Flora of North America species comparison

usually single, erect, tomentose to ± glabrate;

branches 0–many, usually restricted to distal part, ascending.

1–several, spreading to erect, (usually very leafy in distal 1/2), loosely arachnoid, and villous with jointed, multicellular trichomes;

branches 0–few from above middle, ascending.

blades oblong to elliptic, 7–30 × 2–12 cm, unlobed and merely spinulose to irregularly dentate or shallowly to deeply pinnatifid, lobes ± triangular, separated by narrow to wide sinuses, sometimes coarsely dentate or lobed proximally, obtuse to acute, main spines slender to stout, 1–5 mm, abaxial faces arachnoid tomentose, adaxial glabrous or thinly arachnoid;

basal often absent at flowering, petioles slender, ± winged;

cauline progressively reduced, proximal petiolate, mid and distal broadly sessile, bases ± auriculate-clasping or decurrent 1–3 cm;

distalmost linear to lanceolate, bractlike, irregularly dentate or shallowly lobed.

linear to oblong or oblanceolate, 6–16 × 1–3.5 cm, unlobed to sinuate-dentate or shallowly pinnatifid, main spines 1–4 mm, fine, faces ± green, shaggy-villous with septate trichomes, abaxial loosely arachnoid when young;

basal and proximal cauline usually absent at time of flowering;

mid and distal nearly uniform in size or gradually reduced, bases clasping;

distalmost cauline ± bractlike.

slender, 3–30 cm (not overtopped by crowded distal leaves).

0–2 cm.

ovoid to hemispheric, 1.5–2 × 1.5–2 cm, thinly arachnoid, glabrate.

ovoid or cylindric to campanulate, 2–4 × 1.5–4 cm, loosely arachnoid, ± glabrate.

white to pink-purple, 20–25 mm, tubes 7–10 mm, throats 6–8 mm (noticeably wider than tubes), lobes 4–7 mm;

style tips 3–4 mm.

light purple, 33–40 mm, tubes 14–15 mm, throats 12–15 mm, lobes 7–9 mm;

style tips 4.5–6 mm.

in 8–10 series, imbricate, green, lanceolate (outer) to linear (inner), abaxial faces with prominent glutinous ridge;

outer and middle appressed, bodies entire, acute, spines spreading, slender, 1–5 mm;

apices of inner often flexuous, flat, scabrid-ciliolate, acuminate.

in 6–9 series, imbricate, lanceolate (outer) to linear (inner), abaxial faces with glutinous ridge, outer and middle tightly appressed, bodies scabrous or spinulose, spines erect or weakly ascending, 1–4 mm;

apices of inner phyllaries long-acuminate, spineless.

1–many, in openly paniculiform arrays.

1–5, in corymbiform arrays.

brown, 3–5 mm, apical collars not differentiated;

pappi 15–16 mm.

light brown, 3.5–4 mm, apical collars yellowish, ca. 0.8 mm;

pappi 15–30 mm.

= 22, 23, 24.

= 30.