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Lotus tetragonolobus

Common name:	Asparagus Pea	Family:	Leguminosae
Author:	L.	Botanical references:	50, 200
Synonyms:	Tetragonolobus purpurea (Moench.)
Known Hazards:	None known
Range:	Europe - Mediterranean.
Habitat:	Cultivated ground and vineyards.
Edibility Rating (1-5):	2	Medicinal Rating (1-5):	0

Other Possible Synonyms:	From various places across the web, may not be correct. See below.
	L. tetragonolubus[HORTIPLEX] Tetragonolobus purpureus[G,HPIC,P]
Other Common Names:	From various places around the Web, may not be correct. See below.
	Winged Pea [P],
Systematics:	From a USDA Plants Database
	Order: Fabales. Renamed to Fabaceae -- Pea family

Physical Characteristics

Annual growing to 0.3m by 0.25m . . It is in flower from June to August, and the seeds ripen from September to October. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects. It can fix Nitrogen. We rate it 2/5 for edibility and 0/5 for medicinal use.

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 dry or moist soil.

Habitats and Possible Locations

Cultivated Beds.

Edible Uses

Coffee; Seed; Seedpod.

Young seedpods - raw or cooked[16, 27, 33]. Added to salads, cooked as a vegetable or added to soups, stews etc[183]. The taste is said to resemble asparagus[183]. Only the very young pods, when less than 25mm long, should be used, since the older pods quickly turn fibrous[183]. Considered by many to be a gourmet food, though it is not a very high yielding crop[K].
Seed - cooked. Used like peas[105, 177, 183].
The roasted seed is used as a coffee substitute[27, 183].

Medicinal Uses

Disclaimer

None known

Other Uses

None known

Cultivation details

Succeeds in an ordinary garden soil[1], preferring a rich light well-drained soil in a sunny position[33].
Occasionally cultivated for its edible young seedpods and also as an ornamental plant[16, 33].
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]. When removing plant remains at the end of the growing season, it is best to only remove the aerial parts of the plant, leaving the roots in the ground to decay and release their nitrogen.

Propagation

Pre-soak the seed for 24 hours in warm water and then sow in situ in the spring[33]. The seed usually germinates in 2 - 4 weeks at 15°c.
If seed is in short supply, it can be sown in pots in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in late spring or early summer[33].

Suppliers

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

Web References

[H] Details of Scandanavian and European Common names in Henriette's names database
[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.

References for Lotus tetragonolubus (a possible synonym).

[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for Tetragonolobus purpureus (a possible synonym).

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

References for tetragonolobus purpureus (a possible synonym).

[HP] PhotoFrom Henriette's plant pictures
[HP] PhotoFrom Henriette's plant pictures

See the PFAF Links Pages for other sources.

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

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]).

[16] Simons. New Vegetable Growers Handbook. Penguin 1977 ISBN 0-14-046-050-0
A good guide to growing vegetables in temperate areas, not entirely organic.

[27] Vilmorin. A. The Vegetable Garden. Ten Speed Press ISBN 0-89815-041-8
A reprint of a nineteenth century classic, giving details of vegetable varieties. Not really that informative though.

[33] Organ. J. Rare Vegetables for Garden and Table. Faber 1960
Unusual vegetables that can be grown outdoors in Britain. A good guide.

[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.

[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.

[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.

[183] Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990 ISBN 0-9628087-0-9
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.

[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.

Readers Comments

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Bibliography

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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We make no claims of magical effects or supernatural powers for any item in this catalog. In spite of legendary attributes or occult and craft tradition, such items are offered as curios only and beliefs concerning their magical effectiveness are related only for historical interest.