Arabis filifolia Sibara filifolia, the Santa Cruz Island winged rockcress[1] or Santa Cruz Island rockcress, is a rare species of flowering plant in the family Brassicaceae.

[5] Sibara filifolia is an annual herb producing a hairless, sometimes waxy stem up to around 30 centimeters in maximum height.

The leaves are very narrow and almost strandlike, measuring less than a millimeter wide, and growing about 1.5 centimeters long.

The fruit is a flattened, elongated silique up to 4 centimeters long containing tiny seeds.

Sibara filifolia grows in the coastal sage scrub of two islands off the coast of southern California.