Flora of North America species comparison

1–50+, decumbent to erect (sometimes brown or reddish brown, sometimes whitish distally, sometimes ± brittle), sparsely to densely hispido-strigose, sparsely to abundantly long-hispid, eglandular or sparsely to densely stipitate-glandular.

1–75, ascending to erect (proximaly sometimes reddish brown, often whitish due to pubescence, sometimes brittle), often short-branched in distal 1/2, usually sparsely long-hispid (more so in tetraploids), distally strigoso-canescent, eglandular (axillary leaf fascicles often present).

generally not crowded;

proximal cauline petiolate, blades oblanceolate, (90–)220–400(–600) × (2–)4–8(–13) mm, bases cuneate, margins flat, usually entire, rarely with 1–2 apical teeth, strigoso-ciliate, sparsely to abundantly long-hispido-strigose proximally, apices acute to obtuse, sometimes mucronate, faces sparsely to densely hispido-strigose, eglandular or sparsely to densely stipitate-glandular;

distal sessile, blades usually lanceolate or oblanceolate to oblong, rarely ovate or lanceolate-triangular, (4–)15–28(–42) × (1.5–)3.5–7(–12.5) mm, bases attenuate to convex-cuneate to rounded, margins usually flat, rarely remotely undulate, strigoso-ciliate, sparsely to abundantly long-hispido-strigose proximally, apices acute to obtuse, sometimes mucronate, faces sparsely to densely hispido-strigose, eglandular or sparsely to densely stipitate-glandular.

generally ascending, congested;

proximal cauline petiolate or subsessile, blades oblanceolate, 19–32 × 2–6 mm, bases convex-cuneate to attenuate, margins flat, entire, strigoso-ciliate, proximally long-hispido-strigose, apices acute, faces densely strigose, long-hispid hairs few, eglandular;

distal sessile, usually silvery gray-green, blades linear-oblanceolate, 11–29 × 2–5 mm, little reduced distally, apices acute, faces very to extremely densely strigoso-canescent (90–200 hairs/mm²; silvery-whitish), long-hispid hairs usually few, eglandular.

(4–)15–41(–98) mm, sparsely to densely hispido-canescent, eglandular or sparsely to densely stipitate-glandular;

bracts 1–7+, usually linear-oblanceolate, rarely leaflike and linear-oblanceolate, usually greatly reduced, margins usually flat, rarely remotely undulate, strigoso-ciliate, sparsely to abundantly long-hispido-strigose proximally, apices acute, sometimes mucronate, faces sparsely to densely hispido-strigose, eglandular or sparsely to densely stipitate-glandular; rarely 1–2 leaflike, oblanceolate bracts subtending heads.

2–10 mm, densely strigose, usually sparsely hispid;

bracts grading from leaves, proximal oblanceolate, sometimes little reduced distally; long, linear-oblancelate, leaflike bracts often subtending heads.

narrowly cylindric to campanulate, (5–)6–9.5(–13) mm.

cylindric to narrowly campanulate, 5–7(–7.5) mm (shorter than disc florets).

(5–)10–20(–38);

laminae (3.5–)6.5–11(–20) × 1–2(–3) mm.

10–22;

laminae 5–9(–10.5) × 0.8–1.4 mm.

(10–)20–50(–85);

corollas barely ampliate, (4–)5–6(–8) mm, glabrous or glabrate (few, minute hairs), lobes 0.4–0.75(–1) mm, glabrous or glabrate (hairs 0.1–0.35 mm).

(14–)22–40(–50);

corollas ± ampliate, 4.7–6.5 mm, throats glabrous, lobes 0.5–0.75 mm, lobes sparsely pilose (hairs 0.1–0.25 mm).

in 4–5 series, lanceolate to linear-lanceolate or triangular-lancelate, unequal (outer 1/5–1/3 length of inner), margins scarious, sometimes reddish purple distally, ciliate distally or apically, faces sparsely to densely strigose, eglandular or sparsely to moderately stipitate-glandular.

in 4–6 series, linear-lanceolate to lanceolate, unequal (outer lengths 1/5–1/4 inner), margins scarious, distally ciliate and reddish purple, faces moderately strigose, eglandular.

1–16(–42), in usually open, corymbiform, rarely paniculiform arrays.

1–9(–15), borne singly or in corymbiform arrays, branches ascending.

monomorphic, obconic, compressed, 1.7–2.7(–3.4) mm, ribs 4–8(–10) (rarely brownish), faces sparsely to moderately strigose;

pappi off-white, outer of linear scales 0.25–1 mm, inner of 30–45 bristle (4–)5–6.5(–8.5) mm, longest weakly clavate (usually equaling or longer than corollas).

monomorphic, obconic, compressed, 1.2–3.1 mm, ribs 6–10 (sometimes brownish), faces moderately strigose;

pappi off-white, outer of linear scales 0.25–0.5 mm, inner of 25–40 bristles 5–7.5 mm, longest weakly clavate.

= 18, 36.

= 18, 36.