Mouse-ear hawkweed, épervière piloselle

Hieracium pilosella var. niveum Müller Argoviensis; Pilosella officinarum F. W. Schultz & Schultz-Bipontinus

Plants 10–25(–40+) cm. Stems proximally piloso-hirsute (hairs 1–3+ mm) and stellate-pubescent, distally piloso-hirsute (hairs 1–2 mm), stellate-pubescent, and stipitate-glandular. Leaves: basal (2–)5–10+, cauline 0(–3); blades elliptic to ± oblanceolate, 10–45(–75+) × 5–12(–18+) mm, lengths 2–4(–6+) times widths, bases cuneate, margins entire, apices acute, faces piloso-hirsute (hairs 2–7+ mm) and stellate-pubescent. Heads usually borne singly, rarely 2(–3). Peduncles piloso-hirsute and stellate-pubescent. Calyculi: bractlets 8–15+. Involucres hemispheric to obconic, 7.5–9 mm. Phyllaries 20–34+, apices acuminate, abaxial faces stellate-pubescent and stipitate-glandular, sometimes piloso-hirsute as well. Florets 60–120+; corollas yellow (often each with abaxial red stripe), 8–13+ mm. Cypselae columnar, 1.5–2 mm; pappi of 30+, white bristles in 1 series, 4–5 mm.

Flowering May–Aug. Disturbed sites (sandy or gravelly soils, fields, lawns, roadsides); introduced; 10–100+ m; St. Pierre and Miquelon; B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que.; Conn., Del., Ga., Ky., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Oreg., Pa., R.I., Tenn., Vt., Va., Wash., W.Va.; Europe.