E-Flora BC: Electronic Atlas of the Flora of British Columbia

Tonestus lyallii (A. Gray) A. Nelson
Lyall's goldenweed
Asteraceae (Aster family)

Introduction to Vascular Plants

© Vanessa Robinson  Email the photographer   (Photo ID #87002)

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Distribution of Tonestus lyallii
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Species Information

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Perennial herb from a poorly-developed taproot and branching, woody stem-base, often with creeping rhizomes as well; stems erect, several, simple, 3-15 cm tall.
Basal leaves oblanceolate to spoon-shaped or oblong, tufted, alternate, strongly glandular-hairy, 1.5-7 cm long, 4-12 mm wide; stem leaves similar, gradually reduced upwards.
Heads with ray and disk flowers, solitary; involucres 6-12 mm tall, bell-shaped; involucral bracts lanceolate, papery, sometimes leafy, subequal, glandular-hairy; ray flowers yellow, 13-35, 6-11 mm long; disk flowers yellow, 4-7 mm long.
Achenes elongate, 3-4 mm long, glabrous or softly-hairy; pappus of tawny hairlike bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry meadows, rocky slopes and fellfields in the subalpine and alpine zones; common in S BC in and E of the Coast-Cascade Mountains; E to SW AB and S to NV and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Tonestus lyallii

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 252 2198 2705
Slope Gradient (%) 0 27 74
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 158 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 6
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: AT(67), BAFA(5), ESSF(49), IMA(17), MS(1)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Haplopappus lyallii A. Gray

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References