Flora of North America species comparison

usually purple throughout, sometimes greenish or purple-spotted, hollow proximally, usually glabrous proximally (rarely pubescent toward bases when young), ± glandular-puberulent distally and among heads (glaucous throughout, at least when fresh).

(sometimes ± purple, sometimes glaucous, internodes usually shorter than leaves) erect, unbranched.

mostly in 4s–6s(–7s);

petioles (5–)10–30(–50) mm, glabrous;

blades pinnately veined, narrowly to broadly lanceolate, mostly (8–)12–25(–28) × (1.5–)2–6(–9) cm, bases gradually tapered, margins finely serrate (teeth rounded, blunt), abaxial faces sparingly and minutely ± scabrellous to glabrate, adaxial faces glabrous or sparingly puberulent.

mostly cauline; mostly whorled (3–7 per node), rarely opposite; petiolate;

blades pinnately veined or ± 3-nerved from at or near bases, deltate-ovate, lance-elliptic, lanceolate, lance-ovate, or ovate (bases gradually or abruptly tapered), margins serrate (usually with gland at apex of each tooth, apices acuminate), abaxial faces usually gland-dotted and hirsute, puberulent, pubescent, scabrous, or stipitate-glandular, sometimes glabrate, adaxial faces mostly puberulent to scabrous-hirsute and glabrescent, sometimes glabrate or glabrous.

often purplish, 6.5–9 × 2.5–5 mm.

cylindric, 2.5–7 mm diam.

flat or convex, epaleate.

(4–)5–7;

corollas usually pale pinkish or purplish, 4.5–6 mm.

4–22;

corollas usually purplish or pinkish, rarely white, throats funnelform, lobes 5, ovate to deltate;

styles: bases enlarged, puberulent, branches ± filiform to clavate (slightly dilated or flattened distally, papillose).

glabrous or outer with hairs on midveins.

persistent, 10–22 in 5–6 series, (pale pink to purple, rarely white, tightly appressed) striate or 1-nerved, mostly lance-ovate to lanceolate, unequal (outer 2–3 obtuse, densely pubescent or glabrescent, often gland-dotted, innermost glabrous or glabrescent).

in convex to rounded (dome-shaped), compound corymbiform arrays (ultimately broadly cylindric).

discoid, in (flat-topped or convex to rounded) compound, corymbiform arrays.

3–4.5 mm.

(dark brown to black or yellowish brown) prismatic, 5-ribbed, usually gland-dotted, sometimes scabrellous on ribs;

pappi persistent, of 25–40 (cream to pinkish purple) barbellate bristles in 1 series.

= 10.

= 20.