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Croptilon hookerianum var. hookerianum

Croptilon hookerianum (Torr. & A. Gray) House var. hookerianum

Hooker's Scratchdaisy

Asteraceae (Aster Family)

Synonym(s): Croptilon divaricatum var. hookerianum, Haplopappus divaricatus var. hookerianus, Haplopappus validus ssp. torreyi, Isopappus hookerianus


USDA Native Status: L48 (N)

The species and the variety of this plant are named for William Jackson Hooker (1785-1865), who was Director of Kew Gardens from 1841-1865. He wrote "Flora boreali-americana" and many other works. He was founder and editor of "Journal of Botany".


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Plant Characteristics

Duration: Annual
Habit: Herb
Size Notes: Up to about 4 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: Jul , Aug , Sep , Oct



Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

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


Record Modified: 2023-03-02
Research By: TWC Staff

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