Downingia bicornuta, commonly known as doublehorn calicoflower or double-horned downingia, is an annual herb native to vernal pools and wet meadows in the western United States, particularly in California and Oregon, extending to Idaho. It typically grows to a height of 4-16 inches (10-40 cm) with a branching erect stem and small, linear leaves. The plant is known for its striking flowers, which are 0 to 1 inch wide, featuring two prominent horn-like spurs. The flowers have blue or purple upper lobes and blue or purple lower lobes with bright yellow blotches rimmed with white, blooming from late spring to early summer. The fruit is a dehiscent capsule 1 to 3 inches long, releasing seeds when mature.

Doublehorn calicoflower is appreciated for its showy flowers that add a splash of color to wetland areas in gardens and naturalized settings. It is often used in native plant gardens, restoration projects, and as an ornamental in water features or bog gardens. Downingia bicornuta prefers full sun to part shade and requires consistently moist to wet soil conditions. It is adapted to the seasonal wet-dry cycles of its native habitat and can tolerate temporary flooding. While it is relatively low-maintenance, it may require supplemental water in gardens to mimic its natural wetland conditions. There are no major disease or pest issues associated with this plant, but it may be outcompeted by more aggressive species if not managed properly. It is not known to be invasive outside its native range.CC BY-SA 4.0