Page authors: Don Knoke, David Giblin
Tonestus lyallii
Lyall's goldenweed, Lyall's serpentweed
WTU specimens
Other herbaria

Distribution: Occurring in the Olympics and Cascades mountains in Washington; British Columbia south to California, east to Alberta, south to Colorado.

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

Flowers: July-September

Origin: Native

Conservation Status: Not of concern

Description:
General:

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:

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.

Flowers:

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.

Fruits:

Achenes elongate.

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

E-Flora BC: Tonestus lyallii atlas page.

CalPhotos: Tonestus lyallii photos.

USDA Plants: Tonestus lyallii information.

17 photographs:
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