Flora of North America species comparison

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

simple proximally, openly branched distally, glabrous or thinly hairy.

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.

thinly pubescent, basal and proximal cauline petiolate, blades 10–15 cm, margins coarsely pinnately lobed;

mid cauline sessile or short-petiolate, short-decurrent, blades obovate or narrowly oblong, 2–8 cm, entire to pinnately lobed;

distal cauline oblong, entire to irregularly lobed.

± spheric, 20–40 mm.

ovoid, 8–15 mm diam.

many;

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

many;

corollas pink-purple, those of sterile florets 25–30 mm, enlarged, raylike, those of fertile florets ± 20 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.

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

radiant, in open cymiform arrays, pedunculate.

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, 3–3.5 mm;

pappi many, white, unequal bristles 3–5 mm.

phyllaries: bodies greenish, ovate, scarious-margined, appendages stramineous to brown, scarious, fringed with slender teeth, tipped by slender spines 1–5 mm.

phyllaries unarmed with brown, expanded, lacerate appendages.

= 22.

= 20.