Host an Event Volunteer Join Tickets

Support the plant database you love!


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.

Enter a Plant Name:
Or you can choose a plant family:
Helianthemum bicknellii (Hoary frostweed)
Smith, R.W.

Helianthemum bicknellii

Helianthemum bicknellii Fernald

Hoary Frostweed, Bicknell's Hoary Rock-rose, Bicknell's Rock-rose, Plains Frostweed

Cistaceae (Rock-Rose Family)

Synonym(s): Crocanthemum bicknellii, Crocanthemum majus

USDA Symbol: HEBI2

USDA Native Status: L48 (N), CAN (N)


From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb , Subshrub
Fruit Type: Capsule
Size Notes: Up to about 2 feet tall.

Bloom Information

Bloom Color: Yellow
Bloom Time: Jun , Jul


USA: AR , CO , CT , DE , GA , IA , IL , IN , KS , KY , MA , MD , ME , MI , MN , MO , NC , ND , NE , NH , NJ , NY , OH , PA , RI , SD , TN , VA , VT , WI , WV , WY
Canada: MB , ON

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 26 - Minnesota Wildflowers: a field guide to the flora of Minnesota (2009)
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

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


Record Modified: 2022-11-10
Research By: Joseph A. Marcus

Go back