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

Phacelia lyallii (A. Gray) Rydb.
Lyall's phacelia (alpine phacelia)
Hydrophyllaceae (Waterleaf family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #66760)

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Distribution of Phacelia lyallii
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Species Information

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Perennial herb from a branched stem-base and a taproot; stems ascending to erect, numerous, long-hairy when flowering otherwise greenish, sparsely stiff-hairy to conspicuously or scarcely glandular, 10-25 cm tall.
Basal leaves oblanceolate in outline, stalked, 5-10 cm long, coarsely pinnatifid or coarse-toothed, the lobes broadly oblong or lanceolate, sparsely stiff-hairy and conspicuously or scarcely glandular; stem leaves similar, alternate, slightly reduced, becoming unstalked and clasping upwards.
Inflorescence a coiled, 1-sided, short, dense, terminal cluster; corollas blue-purple, deciduous, 5-9 mm long, hairy inside and out; calyces hairy, the lobes linear; stamens strongly exserted, 1.5-2.5 times as long as the corolla.
Capsules, 2-chambered; seeds 8-18, black, oblong, pitted.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry scree slopes and cliffs in the alpine zone; rare in extreme SE BC; E to SW AB and S to ID and W MT.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Phacelia 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) 1170 2258 2562
Slope Gradient (%) 0 38 82
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
25 130 320
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 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(14), ESSF(2), ICH(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.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References