Flora of North America species comparison

usually dark purple at nodes, usually otherwise greenish, rarely purplish green, usually solid, rarely ± hollow near bases, glabrous proximally, ± glandular-puberulent distally and among heads.

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).

mostly in 3s–4s(–5s);

petioles 5–15(–20) mm, glabrous or sparingly puberulent, rarely ciliate;

blades pinnately veined, lance-ovate or ovate to deltate-ovate, mostly (7–)9–26(–30) × (2.5–)3–15(–18) cm, bases abruptly or gradually tapered, margins coarsely serrate, abaxial faces sparingly and minutely gland-dotted and densely pubescent to glabrate, adaxial faces sparingly puberulent and glabrescent or glabrous.

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.

often purplish, 6.5–9 × 2.5–5 mm.

often purplish, 6.5–9 × 2.5–5 mm.

(4–)5–7(–8);

corollas usually pale pinkish or purplish, 4.5–7 mm.

(4–)5–7;

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

usually glabrous, sometimes sparsely hairy.

glabrous or outer with hairs on midveins.

in loose, convex, compound corymbiform arrays.

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

3–4.5 mm.

3–4.5 mm.

= 20.