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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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Pleiacanthus spinosus

Pleiacanthus spinosus (Nutt.) Rydb.

Thorn Skeletonweed, Thorny Skeletonweed

Asteraceae (Aster Family)

Synonym(s): Lygodesmia spinosa, Stephanomeria spinosa

USDA Symbol: PLSP7

USDA Native Status: L48 (N)


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Plant Characteristics

Duration: Perennial
Habit: Herb , Subshrub
Size Notes: Up to about 20 inches tall.
Flower: Ligulate (strap-shaped) florets.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: Pink , Violet
Bloom Time: Jun , Jul , Aug , Sep


USA: AZ , CA , ID , MT , NV , OR , UT

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

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


Record Modified: 2019-05-17
Research By: CBR

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