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Medicago arborea

Common name:	Moon Trefoil	Family:	Leguminosae
Author:	L.	Botanical references:	11, 200
Synonyms:
Known Hazards:	None known
Range:	Europe - Mediterranean.
Habitat:	Scrub and rocky hillsides[184].
Edibility Rating (1-5):	1	Medicinal Rating (1-5):	0

Epithets:	From a Dictionary of Botanical Epithets
	arborea = tree like medica = medicinal
Systematics:	From a USDA Plants Database
	Order: Fabales. Renamed to Fabaceae -- Pea family
Other Range Info:	From the Ethnobotany Database
	Nc

Physical Characteristics

An evergreen shrub growing to 2m by 2m . It is hardy to zone 8 and is frost tender. It is in leaf all year, in flower from May to October. The scented flowers are hermaphrodite (have both male and female organs). 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 dry or moist soil. The plant can tolerate maritime exposure.

Habitats and Possible Locations

Woodland, Sunny Edge, Dappled Shade, By Walls, By South Wall, By West Wall.

Edible Uses

Leaves.

Leaves - raw or cooked[K]. This plant was supplied to Plants for a Future in early 1994 from a person in Greece who said that it was often used in salads there[K]. Young shoots, when the plant is growing vigorously, have a slightly sweet, grass-like flavour but a rather chewy texture[K]. Older leaves, and younger leaves if the plant is not growing vigorously, have a distinct bitterness and are rather unpleasant[K].

Medicinal Uses

Disclaimer

None known

Other Uses

None known

Cultivation details

Requires a warm position in full sun, succeeding in dry or well-drained moist soils[182]. Best grown against a wall[182] in the colder areas of the country[188]. Tolerant of wind and salt spray[200], it grows well in maritime gardens[184].
Plants are not hardy in the colder areas of Britain, they tolerate temperatures down to about -10° c when fully dormant[184, 200], though the young growth in spring can be damaged by late frosts. They do not succeed in the open at Kew, though they grow well against a wall[11].
The flowers have a vanilla or sweet pea scent[245].
Any pruning should consist of cutting out dead wood in the spring[188].
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 12 hours in warm water and then sow in spring in a greenhouse[200]. The seed can also be sown in a greenhouse in autumn. Germination should be quite rapid. Prick out the seedlings into individual pots when they are large enough to handle and grow them on for at least the first winter in a greenhouse. Plant out in late spring or early summer.
Cuttings of half-ripe wood, July/August in a frame[188]. Very easy if bottom heat is given[11].

Scent

Flowers: Fresh: The flowers have a vanilla or sweet pea scent[245].

Suppliers

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

Web References

[E] Ethnobotany Data (common names, uses, countries) from the Ethnobotany Database.
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

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.

[11] Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray 1981
A classic with a wealth of information on the plants, but poor on pictures.

[182] Thomas. G. S. Ornamental Shrubs, Climbers and Bamboos. Murray 1992 ISBN 0-7195-5043-2
Contains a wide range of plants with a brief description, mainly of their ornamental value but also usually of cultivation details and varieties.

[184] Phillips. R. & Rix. M. Shrubs. Pan Books 1989 ISBN 0-330-30258-2
Excellent photographs and a terse description of 1900 species and cultivars.

[188] Brickell. C. The RHS Gardener's Encyclopedia of Plants and Flowers Dorling Kindersley Publishers Ltd. 1990 ISBN 0-86318-386-7
Excellent range of photographs, some cultivation details but very little information on plant uses.

[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.

[245] Genders. R. Scented Flora of the World. Robert Hale. London. 1994 ISBN 0-7090-5440-8
An excellent, comprehensive book on scented plants giving a few other plant uses and brief cultivation details. There are no illustrations.

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.
Website: www.pfaf.org Phone: 0845 458 4719/_44(0) 1208 872963

This page (UK) http://www.comp.leeds.ac.uk/cgi-bin/pfaf/arr_html?Medicago+arborea
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