Flora of North America species comparison

glabrous or minutely hispidulous.

minutely hispidulous.

basal and proximal absent at flowering;

cauline blades 1-nerved, linear or filiform to narrowly oblanceolate or lanceolate, 0.5–2.2(–4) mm wide, little reduced distally.

basal and proximal absent at flowering;

cauline blades 1- or 3-nerved, linear to lanceolate, sometimes filiform and fascicled, 1.5–2(–3) mm wide, little reduced distally.

cylindric, 1–1.5 mm diam.

cylindric to cuneate-campanulate, 1.5–2(–3) mm diam.

1(–2; each enclosed by conduplicate inner phyllary);

corollas yellow, (1.5–)2–3.5 mm.

(2–)3–8;

corollas yellow, 3–5.5 mm.

1, sometimes 2 (functionally staminate; corollas broadly obdeltate-funnelform, throats widely flaring, lobes 1/3 corolla lengths, recurved-coiling).

(2–)3–9 (usually bisexual and fertile, rarely functionally staminate, corollas tubular-funnelform, lobes erect to spreading or recurved, deltate).

(2–6, sessile to subsessile, in compact glomerules) in flat-topped arrays.

(sessile to subsessile in compact glomerules) in dense, flat-topped, corymbiform arrays.

1–1.8(–2.5) mm, faces densely strigoso-sericeous;

pappi (rays, readily falling) of 1 series of narrowly lanceolate-oblong scales.

0.8–1.6(–2.2) mm, faces without oil cavities, densely strigoso-sericeous;

pappi of 1–2 series of narrowly oblong- to ovate-lanceolate or obovate scales (readily falling, those of discs 1/3–1/2 corollas, shorter on rays).

apices flat.

apices flat.

= 8, 16, 24, 32.

= 8, 16, 32.