Texas blueweed

Helianthus ciliaris

Helianthus ciliaris is a perennial herb with distinctive blue-green foliage growing to heights of 40 to 70 centimeters (16-28 inches). It has a tough, horizontally spreading root system which sprouts new plants at distances from the parent, and can also sprout after being fragmented, so plowing the plant under can actually help it spread. The leaves are variable in size, shape, and arrangement, but are generally narrowly lance-shaped and wavy with rough hairs along the edges. The inflorescence holds a mass of at least 35 yellow-tipped red disc florets often surrounded by a fringe of 10-18 curling yellow ray florets, although some heads lack ray florets.

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