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

Hieracium albiflorum Hook.
white hawkweed
Asteraceae (Aster family)

Introduction to Vascular Plants

© Val George  Email the photographer   (Photo ID #86555)

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Distribution of Hieracium albiflorum
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Species Information

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Perennial herb from a woody root and often an unbranched, short stem-base; stems erect, usually solitary, branched above, loosely bristly-hairy at least at the base, becoming glabrous upwards, exuding a milky juice when broken, 0.3-1.2 m tall.
Basal leaves oblanceolate, narrowed to a stalk, 4-25 cm long, 1.2-4.5 cm wide, sparsely or moderately bristly-hairy or the upper nearly glabrous, entire or wavy-toothed, persistent and often tufted; stem leaves lacking, or if present few, unstalked and reduced.
Heads with strap-shaped flowers, several or many on slender stalks in a round- to flat-topped inflorescence; involucres 6-11 mm tall; involucral bracts linear-lanceolate, scarcely graduated, greenish or blackish, glabrous or often sparsely glandular with pale or black hairs, sometimes with a few bristly hairs; ray flowers white.
Achenes narrowed at the base, several-ribbed, 2.5-3 mm long; pappus of many white to brownish bristles.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Late Spring
Fruit/Seed characteristics:
Colour: Brown
Present over the Summer
Source:  The USDA

Habitat / Range

Mesic to dry roadsides, fields, grasslands, shrublands and forests in the lowland, steppe and montane zones; common throughout BC; N to AK, YT and NT, E to SK and S to CO, UT and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Hieracium albiflorum

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




Elevation (metres) 0 1144 2450
Slope Gradient (%) 0 29 240
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 194 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: AT(2), BG(1), BWBS(14), CDF(22), CWH(78), ESSF(606), ICH(972), IDF(511), IMA(1), MH(3), MS(358), PP(9), SBPS(32), SBS(172), SWB(2)


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

Chlorocrepis albiflora (Hook.) W.A. Weber
Hieracium helleri Gandog.
Hieracium siskiyouense M. Peck

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References