Bellardia viscosa
Yellow glandweed
(c) Mark Breaks, some rights reserved (CC BY) · licence
Family: Orobanchaceae · Type: Herb · Not Native
Conservation status: Cal-IPC Yes
Bellardia viscosa (Yellow glandweed) is a non-native California herb in the Orobanchaceae family.
Yellow glandweed is a naturalized annual found in northern California coastal regions, northern California valleys, and central California foothills in damp, grassy places at elevations generally below 650 meters. Flowering from April to October, this sticky plant produces bright yellow flowers 15 to 25 millimeters long in dense clusters. Growing with generally unbranched stems up to 110 centimeters tall, it has a distinctive glandular and sticky appearance. Its lanceolate leaves range from 20 to 50 millimeters long, with edges that are crenate to serrate. The fruit is strigose and 6 to 10 millimeters long, containing tiny seeds approximately 0.2 to 0.3 millimeters in size.
Identification and appearance
Key characters: #N/A
Habitat and range
Habitat: Damp, grassy places
Elevation: generally < 650(1220) m
California counties: Humboldt, Sonoma, Yuba, Del Norte, Mendocino, Butte, San Mateo, Sacramento, Amador, Placer, Tuolumne, Contra Costa, Nevada, Shasta, Napa, Lake, Solano, Marin
Outside California: to British Columbia; native to Europe, widely distributed as weed
Bloom period
Bellardia viscosa blooms Apr--Oct.
Conservation status
Cal-IPC Yes
How to tell it apart
#N/A
Frequently asked questions
Is Bellardia viscosa native to California?
No. Bellardia viscosa is not native to California (recorded as not native).
When does Bellardia viscosa bloom?
Bellardia viscosa blooms Apr--Oct.
Where in California does Bellardia viscosa grow?
Bellardia viscosa occurs in Humboldt, Sonoma, Yuba, Del Norte, Mendocino, Butte, San Mateo, Sacramento and other counties, at elevations of generally < 650(1220) m.
What plant family does Bellardia viscosa belong to?
Bellardia viscosa is in the Orobanchaceae family, genus Bellardia.
Is Bellardia viscosa invasive in California?
Bellardia viscosa is listed by Cal-IPC with an invasiveness rating of Yes.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.