Other Scientific Names:
Records of Adonis annua from western states were based on misidentified Adonis aestivalis (Flora of North America).
Other Common Names: Autumn adonis, bird's-eye
Weed class: monitor list
Native to: Asia, Europe and Northern Africa
Why Is It a Noxious Weed?
How would I identify it?
Herbaceous, upright annual that can grow to 18 inches (45cm) tall.
Flowers are cup-shaped, 0.6 to 1 inch (1.5-2.5 cm) in diameter. Its sepals are appressed to the petals. Sepals broadly obovate, minutely ciliate (hairy). Flowers have 6-10 spreading petals, dark red (orange to red-purple), usually with a dark basal blotch. Stamens 15-20, anthers purple-black when young, and pistils 20-30.
Leaves are finely divided, 2-3 pinnate, and are 1 1/4 to 2 inches (3-5cm) long. Leaflets are linear.
Fruit Seed Description
Fruit is a head of achenes, short-cylindric, with each achene 3-5 mm, hairless, beak straight 0.5-1 mm. Body of achene without transverse flange, abaxial keel not toothed.