Grindelia ×paludosa
Suisun gumplant, Suisun Gumplant
(c) Alan Rockefeller, some rights reserved (CC BY), uploaded by Alan Rockefeller · licence
Family: Asteraceae · Type: Perennial · Native
Grindelia ×paludosa (Suisun gumplant) is a native California perennial in the Asteraceae family.
Suisun gumplant is a California native perennial found in the Suisun Marsh delta region in salt marshes and slough banks at elevations below 30 meters. Flowering from July to November, this plant produces yellow flowers in hemispherical heads 10 to 20 millimeters wide with distinctive phyllary tips that can be coiled or reflexed. Growing 80 to 200 centimeters tall with erect, widely branched stems, it forms an upright and open structure. Its leaves are lance-shaped, slightly fleshy, ranging from green to red-green, and can be entire or slightly serrated along the edges. The fruit is approximately 4 millimeters long with a truncate top and 2 to 5 short awns.
Identification and appearance
Key characters: Geographically isolated in Deltaic GV (Suisun), no sympatric species
Habitat and range
Habitat: Salt marshes, banks of sloughs
Elevation: < 30 m
Bloom period
Grindelia ×paludosa blooms Jul-Nov.
How to tell it apart
vs Heterotheca: Grindelia has sticky gummy bracts; Heterotheca has dry, non-sticky bracts and spreading hairs on stems.; vs Agoseris: Grindelia has ray and disc flowers; Agoseris has only strap-shaped ligulate flowers (dandelion-like).; vs Erigeron: Grindelia has gummy sticky bracts; Erigeron has dry bracts and typically 50+ very narrow rays.; vs Solidago: Grindelia has large sticky-bracted heads; Solidago has tiny non-sticky heads in dense branched clusters.; vs Deinandra: Grindelia bracts curl backward and are gummy; Deinandra has spine-tipped bracts and is a tarweed.
Frequently asked questions
Is Grindelia ×paludosa native to California?
Yes. Grindelia ×paludosa is native to California (recorded as native).
When does Grindelia ×paludosa bloom?
Grindelia ×paludosa blooms Jul-Nov.
What plant family does Grindelia ×paludosa belong to?
Grindelia ×paludosa is in the Asteraceae family, genus Grindelia.
What habitat does Grindelia ×paludosa grow in?
Grindelia ×paludosa grows in Salt marshes, banks of sloughs.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CalPhotos
Last updated 2026-09-30
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.