Northern Prairie Wildlife Research Center
Southern Wetland Flora
Field Office Guide to Plant Species
New York Ironweed
Vernonia noveboracensis (L.) Michx.
- Family: Aster (Asteraceae)
- Flowering: July-October
- Field Marks: This species is easily distinguished from other Vernonias by the black or dark
purple bristles that project from the flowering head.
- Habitat: Stream banks, low woods, damp thickets, wet meadows.
- Habit: Coarse perennial herb with thickened rootstocks.
- Stems: Upright, stout, rough-hairy to nearly smooth, up to 9 feet tall.
- Leaves: Alternate, simple, elliptic to narrowly lanceolate, pointed at the tip, tapering to the base,
toothed, smooth or hairy on the upper surface, short-hairy on the lower surface, up to 10 inches
long, up to 1 inch wide.
- Flowers: 20-65 in a head, with several heads in terminal corymbs, each head up to 1/2 inch
high, with numerous black or dark purple bristles protruding from the head.
- Sepals: 0.
- Petals: 5, purple, united to form a tube.
- Stamens: 5.
- Pistils: Ovary inferior.
- Fruits: Achenes cylindrical, up to 1/6 inch long, with short, stiff hairs, with a purplish tuft of
hairs at the tip.
Previous Species -- Wrinkled Goldenrod (Solidago rugosa)
Return to Species List -- Group 8
Next Species -- Northern White Violet (Viola pallens)