Senecio triangularis Hook.
arrow-leaved groundsel (arrowleaf ragwort; arrow-leaved ragwort)
Asteraceae (Aster family)
Introduction to Vascular Plants
arrow-leaved groundsel (arrowleaf ragwort; arrow-leaved ragwort)
Asteraceae (Aster family)
Introduction to Vascular Plants
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Species Information
General:
Perennial herb from a fibrous-rooted, woody stem-base or rhizome; stems erect, solitary or few, branched above, glabrous to sparsely short-hairy above, 0.2-1.5 m tall.
Leaves:
Basal leaves triangular to heart-shaped, squared-off at the base; strongly toothed, stalked, 2.5-10 cm long including the stalks, 0.4-4.5 cm wide, hairless except for short hairs on the veins beneath, sometimes deciduous by flowering time; stem leaves similar, larger, 2.5-25 cm long, 0.4-8.5 cm wide, gradually reduced upwards, becoming unstalked.
Flowers:
Heads with ray and disk flowers, few to more often numerous on sparsely hairy stalks in a short, flat-topped inflorescence; involucres 7-12 mm tall; involucral bracts lanceolate, conspicuously black-tipped, sometimes also sparsely hairy or rarely with inconspicuous unstalked glands at the tips; bracteoles conspicuous, black-tipped, hairy; ray fowers yellow, mostly 7-14 mm long; disk flowers yellow.
Fruits:
Achenes oblong, faintly ribbed, 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
USDA Species Characteristics
Flower Colour:
Yellow
Blooming Period:
Mid Summer
Fruit/Seed characteristics:
Colour: Brown
Present over the Fall
Source: The USDA
Ecology
Ecological Framework for Senecio triangularis
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) |
1568 | 3 | 2640 |
| Slope
Gradient (%) |
16 | 0 | 420 |
|
Aspect (degrees) |
160 | 0 | 360 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
5 | 0 | 8 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
3672 | ||
| Modal
BEC Zone Class |
ESSF | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
AT(72), BAFA(108), BWBS(15), CMA(6), CWH(31), ESSF(2363), ICH(201), IDF(18), IMA(35), MH(69), MS(202), SBPS(2), SBS(237), SWB(88) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Moist to mesic meadows, streambanks, avalanche tracks and forest openings from the lowland to lower alpine zones; common throughout BC; N to S AK, S YT and SW NT, E to SK and S to NM and CA.Status Information
Synonyms
Synonyms and Alternate Names:
Senecio gibbsonsii Greene
Senecio triangularis var. angustifolius G.N. Jones