Eriastrum sapphirinum, commonly known as Sapphire Woollystar, is an annual herb native to diverse habitats within California, including chaparral, coastal sage scrub, and open areas in the Mojave and Sonoran deserts. It typically grows 2 to 16 inches tall, with slender, spindly stems and narrow, threadlike leaves. The plant is characterized by its striking funnel-shaped flowers, which bloom in shades of blue, often with a sapphire hue, and feature light-colored stamens that contrast with the petals. The flowering season usually spans from April to July, and the flowers are known for their showiness, attracting pollinators such as bees.

Sapphire Woollystar is appreciated for its vibrant blue flowers and its adaptability to various dry environments, making it a suitable choice for rock gardens, native plant gardens, and wildflower meadows. It is often used in restoration projects and xeriscaping due to its low water requirements. This wildflower prefers well-drained soils, tolerates poor fertility, and thrives in full sun to light shade. While it is not commonly available in nurseries, it can be grown from seed. Gardeners should be aware that Eriastrum sapphirinum may not compete well with more aggressive plants and may require some protection from competition to establish well.CC BY-SA 4.0