Hieracium amitsokense (Almq.) Dahlst. ex Omang:
Greenland (North America)

Hieracium ivigtutense (Almq.) Omang:
Greenland (North America)

Hieracium scholanderi Omang:
Greenland (North America)

Hieracium groenlandicum Arv.-Touv.:
Canada (North America)
Greenland (North America)

Hieracium vulgatum Fr.:
Canada (North America)
United States (North America)

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

The correct name for the species here called Hieracium vulgatum may be H. lachenallii C. C. Gmelin (E. Lepage 1971; E. G. Voss 1972–1996, vol. 3). Plants of H. groenlandicum (stems mostly piloso-hirsute and not stipitate-glandular, corolla lobes distally ciliate) are sometimes treated as distinct from H. vulgatum in a narrow sense (stems usually stipitate-glandular and not piloso-hirsute, corolla lobes not ciliate distally).

Plants 30–60(–100+) cm. Stems proximally piloso-hirsute (hairs 1–3+ mm), distally stellate-pubescent and stipitate-glandular, sometimes piloso-hirsute as well (hairs 1–2+ mm). Leaves: basal 3–8+, cauline 1–5+; blades (often purple-mottled) lance-elliptic to lanceolate, 50–100 × 10–50+ mm, lengths 2–5 times widths, bases usually cuneate, sometimes rounded to truncate, margins ± dentate or entire, apices acute, faces usually ± piloso-hirsute (at least near margins, hairs 1–3+ mm), sometimes glabrate. Heads (1–)3–9+ in corymbiform arrays. Peduncles stellate-pubescent and stipitate-glandular. Calyculi: bractlets 13–16+. Involucres ± obconic, 8–10 mm. Phyllaries ca. 21+, apices acute to acuminate, abaxial faces stellate-pubescent and stipitate-glandular. Florets 40–80+; corollas yellow, 13–18 mm. Cypselae columnar, 2.5–3 mm; pappi of 30–40+, stramineous bristles in ± 2 series, ca. 5 mm.

Hieracium amitsokense Dahlstedt; H. groenlandicum Arvet-Touvet; H. ivigtutense Omang; H. scholanderi Omang; H. sylowii Omang

In Great Britain and/or Ireland:
Foodplant / spot causer
embedded sorus of Entyloma hieracii causes spots on live leaf of Hieracium vulgatum

Foodplant / miner
larva of Liriomyza hieracii mines leaf of Hieracium vulgatum
Other: sole host/prey

Foodplant / false gall
larva of Noeeta pupillata causes swelling of capitulum of Hieracium vulgatum

Foodplant / parasite
uredium of Puccinia hieracii var. hieracii parasitises live leaf of Hieracium vulgatum

Canada

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: G4 - Apparently Secure