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Lathyrus polymorphus

Common name:	Manystem Peavine	Family:	Leguminosae
Author:	Nutt.	Botanical references:	235
Synonyms:	Lathyrus decaphyllus (Pursh.)
Known Hazards:	Although no records of toxicity have been found for this plant, the seed of some species in this genus contain a toxic amino acid that can cause a severe disease of the nervous system known as 'lathyrism' if they are eaten in large amounts (although small quantities are said to be nutritious)[65, 76]. Great caution is advised.
Range:	Western N. America - Idaho and Colorado to Arizona and New Mexico.
Habitat:	Hillsides and open places in western S. Dakota.
Edibility Rating (1-5):	1	Medicinal Rating (1-5):	0

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	L. ornatus[G] L. polymorphus ssp. polymorphus var. polymorphus[P] L. polymorphus subsp. polymorphus[G] L. polymorphus var. polymorphus[B]
Other Common Names:	From various places around the Web, may not be correct. See below.
	Hoary Vetchling [B], Manystem Peavine [P],
Epithets:	From a Dictionary of Botanical Epithets
	polymorphus = taking many forms
Systematics:	From a USDA Plants Database
	Order: Fabales. Renamed to Fabaceae -- Pea family

Physical Characteristics

Perennial growing to 0.4m. . It is in flower from June to July, and the seeds ripen from July to August. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects. It can fix Nitrogen. We rate it 1/5 for edibility and 0/5 for medicinal use.

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

Habitats and Possible Locations

Cultivated Beds.

Edible Uses

Seedpod.

Seedpods and seeds[46, 61, 105, 257]. No more details are given.

Medicinal Uses

Disclaimer

None known

Other Uses

None known

Cultivation details

We have very little information on this species and do not know if it will be hardy in Britain. The following notes are based on the general needs of the genus.
An easily grown plant, succeeding in any moderately good garden soil but preferring a position in full sun[200].
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].

Propagation

Pre-soak the seed for 24 hours in warm water and then sow in early spring in a cold frame[200]. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer.
If you have sufficient seed, then it can also be sown in situ in mid spring[200].
Division in spring. It may not transplant well so care should be taken[200].

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

Web References

Latin and Worldwide Common Names From Multilingual Multiscript Plant Name Database by M. H. Porcher et. al. 1995 - 2000 Landcare Systems Research Laboratory, Department of Crop Production,Institute of Land and Food Resources, The University of Melbourne, Australia.
[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for Lathyrus polymorphus ssp. polymorphus var. polymorphus (a possible synonym).

[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.

References for Lathyrus polymorphus subsp. polymorphus (a possible synonym).

[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.

References for Lathyrus polymorphus var. polymorphus (a possible synonym).

[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[46] Uphof. J. C. Th. Dictionary of Economic Plants. Weinheim 1959
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.

[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.

[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.

[76] Cooper. M. and Johnson. A. Poisonous Plants in Britain and their Effects on Animals and Man. HMSO 1984 ISBN 0112425291
Concentrates mainly on the effects of poisonous plants to livestock.

[105] Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing 1976
The most comprehensive guide to 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.

[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.

[235] Britton. N. L. Brown. A. An Illustrated Flora of the Northern United States and Canada Dover Publications. New York. 1970 ISBN 0-486-22642-5
Reprint of a 1913 Flora, but still a very useful book.

[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

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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
WEB search engine by Rich Morris - Home Page- Contact Info
Blagdon Cross, Ashwater, Beaworthy, Devon, EX21 5DF, UK.
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