Hieracium aurantiacum (Orange Hawkweed) - photos and description


Basal leaf in above photo. 

Stem leaf in above photo.


General: Rhizomatous, hairy perennial, declared a noxious weed in several Canadian provinces.

Flowers: Flowerheads bright orange, showy, growing in a corymb. We measured a flowerhead at 20 mm in diameter. The calyx has black glandular hairs, and long white hairs. We observed two rows of overlapping bracts.

Leaves: Mostly basal, growing in a rosette. Basal leaves are linear-lanceolate to elliptical, with long white hairs. We measured a basal leaf at 6 cm long by 16 mm wide. Stem leaves 0 to 1, the stem leaf growing above the middle of the stem, appressed to the stem, lanceolate, we measured at stem leaf at 15 mm long by 4 mm wide.

Height: Budd's Flora lists the height to 50 cm, we measured plants to 46 cm tall.

Habitat: Fields and roadsides.

Abundance: Uncommon.

Origin: Introduced.

When and where photographed: Photos taken June 28th, wet roadside, grassy ditch, Moose Jaw, about 70 km west of our home in Regina, SK.