Disseminule: Fruit (referred to as achene or seed unit) pictured with persistent floral parts
Description:
Achene Colour: Striped
Achene Length: 5 - 7mmAchene Sculpture: Smooth
Achene Shape: Triangular in cross sectionSeed Colour: Brown light, Orange
Seed Length: 4 - 7mm
Seed Sculpture: RoughenedSeed Shape: Angulated
Herb 15–60 cm high, glabrous or minutely pubescent, tinged with red at maturity.
Achenes uniformly light brown or streaked with dark brown or black, sharply 3-gonous, 4-6 × 4-6 mm, faces smooth, angles prominent, unwinged or essentially so, smooth or occasionally with blunt tooth in proximal 1/ 3.
Source: See Web Links for Flora of North America
