OregonFlora species comparison

1–many, branched from bases, tomentose.

branched above, sparsely tomentose;

gland-dotted.

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.

villous, thinly to densely tomentose;

gland-dotted;

basal and lower cauline blades oblong to oblanceolate, 2–15 cm;

margins dentate, pinnately lobed or entire, petiolate to tapering at base; upper cauline blades linear to oblong, 1–5 cm, bases decurrent;

margins dentate to entire.

cyme-like clusters or heads solitary.

1–few in corymb-like arrays or heads solitary.

ovoid, 10–15 mm.

ovoid, 8–15 mm.

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

yellow, sterile florets ? fertile florets, fertile florets 10–14 mm.

outer ovate;

bodies green, palmately spiny;

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

outer ovate, bases spiny-fringed;

surfaces tomentose to glabrate;

central spines slender, 5–10 mm, often purple; inner entire; acute 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.

2.5–3 mm, white or light brown, finely hairy, pappi of unequal, white bristles, 1.5–3 mm.

disciform, pedunculate.

disciform.

=16.

=24.