Helianthus ciliaris is a species of sunflower known by the common names Texas blueweed and yerba parda.

Helianthus ciliaris grows in much of the south-central and southwestern United States (from Texas north to Kansas and west to California)[1] and northern Mexico (from Tamaulipas west to Sonora and south to Durango and San Luis Potosí),[2] but it can be found elsewhere in North America where it is an introduced species and often a noxious weed.

[3][4] It is weedy even in much of its native range, growing readily in disturbed areas, on cultivated land, and along the roadside.

[2] Helianthus ciliaris is a perennial herb with distinctive blue-green foliage growing to heights of 40 to 70 centimeters (16-28 inches).

The leaves are variable in size, shape, and arrangement, but are generally narrowly lance-shaped and wavy with rough hairs along the edges.