Flora of North America species comparison

1–(2–3), ascending to erect (straight), proximally glabrate, distally uniformly villous or hirsute, or glabrous (var. glabratum).

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

thin, margins scabrous, apices mucronate, abaxial faces usually sparsely to densely strigose or strigillose, sometimes glabrous (var. glabrum), adaxial usually strigose or scabrous, sometimes glabrate or glabrous (var. glabrum);

basal withering by flowering, petiolate to subpetiolate (petioles narrowly winged, ciliate, bases sheathing), blades spatulate to oblanceolate-obovate, 10–40 × 5–10 mm, bases attenuate, margins crenate-serrate, apices acute to rounded;

proximalmost cauline usually withering by flowering, petiolate or sessile (petioles narrowly winged, ± clasping), blades ovate or lance-ovate to elliptic-lanceolate or oblanceolate, 20–80(–12) × 5–35 mm, progressively reduced distally, bases attenuate to cuneate, margins serrate (sometimes coarsely) to crenate-serrate, apices acute to acuminate or short-caudate;

distal sessile, blades elliptic-lanceolate to oblanceolate or lanceolate, (6–)10–80+ × 2–25 mm, progressively reduced distally, bases cuneate, margins entire to serrulate, apices acute to acuminate.

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.

subsessile or 2–10(–20) mm, ± pilose, bracts 1–5, linear-lanceolate, pilose, grading into phyllaries.

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

campanulate, 3–5.5 mm.

hemispheric, (4–)5–6.5 mm.

(10–)15–26;

corollas usually white, rarely pinkish or light purple to blue, laminae 3.5–5.5(–8) × 0.5–1.5 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.

12–25;

corollas cream or light yellow turning magenta or purple (ampliate), 2.5–4(–4.5) mm, tubes shorter than funnelform throats, lobes slightly spreading to reflexed, lanceolate, 0.7–1.1 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, unequal, appressed or ± spreading, linear-obovate (outer) to oblong-lanceolate to linear (inner), bases indurate 1/3–3/4, margins narrowly scarious to apices, erose, hyaline, ciliate, green zones lanceolate, apices acute to acuminate, mucronulate, faces (outer) sparsely pilose or glabrous (var. glabratum), (inner) glabrous.

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, open, paniculiform arrays, branches ± ascending or divaricate to long-arching, ± secund.

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

gray or tan, oblong-obovoid, sometimes ± compressed, 1.2–1.8(–2) mm, 3–5-nerved, faces strigillose;

pappi whitish to white, 3–3.5 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.