Page authors: Don Knoke, David Giblin
Tonestus lyallii
Lyall's goldenweed, Lyall's serpentweed

Distribution: Occurring in the Olympics and Cascades mountains in Washington; British Columbia to California, east to the Rocky Mountains.

Habitat: Mountain meadows and rocky slopes, subalpine and alpine.

Flowers: July-September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies, beetles, wasps


Perennial from a short, woody, branching base and creeping rhizomes, the several stems erect, 3-15 cm. tall, the herbage covered with short, fine, stalked glands.


Leaves oblanceolate to spatulate or oblong, the basal ones 1.5-7 cm. long and 4-12 mm. wide, the cauline leaves ample, only slightly reduced.


Heads solitary, cup-shaped; involucre 6-12 mm. high, its bracts sub-equal, green or somewhat papery, often purplish; rays 13-35, 6-ll mm. long, yellow and pistillate; disk flowers numerous, yellow.


Achenes elongate.

Accepted Name:
Tonestus lyallii (A. Gray) A. Nelson
Publication: Bot. Gaz. 37: 262. 1904.

Synonyms & Misapplications:
Haplopappus lyallii A. Gray [HC]
Additional Resources:

PNW Herbaria: Specimen records of Tonestus lyallii in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Tonestus lyallii checklist entry

OregonFlora: Tonestus lyallii information

E-Flora BC: Tonestus lyallii atlas page

CalPhotos: Tonestus lyallii photos

25 photographs:
Group by