OregonFlora species comparison

often acaulescent or short-caulescent, sometimes caulescent with a single bushy-branched stem; stout and fleshy, glabrous or sparsely arachnoid-tomentose.

erect, branched or simple, sometimes spiny-winged.

linear to elliptic, 10–40 × 3–8 cm;

margins entire to deeply pinnately divided; plane or undulate;

spines usually thin to moderately thick, 2–15 mm;

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

basal usually present at flowering, sessile 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.

ovoid to hemispheric, 1–3(4) × 1.5–6 cm, glabrous to thinly arachnoid-villous.

flat to convex; very bristly;

paleae 0.

corollas 20–40 mm, white to purple, sometimes rose or pink-tinged;

tubes 9–22 mm;

throats 4–12 mm;

lobes 4–10 mm;

styles conspicuously exserted;

tips 3–8 mm.

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

style tips elongate.

imbricate; without glutinous ridges;

spines thin, 0–12 mm.

many in 5–20 series, imbricate or not;

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

midveins sometimes with glutinous ridges.

4–6.5 mm; light to dark brown, occasionally striate;

pappi 15–35 mm.

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

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

1–many.

discoid, pedunculate or sessile.