Flora of North America species comparison

1–several, often forming rounded mounds, puberulent to loosely tomentose.

1–several, divaricately much branched, often forming rounded mound, puberulent to loosely tomentose.

puberulent to loosely gray-tomentose, becoming ± glabrous, minutely resin-gland-dotted;

proximal leaves petiolate, blades 10–20 cm, 1–3 times pinnately dissected, rosette with central cluster of spines;

mid sessile, not decurrent, blades ovate, usually less than 10 cm, narrowly lobed;

distal blades linear to oblong, entire to shallowly lobed.

hispidulous to loosely tomentose, ± glabrate, minutely resin-gland-dotted;

proximal leaves petiolate, blades 10–20 cm, margins 1–2 times pinnately lobed or dissected, rosette with central cluster of spines;

mid sessile, not decurrent, blades ± lanceolate, shorter;

distal blades linear to oblong, entire to coarsely dentate or shallowly lobed.

ovoid, 15–20 × 6–8 mm.

ovoid to hemispheric, (10–)13–18 mm.

25–40;

corollas purple, all ± equal, 15–24 mm;

sterile corollas slender.

many;

corollas white, pink, or pale purple, those of sterile florets slender, 15–20 mm, those of fertile florets 15–20 mm.

appendages truncate, spineless.

appendages truncate, spineless.

disciform, borne singly or in leafy cymiform arrays, sessile or short-pedunculate.

disciform, borne singly or in leafy cymiform arrays, sessile or short-pedunculate.

white or brown-streaked, 2.5–3.4 mm, glabrous;

pappi 0.

white- or brown-streaked, 3–4 mm, glabrous;

pappi of white bristles 1–2.5(–3) mm.

phyllaries: bodies greenish or stramineous, ovate, scarious-margined, appendages stramineous, spiny fringed at base, each tipped by a stout spreading spine 10–25 mm.

phyllaries: bodies greenish or stramineous, ovate, scarious–margined, appendages stramineous, spiny–fringed at base, each tipped by stout spreading spine (0.5–)1–3 cm.

= 20.

= 16, 20.