Mostly a garden escape; locally
common in fields, roadsides and waste places. Flowers July to August. Not native..
Perennial. Colony-forming from
Aromatic. Stems are
often ridged lengthwise; pubescent
height is 3 to 5 feet.
inflorescences are flat-
to round-topped, confined mostly to the summit of stems. The
ascending branches each bear small, flat-topped clusters of flower heads
on short peduncles.
Flower heads are
disc-like, lacking ray
most bisexual and fertile, with yellow
corollas. A small number of florets at the
circumference may be pistillate
are deciduous by flowering. Stem leaves are oblong
in outline, deeply lobed.
primary lobes are toothed or also lobed.
are 4-5 angled, flat-topped. The pappus
consists of several minute scales.