Burr medic
Medicago polymorpha
Medicago polymorpha, commonly known as burr medic or California burclover, is a species of annual legume in the Fabaceae family. Native to the Mediterranean region, it has become widespread in various parts of the world, particularly in temperate climates. Here's an informative description:
Description:
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Habitat: Burr medic is adaptable to a range of habitats and is commonly found in disturbed areas, pastures, fields, and along roadsides. It thrives in well-drained soils.
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Growth Form: This annual legume typically grows as a prostrate or ascending plant, forming a low-spreading habit. It can reach heights of 10 to 40 cm.
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Leaves: The leaves are compound, consisting of three oval leaflets, each with toothed edges. The leaflets are arranged alternately along the stems.
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Flowers: Burr medic produces small, yellow flowers arranged in clusters at the tips of the stems. The flowers have a papilionaceous structure typical of legumes.
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Inflorescence: The inflorescence is a dense raceme or cluster of flowers that may become coiled as the seed pods mature.
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Fruits: The fruits are small, coiled pods covered in short, stiff hairs, forming a distinctive bur-like appearance. Each pod contains seeds.
Identification Features:
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Compound Leaves: The leaves consist of three oval leaflets arranged alternately along the stems.
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Yellow Flowers: Small, yellow, papilionaceous flowers are arranged in clusters at the stem tips.
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Coiled Seed Pods: The most distinctive feature is the small, coiled pods covered in stiff hairs, resembling tiny burrs.
Ecological Role:
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Burr medic is valued for its nitrogen-fixing abilities, contributing to soil fertility.
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It serves as a forage plant for livestock and wildlife due to its palatable nature.
Invasive Potential:
- While valued in certain contexts, burr medic can become invasive in non-native regions, particularly where it outcompetes native vegetation.
