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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 occidentale (Cobwebby thistle)
Bransford, W.D. and Dolphia

Cirsium occidentale

Cirsium occidentale (Nutt.) Jeps.

Cobwebby Thistle

Asteraceae (Aster Family)

Synonym(s):

USDA Symbol: CIOC

USDA Native Status: L48 (N)

 

From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Biennial
Habit: Herb
Size Notes: Up to about 12 feet tall, often much shorter.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: White , Pink , Purple
Bloom Time: Feb , Mar , Apr , May , Jun , Jul , Aug , Sep

Distribution

USA: CA , OR

Growing Conditions

Light Requirement: Sun , Part Shade

Value to Beneficial Insects

Special Value to Native Bees
Special Value to Bumble Bees
Provides Nesting Materials/Structure for Native Bees

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.

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

Metadata

Record Modified: 2022-12-23
Research By: TWC Staff

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