Smooth Ironweed

vernonia fasciculata

Smooth Ironweed is a robust and striking native North American perennial wildflower, famous for its vivid, intense purple blooms that emerge in late summer. Reaching heights of up to six feet, this resilient plant is a staple of wet prairies, sedge meadows, and river floodplains across the Midwestern United States. Its common name, ironweed, pays homage to its incredibly tough, fibrous stems, which successfully withstand strong prairie winds and discourage grazing animals. Gardeners and conservationists prize it for its ability to attract a wide diversity of pollinators, acting as an ecological anchor in tallgrass prairie restorations.

Lebensraum: Typically found in moist to wet prairies, marshes, sedge meadows, and river floodplains.

Aussehen

This tall perennial stands upright on stiff, smooth, reddish-purple stems that are entirely hairless. Its lance-shaped leaves are arranged alternately, featuring sharply toothed margins and distinctive tiny pits on their hairless undersides. In late summer, the plant is topped by flat, dense clusters of bright magenta to deep purple flower heads, each composed entirely of disk florets with no rays, which eventually give way to rusty-brown seed heads.

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Smooth Ironweed

Kategorie

Pflanzen

Seltenheit

Common

Gefahr

1/5 · Sehr gering

Snaps

Mach den ersten Snap!

Interessante Fakten

Because livestock avoid its bitter taste, Smooth Ironweed often becomes dominant in overgrazed pastures, earning it a reputation as a stubborn weed among ranchers.

The common name 'Ironweed' refers not only to the tough, metallic-colored stems but also to the rusty-brown color of the seed heads in autumn.

The genus name Vernonia honors the English botanist William Vernon, who conducted extensive plant collections in Maryland during the late 17th century.

Besondere Fähigkeiten

The exceptionally tough, fibrous stems allow the plant to remain upright in severe storms and high prairie winds.

Leaves contain bitter chemical compounds that make the plant unpalatable to cattle and deer, ensuring its survival in heavily grazed areas.

Blooms late in the season when many other flowers have faded, providing a critical nectar source for migrating butterflies.

Maße und Details

Länge: 90-180 cm
Lebenserwartung: 3-10 Jahre

Ernährung und Fütterung

As a photoautotrophic plant, Smooth Ironweed synthesizes its own food using sunlight, carbon dioxide, and water through the process of photosynthesis.

Hauptnahrung

Sunlight
Carbon dioxide
Water
Soil nutrients

Ökologische Zusammenhänge

mutualism

Monarch Butterfly

Danaus plexippus

Provides vital late-season nectar to migrating adults during their southern journey.

eaten by

Ironweed Borer Moth

Papaipema impecuniosa

Larvae of this specialist moth bore into the stems of the plant to feed and pupate.

mutualism

Long-horned Bee

Melissodes dentiventris

Feeds heavily on the pollen and nectar, acting as an effective pollinator.

Merkmale

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Sicherheit

Gefahr

1/5 · Sehr gering

Noch keine besonderen Sicherheitshinweise.

Häufig gestellte Fragen

Wie identifiziert man Smooth Ironweed?

Der einfachste Weg, Smooth Ironweed zu bestimmen, ist die Verwendung der Naturführer-App Snappit.

Was ist der/die/das länge von Smooth Ironweed?

90-180 cm

Was ist der/die/das lebenserwartung von Smooth Ironweed?

3-10 Jahre

Was frisst Smooth Ironweed?

As a photoautotrophic plant, Smooth Ironweed synthesizes its own food using sunlight, carbon dioxide, and water through the process of photosynthesis.

Wo findet man Smooth Ironweed normalerweise?

Typically found in moist to wet prairies, marshes, sedge meadows, and river floodplains.