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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Cirsium quercetorum

Cirsium quercetorum (A. Gray) Jeps.

Alameda County Thistle, Brownie Thistle

Asteraceae (Aster Family)

Synonym(s): Cirsium quercetorum var. mendocinum, Cirsium quercetorum var. quercetorum, Cirsium quercetorum var. walkerianum, Cirsium quercetorum var. xerolepis, Cirsium walkerianum

USDA Symbol: CIQU2

USDA Native Status: L48 (N)

 

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Plant Characteristics

Duration: Perennial , Biennial
Habit: Herb
Size Notes: May form rounded mounds up to about 8 inches tall or erect plants up to about 3 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 , Purple
Bloom Time: Apr , May , Jun , Jul , Aug
Bloom Notes: No ray florets present, only disc florets.

Distribution

USA: CA

Web Reference

Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

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

Metadata

Record Modified: 2018-12-11
Research By: CBR

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