Native Plants

Plant Database

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Marcus, Joseph A.

Cirsium horridulum var. horridulum

Cirsium horridulum Michx. var. horridulum

Horrid Thistle, Yellow Thistle

Asteraceae (Aster Family)

Synonym(s): Carduus pinetorum, Carduus smallii, Carduus spinosissimus, Cirsium horridulum var. elliottii, Cirsium smallii, Cirsium spinosissimum

USDA Symbol: CIHOH

USDA Native Status: L48 (N)

From the Image Gallery

14 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual , Biennial
Habit: Herb
Size Notes: Up to about 6 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: White , Yellow , Purple
Bloom Time: Apr , May , Jun

Distribution

USA: AL , AR , CT , DE , FL , GA , LA , MA , MD , ME , MS , NC , NH , NJ , NY , OK , PA , RI , SC , TN , TX , VA

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

USDA: Find Cirsium horridulum var. horridulum in USDA Plants
FNA: Find Cirsium horridulum var. horridulum in the Flora of North America (if available)
Google: Search Google for Cirsium horridulum var. horridulum

Metadata

Record Modified: 2022-12-23
Research By: CBR

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