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Useful Temperate Plants

Pediomelum castoreum

(S.Watson) Rydb.

Fabaceae


We are following the treatment in the USDA 'Plants Database' (https://plants.usda.gov/core/profile?symbol=PECA24 accessed 02/10/2018). Some other treatments retain this species in Psoralea as Psoralea castorea S.Watson.

+ Synonyms

Psoralea castorea S.Watson

Common Name: Beaver Indian Breadroot

No Image.

General Information

Pediomelum castoreum is a low-growing, erect, herbaceous perennial plant growing from a deep-rooted, spindle-shaped taproot that can be 5 - 8cm long and 1 - 3cm wide; the plant usually only produces a single stem 2 - 5cm tall, sometimes with decumbent branches 10cm or more long.
This is one of several related species that provide an edible, nutritious root and, as such, was commonly harvested for food by the native N. Americans. It is still often used as a wild food.

Known Hazards

Although no specific mention of toxicity for this species has been found, at least some members of this genus are known to contain furanocoumarins, particularly psoralen and angelicin. These compounds can be found in low concentrations in many common foods including citrus fruirs, celery, parsley and parsnips. Ingestion or skin application of these compounds in larger quantities can cause skin photosensitization followed by hyperpigmentation[
65
Title
A Colour Atlas of Poisonous Plants.
Publication
 
Author
Frohne. D. and Pfänder. J.
Publisher
Wolfe
Year
1984
ISBN
0723408394
Description
Brilliant. Goes into technical details but in a very readable way. The best work on the subject that I've come across so far.
,
1572
Title
Furocoumarins and Other Secondary Metabolites from Psoralea canescens
Publication
International Journal of Pharmacognosy, 1997, Vol 35, 4 pp 232-236
Author
Innocenti G.; Bourgaud F.; Piovan A. & Favretto D.
Publisher
 
Year
1997
ISBN
0925-1618
Description
 
].

Botanical References

71
Title
A California Flora.
Publication
 
Author
Munz P.A. & Keck D.D.
Publisher
University of California Press; Los Angeles
Year
1959
ISBN
-
Description
An excellent flora but no pictures. Not for the casual reader.

Range

Southwestern N. America - California, Nevada, Arizona.

Habitat

Dry sandy flats and washes, at elevations from 500 - 900 metres in California[
71
Title
A California Flora.
Publication
 
Author
Munz P.A. & Keck D.D.
Publisher
University of California Press; Los Angeles
Year
1959
ISBN
-
Description
An excellent flora but no pictures. Not for the casual reader.
].

Properties

Edibility Rating *  *  *  *
HabitPerennial
Height0.04 m
PollinatorsInsects
Cultivation StatusWild

Cultivation Details


Succeeds in an ordinary garden soil[
1
Title
RHS Dictionary of Plants plus Supplement. 1956
Publication
 
Author
F. Chittendon.
Publisher
Oxford University Press
Year
1951
ISBN
-
Description
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
]. Requires a well-drained soil in a sunny position[
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.
].
Plants are very intolerant of root disturbance, they are best planted out into their permanent positions whilst still small[
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 has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[
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.
].

Edible Uses

Root - raw or cooked[
2
Title
Sturtevant's Edible Plants of the World.
Publication
 
Author
Hedrick. U. P.
Publisher
Dover Publications
Year
1972
ISBN
0-486-20459-6
Description
Lots of entries, quite a lot of information in most entries and references.
,
46
Title
Dictionary of Economic Plants.
Publication
 
Author
Uphof. J. C. Th.
Publisher
Weinheim
Year
1959
ISBN
-
Description
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
105
Title
Tanaka's Cyclopedia of Edible Plants of the World.
Publication
 
Author
Tanaka. T. & Nakao S.
Publisher
Keigaku Publishing; Tokyo
Year
1976
ISBN
-
Description
The most comprehensive list of edible plants I've come across. Only the briefest entry for each species, though, and some of the entries are more than a little dubious. Not for the casual reader.
,
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.
,
1438
Title
Food Plants in the Americas: A Survey of the Domesticated, Cultivated, and Wild Plants Used for Human Food in North,
Publication
 
Author
Kermath B.M.; Bennett B.C.' Pulsipher L.M.
Publisher
 
Year
2014
ISBN
 
Description
A pre-publication draft of an amazing, on-going work first started in 1985. It contains information on more than 3,900 taxa from the Americas - from Arctic regions to the Tropics
]. A good size[
85
Title
Edible Native Plants of the Rocky Mountains.
Publication
 
Author
Harrington. H. D.
Publisher
University of New Mexico Press
Year
1967
ISBN
0-8623-0343-9
Description
A superb book. Very readable, it gives the results of the authors experiments with native edible plants.
]. Rich in starch, the root can also be dried and ground into a powder then used in soups or with cereals for making bread etc[
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.
,
1309
Title
The Leguminosae; A Source Book of Characteristics, Uses and Nodulation
Publication
 
Author
Allen O.N.; Allen E.K.
Publisher
University of Wisconsin
Year
1981
ISBN
0-333-32221-5
Description
An amazing and comprehensive work, giving a brief guide to the many genera of the family Fabaceae and also the principle uses of the genus.
]. The spindle-shaped root is 5 - 8cm long and 1 - 3cm thick.

Medicinal

None known

Other Uses

None known

Propagation

Pre-soak the seed for 24 hours in warm water, ensuring the seed has swollen before sowing.
Sowing outdoors in situ is probably the safest way to start this plant off. If doing this, and seed stocks are in short supply, sow the seed in early spring around 5 - 10mm deep and place a moderate sized clear glass or plastic jar over the seed to help protect it from predation. Remove the jar once the plant is growing well.
Alternatively, sow the soaked seed in early to mid spring in a greenhouse. Either sow the seed in individual pots or pot up the young seedlings as soon as possible in order to avoid root disturbance. Grow them on in the pots until planting out in their final positions. It is usually impossible to transplant this species without fatal damage to the root[
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.
].
Division in spring. With great care since the plant resents root disturbance. It is virtually impossible to divide this species successfully[
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.
].
Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2019-08-20. <temperate.theferns.info/plant/Pediomelum+castoreum>

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