Astragalus (plant)

Astragalus is a large genus of flowering plants in the Fabaceae family, which includes the well-known legumes such as beans and peas. With over 3,000 species, it is one of the largest genera of plants. The members of this genus are commonly known as milkvetches, locoweeds, or goat's-thorns. They are distributed widely across the Northern Hemisphere, including North America, Asia, and Europe, and are found in a variety of habitats, from forests and grasslands to alpine regions.

Description

Astragalus species can vary significantly in appearance, from small herbs to large shrubs. They typically have compound leaves made up of many small leaflets and produce flowers that are often arranged in inflorescences. The flowers can be white, yellow, purple, or pink, and they are followed by fruits that are usually legumes, a characteristic feature of the Fabaceae family.

Ecology

Astragalus plays an important role in its ecosystems. Many species are nitrogen-fixing, which helps to enrich the soil. They are also a source of food for various insects and animals. However, some species of Astragalus contain toxic compounds and can be poisonous to livestock, particularly the species known as locoweeds.

Uses

Several species of Astragalus are used in traditional medicine, most notably in Traditional Chinese Medicine (TCM). Astragalus membranaceus, for example, is believed to boost the immune system and has been used to treat various ailments. In addition to medicinal uses, some species are used for food, either for their edible seeds or as forage for animals.

Conservation

While many species of Astragalus are common and not considered at risk, there are several species that are threatened or endangered due to habitat loss, overgrazing, and other environmental pressures. Conservation efforts are underway in various parts of the world to protect these species and their habitats.

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Astragalus (plant)

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  Close-up of Borrego Milkvetch

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  Astragalus hamosus specimen