Flora of North America species comparison

1, erect (straight, stout), glabrous or hairy.

1–3+, erect (straight, stout), glabrous.

thin, scabrous, apices mucronate, abaxial faces glabrous (vein areoles indistinct, elongate), adaxial glabrous or sparsely scabrous (var. hesperium);

basal withering by flowering, petiolate to subpetiolate (petioles winged, ciliate, bases dilated, sheathing), blades elliptic-oblanceolate or obovate to suborbiculate, 10–80 × 5–20 mm, cuneate to attenuate, margins crenate-serrate, apices acute to obtuse or rounded;

proximal cauline withering by flowering, sessile or subsessile, blades lance-ovate or oblanceolate to linear-lanceolate, (40–)50–150 × (3–)10–20(–35) mm, progressively reduced distally, bases cuneate, ± decurrent, margins serrate, apices acute to acuminate;

distal sessile, blades oblanceolate to linear, 30–100(–140) mm, only slightly reduced distally, bases cuneate, margins entire.

firm, margins serrulate to serrate, distally entire, ± revolute, scabrous, apices mucronate, abaxial faces glabrous or glabrate, adaxial scabrous, cauline often with axillary tufts of leaves;

basal withering by flowering, petiolate (petioles slightly winged, ciliate, sheathing), blades ovate or elliptic to elliptic-lanceolate, 15–120 × 15–35 mm, bases gradually to ± abruptly attenuate, margins crenate-serrate, apices obtuse to acute;

proximal cauline withering by flowering, petiolate to subpetiolate (clasping), blades elliptic to lanceolate, 85–100 × 18–30 mm, bases cuneate to slightly attenuate, apices acute to acuminate;

distal sessile, blades elliptic or elliptic-lanceolate to lanceolate, or lance-oblong to linear-lanceolate (arrays), 8–90 × 1–25 mm, progressively reduced distally, abruptly so in arrays, bases cuneate, margins entire, apices acute to acuminate.

0.5–5 cm, ± pilose, bracts 1–3(–5), linear-oblanceolate to -lanceolate, foliaceous, ciliate.

0.4–3 cm, secund, glabrous, bracts 5–10, not crowded, linear to linear-lanceolate, spreading, foliaceous, grading into phyllaries.

campanulate to cylindric, 3–8 mm.

hemispheric, (4–)5–6.5 mm.

16–50;

corollas white to pinkish or pale blue-violet, laminae 3–10(–14) × 0.5–1.3 mm.

(20–)27–36;

corollas usually white to bluish or lavender-white, rarely pale lavender or lavender-pink, laminae 8–11 × 1–1.5 mm.

(13–)20–40(–52);

corollas yellow becoming purple, 2.8–5.8 mm, tubes shorter than funnelform throats, lobes sometimes ± spreading, triangular, 0.4–1.2 mm.

25–31;

corollas yellow turning reddish then brown, (4.1–)4.5–5.8 mm, tubes shorter than funnelform throats, lobes recurved to erect, lanceolate, 1.1–1.3 mm.

in (3–)4–6 series, appressed or slightly spreading, linear-lanceolate to linear (innermost), sometimes slightly dilated distally, ± strongly unequal to subequal (var. hesperium), bases indurate 1/4–1/2, margins scarious, erose, hyaline, sparsely ciliolate, green zones lanceolate to linear-lanceolate, outer sometimes foliaceous (particularly var. hesperium), apices acute to acuminate (outer) or acuminate to caudate (inner), mostly mucronulate, abaxial faces glabrous, adaxial sparsely strigillose.

in 5–6 series, lanceolate to oblong-lanceolate (some inner linear), unequal, bases indurate 1/3–2/3, margins scarious, erose, hyaline, sparsely ciliolate, green zones lanceolate, prominent, apices acute (acuminate), slightly spreading, faces glabrous.

in ample or diffuse to narrow, elongate, leafy, paniculiform arrays, branches ± ascending, rarely secund, branch leaves often longer than pedicels.

in leafy, open, paniculiform arrays, branches ascending to divaricate, nearly horizontal, elongate (to 38 cm), secund-racemiform.

gray or tan, obovoid, ± compressed, 1.5–2 mm, 4–5-nerved, faces sparsely strigillose;

pappi white to sordid or tawny, 5.5–6 mm.

tan to reddish brown, obovoid to fusiform-obovoid, ± compressed, 1.4–2.9 mm, 4–5-nerved, faces strigillose;

pappi white (sordid), 4.5–5.8 mm.

= 48.