Cyclachaena xanthiifolia

(Nuttall) Fresenius

Index Seminum (Frankfurt) 1836: 4. 1836.

Common names: Ive à feuilles de lampourde
IllustratedEndemic
Basionym: Iva xanthiifolia Nuttall Gen. N. Amer. Pl. 2: 185. 1818 (as xanthifolia)
Treatment appears in FNA Volume 21. Treatment on page 28.

Leaves: petioles 1–7(–12+) cm; blades 6–12(–20+) × 5–12(–18+) cm. Peduncles 1–6(–12+) mm. Involucres 2–3 mm. Phyllaries: outer 5 ± herbaceous, sericeous to strigillose, inner scarious to membranous, glabrous or glabrate. Paleae 2–2.5 mm. Pistillate florets: corollas 0.1–0.5 mm, or 0. Functionally staminate florets: corollas 2–2.5 mm. Cypselae 2–2.5(–3) mm. 2n = 36.


Phenology: Flowering Jul–Oct.
Habitat: Disturbed sites: abandoned fields, bottomlands, flood plains, stream banks
Elevation: 1–1300 m

Distribution

V21-50-distribution-map.gif

Alta., B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask., Ariz., Calif., Conn., Colo., D.C., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.Dak., Tex., Utah, Vt., Va., Wash., Wis., Wyo.

Discussion

Cyclachaena xanthiifolia is thought to be native to North American prairies and is evidently adventive east of the Mississippi River and in western states. It was recorded once from California as a weed in commercially grown carrots (specimen in CAS).

Selected References

None.

Lower Taxa

None.
... more about "Cyclachaena xanthiifolia"
John L. Strother +
(Nuttall) Fresenius +
Iva xanthiifolia +
Ive à feuilles de lampourde +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ariz. +, Calif. +, Conn. +, Colo. +, D.C. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, Wis. +  and Wyo. +
1–1300 m +
Disturbed sites: abandoned fields, bottomlands, flood plains, stream banks +
Flowering Jul–Oct. +
Index Seminum (Frankfurt) +
Illustrated +  and Endemic +
Undefined (tribe Undefined) subtribe Ambrosieae +  and Undefined (tribe Undefined) subtribe Iveae +
Cyclachaena xanthiifolia +
Cyclachaena +
species +