Gayophytum diffusum
Diffuse gayophytum
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Family: Onagraceae · Type: Herb · Native
Gayophytum diffusum (Diffuse gayophytum) is a native California herb in the Onagraceae family, recognized by NONE sympatric - geographically isolated from all congeners.
Diffuse gayophytum is a California native annual found in open woodlands and grasslands, typically growing at moderate elevations across California. Flowering from April to August, this delicate plant produces small white to pink flowers with petals arranged in branching clusters. Growing with slender stems up to 60 centimeters tall that fork and branch, particularly near the base, it has a lightweight and spreading growth habit. Its leaves are relatively small, measuring 1 to 6 centimeters long and becoming progressively reduced toward the stem's upper portions. The fruit develops as a cylindric capsule 3 to 15 millimeters long, which can be slightly bumpy or knobby in texture.
Identification and appearance
Key characters: NONE sympatric - geographically isolated from all congeners
Habitat and range
California counties: Los Angeles, San Bernardino, Tulare, Riverside, Mono, Placer, El Dorado, Inyo, Fresno, Shasta, Lassen, Tuolumne, Humboldt, Amador, Ventura, Mariposa, Lake, San Benito, Siskiyou, Kings, Sierra, Nevada, Mendocino, Madera, Calaveras, San Diego, Tehama
How to tell it apart
vs Epilobium: Gayophytum is a wiry, much-branched annual with tiny flowers and short straight capsules whose seeds lack plumes; Epilobium has long linear capsules that split to release seeds tufted with hairs (coma).; vs Camissonia: Gayophytum has a very short or absent floral tube, so the petals appear to sit right on the ovary; the Camissonia group has a distinct floral tube above the ovary and generally yellow flowers.; vs Oenothera: Gayophytum is a slender diffuse annual with minute (1-2 mm) flowers; Oenothera (evening primrose) has large showy flowers on a long floral tube.; vs Clarkia: Gayophytum flowers are tiny with plain entire petals; Clarkia has larger, often lobed or clawed petals and 4-grooved capsules.; vs Eremothera: Gayophytum has a threadlike branching habit with short capsules held along the stem; Eremothera and Chylismia have basal rosette leaves and longer tubular-based flowers.
Frequently asked questions
Is Gayophytum diffusum native to California?
Yes. Gayophytum diffusum is native to California (recorded as native).
Where in California does Gayophytum diffusum grow?
Gayophytum diffusum occurs in Los Angeles, San Bernardino, Tulare, Riverside, Mono, Placer, El Dorado, Inyo and other counties.
What plant family does Gayophytum diffusum belong to?
Gayophytum diffusum is in the Onagraceae family, genus Gayophytum.
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.