Packera obovata

(Muhlenberg ex Willdenow) W. A. Weber & Á. Löve

Phytologia 49: 47. 1981.

Common names: Roundleaf ragwort
Basionym: Senecio obovatus Muhlenberg ex Willdenow Sp. Pl. 3: 1999. 1803
Synonyms: Senecio aureus var. obovatus (Muhlenberg ex Willdenow) Torrey & A. Gray Senecio elliottii Torrey & A. Gray Senecio elongatus Pursh Senecio rotundus (Britton) Small
Treatment appears in FNA Volume 20. Treatment on page 594. Mentioned on page 572, 573.
Revision as of 18:41, 24 September 2019 by FNA>Volume Importer

Perennials, 20–50+ cm; stoloniferous and rhizomatous (rhizomes horizontal to suberect). Stems 1 or multiple, loosely clustered, usually glabrous, sometimes tomentose proximally and in leaf axils. Basal leaves (and proximal cauline) petiolate; blades orbiculate, ovate, or obovate, 40–100+ × 20–80+ mm, bases tapering, rounded, or abruptly contracted, margins crenate, dentate, or serrate. Cauline leaves gradually reduced (sessile, clasping; pinnatisect or sublyrate). Heads 6–15+ in open or congested, corymbiform arrays. Peduncles bracteate, glabrous or proximally tomentose. Calyculi conspicuous. Phyllaries 13 or 21, green (tips sometimes reddish), 3–6 mm, glabrous or floccose-tomentose proximally. Ray florets 8–13(–21); corolla laminae 7–10 mm. Disc florets 40–50+; corolla tubes 2–3 mm, limbs 2–3 mm. Cypselae 1–1.5 mm, glabrous or hirsute on ribs; pappi 3–6 mm. 2n = 44, 88, 90.


Phenology: Flowering late Feb–Apr (south), early Apr–early Jun (north).
Habitat: Meadows in deciduous woodlands, wet ditches, stream banks, rocky hillsides
Elevation: 0–2500 m

Distribution

V20-1329-distribution-map.gif

Ont., Que., Ala., Ark., Conn., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mass., Mich., Miss., Mo., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Mexico (Coahuila).

Discussion

Packera obovata forms relatively large, stoloniferous colonies in wet sites.

Selected References

None.

Lower Taxa

None.
... more about "Packera obovata"
Debra K. Trock +
(Muhlenberg ex Willdenow) W. A. Weber & Á. Löve +
Senecio obovatus +
Roundleaf ragwort +
Ont. +, Que. +, Ala. +, Ark. +, Conn. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +  and Mexico (Coahuila). +
0–2500 m +
Meadows in deciduous woodlands, wet ditches, stream banks, rocky hillsides +
Flowering late Feb–Apr (south), early Apr–early Jun (north). +
Senecio aureus var. obovatus +, Senecio elliottii +, Senecio elongatus +  and Senecio rotundus +
Packera obovata +
species +