Allium unifolium
Kellogg
Amaryllidaceae
Allium grandisceptrum Davidson
Allium unifolium Vieill. ex Greene
Common Name: One-Leaved Onion
General Information
Allium unifolium is a herbaceous, perennial plant producing 2 - 3 leaves 18 - 50cm long and a flowering scape 20 - 80cm tall from an underground bulb[
270- Title
- Flora of N. America
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/fna/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.
].
The plant is harvested from the wild for local use as a food.
Known Hazards
Although no individual reports regarding this species have been seen, there have been cases of poisoning caused by the consumption, in very large quantities and by some mammals, of certain members of this genus. Dogs seem to be particularly susceptible[
76- Title
- Poisonous Plants in Britain and their Effects on Animals and Man.
- Publication
-
- Author
- Cooper. M. and Johnson. A.
- Publisher
- HMSO
- Year
- 1984
- ISBN
- 0112425291
- Description
- Concentrates mainly on the effects of poisonous plants to livestock.
].
Botanical References
60- Title
- Vascular Plants of the Pacific Northwest.
- Publication
-
- Author
- Hitchcock. C. L.
- Publisher
- University of Washington Press
- Year
- 1955
- ISBN
- -
- Description
- A standard flora for Western N. America with lots of information on habitat etc. Five large volumes, it is not for the casual reader.
,
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
,
270- Title
- Flora of N. America
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/fna/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.
Range
South-western N. America - Oregon, California and Mexico (northern Baja California)
Habitat
Moist soils in pine or mixed evergreen forest in the coastal ranges of California[
60- Title
- Vascular Plants of the Pacific Northwest.
- Publication
-
- Author
- Hitchcock. C. L.
- Publisher
- University of Washington Press
- Year
- 1955
- ISBN
- -
- Description
- A standard flora for Western N. America with lots of information on habitat etc. Five large volumes, it is not for the casual reader.
,
90- Title
- Bulbs
- Publication
-
- Author
- Phillips. R. and Rix. M.
- Publisher
- Pan Books
- Year
- 1989
- ISBN
- 0-330-30253-1
- Description
- Superbly illustrated, it gives brief details on cultivation and native habitat.
]. Moist, clay soils, including serpentine, usually along streams; at elevations up to 1,100 metres[
270- Title
- Flora of N. America
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/fna/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An on-line version of the flora with an excellent description of the plant including a brief mention of plant uses.
].
Properties
Edibility Rating | |
Habit | Bulb |
Height | 0.60 m |
Pollinators | Bees, Insects |
Cultivation Status | Wild |
Cultivation Details
Although capable of tolerating winter temperatures considerable below zero, Allium unifolium grows in areas with a distinct dry season in the summer and autumn, and the bulbs tend to rot when grown in cool wet climates, even if they are given sharp drainage[
203- Title
- Alliums. The Ornamental Onions.
- Publication
-
- Author
- Davies. D.
- Publisher
- Batsford
- Year
- 1992
- ISBN
- 0-7134-7030-5
- Description
- Covers about 200 species of Alliums. A very short section on their uses, good details of their cultivation needs.
]. When growing it in moister environments, the plant needs some protection from the wet - this can sometimes be achieved by simply placing a cloche over the plant after flowering, or by growing it in a frame[
163- Title
- Lilies and Related Plants.
- Publication
-
- Author
- RHS Lily Group.
- Publisher
-
- Year
-
- ISBN
-
- Description
- Lots of interesting snippets about plants in the family Liliaceae (in the old, broad sense)
,
203- Title
- Alliums. The Ornamental Onions.
- Publication
-
- Author
- Davies. D.
- Publisher
- Batsford
- Year
- 1992
- ISBN
- 0-7134-7030-5
- Description
- Covers about 200 species of Alliums. A very short section on their uses, good details of their cultivation needs.
].
Prefers a hot dry sunny position in a light, rich well-drained soil[
90- Title
- Bulbs
- Publication
-
- Author
- Phillips. R. and Rix. M.
- Publisher
- Pan Books
- Year
- 1989
- ISBN
- 0-330-30253-1
- Description
- Superbly illustrated, it gives brief details on cultivation and native habitat.
,
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. This species is difficult to maintain under cultivation in Britain, our weather is probably too wet and cool for it to really thrive[
142- Title
- Plants Consumed by Man.
- Publication
-
- Author
- Brouk. B.
- Publisher
- Academic Press
- Year
- 1975
- ISBN
- 0-12-136450-x
- Description
- Readable but not very comprehensive.
]. The plant has a summer resting period when it should be kept dry and so it is best grown in a cold greenhouse or bulb frame[
203- Title
- Alliums. The Ornamental Onions.
- Publication
-
- Author
- Davies. D.
- Publisher
- Batsford
- Year
- 1992
- ISBN
- 0-7134-7030-5
- Description
- Covers about 200 species of Alliums. A very short section on their uses, good details of their cultivation needs.
]. Placing a cloche over outdoor-grown plants in the summer, especially after flowering, will help to ripen the bulbs[
142- Title
- Plants Consumed by Man.
- Publication
-
- Author
- Brouk. B.
- Publisher
- Academic Press
- Year
- 1975
- ISBN
- 0-12-136450-x
- Description
- Readable but not very comprehensive.
]. Most members of this genus are intolerant of competition from other growing plants[
203- Title
- Alliums. The Ornamental Onions.
- Publication
-
- Author
- Davies. D.
- Publisher
- Batsford
- Year
- 1992
- ISBN
- 0-7134-7030-5
- Description
- Covers about 200 species of Alliums. A very short section on their uses, good details of their cultivation needs.
].
This species is not fully hardy in Britain and is unlikely to survive in the colder parts of the country. It is only marginally hardy in N.W. England[
203- Title
- Alliums. The Ornamental Onions.
- Publication
-
- Author
- Davies. D.
- Publisher
- Batsford
- Year
- 1992
- ISBN
- 0-7134-7030-5
- Description
- Covers about 200 species of Alliums. A very short section on their uses, good details of their cultivation needs.
].
A new bulb is formed annually, the old one withering away[
90- Title
- Bulbs
- Publication
-
- Author
- Phillips. R. and Rix. M.
- Publisher
- Pan Books
- Year
- 1989
- ISBN
- 0-330-30253-1
- Description
- Superbly illustrated, it gives brief details on cultivation and native habitat.
].
Edible Uses
Bulb - raw or cooked[
161- Title
- Food Plants of the N. American Indians. Publication no. 237.
- Publication
-
- Author
- Yanovsky. E.
- Publisher
- U.S. Depf of Agriculture.
- Year
-
- ISBN
- -
- Description
- A comprehensive but very terse guide. Not for the casual reader.
,
177- Title
- Plants for Human Consumption.
- Publication
-
- Author
- Kunkel. G.
- Publisher
- Koeltz Scientific Books
- Year
- 1984
- ISBN
- 3874292169
- Description
- An excellent book for the dedicated. A comprehensive listing of Latin names with a brief list of edible parts.
,
257- Title
- Native American Ethnobotany
- Publication
-
- Author
- Moerman. D.
- Publisher
- Timber Press. Oregon.
- Year
- 1998
- ISBN
- 0-88192-453-9
- Description
- 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.
]. The bulbs are 10 - 15mm in diameter[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Together with the young shoots, they are fried and eaten[
183- Title
- Cornucopia - A Source Book of Edible Plants.
- Publication
-
- Author
- Facciola. S.
- Publisher
- Kampong Publications
- Year
- 1990
- ISBN
- 0-9628087-0-9
- Description
- 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.
].
Leaves - raw or cooked[
183- Title
- Cornucopia - A Source Book of Edible Plants.
- Publication
-
- Author
- Facciola. S.
- Publisher
- Kampong Publications
- Year
- 1990
- ISBN
- 0-9628087-0-9
- Description
- 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.
].
Flowers - raw. Used as a garnish on salads.
Medicinal
Although no specific mention of medicinal uses has been seen for this species, members of this genus are in general very healthy additions to the diet. They contain sulphur compounds (which give them their onion flavour) and when added to the diet on a regular basis they help reduce blood cholesterol levels, act as a tonic to the digestive system and also tonify the circulatory system[
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
].
Agroforestry Uses:
Allium species usually grow well with most plants, especially roses, carrots, beet and chamomile, but they inhibit the growth of legumes[
18- Title
- Companion Plants.
- Publication
-
- Author
- Philbrick H. and Gregg R. B.
- Publisher
- Watkins
- Year
- 1979
- ISBN
- -
- Description
- Details of beneficial and antagonistic relationships between neighbouring plants.
,
20- Title
- Companion Planting for Successful Gardening.
- Publication
-
- Author
- Riotte. L.
- Publisher
- Garden Way, Vermont, USA.
- Year
- 1978
- ISBN
- 0-88266-064-0
- Description
- Fairly good.
,
54- Title
- How to Enjoy your Weeds.
- Publication
-
- Author
- Hatfield. A. W.
- Publisher
- Frederick Muller Ltd
- Year
- 1977
- ISBN
- 0-584-10141-4
- Description
- Interesting reading.
]. They are, in general, bad companions for alfalfa - each species negatively affecting the other[
201- Title
- A - Z of Companion Planting.
- Publication
-
- Author
- Allardice.P.
- Publisher
- Cassell Publishers Ltd.
- Year
- 1993
- ISBN
- 0-304-34324-2
- Description
- A well produced and very readable book.
].
Members of this genus are rarely if ever troubled by browsing deer[
233- Title
- Perennial Garden Plants
- Publication
-
- Author
- Thomas. G. S.
- Publisher
- J. M. Dent & Sons, London.
- Year
- 1990
- ISBN
- 0 460 86048 8
- Description
- A concise guide to a wide range of perennials. Lots of cultivation guides, very little on plant uses.
].
Other Uses
Although no specific mention has been seen for this species, the juice of most species in this genus (especially those with a strong onion or garlic smell) can be used as a moth repellent[
20- Title
- Companion Planting for Successful Gardening.
- Publication
-
- Author
- Riotte. L.
- Publisher
- Garden Way, Vermont, USA.
- Year
- 1978
- ISBN
- 0-88266-064-0
- Description
- Fairly good.
].
The whole plant is said to repel insects and moles[
20- Title
- Companion Planting for Successful Gardening.
- Publication
-
- Author
- Riotte. L.
- Publisher
- Garden Way, Vermont, USA.
- Year
- 1978
- ISBN
- 0-88266-064-0
- Description
- Fairly good.
].
Propagation
Seed - sow spring in a cold frame. Prick out the seedlings into individual pots when they are large enough to handle - if you want to produce clumps more quickly then put three plants in each pot. Grow them on in the greenhouse for at least their first winter and plant them out into their permanent positions in spring once they are growing vigorously and are large enough.
Division in spring. The plants divide successfully at any time in the growing season, pot up the divisions in a cold frame or greenhouse until they are growing well and then plant them out into their permanent positions.
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