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).

usually purple-spotted, sometimes uniformly purple, solid, glabrous proximally, glandular-puberulent distally.

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 in 3s–4s;

petioles 7–25 mm, glabrous;

blades usually ± 3-nerved, rarely pinnately veined, deltate-ovate or ovate to lance-ovate, 5–16 × 2–8 cm, relatively thick and firm (often rugose), bases usually abruptly contracted to petioles, margins coarsely serrate, abaxial faces densely gland-dotted and sparingly hirsute (at least on midribs and main veins), adaxial faces scabrous, glabrescent.

often purplish, 6.5–9 × 2.5–5 mm.

often purplish, 6.5–9 × 2.5–5 mm.

(4–)5–7;

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

(4–)5–9(–10);

corollas usually dark purple, rarely pinkish or white, 4.5–7 mm.

glabrous or outer with hairs on midveins.

glabrous or sparsely hairy.

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

usually in ± convex, sometimes flat-topped, corymbiform arrays.

3–4.5 mm.

3–4.5 mm.

= 20.

= 20.