OregonFlora species comparison

usually 1; slender, arachnoid-villous, sometimes thinly so.

erect, branched or simple, sometimes spiny-winged.

linear-oblong to elliptic, 7–35 × 1–15 cm;

margins entire to dentate or pinnately lobed;

lobes triangular-ovate to linear;

spines fine, 1–6 mm;

surfaces abaxially thinly to densely tomentose, adaxially glabrate to thinly arachnoid-villous;

basal occasionally present at flowering, sessile, clasping, or petiolate.

basal and cauline, alternate;

margins entire to deeply toothed or pinnately lobed;

lobes and teeth usually spiny.

heads solitary at branch tips or distal axils, or in raceme- or panicle-like arrays.

hemispheric to campanulate, 1–2.5 × 1.5–3.5 cm, glabrous to thinly arachnoid-villous.

flat to convex; very bristly;

paleae 0.

corollas 16–25 mm, cream-colored to purple;

tubes 6–12 mm;

throats 5–10.5 mm;

lobes 3.5–8 mm;

styles conspicuously exserted;

tips 4–6 mm.

corollas bilateral, white or cream-colored to pink, red, or purple;

style tips elongate.

subequal to strongly imbricate, sometimes with inconspicuous glutinous ridges;

spines 1–6 mm; outer bases ? 2 mm wide.

many in 5–20 series, imbricate or not;

margins usually entire or occasionally scarious, ciliate-spiny, or erose;

midveins sometimes with glutinous ridges.

4.5–5.5 mm, tan to dark brown;

pappi 12–25 mm.

compressed; ovoid, tan to dark brown, glabrous, attachment scar off-center;

pappi in 3–5 series, persistent or deciduous in rings.

few–many.

discoid, pedunculate or sessile.