Flora of North America species comparison

erect (coarsely strigose, hispid, or hirsute), usually branched (at least distally, sometimes branched from bases, aerial stems multiple).

basal and cauline; alternate; petiolate (basal and proximal cauline) or sessile (distal);

blades (pinnately nerved) mostly oblong to lanceolate, usually 1(–2)-pinnately lobed, bases ± cuneate, ultimate margins entire, faces coarsely strigose, hispid, or hirsute.

(5–)10–30 cm.

gradually smaller distally, primary lobes ovate to narrowly linear, their margins sometimes again lobed or toothed.

6–10 mm.

hemispheric, 6–10 mm diam.

flat, paleate (paleae linear to narrowly oblong, hirsute-ciliate at tips).

10–16 mm.

8–9 (each subtended by an inner phyllary), pistillate, fertile;

corollas yellow (laminae oblong-elliptic, entire or minutely 2–3-toothed).

3.5–5 mm.

25–50, functionally staminate;

corollas yellow, tubes shorter than campanulate throats, lobes 5, ± deltate (anthers black, appendages deltate, obtuse; styles not branched).

persistent (outer) or falling (inner, with cypselae), mostly 18–24+ in ± 3 series (outer with relatively short, expanded, indurate bases and longer, linear, herbaceous tips, inner broadly ovate, mostly indurate, scarious-margined, herbaceous tips relatively broader and shorter, tending to split along midveins in age).

radiate, in open, corymbiform arrays.

3–4 mm;

pappi 1–2 mm.

obcompressed or obflattened, obovate (each falling with subtending phyllary, 2–4, indurate paleae, plus sterile ovaries of 2–4 disc florets, margins ± ciliate, faces strigose to pilose);

pappi persistent or tardily falling, of 2–4, ciliate scales.

tips hirsute-ciliate.

= 9.

= 18.