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Hymenoxys hoopesii (Owl's-claws)
Reveal, James L.

Hymenoxys hoopesii

Hymenoxys hoopesii (A. Gray) Bierner

Owl's-claws, Orange Sneezeweed

Asteraceae (Aster Family)

Synonym(s): Dugaldia hoopesii, Helenium hoopesii


USDA Native Status: L48 (N)

A stout, 1-3 ft. perennial with large, yellow, daisy-like flowers in loose clusters. The foliage is yellow-green - large at the base, becoming reduced upward.

The round, deep yellow flower heads with rays hanging around the edge distinguish this and other plants of the genera Helenium and Hymenoxys that are commonly known as sneezeweeds. The heads of some species are much smaller, and the way their leaves are arrayed along the stem varies. The common name sneezeweed, is equally correct for Hymenoxys or Helenium species.


From the Image Gallery

67 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Size Notes: 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: Yellow
Bloom Time: May , Jun , Jul , Aug , Sep , Oct , Nov


USA: AZ , CA , CO , ID , MT , NM , NV , OR , UT , WY
Native Distribution: C. CA, to NM & WY; also s. OR & Beaverhead Co., MT
Native Habitat: High elevation meadows, streambanks & wet slopes

Growing Conditions

Light Requirement: Part Shade
Soil Moisture: Wet
Soil Description: Moist to wet soils.


Commercially Avail: yes

Find Seed or Plants

Find seed sources for this species at the Native Seed Network.

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Santa Barbara Botanic Garden - Santa Barbara, CA
Native Seed Network - Corvallis, OR

Web Reference

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

Additional resources

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


Record Modified: 2022-12-29
Research By: TWC Staff

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