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

Introduction to Vascular Plants


© Virginia Skilton     (Photo ID #25625)


E-Flora BC Static Map

Distribution of Boechera lyallii
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Species Information

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).

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.


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)
2104 700 2563
Slope Gradient (%)
49 0 140

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

149 12 355
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 0 7
Modal Nutrient Regime
# 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)

Habitat and 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.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Arabis armerifolia Greene
Arabis densa Greene
Arabis lyallii S. Watson