- Commonly cultivated and escaped to roadsides and waste ground.
- Native to Mexico and the southwestern U.S.
- This striking species can be found escaped in just a few counties of Missouri. The ray flowers range in color from white to deep purple. The most common color is pink. The plant can be aggressive and weedy if left unchecked and it should not be willingly spread in the wild.
Photographs taken off Highway 70 near Kingston, NC., 9-29-02.
Following modified from Malezas de Mexico, CONABIO
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30—200 cm, glabrous or sparsely puberulent, sometimes scabridulous.
petioles 0 or to 1 cm; blades 6—11 cm, ultimate lobes to 1.5 mm wide, margins entire, apices acute (indurate).
of spreading, linear to lanceolate bractlets 6—13 mm, apices acuminate.
7—15 mm diam.
erect, lanceolate to ovate-lanceolate, 7—13 mm, apices round or obtuse.
white, pink, or purplish, laminae obovate to oblanceolate, 15—50 mm, apices ± truncate, dentate.
7—16 mm, glabrous, papillose;
0, or of 2—3 ascending to erect awns 1—3 mm.
is native to Mexico and the southwestern United States. A garden favorite, it has escaped and naturalized widely elsewhere in the flora area (and in warm climates almost worldwide), and it has been seeded along roadsides by some highway departments. Many cultivated races and hybrids differ considerably from the wild type described above, varying widely in stature and in coloration of both ray and disc corollas. Some plants in cultivation lack pappi; they are referable to var.
de Candolle, not treated formally here.
Bate Smith, E. C. 1980. Astringent tannins of
. Phytochemistry 19: 982. Pillai, A., S. K. Pillai, and O. Jacob. 1975. Embryogeny, histogenesis and apical meristems of
Cav. Acta Bot. Indica 3: 68—78.
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