Practical
Plants

Astragalus crassicarpus

Ground Plum

a perennial member of the Astragalus genus in the family Leguminosae.

No photo available

Taxonomy and growth

Life cycle
perennial
Height
0.5 m
Fertility
Bees, Lepidoptera
Flower type
hermaphrodite
Pollinators
Bees, Lepidoptera

Uses

Toxicity

Toxicity warning. The historical record reports a hazard for this plant. Do not use it to decide which parts are safe to eat or use medicinally.

This section contains historical Plants For A Future notes marked noncommercial.

Many members of this genus contain toxic glycosides[10]. All species with edible seedpods can be distinguished by their fleshy round or oval seedpod that looks somewhat like a greengage[11]. A number of species can also accumulate toxic levels of selenium when grown in soils that are relatively rich in that element[10].

Edible uses

This section contains historical Plants For A Future notes marked noncommercial.

The thick fleshy unripe seedpods, which resemble green plums, are eaten raw or cooked[5][3][4]. They are highly esteemed[11]. The pods are about 25mm in diameter[7].

Plant part
Seedpod

Medicinal uses

Historical medicinal uses. These records describe reported uses. They do not establish safety or effectiveness. Ask a qualified health professional before using any plant medicinally.

This section contains historical Plants For A Future notes marked noncommercial.

A compound decoction or infusion of the root has been used to treat fits and convulsions and has been used on bleeding wounds[8]. It has also been taken or used externally as a stimulant[8].

Product or use
Antispasmodic
Product or use
Haemostatic
Product or use
Stimulant

Ecology and functions

Nitrogen fixer

Environment

Range
Western N. America - Eastern Rocky mountains and eastward to Nebraska.
Habitat
Prairies and plains[9].
Light
full sun
Shade tolerance
no shade
Water
low
Hardiness
Zone 7+
Soil textures
sandy, loamy
Soil pH
acid, neutral, alkaline
Drainage
well drained
Tolerates Nutritionally Poor Soil
No
Drought
intolerant

Propagation

This section contains historical Plants For A Future notes marked noncommercial.

Seed - best sown as soon as it is ripe in a cold frame[6]. A period of cold stratification may help stored seed to germinate[6]. Stored seed, and perhaps also fresh seed, should be pre-soaked for 24 hours in hot water before sowing - but make sure that you do not cook the seed[2][6]. Any seed that does not swell should be carefully pricked with a needle, taking care not to damage the embryo, and re-soaked for a further 24 hours[2][6]. Germination can be slow and erratic but is usually within 4 - 9 weeks or more at 13°c if the seed is treated or sown fresh[2]. As soon as it is large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for their first winter, planting them out into their permanent positions in late spring or early summer, after the last expected frosts.

Cultivation

This section contains historical Plants For A Future notes marked noncommercial.

Requires a dry well-drained soil in a sunny position[1]. Plants are intolerant of root disturbance and are best planted in their final positions whilst still small[6]. The stems are sometimes prostrate[6]. This species is somewhat polymorphic and is separated into a number of distinct species by some botanists[7]. The form sometimes known as A. mexicanus has larger seedpods than the type, up to 35mm in diameter[7]. 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[6]. Many members of this genus can be difficult to grow, this may be due partly to a lack of their specific bacterial associations in the soil[6].

References

  1. F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951-00-00

    ↩

  2. Rice. G. (Editor) Growing from Seed. Volume 2. Thompson and Morgan. 1988-00-00

    ↩1↩2↩3

  3. Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books 1984-00-00 ISBN 3874292169

    ↩

  4. Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990-00-00 ISBN 0-9628087-0-9

    ↩

  5. Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications 1972-00-00 ISBN 0-486-20459-6

    ↩

  6. Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992-00-00 ISBN 0-333-47494-5

    ↩1↩2↩3↩4↩5↩6↩7↩8

  7. Britton. N. L. Brown. A. An Illustrated Flora of the Northern United States and Canada Dover Publications. New York. 1970-00-00 ISBN 0-486-22642-5

    ↩1↩2↩3

  8. Moerman. D. Native American Ethnobotany Timber Press. Oregon. 1998-00-00 ISBN 0-88192-453-9

    ↩1↩2

  9. Hitchcock. C. L. Vascular Plants of the Pacific Northwest. University of Washington Press 1955-00-00

    ↩

  10. Frohne. D. and Pf�nder. J. A Colour Atlas of Poisonous Plants. Wolfe 1984-00-00 ISBN 0723408394

    ↩1↩2

  11. Harrington. H. D. Edible Native Plants of the Rocky Mountains. University of New Mexico Press 1967-00-00 ISBN 0-8623-0343-9

    ↩1↩2

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