Crepis tectorum (Narrow-Leaved Hawk's-Beard) - photos and description

Crepis tectorum
15 cm ruler for scale

Crepis tectorum

Crepis tectorum

Crepis tectorum

Crepis tectorum

Crepis tectorum
Lower stem leaf in above photo

Crepis tectorum
Upper stem leaf in above photo

General: Annual plant with an erect, slender, branching growth habit. Stems pubescent. Listed as noxious weed in some provinces.

Flowers: Flower heads yellow, comprised of only ray florets, ray florets toothed at apex. We measured a flower head at 2.5 cm wide. Involucre with two rows, inner row is linear.

Leaves: Basal leaves usually absent when plant is flowering. Leaves alternate, sessile, linear, lowest stem leaves with a few teeth. We measured a lower stem leaf at 45 mm long and 7 mm wide, and an upper stem leaf at 40 mm long and 3 mm wide. Leaves top and bottom puberulent.

Height: Height listed in Budd's Flora to 50 cm, we measured plants to 66 cm tall.

Habitat: Roadsides and waste ground, parklands and boreal forest.

Abundance: Common.

Origin: Introduced.

When and where photographed: Photos taken July 10th in a gravel pit, Meadow Lake Provincial Park, 550 km northwest of our home in Regina, SK.