Flora of North America species comparison

simple or often branched from base, forming rounded bushy plants, gray-tomentose.

1–few, few–many branched distally.

gray-tomentose and scabrous to short-bristly;

basal and proximal cauline petiolate or tapered to base, usually absent at anthesis, blades 5–15 cm, margins pinnately lobed or dissected;

cauline long-decurrent, blades linear to oblong, 1–10 cm, entire.

basal and proximal cauline petiolate or tapering to base, usually absent at anthesis, blades oblong to oblanceolate, 2–15 cm, margins entire to dentate or pinnately lobed;

cauline long-decurrent, blades linear to oblong or oblanceolate, 1–5 cm, entire or dentate.

ovoid, 13–17 mm, loosely cobwebby-tomentose or becoming glabrous.

ovoid, 10–15 mm, loosely cobwebby-tomentose or becoming glabrous.

many;

corollas yellow, all ± equal, 13–20 mm;

sterile florets slender, inconspicuous.

many;

corollas yellow, those of sterile florets 10–12 mm, slender, inconspicuous, those of fertile florets 10–12 mm.

appendages scarious, obtuse or abruptly spine tipped.

appendages entire, acute or spine-tipped.

disciform, borne singly or in open leafy arrays, long-pedunculate.

disciform, 1–few at branch tips, borne singly or in open leafy corymbiform arrays, sometimes clustered in distal axils, sessile or pedunculate.

dimorphic, 2–3 mm, glabrous, outer dark brown, without pappi, inner white or light brown, mottled;

pappi of many white, unequal bristles 2–4 mm, fine.

dull white or light brown, ca. 2.5 mm, finely hairy;

pappi of many white, unequal, stiff bristles 2.5–3 mm.

phyllaries: bodies pale green, ovate, appendages stramineous to brown, each with palmately radiating cluster of spines, and stout central spine 10–25 mm.

phyllaries: bodies ± stramineous, ovate, appendages purplish, spiny-fringed at base, each tipped by slender spine 5–10 mm.

= 16.

= 24.