WHERE’S WILDLIFE • WILDFLOWER FIELD GUIDE

Nodding Thistle

Carduus nutans

Pronounced (approximate): KAR-doo-us NOO-tanz

Large purple flower heads often tilt downward. Broad overlapping bracts spread into sharp points.

Nodding Thistle (Carduus nutans): flower details. Tap the photo to open the gallery.

NON-NATIVE • NORTH AMERICA

At a glance

Family Asteraceae
Life cycle Biennial
Blooms June–October
Height 2 to 7 feet
Habitat sun; fields, along roads

Common names: Nodding Thistle

Bloom timing varies with latitude, weather and local conditions.

Sightings map

Explore reported observations. Sightings are not a complete range map.

How to recognize it

Key identification clues

  • Large purple flower heads often tilt downward.
  • Broad overlapping bracts spread into sharp points.
  • Winged stems and lobed leaves are strongly spiny.

Where and when to look

sun; fields, along roads. Flowering season: June–October.

Compare similar plants

Bull Thistle has a different, narrower bract arrangement. Nodding Thistle has broad overlapping pointed bracts and often drooping heads.

A closer look

Flower details

Large purple flower heads often tilt downward.

Leaves & stems

Broad overlapping bracts spread into sharp points.

Whole plant & habitat

Winged stems and lobed leaves are strongly spiny. Pair close views with a photograph of the whole plant.

Field photographs

14 field photographs. Select a photograph to enlarge it; use Load more photos to see the rest.

Range & sightings

Introduced in North America; native to Europe.

Reported U.S. distribution
AL, AR, AZ, CA, CO, GA, IA, ID, IL, IN, KS, KY, LA, MD, MN, MO, MS, MT, NC, ND, NE, NJ, NM, NV, NY, OH, OK, OR, PA, SC, SD, TN, TX, UT, VA, WA, WI, WV, WY

Includes native and introduced state records where listed; a state record does not imply occurrence in every county.

Observation maps show submitted records, not every place the plant occurs. Follow local access rules when visiting a site.

Keep learning

Practice recognizing Nodding Thistle in the flower quiz, or compare it with other plants in the guide.

Sources & further reading

Field photographs: Where’s Wildlife.

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