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Indigofera heterantha

Common name: Indigo Bush Family: Leguminosae
Author: Wall. ex Brandis. Botanical references: 11, 146, 200
Synonyms: Indigofera rubroviolacea, Indigofera gerardiana (Baker.), Indigofera dosva (Lindl. non D.Don.)
Known Hazards: None known
Range: E. Asia - Himalayas from Afghanistan to W. China.
Habitat: Dry sunny slopes, often forming dense scrub, and in forests 1500 - 3000 metres[146, 184].
Edibility Rating (1-5): 1Medicinal Rating (1-5):0

Other Possible Synonyms:From various places across the web, may not be correct. See below.
I. dosua[G] I. dosua var. tomentosa[G]
Epithets:From a Dictionary of Botanical Epithets
heterantha = differing flower
Systematics:From a USDA Plants Database
Order: Fabales. Renamed to Fabaceae -- Pea family

Physical Characteristics

A decidious shrub growing to 3m by 2.5m . It is hardy to zone 7 and is frost tender. It is in leaf from May to November, in flower from August to September. The scented 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) and medium (loamy) soils and requires well-drained soil. The plant prefers acid, neutral and basic (alkaline) soils and can grow in very alkaline soil. It cannot grow in the shade. It requires dry or moist soil.

Habitats and Possible Locations

Woodland, Sunny Edge, Dappled Shade.

Edible Uses

Flowers.

The flowers are boiled and pickled[272].

Medicinal Uses

Disclaimer

None known

Other Uses

Basketry Fuel.

The branches are used in basket making and in making twig bridges[146, 158]. They are also used as a fuel[145, 158].

Cultivation details

Requires a light or medium well-drained soil and a sunny position[11, 200]. Succeeds on chalk[11]. Succeeds in full sun in most well-drained soils[184], including dry ones[182, 202]. Tolerates light shade[202].
The rootstock is hardy to about -15° c[184, 200] and plants resprout from the base if they are cut back by winter cold. Plants are cut back to the ground in most winters at Kew though they are all right in the milder areas of the country[11]. They flower on the current years growth[184] and flower more freely if they are pruned to the ground during the winter or early spring[219]. They do not come into new growth until quite late in the spring[219].
A very ornamental plant[1]. Fast-growing when young, but slowing with age[200].
The flowers have a vanilla scent[245].
Plants in this genus are notably resistant to honey fungus[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 12 hours in warm water and sow February in a warm greenhouse. The germination can be variable. Prick out the seedlings when large enough to handle and overwinter the young plants in a greenhouse for the first winter, planting out in late spring or early summer after the last expected frosts[78].
Cuttings of half-ripe wood, 5 - 8cm with a heel if possible, July/August in individual pots in a frame. Good percentage[78]. Overwinter the young plants in a greenhouse for the first winter and plant out in late spring or early summer[11].
Root cuttings 3cm long in December. Good percentage[78].
Suckers. Remove them in the dormant season, preferably towards the end of winter, and plant out into their permanent positions.

Scent

Flowers: Fresh
The flowers have a vanilla scent.

Suppliers

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

Web References

References for Indigofera dosua (a possible synonym).
  • [G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
References for indigofera gerardiana (a possible synonym).

See the PFAF Links Pages for other sources.

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

References

[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]).

[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.

[78] Sheat. W. G. Propagation of Trees, Shrubs and Conifers. MacMillan and Co 1948
A bit dated but a good book on propagation techniques with specific details for a wide range of plants.

[145] Singh. Dr. G. and Kachroo. Prof. Dr. P. Forest Flora of Srinagar. Bishen Singh Mahendra Pal Singh 1976
A good flora of the western Himalayas but poorly illustrated. Some information on plant uses.

[146] Gamble. J. S. A Manual of Indian Timbers. Bishen Singh Mahendra Pal Singh 1972
Written last century, but still a classic, giving a lot of information on the uses and habitats of Indian trees. Not for the casual reader.

[158] Gupta. B. L. Forest Flora of Chakrata, Dehra Dun and Saharanpur. Forest Research Institute Press 1945
A good flora for the middle Himalayan forests, sparsly illustrated. Not really for the casual reader.

[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.

[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.

[202] Davis. B. Climbers and Wall Shrubs. Viking. 1990 ISBN 0-670-82929-3
Contains information on 2,000 species and cultivars, giving details of cultivation requirements. The text is terse but informative.

[219] Grey-Wilson. C. & Matthews. V. Gardening on Walls Collins 1983 ISBN 0-00-219220-0
A nice little book about plants for growing against walls and a small section on plants that can grow in walls.

[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.


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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
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