Flora of North America species comparison

often spreading or prostrate, usually branched throughout, usually reddish, ± loosely tomentose.

few–many, erect, simple or branched.

mostly cauline, sessile and often short-decurrent or proximal tapering to winged petioles, blades lanceolate to oblanceolate, 6–25 cm, margins coarsely dentate or pinnately lobed, lobes and teeth armed with short, weak spines, faces sparsely to densely hairy with jointed multicellular hairs and slender cobwebby hairs, resin-gland-dotted.

± arachnoid-tomentose;

basal and proximal cauline winged-petiolate, blades lanceolate to ovate, 3–15 cm, margins entire or dentate;

distal cauline sessile, sometimes clasping, not decurrent, well developed.

± spheric, 20–40 mm.

ovoid to ± spheric, 15–20 mm.

many;

corollas yellow, those of sterile florets linear, 3-lobed, not exceeding disc corollas, very slender, those of disc florets 19–24 mm.

many, the peripheral sterile;

corollas pink or purple, those of sterile much expanded and exceeding corollas of fertile florets, those of fertile 20–25 mm.

in several series, tightly overlapping, outer ovate with tightly appressed bases and spreading spine tips, inner lanceolate, tipped by pinnately divided spines more than 5 mm.

tips erect, ovate or orbiculate, irregularly dentate or lobed.

disciform, borne singly, sessile, each subtended by involucre-like cluster of leaf-like bracts.

usually radiant, usually borne singly.

cylindric, slightly curved, 8–11 mm, with 20 prominent ribs, tipped by a 10-dentate rim, glabrous, attachment scars lateral;

pappi of 2 series of awns, outer 9–10 mm, smooth or ± roughened, inner 2–5 mm, roughened with short spreading hairs.

tan, 3–4 mm, finely hairy;

pappi 0 or of many unequal bristles 0.5–2 mm.

phyllaries: bodies lanceolate to ovate, loosely tomentose or glabrous, appendages brown or blackish, lanceolate to ovate, ± covering bodies of adjacent phyllaries, tips often recurved, elongate, featherlike, pectinately dissected into long, filiform lobes.

= 22.

= 22 (Russia), 44 (Slovenia).