OregonFlora species comparison

1–many, branched from bases, tomentose.

branched throughout, puberulent, sparsely to densely tomentose.

tomentose and scabrous to bristly, bases decurrent;

basal and lower cauline blades often absent at maturity, 5–15 cm, pinnately dissected or lobed;

petioles winged; upper cauline blades oblong to linear, 1–10 cm;

margins entire or slightly dentate, sessile.

surfaces hispidulous and sparsely to densely tomentose;

gland-dotted;

basal and lower cauline blades 10–15 cm, 1- or 2-pinnately divided to narrowly lobed, petiolate; upper cauline blades much reduced, 1-pinnate to entire, sessile.

cyme-like clusters or heads solitary.

diffuse; panicle-like arrays.

ovoid, 10–15 mm.

cylindric to narrowly ovoid, 10–13 mm.

yellow, sterile florets ? fertile florets, fertile florets 13–20 mm.

creamy white, rarely pink or purple, sterile florets ? fertile florets, fertile florets 12–15 mm.

outer ovate;

bodies green, palmately spiny;

central spines stout, 10–25 mm; straw-colored; inner with smaller hyaline appendages.

pale green, with a few prominent parallel veins; outer ovate to lanceolate; straw-colored;

central spines 1–4 mm; inner lanceolate, lacerate or spine-tipped.

dimorphic; outer 2–3 mm, dark brown, glabrous;

pappi 0; inner light brown or mottled, pappi of white bristles, 2–4 mm.

2–3 mm, dark brown, glabrous;

pappi absent or < 0.5 mm.

disciform, pedunculate.

disciform;

peduncles short.

=16.

=18.