Flora of North America species comparison

usually 1, erect, ± densely gray-tomentose with fine, non-septate trichomes;

branches 0 or few, usually above middle in distal 1/2, ascending.

1 or few, erect, densely gray-tomentose;

branches 0 to several, ascending to spreading.

blades oblong to elliptic or obovate, 10–25(–40) × 2–6(–12) cm, coarsely dentate or shallowly lobed to deeply pinnatifid, lobes well separated, triangular to linear or oblong, often revolute-margined, ascending to spreading, spinulose to spinose-dentate, main spines 2–3(–10) mm, faces gray-tomentose, more densely abaxially, sometimes glabrate adaxially;

basal usually present at flowering, winged-petiolate;

principal cauline progressively reduced distally, bases decurrent as spiny wings 1–5 cm, sometimes with expanded auricles;

distal cauline usually much reduced, less lobed.

blades elliptic to obovate, 10–30 × 8–14 cm, deeply divided nearly to midveins, lobes ascending to spreading, linear, remote, margins revolute, entire or minutely spinulose, main spines 1–2 mm, faces gray-tomentose, more densely so abaxially;

basal present or withered at flowering, petiolate;

principal cauline well distributed, bases decurrent as linear-lobed to spiny wings 1–3 cm;

distal cauline well developed.

0–10 cm.

0–5 cm.

hemispheric to broadly campanulate, usually truncate or indented at base, 3–4 × 2.5–4 cm in first-formed heads, often smaller (1.5–2 cm) in later ones, loosely arachnoid on phyllary margins or glabrate.

ovoid to campanulate, 2–3 × 2–3 cm, loosely arachnoid on phyllary margins or glabrate.

dull white or lavender-tinged, 20–35 mm, tubes 10–17 mm, throats 6–11 mm, lobes 4–9 mm;

style tips 5–8 mm.

dull white or pinkish-tinged (rarely rich purple), 20–30 mm, tubes 8.5–15 mm, throats 4.5–10 mm, lobes 3–8 mm;

style tips 3.5–5.5 mm.

in 6–9 series, imbricate, ovate-lanceolate (outer) to linear-lanceolate (inner), abaxial faces with prominent glutinous ridge;

bodies of outer and middle appressed, acute, spines ascending to spreading, 2–4(–8) mm;

apices of inner expanded and flat, often twisted, scabrid-margined, and erose, spineless.

in 6–8 series, imbricate, ovate-lanceolate (outer) to linear-lanceolate (inner), abaxial faces with narrow glutinous ridge;

outer and middle appressed, acute, spines ascending to spreading, slender, 1–2(–3) mm;

apices of inner often flexuous, flattened, spineless, scabrid.

1–10+, terminal on branches or in distal axils, in openly corymbiform to racemiform arrays.

1–20+ in corymbiform arrays.

light brown, 5–7 mm, sometimes with darker streaks, apical collar very narrow, lighter colored;

pappi 18–30 mm, usually noticeably shorter than corolla.

light brown, sometimes with darker streaks, 6–7.5 mm, apical collars lighter colored, very narrow;

pappi 15–30 mm, usually noticeably shorter than corolla.

= 34, 36.

= 34.