Galinsoga quadriradiata

Ruiz & Pavón

Syst. Veg. Fl. Peruv. Chil. 1: 198. 1798.

WeedyIntroducedIllustrated
Synonyms: Galinsoga bicolorata H. St. John & D. White Galinsoga caracasana (de Candolle) Schultz-Bipontinus Galinsoga ciliata (Rafinesque) S. F. Blake
Treatment appears in FNA Volume 21. Treatment on page 182. Mentioned on page 181.

Plants 8–62 cm. Leaf blades 20–60 × 15–45 mm. Peduncles 5–20 mm. Involucres hemispheric to campanulate, 3–6 mm diam. Phyllaries falling. Paleae: outer falling, broadly elliptic to obovate, 2–3 mm; inner falling, linear to lanceolate, 2–3 mm, entire or 2- or 3-lobed, lobes to 1/3 total lengths, blunt. Ray florets (4–)5(–8); corollas usually white, sometimes pink, laminae 0.9–2.5 × 0.9–2 mm. Disc florets 15–35. Cypselae: rays 1.5–2 mm; discs 1.3–1.8 mm; pappi: rays of 6–15 fimbriate scales 0.5–1 mm; discs 0, or of usually 14–20, rarely 1–5, white, lanceolate to oblanceolate, fimbriate, sometimes aristate, scales 0.2–1.7 mm. 2n = 32 [48, 64].


Phenology: Flowering and fruiting summer–fall.
Habitat: Disturbed soils, fields, orchards, gardens, lawns, roadsides
Elevation: 0–2500 m

Distribution

V21-446-distribution-map.gif

Introduced; Alta., B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask., Ala., Ark., Colo., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mo., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., Wash., W.Va., Wis., Mexico, West Indies, Central America, South America, introduced in Europe, Asia, Africa, Pacific Islands.

Discussion

Tetraploids of Galinsoga quadriradiata are native to Mexico. Higher polyploids are found in South America and differ from the tetraploids by their coarsely crenate-serrate leaves, cylindro-campanulate involucres, and usually reddish purple limbs of ray corollas that extend at right angles to involucres.

Selected References

None.

Lower Taxa

None.
... more about "Galinsoga quadriradiata"
Judith M. Canne-Hilliker +
Ruiz & Pavón +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ala. +, Ark. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Mexico +, West Indies +, Central America +, South America +, introduced in Europe +, Asia +, Africa +  and Pacific Islands. +
0–2500 m +
Disturbed soils, fields, orchards, gardens, lawns, roadsides +
Flowering and fruiting summer–fall. +
Syst. Veg. Fl. Peruv. Chil. +
Weedy +, Introduced +  and Illustrated +
Galinsoga bicolorata +, Galinsoga caracasana +  and Galinsoga ciliata +
Galinsoga quadriradiata +
Galinsoga +
species +