AppearanceIt is a herbaceous biennial or annual plant, growing to 10–30 cm tall, with distinctive yellow flowerheads that superficially resemble Hop flowers. Each flowerhead is a cylindrical or spherical collection of 20–40 individual flowers. The flowers become brown upon aging and drying. The leaves are alternate and trifoliate, with three oblong or elliptical leaflets 4–10 mm long.
UsesHop trefoil is the third most important clover in agriculture because its foliage is good for feeding livestock and replenishing soil. It is not generally planted, but is considered a valuable herb when found growing in a pasture. It has become naturalised in North America, particularly in the west and south of the continent.
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