Sisyrinchium idahoense E.P. Bicknell
Idaho blue-eyed-grass (Idaho blue-eyed grass)
Iridaceae (Iris family)

Introduction to Vascular Plants

Photograph

© Ryan Batten     (Photo ID #66951)


Map

E-Flora BC Static Map

Distribution of Sisyrinchium idahoense
Click here to view the full interactive map and legend

Species Information

General:
Perennial tufted herb from a fibrous root; stems simple or sometimes branched, flat, winged, 10-42 cm tall.
Leaves:
Mostly basal, the blades several, linear, 10-30 cm long, (0.5) 2-2.5 (4.5) mm wide, sheathing, the margins entire to fine-toothed, the tips long-pointed; stem leaves 1 or few at the nodes, similar to basal.
Flowers:
Inflorescence of 2 to 7 showy, erect to nodding flowers on slender, smooth to slightly glandular, 2- to 2.5-cm long stalks; flowers pale blue to purple or deep violet-purple, of 6 distinct, narrowly elliptic to oblanceolate segments, these similar, 1-1.5 (2) cm long, rounded to blunt, abruptly bristle-tipped, the tubes slightly inflated below, 1-2 mm long; bracts 2, unequal, the outer one usually exceeding the flowers; filaments fused about 1/3 their length; anthers (1) 1.3-2 (2.5) mm long, yellow.
Fruits:
Capsules, egg-shaped to globe-shaped, 4-5.5 (6.5) mm long; seeds numerous, globe-shaped to angled, black, (1) 1.3-1.8 mm wide.
Notes:
Two varieties occur in BC while a third, var. segetum, known from the nearby San Juan Islands in NW WA may be found in BC in the future.

1. Stems usually averaging at least 2 mm wide; perianth segments usually less than 1.5 cm long................... var. idahoense

1. Stems usually averaging less than 1.5 mm wide; perianth segments usually more than 1.5 cm long.

2. Outer bracts at least twice as long as inner bracts; perianth usually more than 1.8 cm long; stems less than 1.5 mm wide..................... var. macounii (Bickn.) Henderson

2. Outer bracts usually less than twice as long as the inner bracts; perianth 1.5-1.8 cm long; stems usually less than 1.2 mm wide...................... var. segetum (Bickn.) Henderson

SourceThe Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blue
Blooming Period:
Mid Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Spring to Summer
Source:  The USDA

Ecology

Ecological Framework for Sisyrinchium idahoense

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

Avg

Min

Max

Elevation (metres)
841 1 1150
Slope Gradient (%)
9 0 40

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

182 86 350
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 2 6
Modal Nutrient Regime
Class
D
# of field plots
 species was recorded in:
17
Modal BEC Zone Class
IDF

All BEC Zones (# of stations/zone) species was recorded in

BG(1), CDF(1), CWH(2), IDF(13)

Habitat and Range

Moist grassy meadows in the lowland, steppe and montane zones; var. idahoense - rare in S BC; var. macounii - rare on S Vancouver Island and the Gulf Islands; var. idahoense S to WY, ID and N CA; var. macounii - S to WA.

SourceThe Illustrated Flora of British Columbia