus details of about 75 species (quite a few of them tropical) that can be used.

[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.

[218] Duke. J. A. and Ayensu. E. S. Medicinal Plants of China Reference Publications, Inc. 1985 ISBN 0-917256-20-4
Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.

[233] Thomas. G. S. Perennial Garden Plants J. M. Dent & Sons, London. 1990 ISBN 0 460 86048 8
A concise guide to a wide range of perennials. Lots of cultivation guides, very little on plant uses.

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.

Weeds as a future source for human consumption

Martha Díaz B Thu Jun 28 17:02:26 2001

We reciently recieved this article on the use of various weeds in south america. We though that you might enjoy it.

Abstract

Weeds may constitute an additional food source for humans. Up to 66% of weed species are edible and abound in urban and agricultural environments. A total of 43 species were sampled in tropical areas in Coatepec Mexico (e.g. roadsides, urban vacant lots, streets, sugar cane and coffee plantations). A similar survey performed in a temperate area in Bariloche Argentina with 32 species sampled. At a greater geographic scale, a comparison between Mexican and Argentine weeds shows that, proportionately, the food parts vary a little between regions. In general, the uses go from leaves, seeds, roots, fruits, and flowers.

Link: Weeds as a future source for human consumption

Weeds as a future source for human consumption

Klaus Thu Aug 16 16:12:55 2001

I really wonder what this has to do with montia perfoliata. The edible uses of weeds might be interesting, but not as a comment to this plant.

Canna indica

Susan Sackinger Sun Jul 3 06:50:22 2005

The immature seeds are used in tortillas.

The spherical, black, mature seeds are used as beads in jewelry, rosaries, and as spacers. It can also be shot from a BB-gun (not recommended, but tested)

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