Flora of North America species comparison

1, ascending to erect, slightly to strongly flexuous, striate, glabrous.

erect, simple, glabrous or sparsely strigose, eglandular.

basal and cauline; alternate;

sessile;

basal withering, oblanceolate;

proximal cauline sometimes withering, reduced;

mid cauline blades (1-nerved, venation brochidodromous) lanceolate to elliptic (little reduced distally, much reduced in arrays), margins entire, faces glabrate to moderately short-woolly or strigose.

mid and distal not crowded, blades broadly lanceolate to oblanceolate, 50–130 × 15–45 mm, reduced and narrower distally, bases cuneate, margins flat to ± involute, finely ciliate, apices acuminate, faces glabrous or sparsely hairy.

1–10 mm (leafless or nearly so), sparsely to moderately canescent;

bracts linear-lanceolate to broadly lanceolate.

3.8–6.8 mm.

cylindro-campanulate (3–6.8 ×) 1.8–4.6 mm.

slightly convex, pitted, epaleate.

2–10(–16), pistillate, fertile;

corollas white.

4–13(–20);

corollas 4–7 mm, lobes 2.5–3.5 mm, 50–75% of limbs.

4–25(–50), bisexual, fertile;

corollas pale yellow, ampliate, tubes shorter than throats, lobes 5, often spreading to reflexed, deltate (2–4.2 mm);

style-branch appendages narrowly lanceolate (papillate on at least distal 1/2).

in 4–5 series, midveins usually swollen and translucent, apices narrowly rounded, glabrate.

16–40 in 3–5 series (erect), 1-nerved, (midnerves raised, sometimes brownish and translucent, not keeled), lanceolate to deltate, unequal, pliable to rigid, margins narrowly scarious, dark green zone restricted to narrow bands along midnerves, apices rounded, glabrate to moderately strigose, sometimes strigose distally.

(1–)3–33(–78).

radiate, (3–300) in flat-topped corymbiform arrays.

1.8–3.8 mm, 6–10-ribbed, glabrous, rarely sparsely strigose, sometimes sparsely glandular;

pappi: outer 0.5–1 mm, inner 3.9–5 mm.

terete to narrowly obconic, sometimes somewhat compressed (bases distinctly stipitate), 4–10-ribbed (ribs darkened, translucent, sometimes resinous), glabrous, eglandular, sometimes resinous;

pappi persistent in 4 series, whitish outer of linear to subulate, short (5–15 % length inner) scales, 3 inner of 60–90 white to tan, barbellate bristles, outer apically attenuate, innermost clavate.

(3–)4–8(–11);

laminae 6–12(–14.5) × 1–3.3 mm.

= 9.

= 18.