Flora of North America species comparison

single, erect, often branched above middle, thinly arachnoid-tomentose, ± glabrate;

branches few, ascending.

1–several, spreading to erect, bushlike or forming low rounded mounds, gray-tomentose with appressed feltlike trichomes;

branches 0–several, inclined to ascending, stiff.

blades elliptic or ovate, 5–20 × 1–10 cm, usually deeply pinnatifid, lobes narrowly to broadly triangular, sinuses broad, rounded (basal and distal cauline sometimes less divided, lobes linear-lanceolate), margins revolute, spreading, entire or spinulose to remotely few-toothed or sharply lobed, main spines slender, 1–5 mm, abaxial faces white-tomentose, adaxial green, villous with septate trichomes or glabrate;

basal usually absent at flowering, winged-petiolate, bases tapered;

principal cauline well distributed, gradually reduced, bases narrowed, sometimes weakly clasping;

distal reduced, widely separated, distalmost bractlike.

blades elliptic to ovate, 10–25 cm, strongly undulate, usually broadly pinnatifid, lobes entire or coarsely few-toothed or -lobed, main spines abrupt, 1–4 mm, faces gray-white-tomentose with appressed feltlike, non-septate trichomes;

basal present or withered at flowering, winged-petiolate;

principal cauline well distributed, winged-petiolate to sessile, gradually reduced, bases clasping with expanded auricles;

distal reduced, spines to 8 mm.

2–20+ cm, essentially naked with much reduced bracts.

0–7 cm.

ovoid to broadly cylindric or campanulate, 2.5–3.5 × 2–3 cm, thinly arachnoid.

hemispheric or campanulate, 3–4 × 4–6 cm, densely arachnoid.

pink to purple (white), 32–38 mm, tubes 15–20 mm, throats 6–9 mm, lobes 8–11 mm;

style tips 5–6 mm.

white to pale yellow, 20–34 mm, tubes 11–15 mm, throats 5–8 mm, lobes 5–8 mm;

style tips 3–4 mm.

in 10–12 series, strongly imbricate, greenish with subapical darker central zone, ovate (outer) to lanceolate (inner), abaxial faces with narrow glutinous ridge;

outer and middle entire, bodies appressed, spines abruptly spreading to deflexed, slender, 2–4 mm;

apices of inner phyllaries narrow, flexuous, flattened, entire or finely erose.

in 8–10 series, imbricate, linear, abaxial faces without glutinous ridge;

outer and mid bases short- appressed, margins spiny-ciliate, apices long, spreading to erect, spines straight, 2–5 mm;

apices of inner flattened or spine-tipped, serrate to scabrid, sometimes pectinately fringed.

1–10+, borne at tips of main stem and branches.

1–many, erect, terminal on branches in subcapitate to congested, corymbiform arrays, closely subtended by clustered, ± leafy bracts.

brown, 5–6 mm, apical collars yellow, ca. 1 mm;

pappi 25–30 mm.

light–brown to black, 5–7 mm, apical collars whitish, 0.2–0.3 mm;

pappi 15–25 mm.

= 18 (as C. terrae-nigrae), 20 + 1B.

= 34.