Eriogonum diclinum
Jaynes canyon buckwheat
(c) Dee Shea Himes, some rights reserved (CC BY) · licence
Family: Polygonaceae · Type: Subshrub · Native
Conservation status: CNPS 2B.3
Eriogonum diclinum (Jaynes canyon buckwheat) is a native California subshrub in the Polygonaceae family, recognized by dioecious habit is unique among California Eriogonum species.
Jaynes canyon buckwheat is a rare (CNPS 2B.3) California native perennial found in the Klamath Ranges of Siskiyou and Trinity counties, growing on serpentine landscapes at elevations of 1,700 to 2,400 meters. Flowering from June to September, this plant produces yellow to brown-yellow flowers in small head-like clusters. Growing as a low mat spreading 3 to 8 meters in diameter, it forms erect stems 10 to 20 centimeters tall with sparse tomentose covering. Its basal leaves are densely gray-tomentose, measuring 5 to 20 millimeters long and 5 to 15 millimeters wide, creating a distinctive silvery appearance. The plant is dioecious, with male and female flowers differing subtly in size and structure.
Identification and appearance
Key characters: 45 sympatric species; dioecious habit is unique among California Eriogonum species
Habitat and range
Habitat: Serpentine
Elevation: 1700-2400 m
California counties: Siskiyou, Trinity
Outside California: southwestern Oregon
Bloom period
Eriogonum diclinum blooms Jun-Sep.
Conservation status
CNPS 2B.3
How to tell it apart
vs Adenostoma: Eriogonum has flowers in cup-like involucres; Adenostoma has tiny white rose-family flowers in spikes.; vs Salvia: Eriogonum has six similar perianth parts; Salvia has two-lipped tubular flowers.; vs Fagopyrum: Eriogonum has flowers in involucred clusters; Fagopyrum has loose branching sprays without involucres.; vs Artemisia: Eriogonum has cup-surrounded flower clusters; Artemisia has tiny inconspicuous heads in drooping sprays.; vs Chorizanthe: Eriogonum has multiple flowers per involucre; Chorizanthe has one flower per involucre with spiny teeth.
Frequently asked questions
Is Eriogonum diclinum native to California?
Yes. Eriogonum diclinum is native to California (recorded as native).
When does Eriogonum diclinum bloom?
Eriogonum diclinum blooms Jun-Sep.
Where in California does Eriogonum diclinum grow?
Eriogonum diclinum occurs in Siskiyou, Trinity, at elevations of 1700-2400 m.
What plant family does Eriogonum diclinum belong to?
Eriogonum diclinum is in the Polygonaceae family, genus Eriogonum.
Is Eriogonum diclinum rare or endangered?
Eriogonum diclinum carries California Rare Plant Rank 2B.3, state rank S3.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CNPS Rare Plant Inventory · Index of California Plant Names · CalPhotos · CDFW CNDDB
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.