Calochortus clavatus, commonly known as Clubhair Mariposa Lily, is a perennial herb endemic to California, specifically native to the open woodlands, grassy slopes, and chaparral of the coastal ranges and the Sierra Nevada foothills. It can reach a height of up to 3 feet with a basal rosette of long, narrow leaves that wither at flowering time. The species is known for its distinctive flowers, which bloom from late spring to early summer. Each flower has three sepals and three petals, up to 2 inches long, that are yellow with darker bands near the base. The petals are adorned with club-shaped hairs, giving the plant its common name. The anthers are often a striking deep purple, and the flowers are followed by elongated, erect capsule fruits that can reach 4 inches in length.

Clubhair Mariposa Lily is valued for its unique and showy flowers, which make it a desirable addition to native plant gardens and wildflower meadows. It is also used in restoration projects within its native range. The plant prefers well-drained soils, tolerates drought conditions once established, and thrives in full sun to light shade. While it is not commonly found in cultivation, it can be grown from seed or bulbs. There are no major diseases or pests that affect this species significantly, but it is sensitive to overwatering and poor drainage.CC BY-SA 4.0