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Project Noah Nature School
Ambrosia artemisiifolia
Common summer annual weed, deeply dissected leaves, arranged opposite when the plant is immature, with older plants having an alternate leaf arrangement; late summer flowers Life cycle: Summer annual Growth Habit: Upright Vernation: Ligule: Shape of Leaf Tip: Sheath Type: Leaf Hairs: Upper and Lower Surface Leaf Venation: Pinnate Root Type: Taproot
heavy clay soil, storm drainage ditch
produces large quantities of pollen that can lead to allergic reactions.
Spotted on Sep 25, 2015
Submitted on Oct 3, 2015
1 Comment
Ragweed is styptic, meaning that it will stop bleeding if applied to a cut.