[Hawkweeds of the Columbia River Gorge of Oregon and Washington]

Common Hawkweed, English Hawkweed, European Hawkweed

Hieracium lachenalii

Synonyms: Hieracium acuminatum, Hieracium vulgatum

Common Hawkweed, English Hawkweed, European Hawkweed: Hieracium lachenalii (Synonyms: Hieracium acuminatum, Hieracium vulgatum)

The photo above shows a dense patch of common hawkweed at the springs at the end of the nature trail at Conboy National Wildlife Refuge.......mid June, 2000.

Inflorescence of Common Hawkweed, English Hawkweed, European Hawkweed: Hieracium lachenalii (Synonyms: Hieracium acuminatum, Hieracium vulgatum)The photo at right shows a closeup of the flower heads and spreading hairs to be seen on the upper stem and within the inflorescence.
Characteristics:

Common hawkweed is a weedy species with erect stems arising from rosettes of basal leaves. This species lacks stolons which help propagate the species asexually, and rather has a short rhizome. The herbage has star-like hairs scattered amongst the longer bristles. The leaves that are found on the stems are much reduced in size. The leaves are generally long-hairy or bristly with the lower leaves often greater than 12 cm long. The basal leaves usually taper abruptly to the petiole. The leaves are thin with some or all having a few coarse teeth.

The numerous dandylion-like flower heads are at the upper tip of the stems. The heads contain 40-80 ray flowers which are yellow in color.


Habitat:

Common hawkweed may be found in disturbed soils.


Range:

Common hawkweed is an introduced, weedy species from Europe. It has been found near Portland, OR and is expected at other sites on the west side of the Cascades.

In the Columbia River Gorge it may be found west of the Little White Salmon River between the elevations of 100'-3400'


.Leaves of Common Hawkweed, English Hawkweed, European Hawkweed: Hieracium lachenalii (Synonyms: Hieracium acuminatum, Hieracium vulgatum)

Common Hawkweed, English Hawkweed, European Hawkweed: Hieracium lachenalii (Synonyms: Hieracium acuminatum, Hieracium vulgatum)

Close-up images of the leaves of young plants of common hawkweed as seen along the fire road above the equestrian trailhead at Beacon Rock State Park..........May 14, 2014.

Paul Slichter