Compilation
Hieracium pilosella

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Name

Identification
Hieracium pilosella [family COMPOSITAE ] (stored under name); Verified by Not on sheet.,
Related name
  • Hieracium pilosella
Common name
  • Mouse-ear hawkweed, Flora of North America Vol. 19
  • épervière piloselle, Flora of North America Vol. 19

Flora

Entry for Hieracium pilosella Linnaeus [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 19,
Names
Hieracium pilosella Linnaeus [family COMPOSITAE], Sp. Pl., 2: 800. 1753
Hieracium pilosella var. niveum Müller Argoviensis [family COMPOSITAE]
Pilosella officinarum F. W. Schultz & Schultz-Bipontinus [family COMPOSITAE]
Treatment Author(s)
John L. Strother
Information
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.
Phenology
may (spring), jun-aug (summer)
Altitude range
10–100+ m;
Distribution
St. Pierre and MiquelonEurope.USA Conn.USA Del.USA Ga.USA Ky.USA MaineUSA Md.USA Mass.USA Mich.USA Minn.USA N.H.USA N.J.USA N.Y.USA N.C.USA OhioUSA Oreg.USA Pa.USA R.I.USA Tenn.USA Vt.USA Va.USA Wash.USA W.Va.Canada B.C.Canada N.B.Canada Nfld. and Labr. (Nfld.)Canada N.S.Canada Ont.Canada Que.
Native/Introduced
introduced;

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