Trifolium obtusiflorum, commonly known as Clammy Clover, is an annual herb native to the grasslands, meadows, and open areas within the California Floristic Province, which includes the Peninsular, Transverse, and Sierra Nevada ranges, as well as the California Coast Ranges and extends into southwestern Oregon. It typically thrives in moist, well-drained soils along streambanks, in wet meadows, and in other seasonally damp environments. Clammy Clover reaches a modest height of up to 12 inches (30 cm) and has a distinctive appearance with its hairy, glandular, and sticky leaves. The leaves consist of sharply toothed, pointed oval leaflets that can grow up to 2 inches long. During its flowering season in the spring and early summer, it produces an inflorescence that is a dense head of small, pea-like flowers, which are pink and purple with white tips, adding a splash of color to its native habitats.

Clammy Clover is valued for its ability to fix nitrogen in the soil, making it beneficial for soil health and an excellent choice for restoration projects and naturalized plantings. It is also used in wildflower meadows and as a cover crop in agriculture. This species prefers full sun to partial shade and requires regular moisture to thrive, but it is relatively low maintenance once established. While not commonly used in ornamental horticulture, it can be an interesting addition to native plant gardens.CC BY-SA 4.0