Trifolium dubium is a species of a clover plant that often grows in dry grasslands and sandy soil. This clover plant is commonly known as Lesser Trefoil or Lesser Hop Clover. Some of the synonyms for Trifolium dubium include Shamrock Clover, Yellow Clover, and Hop Trefoil. The plant is a low-growing annual herb that is known for its bright yellow flowers that bloom during the summer. You can identify the Lesser Trefoil with its distinctive three-part leaves that are similar to a shamrock. This plant species is essential as a food source for honeybees and other insects. Additionally, it is a valuable cattle forage plant which is often sown into pastures to improve forage quality.