Image of hayfield tarweed

Description:

Leaf: generally puberulent or minutely bristly or strigose and generally nonglandular throughout; distal long-soft-hairy and glandular. Inflorescence: heads in panicle-like cluster; peduncle 0 or 1--18 mm, bracts not > phyllaries; calyx-like bracts subtending heads 0; phyllaries 3--10.5 mm, tips generally slightly < bodies. Ray Flower: 5--8(13); corolla white, ray not purple-veined abaxially except NCo. Fruit: width 0.5--0.6 length.