Mentzelia laevicaulis (Hook.) Torr. & A. Gray
Smoothstem Blazingstar, Giant Blazingstar, Evening Star, Stick Leaf
Loasaceae (Loasa Family)
USDA Symbol: MELA2
This biennialís first year taproot carries a low, broad mound of rough, gray-green, coarsely toothed leaves. The second year, a 4-5 ft. flowering stalk branches out candelabra-fashion with dozens of large, yellow, starry flowers. Each flower is filled with long bunches of yellow stamens and opens from late afternoon until early morning.
There are many species of Mentzelia in the West. They are commonly called Stickleaf because of the leaves' barbed hairs that readily cling to fabric.
From the Image Gallery
Plant CharacteristicsDuration: Biennial
Fruit Type: Capsule
Size Notes: Up to about 5 feet tall.
Bloom InformationBloom Color: Yellow
Bloom Time: May , Jun , Jul , Aug , Sep , Oct , Nov
DistributionUSA: CA , CO , ID , MT , NV , OR , UT , WA , WY
Native Distribution: Dry areas from s.c. B.C. to s. CA, e. to MT, WY & UT
Native Habitat: Sandy, gravelly or talus-covered slopes of mt. canyons
Growing ConditionsLight Requirement: Sun
Soil Description: Gravelly or sandy soils.
Value to Beneficial InsectsSpecial Value to Native Bees
Special Value to Bumble Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationDescription: Propagate by seeds.
Seed Treatment: Germination is enhanced if seeds are soaked prior to sowing, however seeds of this species will germinate without pretreatment.
Commercially Avail: yes
Find Seed or Plants
Find seed sources for this species at the Native Seed Network.
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Native Seed Network - Corvallis, OR
Web ReferenceWebref 37 - Calscape (2019) California Native Plant Society
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 resourcesUSDA: Find Mentzelia laevicaulis in USDA Plants
FNA: Find Mentzelia laevicaulis in the Flora of North America (if available)
Google: Search Google for Mentzelia laevicaulis
MetadataRecord Modified: 2023-02-20
Research By: TWC Staff