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

Boechera lyallii S. Watson
jewelled suncress
Brassicaceae (Mustard family)

Introduction to Vascular Plants

© Virginia Skilton  Email the photographer   (Photo ID #25625)

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Distribution of Boechera lyallii
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Species Information

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Perennial herb from a branched stem-base; stems several, 10-25 cm tall, glaucous and glabrous throughout or with a few hairs toward base.
Basal leaves in a prominent rosette, lanceolate, entire or few-toothed, 1.5-3 cm long, 0.3-7 mm wide, gradually narrowed to a long, slender stalk, glaucous and glabrous; stem leaves unstalked, ear-like at the bases, 2-3 cm long, 5-8 mm wide, entire or few-toothed, glabrous and glaucous.
Racemes few-flowered, symmetric; petals 6-10 mm long, purple; sepals not bulging on one side at the base.
Siliques, erect, somewhat spreading from the axis of the inflorescence, 3-6 cm long, 2-3 mm wide; seeds about 2 mm long, with wings less than 0.5 mm long.
Arabis depauperata is tentatively placed here. It has been variously treated as a variety of A. lemmonii, as a synonym of A. microphylla and A. lyallii (Hitchcock et al. 1964, Rollins 1993), or as a separate species (Mulligan 1996).

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to mesic meadows, rock outcrops, scree slopes and talus slopes in the subalpine to alpine zones; frequent in S BC east of the Coast-Cascade Mountains; N to YT and S to CA and UT.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Boechera 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) 700 2104 2563
Slope Gradient (%) 0 49 140
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
12 149 355
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 7
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(10), BG(2), ESSF(41), ICH(1), IDF(1), IMA(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

Arabis armerifolia Greene
Arabis densa Greene
Arabis lyallii S. Watson

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References