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

Ionactis stenomeres (A. Gray) Greene
Rocky Mountain aster
Asteraceae (Aster family)

Introduction to Vascular Plants

© Curtis Bjork  Email the photographer   (Photo ID #15765)

E-Flora BC Static Map
Distribution of Ionactis stenomeres
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Perennial herb from a fibrous-rooted, branched, woody stem-base; stems ascending to erect, simple, long-hairy, 13-30 cm tall.
Leaves:
Basal leaves few, soon deciduous; stem leaves reduced below, the others uniform except for the reduced uppermost ones, linear with spiny tips, 1.5-4.0 cm long, 1-4 mm wide, unstalked, short, appressed-hairy, entire.
Flowers:
Heads with ray and disk flowers, solitary; involucres 8-13 mm tall; involucral bracts graduated, linear to lance-linear, with long-pointed tips, fine appressed-hairy with a greenish or sometimes purplish midline and more or less papery margin; ray flowers 13, sometimes more, violet, 10-20 mm long; disk flowers yellow.
Fruits:
Achenes several-nerved, with stalked glands and fine hairs; pappus straw-colored, double, the outer bristles as much as 1 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry gravelly or rocky slopes in the steppe and montane zones; infrequent in SE BC; S to MT, ID and NE WA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Ionactis stenomeres

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

Minimum

Average

Maximum

Elevation (metres) 1008 1617 2179
Slope Gradient (%) 0 19 37
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
70 166 229
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 4
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
10
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: ESSF(6), IDF(2), MS(1), PP(1)

Climate

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

Aster stenomeres A. Gray

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References