Packera pauciflora (Pursh) Á. Löve & D. Löve
rayless alpine butterweed
Asteraceae (Aster family)
Introduction to Vascular Plants
rayless alpine butterweed
Asteraceae (Aster family)
Introduction to Vascular Plants
Species Information
General:
Perennial herb from a fibrous-rooted, simple or slightly branched woody stem-base; stems erect, solitary or several, simple or few-branched above, glabrous or nearly so, 10-50 cm tall.
Leaves:
Basal leaves thick, succulent, elliptic, egg-shaped or nearly round, stalked, 1.5-10 cm long including the stalk, 1-4 cm wide, glabrous to sparsely white woolly-hairy, toothed; stem leaves similar, lanceolate, variously toothed, cleft or lobed, progressively reduced upwards, becoming unstalked.
Flowers:
Heads discoid, solitary to several at the tips of stems or branches; involucres 6-10 mm tall; involucral bracts linear-lanceolate, reddish-purple throughout or at least above the middle, rarely green, glabrous or sparsely hairy; bracteoles few, purplish; discoid or rarely short and yellow; disk flowers orange or reddish.
Fruits:
Achenes oblong, nerved, glabrous; pappus of white hairlike bristles.
Illustration
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.
Illustration Source: The Illustrated Flora of British Columbia
Ecology
Ecological Framework for Packera pauciflora
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)
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) |
1457 | 71 | 2390 |
| Slope
Gradient (%) |
12 | 0 | 100 |
|
Aspect (degrees) |
206 | 5 | 360 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
4 | 1 | 8 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
226 | ||
| Modal
BEC Zone Class |
ESSF | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
AT(9), BAFA(8), BWBS(14), ESSF(73), ICH(14), IDF(10), IMA(3), MH(1), MS(35), SBPS(7), SBS(23), SWB(22) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Wet to moist meadows in the subalpine and alpine zones; common throughout BC, lacking on the Queen Charlotte Islands; E to NF and S to WY and CA.Status Information
Synonyms
Synonyms and Alternate Names:
Senecio discoideus (Hook.) Britton
Senecio pauciflorus Pursh