Packera aurea

(Linnaeus) Á. Löve & D. Löve

Bot. Not. 128: 520. 1976

Common names: Golden ragwort
IllustratedEndemic
Basionyms: Senecio aureus Linnaeus Sp. Pl. 2: 870. 1753
Synonyms: Senecio aureus var. aquilonius Fernald Senecio aureus var. ashei Greenman Senecio aureus var. aurantiacus Farwell Senecio aureus var. gracilis (Pursh) Hooker Senecio aureus var. intercursus Fernald Senecio gracilis
Treatment appears in FNA Volume 20. Treatment on page 579. Mentioned on page 572.

Perennials, 30–60+ cm; rhizomatous and/or fibrous-rooted (rhizomes or caudices erect to horizontal). Stems 1 or 2–3+, clustered, glabrous or leaf axils tomentose. Basal leaves petiolate; blades cordate to reniform, 20–60 × 20–60 mm, bases abruptly contracted or ± cordate, margins crenate to crenate-serrate (apices rounded, faces glabrous). Cauline leaves gradually reduced (petiolate or sessile, not clasping; blades oblong to lyrate, lateral lobes 2–4 pairs). Heads 6–20+ in corymbiform to subumbelliform arrays. Peduncles bracteate, glabrous or sparsely tomentose. Calyculi inconspicuous. Phyllaries 13–21, green (tips purple or black), 6–8 mm, glabrous or sparsely tomentose proximally. Ray florets (8–)10–13; corolla laminae 8–10+ mm. Disc florets 55–70+; corolla tubes 3–3.5 mm, limbs 2–2.5 mm. Cypselae 1–1.5 mm, glabrous; pappi 4.5–5.5 mm. 2n = 44.


Phenology: Flowering late Feb–early May (south), late May–early Aug (north).
Habitat: Damp and swampy places in woodlands, meadows, along gravel banks and streambeds, acidic or sandy/gravelly soils
Elevation: 0–1500 m

Distribution

V20-1285-distribution-map.gif

St. Pierre and Miquelon, Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Ala., Ark., Conn., D.C., Fla., Ga., Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Miss., Mo., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Vt., Va., W.Va., Wis.

Discussion

Packera aurea is abundant and widespread throughout eastern United States and Canada. It reproduces asexually from branched rhizomes or from adventitious shoots. Putative hybrids between P. aurea and P. paupercula, P. pseudaurea, P. schweinitziana, and P. tomentosa have been reported.

Selected References

None.

Lower Taxa

None.

... more about "Packera aurea"
Debra K. Trock +
(Linnaeus) Á. Löve & D. Löve +
Senecio aureus +
Golden ragwort +
St. Pierre and Miquelon +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Ala. +, Ark. +, Conn. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–1500 m +
Damp and swampy places in woodlands, meadows, along gravel banks and streambeds, acidic or sandy/gravelly soils +
Flowering late Feb–early May (south), late May–early Aug (north). +
Illustrated +  and Endemic +
Senecio aureus var. aquilonius +, Senecio aureus var. ashei +, Senecio aureus var. aurantiacus +, Senecio aureus var. gracilis +, Senecio aureus var. intercursus +  and Senecio gracilis +
Packera aurea +
species +