Hieracium murorum

Plants 25–60+ cm. Stems proximally piloso-hirsute (hairs 1–3+ mm), distally stellate-pubescent and stipitate-glandular. Leaves: basal 3–6, cauline (0–) 2–3+; blades (often purple-mottled) ± elliptic, 50–110 × 25–45 mm, lengths 1.5–3 times widths, bases rounded to truncate, margins ± dentate, apices ± obtuse (apiculate), abaxial faces piloso-hirsute (hairs 1–3+ mm), adaxial scabrous to piloso-hirsute (hairs 0.5–3 mm). Heads 5–8+ in corymbiform arrays. Peduncles densely stellate-pubescent and stipitate-glandular. Calyculi: bractlets 8–13+. Involucres campanulate to obconic, 8–9 mm. Phyllaries 18–21+, apices ± acuminate, abaxial faces stellate-pubescent and stipitate-glandular. Florets 30–50+; corollas yellow, 12–13 (–16) mm. Cypselae columnar, 2.5–3 mm; pappi of 30–40+, stramineous bristles in ± 2 series, 4–5 mm.

Phenology: Flowering Jun.
Habitat: Disturbed sites (fields, openings in woods), thickets
Elevation: 0–100+ m

Introduced; B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que., Alaska, Conn., Ill., Maine, Mass., Mich., N.H., N.J., N.Y., Pa., Vt., Europe

Discussion

Selected References

None.

Lower Taxa