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

Packera subnuda (de Candolle) Trock & T. M. Barkley var. subnuda
alpine meadow butterweed
Asteraceae (Aster family)

Introduction to Vascular Plants
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Distribution of Packera subnuda var. subnuda
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Species Information

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General:
Perennial herb from a fibrous-rooted short rhizome; stems erect or ascending, solitary, simple or rarely branched above, 4-30 cm tall, glabrous.
Leaves:
Basal leaves nearly circular, rounded or spoon-shaped, long-stalked, 1-11 cm long including the stalk, 0.3-2 cm wide, entire to coarsely toothed or sometimes lobed, glabrous; stem leaves few and reduced, oblong-spoon-shaped to lanceolate, uppermost reduced to entire, purplish-tipped bracts.
Flowers:
Heads with ray and disk flowers, usually solitary, rarely 2; involucres 5-11 mm tall; involucral bracts linear-lanceolate with long-pointed tips, purplish-tinged towards the tips, glabrous; bracteoles few, usually purplish-tipped; ray flowers yellow, 6-12 mm long; disk flowers yellow.
Fruits:
Achenes oblong, ribbed, glabrous; pappus of white hairlike bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to mesic streambanks, seepages and meadows from the upper montane to alpine zones; locally common in SC and SE BC; E to SW AB and S to WY and CA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Packera subnuda var. subnuda

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) 30 1417 2562
Slope Gradient (%) 0 22 120
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 3 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 3 8
Modal Nutrient Regime
Class
B
Number of field plots
 species was recorded in:
66
Modal BEC Zone Class
AT
All BEC Zones (# of stations/zone) species was recorded in: AT(19), BWBS(4), CMA(3), CWH(6), ESSF(12), ICH(2), IDF(3), MH(4), MS(1), SBPS(2), SBS(5)

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 alpine tundra & boreal.

Synonyms and Alternate Names

Senecio cymbalarioides Nutt., nom. illeg., non Senecio cymbalarioides H. Buek

Taxonomic and Nomenclatural Links

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General References