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Iris macrosiphon - Torr.

Bowltube Iris

Author	Torr.	Botanical references	71, 200, 270
Family	Iridaceae	Genus	Iris
Synonyms	Iris amabilis - Eastw. Iris californica - Leichtl.
Known Hazards	Many plants in this genus are thought to be poisonous if ingested, so caution is advised[65]. The roots are especially likely to be toxic[238]. Plants can cause skin irritations and allergies in some people[238].
Range	South-western N. America - California to Oregon.
Habitat	Sunny grassy to woodland slopes below 1000 metres in California[71]. Sunny hillsides, meadows and roadsides[270].
Edibility Rating	0 (1-5)	Medicinal Rating	1 (1-5)

Physical Characteristics

Perennial growing to 0.15m.

The plant prefers light (sandy) and medium (loamy) soils and requires well-drained soil. The plant prefers acid and neutral soils. It can grow in semi-shade (light woodland) or no shade. It requires moist soil.

Habitats

Woodland Garden; Sunny Edge; Cultivated Beds;

Edible Uses

None known

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.

Oxytoxic.

The roots are used to hasten the birth of a child[257].

Other Uses

Fibre; Paper.

A fibre is obtained from the leaves. Traditionally the N. American Indians would take just the one outside fibre from each side of a leaf. This must have necessitated using a huge number of leaves. It makes a beautifully strong and pliable cord or rope[92]. The fibre can also be used for making paper[189] The leaves are harvested in 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 ball mill for 3 hours. They make a light tan paper[189].

Cultivation details

Requires a well-drained lime-free soil[79]. Requires a moist soil, growing well by water[1]. Grows well in light shade. Plants resent root disturbance, any moving is best done in early September. Hybridizes freely with other members of this genus, particularly other Pacific coast irises[129]. Iris macrosiphon hybridizes with I. chrysophylla, I. douglasiana, I. fernaldii, I. hartwegii, I. innominata, I. munzii, I. purdyi, I. tenax, and I. tenuissima[270]. Not all provenances of this species are hardy in Britain[129]. Members of this genus are rarely if ever troubled by browsing deer or rabbits[233].

Propagation

Seed - best sown as soon as it is ripe in a cold frame. Stored seed should be sown as early in the year as possible in a cold frame. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in the greenhouse or cold frame for their first year. Plant out into their permanent positions in late spring or early summer. Division, best done after flowering. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring.

Links

This plant is also mentioned in the following PFAF articles: Fiber Plants.

References

[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]).

[65] Frohne. D. and Pfänder. J. A Colour Atlas of Poisonous Plants. Wolfe 1984 ISBN 0723408394
Brilliant. Goes into technical details but in a very readable way. The best work on the subject that I've come across so far.

[71] Munz. A California Flora. University of California Press 1959
An excellent flora but no pictures. Not for the casual reader.

[79] Innes. C. The World of Iridaceae 0
Deals with many of the plants in the Iris family giving brief details of habitat and notes on cultivation. Well illustrated.

[92] Balls. E. K. Early Uses of Californian Plants. University of California Press 1975 ISBN 0-520-00072-2
A nice readable book.

[129] ? Alpine Garden Society Bulletin. Volume 56. Alpine Garden Society 0
Excerpts from the periodical. Some details on Corydalis spp.

[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.

[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.

[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.

[270] Flora of N. America 0
An on-line version of the flora with an excellent description of the plant including a brief mention of 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.

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