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"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
John L. Strother +
(Nuttall) Fresenius +
decurrent +
Iva xanthiifolia +
compound +  and simple +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
12 cm120 mm <br />0.12 m <br /> (18 cm180 mm <br />0.18 m <br />) +
6 cm60 mm <br />0.06 m <br /> (12 cm120 mm <br />0.12 m <br />) +
rhombic;ovate;rhombic;ovate;deltate +
5cm;12cm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Ive à feuilles de lampourde +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
hispidulous +, strigillose +  and striate +
scabrellous +  and tuberculate +
plumply obovoid +  and obcompressed +
fertile +  and bisexual +
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 +
strigillose +
scabrellous +
staminate +  and pistillate +
winged +  and beaked +
dispersed +
Disturbed sites: abandoned fields, bottomlands, flood plains, stream banks +
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
glabrate +  and glabrous +
scarious +  and membranous +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
turbinate;hemispheric +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
conspicuous +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
sericeous +  and strigillose +
2-carpellate +
spatulate;linear +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
membranous +
persistent +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
7 cm70 mm <br />0.07 m <br /> (12 cm120 mm <br />0.12 m <br />) +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Flowering Jul–Oct. +
10 +  and 12 +
unequal +  and subequal +
Index Seminum (Frankfurt) +
bearing subulate enations +, hairy +  and bristly +
convex;conic +
exalbuminous +
Illustrated +  and Endemic +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Ambrosieae +  and Undefined (tribe Undefined) subtribe Iveae +
Cyclachaena xanthiifolia +
Cyclachaena +
species +
campanulate +  and cylindric +
toothed +  and entire +
120 cm1,200 mm <br />1.2 m <br /> (200 cm2,000 mm <br />2 m <br />) +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
shrub +  and subshrub +